{@code Class} has no public constructor. Instead {@code Class} + * objects are constructed automatically by the Java Virtual Machine as classes + * are loaded and by calls to the {@code defineClass} method in the class + * loader. + * + *
The following example uses a {@code Class} object to print the + * class name of an object: + * + *
+ * void printClassName(Object obj) {
+ * System.out.println("The class of " + obj +
+ * " is " + obj.getClass().getName());
+ * }
+ * It is also possible to get the {@code Class} object for a named + * type (or for void) using a class literal. See Section 15.8.2 of + * The Java™ Language Specification. + * For example: + * + *
+ * {@code System.out.println("The name of class Foo is: "+Foo.class.getName());} + *+ * + * @param
+ * {@code Class.forName(className, true, currentLoader)} + *+ * + * where {@code currentLoader} denotes the defining class loader of + * the current class. + * + *
For example, the following code fragment returns the + * runtime {@code Class} descriptor for the class named + * {@code java.lang.Thread}: + * + *
+ * {@code Class t = Class.forName("java.lang.Thread")} + *+ *
+ * A call to {@code forName("X")} causes the class named + * {@code X} to be initialized. + * + * @param className the fully qualified name of the desired class. + * @return the {@code Class} object for the class with the + * specified name. + * @exception LinkageError if the linkage fails + * @exception ExceptionInInitializerError if the initialization provoked + * by this method fails + * @exception ClassNotFoundException if the class cannot be located + */ + public static Class forName(String className) + throws ClassNotFoundException { + return forName0(className, true, ClassLoader.getCallerClassLoader()); + } + + + /** + * Returns the {@code Class} object associated with the class or + * interface with the given string name, using the given class loader. + * Given the fully qualified name for a class or interface (in the same + * format returned by {@code getName}) this method attempts to + * locate, load, and link the class or interface. The specified class + * loader is used to load the class or interface. If the parameter + * {@code loader} is null, the class is loaded through the bootstrap + * class loader. The class is initialized only if the + * {@code initialize} parameter is {@code true} and if it has + * not been initialized earlier. + * + *
If {@code name} denotes a primitive type or void, an attempt + * will be made to locate a user-defined class in the unnamed package whose + * name is {@code name}. Therefore, this method cannot be used to + * obtain any of the {@code Class} objects representing primitive + * types or void. + * + *
If {@code name} denotes an array class, the component type of + * the array class is loaded but not initialized. + * + *
For example, in an instance method the expression: + * + *
+ * {@code Class.forName("Foo")} + *+ * + * is equivalent to: + * + *
+ * {@code Class.forName("Foo", true, this.getClass().getClassLoader())} + *+ * + * Note that this method throws errors related to loading, linking or + * initializing as specified in Sections 12.2, 12.3 and 12.4 of The + * Java Language Specification. + * Note that this method does not check whether the requested class + * is accessible to its caller. + * + *
If the {@code loader} is {@code null}, and a security + * manager is present, and the caller's class loader is not null, then this + * method calls the security manager's {@code checkPermission} method + * with a {@code RuntimePermission("getClassLoader")} permission to + * ensure it's ok to access the bootstrap class loader. + * + * @param name fully qualified name of the desired class + * @param initialize whether the class must be initialized + * @param loader class loader from which the class must be loaded + * @return class object representing the desired class + * + * @exception LinkageError if the linkage fails + * @exception ExceptionInInitializerError if the initialization provoked + * by this method fails + * @exception ClassNotFoundException if the class cannot be located by + * the specified class loader + * + * @see java.lang.Class#forName(String) + * @see java.lang.ClassLoader + * @since 1.2 + */ + public static Class forName(String name, boolean initialize, + ClassLoader loader) + throws ClassNotFoundException + { + if (loader == null) { + SecurityManager sm = System.getSecurityManager(); + if (sm != null) { + ClassLoader ccl = ClassLoader.getCallerClassLoader(); + if (ccl != null) { + sm.checkPermission( + SecurityConstants.GET_CLASSLOADER_PERMISSION); + } + } + } + return forName0(name, initialize, loader); + } + + /** Called after security checks have been made. */ + private static native Class forName0(String name, boolean initialize, + ClassLoader loader) + throws ClassNotFoundException; + + /** + * Creates a new instance of the class represented by this {@code Class} + * object. The class is instantiated as if by a {@code new} + * expression with an empty argument list. The class is initialized if it + * has not already been initialized. + * + *
Note that this method propagates any exception thrown by the + * nullary constructor, including a checked exception. Use of + * this method effectively bypasses the compile-time exception + * checking that would otherwise be performed by the compiler. + * The {@link + * java.lang.reflect.Constructor#newInstance(java.lang.Object...) + * Constructor.newInstance} method avoids this problem by wrapping + * any exception thrown by the constructor in a (checked) {@link + * java.lang.reflect.InvocationTargetException}. + * + * @return a newly allocated instance of the class represented by this + * object. + * @exception IllegalAccessException if the class or its nullary + * constructor is not accessible. + * @exception InstantiationException + * if this {@code Class} represents an abstract class, + * an interface, an array class, a primitive type, or void; + * or if the class has no nullary constructor; + * or if the instantiation fails for some other reason. + * @exception ExceptionInInitializerError if the initialization + * provoked by this method fails. + * @exception SecurityException + * If a security manager, s, is present and any of the + * following conditions is met: + * + *
Specifically, if this {@code Class} object represents a + * declared class, this method returns {@code true} if the specified + * {@code Object} argument is an instance of the represented class (or + * of any of its subclasses); it returns {@code false} otherwise. If + * this {@code Class} object represents an array class, this method + * returns {@code true} if the specified {@code Object} argument + * can be converted to an object of the array class by an identity + * conversion or by a widening reference conversion; it returns + * {@code false} otherwise. If this {@code Class} object + * represents an interface, this method returns {@code true} if the + * class or any superclass of the specified {@code Object} argument + * implements this interface; it returns {@code false} otherwise. If + * this {@code Class} object represents a primitive type, this method + * returns {@code false}. + * + * @param obj the object to check + * @return true if {@code obj} is an instance of this class + * + * @since JDK1.1 + */ + public native boolean isInstance(Object obj); + + + /** + * Determines if the class or interface represented by this + * {@code Class} object is either the same as, or is a superclass or + * superinterface of, the class or interface represented by the specified + * {@code Class} parameter. It returns {@code true} if so; + * otherwise it returns {@code false}. If this {@code Class} + * object represents a primitive type, this method returns + * {@code true} if the specified {@code Class} parameter is + * exactly this {@code Class} object; otherwise it returns + * {@code false}. + * + *
Specifically, this method tests whether the type represented by the + * specified {@code Class} parameter can be converted to the type + * represented by this {@code Class} object via an identity conversion + * or via a widening reference conversion. See The Java Language + * Specification, sections 5.1.1 and 5.1.4 , for details. + * + * @param cls the {@code Class} object to be checked + * @return the {@code boolean} value indicating whether objects of the + * type {@code cls} can be assigned to objects of this class + * @exception NullPointerException if the specified Class parameter is + * null. + * @since JDK1.1 + */ + public native boolean isAssignableFrom(Class cls); + + + /** + * Determines if the specified {@code Class} object represents an + * interface type. + * + * @return {@code true} if this object represents an interface; + * {@code false} otherwise. + */ + public native boolean isInterface(); + + + /** + * Determines if this {@code Class} object represents an array class. + * + * @return {@code true} if this object represents an array class; + * {@code false} otherwise. + * @since JDK1.1 + */ + public native boolean isArray(); + + + /** + * Determines if the specified {@code Class} object represents a + * primitive type. + * + *
There are nine predefined {@code Class} objects to represent + * the eight primitive types and void. These are created by the Java + * Virtual Machine, and have the same names as the primitive types that + * they represent, namely {@code boolean}, {@code byte}, + * {@code char}, {@code short}, {@code int}, + * {@code long}, {@code float}, and {@code double}. + * + *
These objects may only be accessed via the following public static + * final variables, and are the only {@code Class} objects for which + * this method returns {@code true}. + * + * @return true if and only if this class represents a primitive type + * + * @see java.lang.Boolean#TYPE + * @see java.lang.Character#TYPE + * @see java.lang.Byte#TYPE + * @see java.lang.Short#TYPE + * @see java.lang.Integer#TYPE + * @see java.lang.Long#TYPE + * @see java.lang.Float#TYPE + * @see java.lang.Double#TYPE + * @see java.lang.Void#TYPE + * @since JDK1.1 + */ + public native boolean isPrimitive(); + + /** + * Returns true if this {@code Class} object represents an annotation + * type. Note that if this method returns true, {@link #isInterface()} + * would also return true, as all annotation types are also interfaces. + * + * @return {@code true} if this class object represents an annotation + * type; {@code false} otherwise + * @since 1.5 + */ + public boolean isAnnotation() { + return (getModifiers() & ANNOTATION) != 0; + } + + /** + * Returns {@code true} if this class is a synthetic class; + * returns {@code false} otherwise. + * @return {@code true} if and only if this class is a synthetic class as + * defined by the Java Language Specification. + * @since 1.5 + */ + public boolean isSynthetic() { + return (getModifiers() & SYNTHETIC) != 0; + } + + /** + * Returns the name of the entity (class, interface, array class, + * primitive type, or void) represented by this {@code Class} object, + * as a {@code String}. + * + *
If this class object represents a reference type that is not an + * array type then the binary name of the class is returned, as specified + * by + * The Java™ Language Specification. + * + *
If this class object represents a primitive type or void, then the + * name returned is a {@code String} equal to the Java language + * keyword corresponding to the primitive type or void. + * + *
If this class object represents a class of arrays, then the internal + * form of the name consists of the name of the element type preceded by + * one or more '{@code [}' characters representing the depth of the array + * nesting. The encoding of element type names is as follows: + * + *
+ * + *+ *
Element Type Encoding + * boolean Z + * byte B + * char C + * class or interface + * Lclassname; + * double D + * float F + * int I + * long J + * short S + *
The class or interface name classname is the binary name of + * the class specified above. + * + *
Examples: + *
+ * + * @return the name of the class or interface + * represented by this object. + */ + public String getName() { + String name = this.name; + if (name == null) + this.name = name = getName0(); + return name; + } + + // cache the name to reduce the number of calls into the VM + private transient String name; + private native String getName0(); + + /** + * Returns the class loader for the class. Some implementations may use + * null to represent the bootstrap class loader. This method will return + * null in such implementations if this class was loaded by the bootstrap + * class loader. + * + *+ * String.class.getName() + * returns "java.lang.String" + * byte.class.getName() + * returns "byte" + * (new Object[3]).getClass().getName() + * returns "[Ljava.lang.Object;" + * (new int[3][4][5][6][7][8][9]).getClass().getName() + * returns "[[[[[[[I" + *
If a security manager is present, and the caller's class loader is + * not null and the caller's class loader is not the same as or an ancestor of + * the class loader for the class whose class loader is requested, then + * this method calls the security manager's {@code checkPermission} + * method with a {@code RuntimePermission("getClassLoader")} + * permission to ensure it's ok to access the class loader for the class. + * + *
If this object
+ * represents a primitive type or void, null is returned.
+ *
+ * @return the class loader that loaded the class or interface
+ * represented by this object.
+ * @throws SecurityException
+ * if a security manager exists and its
+ * {@code checkPermission} method denies
+ * access to the class loader for the class.
+ * @see java.lang.ClassLoader
+ * @see SecurityManager#checkPermission
+ * @see java.lang.RuntimePermission
+ */
+ public ClassLoader getClassLoader() {
+ ClassLoader cl = getClassLoader0();
+ if (cl == null)
+ return null;
+ SecurityManager sm = System.getSecurityManager();
+ if (sm != null) {
+ ClassLoader ccl = ClassLoader.getCallerClassLoader();
+ if (ccl != null && ccl != cl && !cl.isAncestor(ccl)) {
+ sm.checkPermission(SecurityConstants.GET_CLASSLOADER_PERMISSION);
+ }
+ }
+ return cl;
+ }
+
+ // Package-private to allow ClassLoader access
+ native ClassLoader getClassLoader0();
+
+
+ /**
+ * Returns an array of {@code TypeVariable} objects that represent the
+ * type variables declared by the generic declaration represented by this
+ * {@code GenericDeclaration} object, in declaration order. Returns an
+ * array of length 0 if the underlying generic declaration declares no type
+ * variables.
+ *
+ * @return an array of {@code TypeVariable} objects that represent
+ * the type variables declared by this generic declaration
+ * @throws java.lang.reflect.GenericSignatureFormatError if the generic
+ * signature of this generic declaration does not conform to
+ * the format specified in
+ * The Java™ Virtual Machine Specification
+ * @since 1.5
+ */
+ public TypeVariable If the superclass is a parameterized type, the {@code Type}
+ * object returned must accurately reflect the actual type
+ * parameters used in the source code. The parameterized type
+ * representing the superclass is created if it had not been
+ * created before. See the declaration of {@link
+ * java.lang.reflect.ParameterizedType ParameterizedType} for the
+ * semantics of the creation process for parameterized types. If
+ * this {@code Class} represents either the {@code Object}
+ * class, an interface, a primitive type, or void, then null is
+ * returned. If this object represents an array class then the
+ * {@code Class} object representing the {@code Object} class is
+ * returned.
+ *
+ * @throws java.lang.reflect.GenericSignatureFormatError if the generic
+ * class signature does not conform to the format specified in
+ * The Java™ Virtual Machine Specification
+ * @throws TypeNotPresentException if the generic superclass
+ * refers to a non-existent type declaration
+ * @throws java.lang.reflect.MalformedParameterizedTypeException if the
+ * generic superclass refers to a parameterized type that cannot be
+ * instantiated for any reason
+ * @return the superclass of the class represented by this object
+ * @since 1.5
+ */
+ public Type getGenericSuperclass() {
+ if (getGenericSignature() != null) {
+ // Historical irregularity:
+ // Generic signature marks interfaces with superclass = Object
+ // but this API returns null for interfaces
+ if (isInterface())
+ return null;
+ return getGenericInfo().getSuperclass();
+ } else
+ return getSuperclass();
+ }
+
+ /**
+ * Gets the package for this class. The class loader of this class is used
+ * to find the package. If the class was loaded by the bootstrap class
+ * loader the set of packages loaded from CLASSPATH is searched to find the
+ * package of the class. Null is returned if no package object was created
+ * by the class loader of this class.
+ *
+ * Packages have attributes for versions and specifications only if the
+ * information was defined in the manifests that accompany the classes, and
+ * if the class loader created the package instance with the attributes
+ * from the manifest.
+ *
+ * @return the package of the class, or null if no package
+ * information is available from the archive or codebase.
+ */
+ public Package getPackage() {
+ return Package.getPackage(this);
+ }
+
+
+ /**
+ * Determines the interfaces implemented by the class or interface
+ * represented by this object.
+ *
+ * If this object represents a class, the return value is an array
+ * containing objects representing all interfaces implemented by the
+ * class. The order of the interface objects in the array corresponds to
+ * the order of the interface names in the {@code implements} clause
+ * of the declaration of the class represented by this object. For
+ * example, given the declaration:
+ * If this object represents an interface, the array contains objects
+ * representing all interfaces extended by the interface. The order of the
+ * interface objects in the array corresponds to the order of the interface
+ * names in the {@code extends} clause of the declaration of the
+ * interface represented by this object.
+ *
+ * If this object represents a class or interface that implements no
+ * interfaces, the method returns an array of length 0.
+ *
+ * If this object represents a primitive type or void, the method
+ * returns an array of length 0.
+ *
+ * @return an array of interfaces implemented by this class.
+ */
+ public native Class[] getInterfaces();
+
+ /**
+ * Returns the {@code Type}s representing the interfaces
+ * directly implemented by the class or interface represented by
+ * this object.
+ *
+ * If a superinterface is a parameterized type, the
+ * {@code Type} object returned for it must accurately reflect
+ * the actual type parameters used in the source code. The
+ * parameterized type representing each superinterface is created
+ * if it had not been created before. See the declaration of
+ * {@link java.lang.reflect.ParameterizedType ParameterizedType}
+ * for the semantics of the creation process for parameterized
+ * types.
+ *
+ * If this object represents a class, the return value is an
+ * array containing objects representing all interfaces
+ * implemented by the class. The order of the interface objects in
+ * the array corresponds to the order of the interface names in
+ * the {@code implements} clause of the declaration of the class
+ * represented by this object. In the case of an array class, the
+ * interfaces {@code Cloneable} and {@code Serializable} are
+ * returned in that order.
+ *
+ * If this object represents an interface, the array contains
+ * objects representing all interfaces directly extended by the
+ * interface. The order of the interface objects in the array
+ * corresponds to the order of the interface names in the
+ * {@code extends} clause of the declaration of the interface
+ * represented by this object.
+ *
+ * If this object represents a class or interface that
+ * implements no interfaces, the method returns an array of length
+ * 0.
+ *
+ * If this object represents a primitive type or void, the
+ * method returns an array of length 0.
+ *
+ * @throws java.lang.reflect.GenericSignatureFormatError
+ * if the generic class signature does not conform to the format
+ * specified in
+ * The Java™ Virtual Machine Specification
+ * @throws TypeNotPresentException if any of the generic
+ * superinterfaces refers to a non-existent type declaration
+ * @throws java.lang.reflect.MalformedParameterizedTypeException
+ * if any of the generic superinterfaces refer to a parameterized
+ * type that cannot be instantiated for any reason
+ * @return an array of interfaces implemented by this class
+ * @since 1.5
+ */
+ public Type[] getGenericInterfaces() {
+ if (getGenericSignature() != null)
+ return getGenericInfo().getSuperInterfaces();
+ else
+ return getInterfaces();
+ }
+
+
+ /**
+ * Returns the {@code Class} representing the component type of an
+ * array. If this class does not represent an array class this method
+ * returns null.
+ *
+ * @return the {@code Class} representing the component type of this
+ * class if this class is an array
+ * @see java.lang.reflect.Array
+ * @since JDK1.1
+ */
+ public native Class getComponentType();
+
+
+ /**
+ * Returns the Java language modifiers for this class or interface, encoded
+ * in an integer. The modifiers consist of the Java Virtual Machine's
+ * constants for {@code public}, {@code protected},
+ * {@code private}, {@code final}, {@code static},
+ * {@code abstract} and {@code interface}; they should be decoded
+ * using the methods of class {@code Modifier}.
+ *
+ * If the underlying class is an array class, then its
+ * {@code public}, {@code private} and {@code protected}
+ * modifiers are the same as those of its component type. If this
+ * {@code Class} represents a primitive type or void, its
+ * {@code public} modifier is always {@code true}, and its
+ * {@code protected} and {@code private} modifiers are always
+ * {@code false}. If this object represents an array class, a
+ * primitive type or void, then its {@code final} modifier is always
+ * {@code true} and its interface modifier is always
+ * {@code false}. The values of its other modifiers are not determined
+ * by this specification.
+ *
+ * The modifier encodings are defined in The Java Virtual Machine
+ * Specification, table 4.1.
+ *
+ * @return the {@code int} representing the modifiers for this class
+ * @see java.lang.reflect.Modifier
+ * @since JDK1.1
+ */
+ public native int getModifiers();
+
+
+ /**
+ * Gets the signers of this class.
+ *
+ * @return the signers of this class, or null if there are no signers. In
+ * particular, this method returns null if this object represents
+ * a primitive type or void.
+ * @since JDK1.1
+ */
+ public native Object[] getSigners();
+
+
+ /**
+ * Set the signers of this class.
+ */
+ native void setSigners(Object[] signers);
+
+
+ /**
+ * If this {@code Class} object represents a local or anonymous
+ * class within a method, returns a {@link
+ * java.lang.reflect.Method Method} object representing the
+ * immediately enclosing method of the underlying class. Returns
+ * {@code null} otherwise.
+ *
+ * In particular, this method returns {@code null} if the underlying
+ * class is a local or anonymous class immediately enclosed by a type
+ * declaration, instance initializer or static initializer.
+ *
+ * @return the immediately enclosing method of the underlying class, if
+ * that class is a local or anonymous class; otherwise {@code null}.
+ * @since 1.5
+ */
+ public Method getEnclosingMethod() {
+ EnclosingMethodInfo enclosingInfo = getEnclosingMethodInfo();
+
+ if (enclosingInfo == null)
+ return null;
+ else {
+ if (!enclosingInfo.isMethod())
+ return null;
+
+ MethodRepository typeInfo = MethodRepository.make(enclosingInfo.getDescriptor(),
+ getFactory());
+ Class returnType = toClass(typeInfo.getReturnType());
+ Type [] parameterTypes = typeInfo.getParameterTypes();
+ Class[] parameterClasses = new Class[parameterTypes.length];
+
+ // Convert Types to Classes; returned types *should*
+ // be class objects since the methodDescriptor's used
+ // don't have generics information
+ for(int i = 0; i < parameterClasses.length; i++)
+ parameterClasses[i] = toClass(parameterTypes[i]);
+
+ /*
+ * Loop over all declared methods; match method name,
+ * number of and type of parameters, *and* return
+ * type. Matching return type is also necessary
+ * because of covariant returns, etc.
+ */
+ for(Method m: enclosingInfo.getEnclosingClass().getDeclaredMethods()) {
+ if (m.getName().equals(enclosingInfo.getName()) ) {
+ Class[] candidateParamClasses = m.getParameterTypes();
+ if (candidateParamClasses.length == parameterClasses.length) {
+ boolean matches = true;
+ for(int i = 0; i < candidateParamClasses.length; i++) {
+ if (!candidateParamClasses[i].equals(parameterClasses[i])) {
+ matches = false;
+ break;
+ }
+ }
+
+ if (matches) { // finally, check return type
+ if (m.getReturnType().equals(returnType) )
+ return m;
+ }
+ }
+ }
+ }
+
+ throw new InternalError("Enclosing method not found");
+ }
+ }
+
+ private native Object[] getEnclosingMethod0();
+
+ private EnclosingMethodInfo getEnclosingMethodInfo() {
+ Object[] enclosingInfo = getEnclosingMethod0();
+ if (enclosingInfo == null)
+ return null;
+ else {
+ return new EnclosingMethodInfo(enclosingInfo);
+ }
+ }
+
+ private final static class EnclosingMethodInfo {
+ private Class enclosingClass;
+ private String name;
+ private String descriptor;
+
+ private EnclosingMethodInfo(Object[] enclosingInfo) {
+ if (enclosingInfo.length != 3)
+ throw new InternalError("Malformed enclosing method information");
+ try {
+ // The array is expected to have three elements:
+
+ // the immediately enclosing class
+ enclosingClass = (Class) enclosingInfo[0];
+ assert(enclosingClass != null);
+
+ // the immediately enclosing method or constructor's
+ // name (can be null).
+ name = (String) enclosingInfo[1];
+
+ // the immediately enclosing method or constructor's
+ // descriptor (null iff name is).
+ descriptor = (String) enclosingInfo[2];
+ assert((name != null && descriptor != null) || name == descriptor);
+ } catch (ClassCastException cce) {
+ throw new InternalError("Invalid type in enclosing method information");
+ }
+ }
+
+ boolean isPartial() {
+ return enclosingClass == null || name == null || descriptor == null;
+ }
+
+ boolean isConstructor() { return !isPartial() && " The simple name of an array is the simple name of the
+ * component type with "[]" appended. In particular the simple
+ * name of an array whose component type is anonymous is "[]".
+ *
+ * @return the simple name of the underlying class
+ * @since 1.5
+ */
+ public String getSimpleName() {
+ if (isArray())
+ return getComponentType().getSimpleName()+"[]";
+
+ String simpleName = getSimpleBinaryName();
+ if (simpleName == null) { // top level class
+ simpleName = getName();
+ return simpleName.substring(simpleName.lastIndexOf(".")+1); // strip the package name
+ }
+ // According to JLS3 "Binary Compatibility" (13.1) the binary
+ // name of non-package classes (not top level) is the binary
+ // name of the immediately enclosing class followed by a '$' followed by:
+ // (for nested and inner classes): the simple name.
+ // (for local classes): 1 or more digits followed by the simple name.
+ // (for anonymous classes): 1 or more digits.
+
+ // Since getSimpleBinaryName() will strip the binary name of
+ // the immediatly enclosing class, we are now looking at a
+ // string that matches the regular expression "\$[0-9]*"
+ // followed by a simple name (considering the simple of an
+ // anonymous class to be the empty string).
+
+ // Remove leading "\$[0-9]*" from the name
+ int length = simpleName.length();
+ if (length < 1 || simpleName.charAt(0) != '$')
+ throw new InternalError("Malformed class name");
+ int index = 1;
+ while (index < length && isAsciiDigit(simpleName.charAt(index)))
+ index++;
+ // Eventually, this is the empty string iff this is an anonymous class
+ return simpleName.substring(index);
+ }
+
+ /**
+ * Character.isDigit answers {@code true} to some non-ascii
+ * digits. This one does not.
+ */
+ private static boolean isAsciiDigit(char c) {
+ return '0' <= c && c <= '9';
+ }
+
+ /**
+ * Returns the canonical name of the underlying class as
+ * defined by the Java Language Specification. Returns null if
+ * the underlying class does not have a canonical name (i.e., if
+ * it is a local or anonymous class or an array whose component
+ * type does not have a canonical name).
+ * @return the canonical name of the underlying class if it exists, and
+ * {@code null} otherwise.
+ * @since 1.5
+ */
+ public String getCanonicalName() {
+ if (isArray()) {
+ String canonicalName = getComponentType().getCanonicalName();
+ if (canonicalName != null)
+ return canonicalName + "[]";
+ else
+ return null;
+ }
+ if (isLocalOrAnonymousClass())
+ return null;
+ Class enclosingClass = getEnclosingClass();
+ if (enclosingClass == null) { // top level class
+ return getName();
+ } else {
+ String enclosingName = enclosingClass.getCanonicalName();
+ if (enclosingName == null)
+ return null;
+ return enclosingName + "." + getSimpleName();
+ }
+ }
+
+ /**
+ * Returns {@code true} if and only if the underlying class
+ * is an anonymous class.
+ *
+ * @return {@code true} if and only if this class is an anonymous class.
+ * @since 1.5
+ */
+ public boolean isAnonymousClass() {
+ return "".equals(getSimpleName());
+ }
+
+ /**
+ * Returns {@code true} if and only if the underlying class
+ * is a local class.
+ *
+ * @return {@code true} if and only if this class is a local class.
+ * @since 1.5
+ */
+ public boolean isLocalClass() {
+ return isLocalOrAnonymousClass() && !isAnonymousClass();
+ }
+
+ /**
+ * Returns {@code true} if and only if the underlying class
+ * is a member class.
+ *
+ * @return {@code true} if and only if this class is a member class.
+ * @since 1.5
+ */
+ public boolean isMemberClass() {
+ return getSimpleBinaryName() != null && !isLocalOrAnonymousClass();
+ }
+
+ /**
+ * Returns the "simple binary name" of the underlying class, i.e.,
+ * the binary name without the leading enclosing class name.
+ * Returns {@code null} if the underlying class is a top level
+ * class.
+ */
+ private String getSimpleBinaryName() {
+ Class enclosingClass = getEnclosingClass();
+ if (enclosingClass == null) // top level class
+ return null;
+ // Otherwise, strip the enclosing class' name
+ try {
+ return getName().substring(enclosingClass.getName().length());
+ } catch (IndexOutOfBoundsException ex) {
+ throw new InternalError("Malformed class name");
+ }
+ }
+
+ /**
+ * Returns {@code true} if this is a local class or an anonymous
+ * class. Returns {@code false} otherwise.
+ */
+ private boolean isLocalOrAnonymousClass() {
+ // JVM Spec 4.8.6: A class must have an EnclosingMethod
+ // attribute if and only if it is a local class or an
+ // anonymous class.
+ return getEnclosingMethodInfo() != null;
+ }
+
+ /**
+ * Returns an array containing {@code Class} objects representing all
+ * the public classes and interfaces that are members of the class
+ * represented by this {@code Class} object. This includes public
+ * class and interface members inherited from superclasses and public class
+ * and interface members declared by the class. This method returns an
+ * array of length 0 if this {@code Class} object has no public member
+ * classes or interfaces. This method also returns an array of length 0 if
+ * this {@code Class} object represents a primitive type, an array
+ * class, or void.
+ *
+ * @return the array of {@code Class} objects representing the public
+ * members of this class
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ * Specifically, if this {@code Class} object represents a class,
+ * this method returns the public fields of this class and of all its
+ * superclasses. If this {@code Class} object represents an
+ * interface, this method returns the fields of this interface and of all
+ * its superinterfaces.
+ *
+ * The implicit length field for array class is not reflected by this
+ * method. User code should use the methods of class {@code Array} to
+ * manipulate arrays.
+ *
+ * See The Java Language Specification, sections 8.2 and 8.3.
+ *
+ * @return the array of {@code Field} objects representing the
+ * public fields
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ * The class initialization method {@code See The Java Language Specification, sections 8.2 and 8.4.
+ *
+ * @return the array of {@code Method} objects representing the
+ * public methods of this class
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ * The field to be reflected is determined by the algorithm that
+ * follows. Let C be the class represented by this object:
+ * See The Java Language Specification, sections 8.2 and 8.3.
+ *
+ * @param name the field name
+ * @return the {@code Field} object of this class specified by
+ * {@code name}
+ * @exception NoSuchFieldException if a field with the specified name is
+ * not found.
+ * @exception NullPointerException if {@code name} is {@code null}
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ * If the {@code name} is "{@code Note that there may be more than one matching method in a
+ * class because while the Java language forbids a class to
+ * declare multiple methods with the same signature but different
+ * return types, the Java virtual machine does not. This
+ * increased flexibility in the virtual machine can be used to
+ * implement various language features. For example, covariant
+ * returns can be implemented with {@linkplain
+ * java.lang.reflect.Method#isBridge bridge methods}; the bridge
+ * method and the method being overridden would have the same
+ * signature but different return types.
+ *
+ * See The Java Language Specification, sections 8.2 and 8.4.
+ *
+ * @param name the name of the method
+ * @param parameterTypes the list of parameters
+ * @return the {@code Method} object that matches the specified
+ * {@code name} and {@code parameterTypes}
+ * @exception NoSuchMethodException if a matching method is not found
+ * or if the name is "<init>"or "<clinit>".
+ * @exception NullPointerException if {@code name} is {@code null}
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ * The constructor to reflect is the public constructor of the class
+ * represented by this {@code Class} object whose formal parameter
+ * types match those specified by {@code parameterTypes}.
+ *
+ * @param parameterTypes the parameter array
+ * @return the {@code Constructor} object of the public constructor that
+ * matches the specified {@code parameterTypes}
+ * @exception NoSuchMethodException if a matching method is not found.
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ * See The Java Language Specification, sections 8.2 and 8.3.
+ *
+ * @return the array of {@code Field} objects representing all the
+ * declared fields of this class
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ * See The Java Language Specification, section 8.2.
+ *
+ * @return the array of {@code Method} objects representing all the
+ * declared methods of this class
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ * See The Java Language Specification, section 8.2.
+ *
+ * @return the array of {@code Constructor} objects representing all the
+ * declared constructors of this class
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ * Before delegation, an absolute resource name is constructed from the
+ * given resource name using this algorithm:
+ *
+ * Where the {@code modified_package_name} is the package name of this
+ * object with {@code '/'} substituted for {@code '.'}
+ * ('\u002e').
+ *
+ * Before delegation, an absolute resource name is constructed from the
+ * given resource name using this algorithm:
+ *
+ * Where the {@code modified_package_name} is the package name of this
+ * object with {@code '/'} substituted for {@code '.'}
+ * ('\u002e').
+ *
+ * Default policy: allow all clients access with normal Java access
+ * control.
+ */
+ private void checkMemberAccess(int which, ClassLoader ccl) {
+ SecurityManager s = System.getSecurityManager();
+ if (s != null) {
+ s.checkMemberAccess(this, which);
+ ClassLoader cl = getClassLoader0();
+ if ((ccl != null) && (ccl != cl) &&
+ ((cl == null) || !cl.isAncestor(ccl))) {
+ String name = this.getName();
+ int i = name.lastIndexOf('.');
+ if (i != -1) {
+ s.checkPackageAccess(name.substring(0, i));
+ }
+ }
+ }
+ }
+
+ /**
+ * Add a package name prefix if the name is not absolute Remove leading "/"
+ * if name is absolute
+ */
+ private String resolveName(String name) {
+ if (name == null) {
+ return name;
+ }
+ if (!name.startsWith("/")) {
+ Class c = this;
+ while (c.isArray()) {
+ c = c.getComponentType();
+ }
+ String baseName = c.getName();
+ int index = baseName.lastIndexOf('.');
+ if (index != -1) {
+ name = baseName.substring(0, index).replace('.', '/')
+ +"/"+name;
+ }
+ } else {
+ name = name.substring(1);
+ }
+ return name;
+ }
+
+ /**
+ * Reflection support.
+ */
+
+ // Caches for certain reflective results
+ private static boolean useCaches = true;
+ private volatile transient SoftReference
+ * Few programmers will have any need for this method; it is provided
+ * for the benefit of the JRE itself. (It allows a class to determine at
+ * the time that it is initialized whether assertions should be enabled.)
+ * Note that this method is not guaranteed to return the actual
+ * assertion status that was (or will be) associated with the specified
+ * class when it was (or will be) initialized.
+ *
+ * @return the desired assertion status of the specified class.
+ * @see java.lang.ClassLoader#setClassAssertionStatus
+ * @see java.lang.ClassLoader#setPackageAssertionStatus
+ * @see java.lang.ClassLoader#setDefaultAssertionStatus
+ * @since 1.4
+ */
+ public boolean desiredAssertionStatus() {
+ ClassLoader loader = getClassLoader();
+ // If the loader is null this is a system class, so ask the VM
+ if (loader == null)
+ return desiredAssertionStatus0(this);
+
+ // If the classloader has been initialized with the assertion
+ // directives, ask it. Otherwise, ask the VM.
+ synchronized(loader.assertionLock) {
+ if (loader.classAssertionStatus != null) {
+ return loader.desiredAssertionStatus(getName());
+ }
+ }
+ return desiredAssertionStatus0(this);
+ }
+
+ // Retrieves the desired assertion status of this class from the VM
+ private static native boolean desiredAssertionStatus0(Class clazz);
+
+ /**
+ * Returns true if and only if this class was declared as an enum in the
+ * source code.
+ *
+ * @return true if and only if this class was declared as an enum in the
+ * source code
+ * @since 1.5
+ */
+ public boolean isEnum() {
+ // An enum must both directly extend java.lang.Enum and have
+ // the ENUM bit set; classes for specialized enum constants
+ // don't do the former.
+ return (this.getModifiers() & ENUM) != 0 &&
+ this.getSuperclass() == java.lang.Enum.class;
+ }
+
+ // Fetches the factory for reflective objects
+ private static ReflectionFactory getReflectionFactory() {
+ if (reflectionFactory == null) {
+ reflectionFactory =
+ java.security.AccessController.doPrivileged
+ (new sun.reflect.ReflectionFactory.GetReflectionFactoryAction());
+ }
+ return reflectionFactory;
+ }
+ private static ReflectionFactory reflectionFactory;
+
+ // To be able to query system properties as soon as they're available
+ private static boolean initted = false;
+ private static void checkInitted() {
+ if (initted) return;
+ AccessController.doPrivileged(new PrivilegedAction This method is useful when a client needs to "narrow" the type of
+ * a {@code Class} object to pass it to an API that restricts the
+ * {@code Class} objects that it is willing to accept. A cast would
+ * generate a compile-time warning, as the correctness of the cast
+ * could not be checked at runtime (because generic types are implemented
+ * by erasure).
+ *
+ * @return this {@code Class} object, cast to represent a subclass of
+ * the specified class object.
+ * @throws ClassCastException if this {@code Class} object does not
+ * represent a subclass of the specified class (here "subclass" includes
+ * the class itself).
+ * @since 1.5
+ */
+ public Class asSubclass(Class clazz) {
+ if (clazz.isAssignableFrom(this))
+ return (Class) this;
+ else
+ throw new ClassCastException(this.toString());
+ }
+
+ /**
+ * @throws NullPointerException {@inheritDoc}
+ * @since 1.5
+ */
+ public A getAnnotation(Class annotationClass) {
+ if (annotationClass == null)
+ throw new NullPointerException();
+
+ initAnnotationsIfNecessary();
+ return (A) annotations.get(annotationClass);
+ }
+
+ /**
+ * @throws NullPointerException {@inheritDoc}
+ * @since 1.5
+ */
+ public boolean isAnnotationPresent(
+ Class annotationClass) {
+ if (annotationClass == null)
+ throw new NullPointerException();
+
+ return getAnnotation(annotationClass) != null;
+ }
+
+
+ /**
+ * @since 1.5
+ */
+ public Annotation[] getAnnotations() {
+ initAnnotationsIfNecessary();
+ return AnnotationParser.toArray(annotations);
+ }
+
+ /**
+ * @since 1.5
+ */
+ public Annotation[] getDeclaredAnnotations() {
+ initAnnotationsIfNecessary();
+ return AnnotationParser.toArray(declaredAnnotations);
+ }
+
+ // Annotations cache
+ private transient Map
+ * {@code class Shimmer implements FloorWax, DessertTopping { ... }}
+ *
+ * suppose the value of {@code s} is an instance of
+ * {@code Shimmer}; the value of the expression:
+ *
+ * {@code s.getClass().getInterfaces()[0]}
+ *
+ * is the {@code Class} object that represents interface
+ * {@code FloorWax}; and the value of:
+ *
+ * {@code s.getClass().getInterfaces()[1]}
+ *
+ * is the {@code Class} object that represents interface
+ * {@code DessertTopping}.
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Class[] getClasses() {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.PUBLIC, ClassLoader.getCallerClassLoader());
+
+ // Privileged so this implementation can look at DECLARED classes,
+ // something the caller might not have privilege to do. The code here
+ // is allowed to look at DECLARED classes because (1) it does not hand
+ // out anything other than public members and (2) public member access
+ // has already been ok'd by the SecurityManager.
+
+ return java.security.AccessController.doPrivileged(
+ new java.security.PrivilegedAction
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Field[] getFields() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.PUBLIC, ClassLoader.getCallerClassLoader());
+ return copyFields(privateGetPublicFields(null));
+ }
+
+
+ /**
+ * Returns an array containing {@code Method} objects reflecting all
+ * the public member methods of the class or interface represented
+ * by this {@code Class} object, including those declared by the class
+ * or interface and those inherited from superclasses and
+ * superinterfaces. Array classes return all the (public) member methods
+ * inherited from the {@code Object} class. The elements in the array
+ * returned are not sorted and are not in any particular order. This
+ * method returns an array of length 0 if this {@code Class} object
+ * represents a class or interface that has no public member methods, or if
+ * this {@code Class} object represents a primitive type or void.
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Method[] getMethods() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.PUBLIC, ClassLoader.getCallerClassLoader());
+ return copyMethods(privateGetPublicMethods());
+ }
+
+
+ /**
+ * Returns an array containing {@code Constructor} objects reflecting
+ * all the public constructors of the class represented by this
+ * {@code Class} object. An array of length 0 is returned if the
+ * class has no public constructors, or if the class is an array class, or
+ * if the class reflects a primitive type or void.
+ *
+ * Note that while this method returns an array of {@code
+ * Constructor
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Constructor[] getConstructors() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.PUBLIC, ClassLoader.getCallerClassLoader());
+ return copyConstructors(privateGetDeclaredConstructors(true));
+ }
+
+
+ /**
+ * Returns a {@code Field} object that reflects the specified public
+ * member field of the class or interface represented by this
+ * {@code Class} object. The {@code name} parameter is a
+ * {@code String} specifying the simple name of the desired field.
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Field getField(String name)
+ throws NoSuchFieldException, SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.PUBLIC, ClassLoader.getCallerClassLoader());
+ Field field = getField0(name);
+ if (field == null) {
+ throw new NoSuchFieldException(name);
+ }
+ return field;
+ }
+
+
+ /**
+ * Returns a {@code Method} object that reflects the specified public
+ * member method of the class or interface represented by this
+ * {@code Class} object. The {@code name} parameter is a
+ * {@code String} specifying the simple name of the desired method. The
+ * {@code parameterTypes} parameter is an array of {@code Class}
+ * objects that identify the method's formal parameter types, in declared
+ * order. If {@code parameterTypes} is {@code null}, it is
+ * treated as if it were an empty array.
+ *
+ *
+ *
+ *
+ * To find a matching method in a class C: If C declares exactly one
+ * public method with the specified name and exactly the same formal
+ * parameter types, that is the method reflected. If more than one such
+ * method is found in C, and one of these methods has a return type that is
+ * more specific than any of the others, that method is reflected;
+ * otherwise one of the methods is chosen arbitrarily.
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Method getMethod(String name, Class... parameterTypes)
+ throws NoSuchMethodException, SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.PUBLIC, ClassLoader.getCallerClassLoader());
+ Method method = getMethod0(name, parameterTypes);
+ if (method == null) {
+ throw new NoSuchMethodException(getName() + "." + name + argumentTypesToString(parameterTypes));
+ }
+ return method;
+ }
+
+
+ /**
+ * Returns a {@code Constructor} object that reflects the specified
+ * public constructor of the class represented by this {@code Class}
+ * object. The {@code parameterTypes} parameter is an array of
+ * {@code Class} objects that identify the constructor's formal
+ * parameter types, in declared order.
+ *
+ * If this {@code Class} object represents an inner class
+ * declared in a non-static context, the formal parameter types
+ * include the explicit enclosing instance as the first parameter.
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Constructor
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Class[] getDeclaredClasses() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.DECLARED, ClassLoader.getCallerClassLoader());
+ return getDeclaredClasses0();
+ }
+
+
+ /**
+ * Returns an array of {@code Field} objects reflecting all the fields
+ * declared by the class or interface represented by this
+ * {@code Class} object. This includes public, protected, default
+ * (package) access, and private fields, but excludes inherited fields.
+ * The elements in the array returned are not sorted and are not in any
+ * particular order. This method returns an array of length 0 if the class
+ * or interface declares no fields, or if this {@code Class} object
+ * represents a primitive type, an array class, or void.
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Field[] getDeclaredFields() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.DECLARED, ClassLoader.getCallerClassLoader());
+ return copyFields(privateGetDeclaredFields(false));
+ }
+
+
+ /**
+ * Returns an array of {@code Method} objects reflecting all the
+ * methods declared by the class or interface represented by this
+ * {@code Class} object. This includes public, protected, default
+ * (package) access, and private methods, but excludes inherited methods.
+ * The elements in the array returned are not sorted and are not in any
+ * particular order. This method returns an array of length 0 if the class
+ * or interface declares no methods, or if this {@code Class} object
+ * represents a primitive type, an array class, or void. The class
+ * initialization method {@code
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Method[] getDeclaredMethods() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.DECLARED, ClassLoader.getCallerClassLoader());
+ return copyMethods(privateGetDeclaredMethods(false));
+ }
+
+
+ /**
+ * Returns an array of {@code Constructor} objects reflecting all the
+ * constructors declared by the class represented by this
+ * {@code Class} object. These are public, protected, default
+ * (package) access, and private constructors. The elements in the array
+ * returned are not sorted and are not in any particular order. If the
+ * class has a default constructor, it is included in the returned array.
+ * This method returns an array of length 0 if this {@code Class}
+ * object represents an interface, a primitive type, an array class, or
+ * void.
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Constructor[] getDeclaredConstructors() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.DECLARED, ClassLoader.getCallerClassLoader());
+ return copyConstructors(privateGetDeclaredConstructors(false));
+ }
+
+
+ /**
+ * Returns a {@code Field} object that reflects the specified declared
+ * field of the class or interface represented by this {@code Class}
+ * object. The {@code name} parameter is a {@code String} that
+ * specifies the simple name of the desired field. Note that this method
+ * will not reflect the {@code length} field of an array class.
+ *
+ * @param name the name of the field
+ * @return the {@code Field} object for the specified field in this
+ * class
+ * @exception NoSuchFieldException if a field with the specified name is
+ * not found.
+ * @exception NullPointerException if {@code name} is {@code null}
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Field getDeclaredField(String name)
+ throws NoSuchFieldException, SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.DECLARED, ClassLoader.getCallerClassLoader());
+ Field field = searchFields(privateGetDeclaredFields(false), name);
+ if (field == null) {
+ throw new NoSuchFieldException(name);
+ }
+ return field;
+ }
+
+
+ /**
+ * Returns a {@code Method} object that reflects the specified
+ * declared method of the class or interface represented by this
+ * {@code Class} object. The {@code name} parameter is a
+ * {@code String} that specifies the simple name of the desired
+ * method, and the {@code parameterTypes} parameter is an array of
+ * {@code Class} objects that identify the method's formal parameter
+ * types, in declared order. If more than one method with the same
+ * parameter types is declared in a class, and one of these methods has a
+ * return type that is more specific than any of the others, that method is
+ * returned; otherwise one of the methods is chosen arbitrarily. If the
+ * name is "<init>"or "<clinit>" a {@code NoSuchMethodException}
+ * is raised.
+ *
+ * @param name the name of the method
+ * @param parameterTypes the parameter array
+ * @return the {@code Method} object for the method of this class
+ * matching the specified name and parameters
+ * @exception NoSuchMethodException if a matching method is not found.
+ * @exception NullPointerException if {@code name} is {@code null}
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Method getDeclaredMethod(String name, Class... parameterTypes)
+ throws NoSuchMethodException, SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.DECLARED, ClassLoader.getCallerClassLoader());
+ Method method = searchMethods(privateGetDeclaredMethods(false), name, parameterTypes);
+ if (method == null) {
+ throw new NoSuchMethodException(getName() + "." + name + argumentTypesToString(parameterTypes));
+ }
+ return method;
+ }
+
+
+ /**
+ * Returns a {@code Constructor} object that reflects the specified
+ * constructor of the class or interface represented by this
+ * {@code Class} object. The {@code parameterTypes} parameter is
+ * an array of {@code Class} objects that identify the constructor's
+ * formal parameter types, in declared order.
+ *
+ * If this {@code Class} object represents an inner class
+ * declared in a non-static context, the formal parameter types
+ * include the explicit enclosing instance as the first parameter.
+ *
+ * @param parameterTypes the parameter array
+ * @return The {@code Constructor} object for the constructor with the
+ * specified parameter list
+ * @exception NoSuchMethodException if a matching method is not found.
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Constructor
+ *
+ *
+ *
+ * @param name name of the desired resource
+ * @return A {@link java.io.InputStream} object or {@code null} if
+ * no resource with this name is found
+ * @throws NullPointerException If {@code name} is {@code null}
+ * @since JDK1.1
+ */
+ public InputStream getResourceAsStream(String name) {
+ name = resolveName(name);
+ ClassLoader cl = getClassLoader0();
+ if (cl==null) {
+ // A system class.
+ return ClassLoader.getSystemResourceAsStream(name);
+ }
+ return cl.getResourceAsStream(name);
+ }
+
+ /**
+ * Finds a resource with a given name. The rules for searching resources
+ * associated with a given class are implemented by the defining
+ * {@linkplain ClassLoader class loader} of the class. This method
+ * delegates to this object's class loader. If this object was loaded by
+ * the bootstrap class loader, the method delegates to {@link
+ * ClassLoader#getSystemResource}.
+ *
+ *
+ * {@code modified_package_name/name}
+ *
+ *
+ *
+ *
+ *
+ *
+ * @param name name of the desired resource
+ * @return A {@link java.net.URL} object or {@code null} if no
+ * resource with this name is found
+ * @since JDK1.1
+ */
+ public java.net.URL getResource(String name) {
+ name = resolveName(name);
+ ClassLoader cl = getClassLoader0();
+ if (cl==null) {
+ // A system class.
+ return ClassLoader.getSystemResource(name);
+ }
+ return cl.getResource(name);
+ }
+
+
+
+ /** protection domain returned when the internal domain is null */
+ private static java.security.ProtectionDomain allPermDomain;
+
+
+ /**
+ * Returns the {@code ProtectionDomain} of this class. If there is a
+ * security manager installed, this method first calls the security
+ * manager's {@code checkPermission} method with a
+ * {@code RuntimePermission("getProtectionDomain")} permission to
+ * ensure it's ok to get the
+ * {@code ProtectionDomain}.
+ *
+ * @return the ProtectionDomain of this class
+ *
+ * @throws SecurityException
+ * if a security manager exists and its
+ * {@code checkPermission} method doesn't allow
+ * getting the ProtectionDomain.
+ *
+ * @see java.security.ProtectionDomain
+ * @see SecurityManager#checkPermission
+ * @see java.lang.RuntimePermission
+ * @since 1.2
+ */
+ public java.security.ProtectionDomain getProtectionDomain() {
+ SecurityManager sm = System.getSecurityManager();
+ if (sm != null) {
+ sm.checkPermission(SecurityConstants.GET_PD_PERMISSION);
+ }
+ java.security.ProtectionDomain pd = getProtectionDomain0();
+ if (pd == null) {
+ if (allPermDomain == null) {
+ java.security.Permissions perms =
+ new java.security.Permissions();
+ perms.add(SecurityConstants.ALL_PERMISSION);
+ allPermDomain =
+ new java.security.ProtectionDomain(null, perms);
+ }
+ pd = allPermDomain;
+ }
+ return pd;
+ }
+
+
+ /**
+ * Returns the ProtectionDomain of this class.
+ */
+ private native java.security.ProtectionDomain getProtectionDomain0();
+
+
+ /**
+ * Set the ProtectionDomain for this class. Called by
+ * ClassLoader.defineClass.
+ */
+ native void setProtectionDomain0(java.security.ProtectionDomain pd);
+
+
+ /*
+ * Return the Virtual Machine's Class object for the named
+ * primitive type.
+ */
+ static native Class getPrimitiveClass(String name);
+
+
+ /*
+ * Check if client is allowed to access members. If access is denied,
+ * throw a SecurityException.
+ *
+ * Be very careful not to change the stack depth of this checkMemberAccess
+ * call for security reasons.
+ * See java.lang.SecurityManager.checkMemberAccess.
+ *
+ *
+ * {@code modified_package_name/name}
+ *
+ *
+ *
+ * {@code TC_CLASS} ClassDescriptor
+ * A ClassDescriptor is a special cased serialization of
+ * a {@code java.io.ObjectStreamClass} instance.
+ *
+ * A new handle is generated for the initial time the class descriptor
+ * is written into the stream. Future references to the class descriptor
+ * are written as references to the initial class descriptor instance.
+ *
+ * @see java.io.ObjectStreamClass
+ */
+ private static final ObjectStreamField[] serialPersistentFields =
+ new ObjectStreamField[0];
+
+
+ /**
+ * Returns the assertion status that would be assigned to this
+ * class if it were to be initialized at the time this method is invoked.
+ * If this class has had its assertion status set, the most recent
+ * setting will be returned; otherwise, if any package default assertion
+ * status pertains to this class, the most recent setting for the most
+ * specific pertinent package default assertion status is returned;
+ * otherwise, if this class is not a system class (i.e., it has a
+ * class loader) its class loader's default assertion status is returned;
+ * otherwise, the system class default assertion status is returned.
+ *