1.1 --- a/emul/mini/src/main/java/java/lang/StackTraceElement.java Fri Mar 22 16:59:47 2013 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,223 +0,0 @@
1.4 -/*
1.5 - * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
1.6 - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 - *
1.8 - * This code is free software; you can redistribute it and/or modify it
1.9 - * under the terms of the GNU General Public License version 2 only, as
1.10 - * published by the Free Software Foundation. Oracle designates this
1.11 - * particular file as subject to the "Classpath" exception as provided
1.12 - * by Oracle in the LICENSE file that accompanied this code.
1.13 - *
1.14 - * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 - * version 2 for more details (a copy is included in the LICENSE file that
1.18 - * accompanied this code).
1.19 - *
1.20 - * You should have received a copy of the GNU General Public License version
1.21 - * 2 along with this work; if not, write to the Free Software Foundation,
1.22 - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 - *
1.24 - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 - * or visit www.oracle.com if you need additional information or have any
1.26 - * questions.
1.27 - */
1.28 -
1.29 -package java.lang;
1.30 -
1.31 -/**
1.32 - * An element in a stack trace, as returned by {@link
1.33 - * Throwable#getStackTrace()}. Each element represents a single stack frame.
1.34 - * All stack frames except for the one at the top of the stack represent
1.35 - * a method invocation. The frame at the top of the stack represents the
1.36 - * execution point at which the stack trace was generated. Typically,
1.37 - * this is the point at which the throwable corresponding to the stack trace
1.38 - * was created.
1.39 - *
1.40 - * @since 1.4
1.41 - * @author Josh Bloch
1.42 - */
1.43 -public final class StackTraceElement implements java.io.Serializable {
1.44 - // Normally initialized by VM (public constructor added in 1.5)
1.45 - private String declaringClass;
1.46 - private String methodName;
1.47 - private String fileName;
1.48 - private int lineNumber;
1.49 -
1.50 - /**
1.51 - * Creates a stack trace element representing the specified execution
1.52 - * point.
1.53 - *
1.54 - * @param declaringClass the fully qualified name of the class containing
1.55 - * the execution point represented by the stack trace element
1.56 - * @param methodName the name of the method containing the execution point
1.57 - * represented by the stack trace element
1.58 - * @param fileName the name of the file containing the execution point
1.59 - * represented by the stack trace element, or {@code null} if
1.60 - * this information is unavailable
1.61 - * @param lineNumber the line number of the source line containing the
1.62 - * execution point represented by this stack trace element, or
1.63 - * a negative number if this information is unavailable. A value
1.64 - * of -2 indicates that the method containing the execution point
1.65 - * is a native method
1.66 - * @throws NullPointerException if {@code declaringClass} or
1.67 - * {@code methodName} is null
1.68 - * @since 1.5
1.69 - */
1.70 - public StackTraceElement(String declaringClass, String methodName,
1.71 - String fileName, int lineNumber) {
1.72 - this.declaringClass = declaringClass;
1.73 - this.methodName = methodName;
1.74 - this.fileName = fileName;
1.75 - this.lineNumber = lineNumber;
1.76 - }
1.77 -
1.78 - /**
1.79 - * Returns the name of the source file containing the execution point
1.80 - * represented by this stack trace element. Generally, this corresponds
1.81 - * to the {@code SourceFile} attribute of the relevant {@code class}
1.82 - * file (as per <i>The Java Virtual Machine Specification</i>, Section
1.83 - * 4.7.7). In some systems, the name may refer to some source code unit
1.84 - * other than a file, such as an entry in source repository.
1.85 - *
1.86 - * @return the name of the file containing the execution point
1.87 - * represented by this stack trace element, or {@code null} if
1.88 - * this information is unavailable.
1.89 - */
1.90 - public String getFileName() {
1.91 - return fileName;
1.92 - }
1.93 -
1.94 - /**
1.95 - * Returns the line number of the source line containing the execution
1.96 - * point represented by this stack trace element. Generally, this is
1.97 - * derived from the {@code LineNumberTable} attribute of the relevant
1.98 - * {@code class} file (as per <i>The Java Virtual Machine
1.99 - * Specification</i>, Section 4.7.8).
1.100 - *
1.101 - * @return the line number of the source line containing the execution
1.102 - * point represented by this stack trace element, or a negative
1.103 - * number if this information is unavailable.
1.104 - */
1.105 - public int getLineNumber() {
1.106 - return lineNumber;
1.107 - }
1.108 -
1.109 - /**
1.110 - * Returns the fully qualified name of the class containing the
1.111 - * execution point represented by this stack trace element.
1.112 - *
1.113 - * @return the fully qualified name of the {@code Class} containing
1.114 - * the execution point represented by this stack trace element.
1.115 - */
1.116 - public String getClassName() {
1.117 - return declaringClass;
1.118 - }
1.119 -
1.120 - /**
1.121 - * Returns the name of the method containing the execution point
1.122 - * represented by this stack trace element. If the execution point is
1.123 - * contained in an instance or class initializer, this method will return
1.124 - * the appropriate <i>special method name</i>, {@code <init>} or
1.125 - * {@code <clinit>}, as per Section 3.9 of <i>The Java Virtual
1.126 - * Machine Specification</i>.
1.127 - *
1.128 - * @return the name of the method containing the execution point
1.129 - * represented by this stack trace element.
1.130 - */
1.131 - public String getMethodName() {
1.132 - return methodName;
1.133 - }
1.134 -
1.135 - /**
1.136 - * Returns true if the method containing the execution point
1.137 - * represented by this stack trace element is a native method.
1.138 - *
1.139 - * @return {@code true} if the method containing the execution point
1.140 - * represented by this stack trace element is a native method.
1.141 - */
1.142 - public boolean isNativeMethod() {
1.143 - return lineNumber == -2;
1.144 - }
1.145 -
1.146 - /**
1.147 - * Returns a string representation of this stack trace element. The
1.148 - * format of this string depends on the implementation, but the following
1.149 - * examples may be regarded as typical:
1.150 - * <ul>
1.151 - * <li>
1.152 - * {@code "MyClass.mash(MyClass.java:9)"} - Here, {@code "MyClass"}
1.153 - * is the <i>fully-qualified name</i> of the class containing the
1.154 - * execution point represented by this stack trace element,
1.155 - * {@code "mash"} is the name of the method containing the execution
1.156 - * point, {@code "MyClass.java"} is the source file containing the
1.157 - * execution point, and {@code "9"} is the line number of the source
1.158 - * line containing the execution point.
1.159 - * <li>
1.160 - * {@code "MyClass.mash(MyClass.java)"} - As above, but the line
1.161 - * number is unavailable.
1.162 - * <li>
1.163 - * {@code "MyClass.mash(Unknown Source)"} - As above, but neither
1.164 - * the file name nor the line number are available.
1.165 - * <li>
1.166 - * {@code "MyClass.mash(Native Method)"} - As above, but neither
1.167 - * the file name nor the line number are available, and the method
1.168 - * containing the execution point is known to be a native method.
1.169 - * </ul>
1.170 - * @see Throwable#printStackTrace()
1.171 - */
1.172 - public String toString() {
1.173 - return getClassName() + "." + methodName +
1.174 - (isNativeMethod() ? "(Native Method)" :
1.175 - (fileName != null && lineNumber >= 0 ?
1.176 - "(" + fileName + ":" + lineNumber + ")" :
1.177 - (fileName != null ? "("+fileName+")" : "(Unknown Source)")));
1.178 - }
1.179 -
1.180 - /**
1.181 - * Returns true if the specified object is another
1.182 - * {@code StackTraceElement} instance representing the same execution
1.183 - * point as this instance. Two stack trace elements {@code a} and
1.184 - * {@code b} are equal if and only if:
1.185 - * <pre>
1.186 - * equals(a.getFileName(), b.getFileName()) &&
1.187 - * a.getLineNumber() == b.getLineNumber()) &&
1.188 - * equals(a.getClassName(), b.getClassName()) &&
1.189 - * equals(a.getMethodName(), b.getMethodName())
1.190 - * </pre>
1.191 - * where {@code equals} has the semantics of {@link
1.192 - * java.util.Objects#equals(Object, Object) Objects.equals}.
1.193 - *
1.194 - * @param obj the object to be compared with this stack trace element.
1.195 - * @return true if the specified object is another
1.196 - * {@code StackTraceElement} instance representing the same
1.197 - * execution point as this instance.
1.198 - */
1.199 - public boolean equals(Object obj) {
1.200 - if (obj==this)
1.201 - return true;
1.202 - if (!(obj instanceof StackTraceElement))
1.203 - return false;
1.204 - StackTraceElement e = (StackTraceElement)obj;
1.205 - return e.declaringClass.equals(declaringClass) &&
1.206 - e.lineNumber == lineNumber &&
1.207 - equals(methodName, e.methodName) &&
1.208 - equals(fileName, e.fileName);
1.209 - }
1.210 -
1.211 - /**
1.212 - * Returns a hash code value for this stack trace element.
1.213 - */
1.214 - public int hashCode() {
1.215 - int result = 31*declaringClass.hashCode() + methodName.hashCode();
1.216 - result = 31*result + (fileName == null ? 0 : fileName.hashCode());
1.217 - result = 31*result + lineNumber;
1.218 - return result;
1.219 - }
1.220 -
1.221 - private static boolean equals(Object a, Object b) {
1.222 - return (a == b) || (a != null && a.equals(b));
1.223 - }
1.224 -
1.225 - private static final long serialVersionUID = 6992337162326171013L;
1.226 -}