/*

  * Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 package java.lang.reflect;

 import java.lang.annotation.Annotation;

 /**

  * A {@code Field} provides information about, and dynamic access to, a

  * single field of a class or an interface.  The reflected field may

  * be a class (static) field or an instance field.

  *

  * <p>A {@code Field} permits widening conversions to occur during a get or

  * set access operation, but throws an {@code IllegalArgumentException} if a

  * narrowing conversion would occur.

  *

  * @see Member

  * @see java.lang.Class

  * @see java.lang.Class#getFields()

  * @see java.lang.Class#getField(String)

  * @see java.lang.Class#getDeclaredFields()

  * @see java.lang.Class#getDeclaredField(String)

  *

  * @author Kenneth Russell

  * @author Nakul Saraiya

  */

 public final

 class Field extends AccessibleObject implements Member {

     private Class<?>            clazz;

     private int                 slot;

     // This is guaranteed to be interned by the VM in the 1.4

     // reflection implementation

     private String              name;

     private Class<?>            type;

     private int                 modifiers;

     // Generics and annotations support

     private transient String    signature;

     private byte[]              annotations;

     // For sharing of FieldAccessors. This branching structure is

     // currently only two levels deep (i.e., one root Field and

     // potentially many Field objects pointing to it.)

     private Field               root;

     // Generics infrastructure

     private String getGenericSignature() {return signature;}

     /**

      * Package-private constructor used by ReflectAccess to enable

      * instantiation of these objects in Java code from the java.lang

      * package via sun.reflect.LangReflectAccess.

      */

     Field(Class<?> declaringClass,

           String name,

           Class<?> type,

           int modifiers,

           int slot,

           String signature,

           byte[] annotations)

     {

         this.clazz = declaringClass;

         this.name = name;

         this.type = type;

         this.modifiers = modifiers;

         this.slot = slot;

         this.signature = signature;

         this.annotations = annotations;

     }

     /**

      * Package-private routine (exposed to java.lang.Class via

      * ReflectAccess) which returns a copy of this Field. The copy's

      * "root" field points to this Field.

      */

     Field copy() {

         // This routine enables sharing of FieldAccessor objects

         // among Field objects which refer to the same underlying

         // method in the VM. (All of this contortion is only necessary

         // because of the "accessibility" bit in AccessibleObject,

         // which implicitly requires that new java.lang.reflect

         // objects be fabricated for each reflective call on Class

         // objects.)

         Field res = new Field(clazz, name, type, modifiers, slot, signature, annotations);

         res.root = this;

         return res;

     }

     /**

      * Returns the {@code Class} object representing the class or interface

      * that declares the field represented by this {@code Field} object.

      */

     public Class<?> getDeclaringClass() {

         return clazz;

     }

     /**

      * Returns the name of the field represented by this {@code Field} object.

      */

     public String getName() {

         return name;

     }

     /**

      * Returns the Java language modifiers for the field represented

      * by this {@code Field} object, as an integer. The {@code Modifier} class should

      * be used to decode the modifiers.

      *

      * @see Modifier

      */

     public int getModifiers() {

         return modifiers;

     }

     /**

      * Returns {@code true} if this field represents an element of

      * an enumerated type; returns {@code false} otherwise.

      *

      * @return {@code true} if and only if this field represents an element of

      * an enumerated type.

      * @since 1.5

      */

     public boolean isEnumConstant() {

         return (getModifiers() & Modifier.ENUM) != 0;

     }

     /**

      * Returns {@code true} if this field is a synthetic

      * field; returns {@code false} otherwise.

      *

      * @return true if and only if this field is a synthetic

      * field as defined by the Java Language Specification.

      * @since 1.5

      */

     public boolean isSynthetic() {

         return Modifier.isSynthetic(getModifiers());

     }

     /**

      * Returns a {@code Class} object that identifies the

      * declared type for the field represented by this

      * {@code Field} object.

      *

      * @return a {@code Class} object identifying the declared

      * type of the field represented by this object

      */

     public Class<?> getType() {

         return type;

     }

     /**

      * Returns a {@code Type} object that represents the declared type for

      * the field represented by this {@code Field} object.

      *

      * <p>If the {@code Type} is a parameterized type, the

      * {@code Type} object returned must accurately reflect the

      * actual type parameters used in the source code.

      *

      * <p>If the type of the underlying field is a type variable or a

      * parameterized type, it is created. Otherwise, it is resolved.

      *

      * @return a {@code Type} object that represents the declared type for

      *     the field represented by this {@code Field} object

      * @throws GenericSignatureFormatError if the generic field

      *     signature does not conform to the format specified in

      *     <cite>The Java&trade; Virtual Machine Specification</cite>

      * @throws TypeNotPresentException if the generic type

      *     signature of the underlying field refers to a non-existent

      *     type declaration

      * @throws MalformedParameterizedTypeException if the generic

      *     signature of the underlying field refers to a parameterized type

      *     that cannot be instantiated for any reason

      * @since 1.5

      */

     public Type getGenericType() {

         throw new UnsupportedOperationException();

     }

     /**

      * Compares this {@code Field} against the specified object.  Returns

      * true if the objects are the same.  Two {@code Field} objects are the same if

      * they were declared by the same class and have the same name

      * and type.

      */

     public boolean equals(Object obj) {

         if (obj != null && obj instanceof Field) {

             Field other = (Field)obj;

             return (getDeclaringClass() == other.getDeclaringClass())

                 && (getName() == other.getName())

                 && (getType() == other.getType());

         }

         return false;

     }

     /**

      * Returns a hashcode for this {@code Field}.  This is computed as the

      * exclusive-or of the hashcodes for the underlying field's

      * declaring class name and its name.

      */

     public int hashCode() {

         return getDeclaringClass().getName().hashCode() ^ getName().hashCode();

     }

     /**

      * Returns a string describing this {@code Field}.  The format is

      * the access modifiers for the field, if any, followed

      * by the field type, followed by a space, followed by

      * the fully-qualified name of the class declaring the field,

      * followed by a period, followed by the name of the field.

      * For example:

      * <pre>

      *    public static final int java.lang.Thread.MIN_PRIORITY

      *    private int java.io.FileDescriptor.fd

      * </pre>

      *

      * <p>The modifiers are placed in canonical order as specified by

      * "The Java Language Specification".  This is {@code public},

      * {@code protected} or {@code private} first, and then other

      * modifiers in the following order: {@code static}, {@code final},

      * {@code transient}, {@code volatile}.

      */

     public String toString() {

         int mod = getModifiers();

         return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))

             + getTypeName(getType()) + " "

             + getTypeName(getDeclaringClass()) + "."

             + getName());

     }

     /**

      * Returns a string describing this {@code Field}, including

      * its generic type.  The format is the access modifiers for the

      * field, if any, followed by the generic field type, followed by

      * a space, followed by the fully-qualified name of the class

      * declaring the field, followed by a period, followed by the name

      * of the field.

      *

      * <p>The modifiers are placed in canonical order as specified by

      * "The Java Language Specification".  This is {@code public},

      * {@code protected} or {@code private} first, and then other

      * modifiers in the following order: {@code static}, {@code final},

      * {@code transient}, {@code volatile}.

      *

      * @return a string describing this {@code Field}, including

      * its generic type

      *

      * @since 1.5

      */

     public String toGenericString() {

         int mod = getModifiers();

         Type fieldType = getGenericType();

         return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))

             +  ((fieldType instanceof Class) ?

                 getTypeName((Class)fieldType): fieldType.toString())+ " "

             + getTypeName(getDeclaringClass()) + "."

             + getName());

     }

     /**

      * Returns the value of the field represented by this {@code Field}, on

      * the specified object. The value is automatically wrapped in an

      * object if it has a primitive type.

      *

      * <p>The underlying field's value is obtained as follows:

      *

      * <p>If the underlying field is a static field, the {@code obj} argument

      * is ignored; it may be null.

      *

      * <p>Otherwise, the underlying field is an instance field.  If the

      * specified {@code obj} argument is null, the method throws a

      * {@code NullPointerException}. If the specified object is not an

      * instance of the class or interface declaring the underlying

      * field, the method throws an {@code IllegalArgumentException}.

      *

      * <p>If this {@code Field} object is enforcing Java language access control, and

      * the underlying field is inaccessible, the method throws an

      * {@code IllegalAccessException}.

      * If the underlying field is static, the class that declared the

      * field is initialized if it has not already been initialized.

      *

      * <p>Otherwise, the value is retrieved from the underlying instance

      * or static field.  If the field has a primitive type, the value

      * is wrapped in an object before being returned, otherwise it is

      * returned as is.

      *

      * <p>If the field is hidden in the type of {@code obj},

      * the field's value is obtained according to the preceding rules.

      *

      * @param obj object from which the represented field's value is

      * to be extracted

      * @return the value of the represented field in object

      * {@code obj}; primitive values are wrapped in an appropriate

      * object before being returned

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is inaccessible.

      * @exception IllegalArgumentException  if the specified object is not an

      *              instance of the class or interface declaring the underlying

      *              field (or a subclass or implementor thereof).

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      */

     public Object get(Object obj)

         throws IllegalArgumentException, IllegalAccessException

     {

         return getFieldAccessor(obj).get(obj);

     }

     /**

      * Gets the value of a static or instance {@code boolean} field.

      *

      * @param obj the object to extract the {@code boolean} value

      * from

      * @return the value of the {@code boolean} field

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is inaccessible.

      * @exception IllegalArgumentException  if the specified object is not

      *              an instance of the class or interface declaring the

      *              underlying field (or a subclass or implementor

      *              thereof), or if the field value cannot be

      *              converted to the type {@code boolean} by a

      *              widening conversion.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#get

      */

     public boolean getBoolean(Object obj)

         throws IllegalArgumentException, IllegalAccessException

     {

         return getFieldAccessor(obj).getBoolean(obj);

     }

     /**

      * Gets the value of a static or instance {@code byte} field.

      *

      * @param obj the object to extract the {@code byte} value

      * from

      * @return the value of the {@code byte} field

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is inaccessible.

      * @exception IllegalArgumentException  if the specified object is not

      *              an instance of the class or interface declaring the

      *              underlying field (or a subclass or implementor

      *              thereof), or if the field value cannot be

      *              converted to the type {@code byte} by a

      *              widening conversion.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#get

      */

     public byte getByte(Object obj)

         throws IllegalArgumentException, IllegalAccessException

     {

         return getFieldAccessor(obj).getByte(obj);

     }

     /**

      * Gets the value of a static or instance field of type

      * {@code char} or of another primitive type convertible to

      * type {@code char} via a widening conversion.

      *

      * @param obj the object to extract the {@code char} value

      * from

      * @return the value of the field converted to type {@code char}

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is inaccessible.

      * @exception IllegalArgumentException  if the specified object is not

      *              an instance of the class or interface declaring the

      *              underlying field (or a subclass or implementor

      *              thereof), or if the field value cannot be

      *              converted to the type {@code char} by a

      *              widening conversion.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see Field#get

      */

     public char getChar(Object obj)

         throws IllegalArgumentException, IllegalAccessException

     {

         return getFieldAccessor(obj).getChar(obj);

     }

     /**

      * Gets the value of a static or instance field of type

      * {@code short} or of another primitive type convertible to

      * type {@code short} via a widening conversion.

      *

      * @param obj the object to extract the {@code short} value

      * from

      * @return the value of the field converted to type {@code short}

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is inaccessible.

      * @exception IllegalArgumentException  if the specified object is not

      *              an instance of the class or interface declaring the

      *              underlying field (or a subclass or implementor

      *              thereof), or if the field value cannot be

      *              converted to the type {@code short} by a

      *              widening conversion.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#get

      */

     public short getShort(Object obj)

         throws IllegalArgumentException, IllegalAccessException

     {

         return getFieldAccessor(obj).getShort(obj);

     }

     /**

      * Gets the value of a static or instance field of type

      * {@code int} or of another primitive type convertible to

      * type {@code int} via a widening conversion.

      *

      * @param obj the object to extract the {@code int} value

      * from

      * @return the value of the field converted to type {@code int}

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is inaccessible.

      * @exception IllegalArgumentException  if the specified object is not

      *              an instance of the class or interface declaring the

      *              underlying field (or a subclass or implementor

      *              thereof), or if the field value cannot be

      *              converted to the type {@code int} by a

      *              widening conversion.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#get

      */

     public int getInt(Object obj)

         throws IllegalArgumentException, IllegalAccessException

     {

         return getFieldAccessor(obj).getInt(obj);

     }

     /**

      * Gets the value of a static or instance field of type

      * {@code long} or of another primitive type convertible to

      * type {@code long} via a widening conversion.

      *

      * @param obj the object to extract the {@code long} value

      * from

      * @return the value of the field converted to type {@code long}

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is inaccessible.

      * @exception IllegalArgumentException  if the specified object is not

      *              an instance of the class or interface declaring the

      *              underlying field (or a subclass or implementor

      *              thereof), or if the field value cannot be

      *              converted to the type {@code long} by a

      *              widening conversion.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#get

      */

     public long getLong(Object obj)

         throws IllegalArgumentException, IllegalAccessException

     {

         return getFieldAccessor(obj).getLong(obj);

     }

     /**

      * Gets the value of a static or instance field of type

      * {@code float} or of another primitive type convertible to

      * type {@code float} via a widening conversion.

      *

      * @param obj the object to extract the {@code float} value

      * from

      * @return the value of the field converted to type {@code float}

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is inaccessible.

      * @exception IllegalArgumentException  if the specified object is not

      *              an instance of the class or interface declaring the

      *              underlying field (or a subclass or implementor

      *              thereof), or if the field value cannot be

      *              converted to the type {@code float} by a

      *              widening conversion.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see Field#get

      */

     public float getFloat(Object obj)

         throws IllegalArgumentException, IllegalAccessException

     {

         return getFieldAccessor(obj).getFloat(obj);

     }

     /**

      * Gets the value of a static or instance field of type

      * {@code double} or of another primitive type convertible to

      * type {@code double} via a widening conversion.

      *

      * @param obj the object to extract the {@code double} value

      * from

      * @return the value of the field converted to type {@code double}

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is inaccessible.

      * @exception IllegalArgumentException  if the specified object is not

      *              an instance of the class or interface declaring the

      *              underlying field (or a subclass or implementor

      *              thereof), or if the field value cannot be

      *              converted to the type {@code double} by a

      *              widening conversion.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#get

      */

     public double getDouble(Object obj)

         throws IllegalArgumentException, IllegalAccessException

     {

         return getFieldAccessor(obj).getDouble(obj);

     }

     /**

      * Sets the field represented by this {@code Field} object on the

      * specified object argument to the specified new value. The new

      * value is automatically unwrapped if the underlying field has a

      * primitive type.

      *

      * <p>The operation proceeds as follows:

      *

      * <p>If the underlying field is static, the {@code obj} argument is

      * ignored; it may be null.

      *

      * <p>Otherwise the underlying field is an instance field.  If the

      * specified object argument is null, the method throws a

      * {@code NullPointerException}.  If the specified object argument is not

      * an instance of the class or interface declaring the underlying

      * field, the method throws an {@code IllegalArgumentException}.

      *

      * <p>If this {@code Field} object is enforcing Java language access control, and

      * the underlying field is inaccessible, the method throws an

      * {@code IllegalAccessException}.

      *

      * <p>If the underlying field is final, the method throws an

      * {@code IllegalAccessException} unless {@code setAccessible(true)}

      * has succeeded for this {@code Field} object

      * and the field is non-static. Setting a final field in this way

      * is meaningful only during deserialization or reconstruction of

      * instances of classes with blank final fields, before they are

      * made available for access by other parts of a program. Use in

      * any other context may have unpredictable effects, including cases

      * in which other parts of a program continue to use the original

      * value of this field.

      *

      * <p>If the underlying field is of a primitive type, an unwrapping

      * conversion is attempted to convert the new value to a value of

      * a primitive type.  If this attempt fails, the method throws an

      * {@code IllegalArgumentException}.

      *

      * <p>If, after possible unwrapping, the new value cannot be

      * converted to the type of the underlying field by an identity or

      * widening conversion, the method throws an

      * {@code IllegalArgumentException}.

      *

      * <p>If the underlying field is static, the class that declared the

      * field is initialized if it has not already been initialized.

      *

      * <p>The field is set to the possibly unwrapped and widened new value.

      *

      * <p>If the field is hidden in the type of {@code obj},

      * the field's value is set according to the preceding rules.

      *

      * @param obj the object whose field should be modified

      * @param value the new value for the field of {@code obj}

      * being modified

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is either inaccessible or final.

      * @exception IllegalArgumentException  if the specified object is not an

      *              instance of the class or interface declaring the underlying

      *              field (or a subclass or implementor thereof),

      *              or if an unwrapping conversion fails.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      */

     public void set(Object obj, Object value)

         throws IllegalArgumentException, IllegalAccessException

     {

         getFieldAccessor(obj).set(obj, value);

     }

     /**

      * Sets the value of a field as a {@code boolean} on the specified object.

      * This method is equivalent to

      * {@code set(obj, zObj)},

      * where {@code zObj} is a {@code Boolean} object and

      * {@code zObj.booleanValue() == z}.

      *

      * @param obj the object whose field should be modified

      * @param z   the new value for the field of {@code obj}

      * being modified

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is either inaccessible or final.

      * @exception IllegalArgumentException  if the specified object is not an

      *              instance of the class or interface declaring the underlying

      *              field (or a subclass or implementor thereof),

      *              or if an unwrapping conversion fails.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#set

      */

     public void setBoolean(Object obj, boolean z)

         throws IllegalArgumentException, IllegalAccessException

     {

         getFieldAccessor(obj).setBoolean(obj, z);

     }

     /**

      * Sets the value of a field as a {@code byte} on the specified object.

      * This method is equivalent to

      * {@code set(obj, bObj)},

      * where {@code bObj} is a {@code Byte} object and

      * {@code bObj.byteValue() == b}.

      *

      * @param obj the object whose field should be modified

      * @param b   the new value for the field of {@code obj}

      * being modified

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is either inaccessible or final.

      * @exception IllegalArgumentException  if the specified object is not an

      *              instance of the class or interface declaring the underlying

      *              field (or a subclass or implementor thereof),

      *              or if an unwrapping conversion fails.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#set

      */

     public void setByte(Object obj, byte b)

         throws IllegalArgumentException, IllegalAccessException

     {

         getFieldAccessor(obj).setByte(obj, b);

     }

     /**

      * Sets the value of a field as a {@code char} on the specified object.

      * This method is equivalent to

      * {@code set(obj, cObj)},

      * where {@code cObj} is a {@code Character} object and

      * {@code cObj.charValue() == c}.

      *

      * @param obj the object whose field should be modified

      * @param c   the new value for the field of {@code obj}

      * being modified

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is either inaccessible or final.

      * @exception IllegalArgumentException  if the specified object is not an

      *              instance of the class or interface declaring the underlying

      *              field (or a subclass or implementor thereof),

      *              or if an unwrapping conversion fails.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#set

      */

     public void setChar(Object obj, char c)

         throws IllegalArgumentException, IllegalAccessException

     {

         getFieldAccessor(obj).setChar(obj, c);

     }

     /**

      * Sets the value of a field as a {@code short} on the specified object.

      * This method is equivalent to

      * {@code set(obj, sObj)},

      * where {@code sObj} is a {@code Short} object and

      * {@code sObj.shortValue() == s}.

      *

      * @param obj the object whose field should be modified

      * @param s   the new value for the field of {@code obj}

      * being modified

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is either inaccessible or final.

      * @exception IllegalArgumentException  if the specified object is not an

      *              instance of the class or interface declaring the underlying

      *              field (or a subclass or implementor thereof),

      *              or if an unwrapping conversion fails.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#set

      */

     public void setShort(Object obj, short s)

         throws IllegalArgumentException, IllegalAccessException

     {

         getFieldAccessor(obj).setShort(obj, s);

     }

     /**

      * Sets the value of a field as an {@code int} on the specified object.

      * This method is equivalent to

      * {@code set(obj, iObj)},

      * where {@code iObj} is a {@code Integer} object and

      * {@code iObj.intValue() == i}.

      *

      * @param obj the object whose field should be modified

      * @param i   the new value for the field of {@code obj}

      * being modified

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is either inaccessible or final.

      * @exception IllegalArgumentException  if the specified object is not an

      *              instance of the class or interface declaring the underlying

      *              field (or a subclass or implementor thereof),

      *              or if an unwrapping conversion fails.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#set

      */

     public void setInt(Object obj, int i)

         throws IllegalArgumentException, IllegalAccessException

     {

         getFieldAccessor(obj).setInt(obj, i);

     }

     /**

      * Sets the value of a field as a {@code long} on the specified object.

      * This method is equivalent to

      * {@code set(obj, lObj)},

      * where {@code lObj} is a {@code Long} object and

      * {@code lObj.longValue() == l}.

      *

      * @param obj the object whose field should be modified

      * @param l   the new value for the field of {@code obj}

      * being modified

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is either inaccessible or final.

      * @exception IllegalArgumentException  if the specified object is not an

      *              instance of the class or interface declaring the underlying

      *              field (or a subclass or implementor thereof),

      *              or if an unwrapping conversion fails.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#set

      */

     public void setLong(Object obj, long l)

         throws IllegalArgumentException, IllegalAccessException

     {

         getFieldAccessor(obj).setLong(obj, l);

     }

     /**

      * Sets the value of a field as a {@code float} on the specified object.

      * This method is equivalent to

      * {@code set(obj, fObj)},

      * where {@code fObj} is a {@code Float} object and

      * {@code fObj.floatValue() == f}.

      *

      * @param obj the object whose field should be modified

      * @param f   the new value for the field of {@code obj}

      * being modified

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is either inaccessible or final.

      * @exception IllegalArgumentException  if the specified object is not an

      *              instance of the class or interface declaring the underlying

      *              field (or a subclass or implementor thereof),

      *              or if an unwrapping conversion fails.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#set

      */

     public void setFloat(Object obj, float f)

         throws IllegalArgumentException, IllegalAccessException

     {

         getFieldAccessor(obj).setFloat(obj, f);

     }

     /**

      * Sets the value of a field as a {@code double} on the specified object.

      * This method is equivalent to

      * {@code set(obj, dObj)},

      * where {@code dObj} is a {@code Double} object and

      * {@code dObj.doubleValue() == d}.

      *

      * @param obj the object whose field should be modified

      * @param d   the new value for the field of {@code obj}

      * being modified

      *

      * @exception IllegalAccessException    if this {@code Field} object

      *              is enforcing Java language access control and the underlying

      *              field is either inaccessible or final.

      * @exception IllegalArgumentException  if the specified object is not an

      *              instance of the class or interface declaring the underlying

      *              field (or a subclass or implementor thereof),

      *              or if an unwrapping conversion fails.

      * @exception NullPointerException      if the specified object is null

      *              and the field is an instance field.

      * @exception ExceptionInInitializerError if the initialization provoked

      *              by this method fails.

      * @see       Field#set

      */

     public void setDouble(Object obj, double d)

         throws IllegalArgumentException, IllegalAccessException

     {

         getFieldAccessor(obj).setDouble(obj, d);

     }

     // Convenience routine which performs security checks

     private FieldAccessor getFieldAccessor(Object obj)

         throws IllegalAccessException

     {

         throw new SecurityException();

     }

     private static abstract class FieldAccessor {

         abstract void setShort(Object obj, short s);

         abstract void setInt(Object obj, int i);

         abstract void setChar(Object obj, char c);

         abstract void setByte(Object obj, byte b);

         abstract void setBoolean(Object obj, boolean z);

         abstract void set(Object obj, Object value);

         abstract double getDouble(Object obj);

         abstract void setLong(Object obj, long l);

         abstract void setFloat(Object obj, float f);

         abstract void setDouble(Object obj, double d);

         abstract long getLong(Object obj);

         abstract int getInt(Object obj);

         abstract short getShort(Object obj);

         abstract char getChar(Object obj);

         abstract byte getByte(Object obj);

         abstract boolean getBoolean(Object obj);

         abstract Object get(Object obj);

         abstract float getFloat(Object obj);

     }

     /*

      * Utility routine to paper over array type names

      */

     static String getTypeName(Class<?> type) {

         if (type.isArray()) {

             try {

                 Class<?> cl = type;

                 int dimensions = 0;

                 while (cl.isArray()) {

                     dimensions++;

                     cl = cl.getComponentType();

                 }

                 StringBuffer sb = new StringBuffer();

                 sb.append(cl.getName());

                 for (int i = 0; i < dimensions; i++) {

                     sb.append("[]");

                 }

                 return sb.toString();

             } catch (Throwable e) { /*FALLTHRU*/ }

         }

         return type.getName();

     }

     /**

      * @throws NullPointerException {@inheritDoc}

      * @since 1.5

      */

     public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {

         if (annotationClass == null)

             throw new NullPointerException();

         throw new UnsupportedOperationException();

     }

     /**

      * @since 1.5

      */

     public Annotation[] getDeclaredAnnotations()  {

         throw new UnsupportedOperationException();

     }

 }