Merge JDK 1.4 exception chaining support from classpath.
* java/lang/Throwable.java: Merge 1.4 support from classpath. (stackTraceBytes): Rename from stackTrace. * java/lang/Exception.java: Merge from classpath. * java/lang/StackTraceElement: New file from classpath. * gcj/javaprims.h: Rebuild CNI namespace declarations. * Makefile.am: Add StackTraceElement. * Makefile.in: Rebuilt. From-SVN: r53836
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Bryce McKinlay
Bryce McKinlay
parent
7efda05490
commit
4fbecd2944
7 changed files with 732 additions and 68 deletions
259
libjava/java/lang/StackTraceElement.java
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259
libjava/java/lang/StackTraceElement.java
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/* StackTraceElement.java -- One function call or call stack element
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Copyright (C) 2001, 2002 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.lang;
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import java.io.Serializable;
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/**
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* One function call or stack trace element. Gives information about
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* the execution point such as the source file name, the line number,
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* the fully qualified class name, the method name and whether this method
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* is native, if this information is known.
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*
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* @author Mark Wielaard <mark@klomp.org>
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* @author Eric Blake <ebb9@email.byu.edu>
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* @since 1.4
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* @status updated to 1.4
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*/
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public class StackTraceElement implements Serializable
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{
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/**
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* Compatible with JDK 1.4+.
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*/
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private static final long serialVersionUID = 6992337162326171013L;
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/**
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* The name of the file, null if unknown.
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*
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* @serial the source code filename, if known
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*/
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private final String fileName;
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/**
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* The line number in the file, negative if unknown.
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*
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* @serial the source code line number, if known
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*/
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private final int lineNumber;
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/**
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* The fully qualified class name, null if unknown.
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*
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* @serial the enclosing class, if known
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*/
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private final String className;
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/**
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* The method name in the class, null if unknown.
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*
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* @serial the enclosing method, if known
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*/
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private final String methodName;
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/** Whether the method is native. */
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private final transient boolean isNative;
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/**
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* A package local constructor for the StackTraceElement class, to be
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* called by the Virtual Machine as part of Throwable.fillInStackTrace.
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* There are no public constructors defined for this class. Creation
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* of new elements is implementation specific.
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*
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* @param fileName the name of the file, null if unknown
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* @param lineNumber the line in the file, negative if unknown
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* @param className the fully qualified name of the class, null if unknown
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* @param methodName the name of the method, null if unknown
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* @param isNative true if native, false otherwise
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*/
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StackTraceElement(String fileName, int lineNumber, String className,
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String methodName, boolean isNative)
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{
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this.fileName = fileName;
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this.lineNumber = lineNumber;
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this.className = className;
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this.methodName = methodName;
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this.isNative = isNative;
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}
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/**
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* Returns the name of the file, or null if unknown. This is usually
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* obtained from the <code>SourceFile</code> attribute of the class file
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* format, if present.
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*
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* @return the file name
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*/
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public String getFileName()
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{
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return fileName;
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}
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/**
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* Returns the line number in the file, or a negative number if unknown.
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* This is usually obtained from the <code>LineNumberTable</code> attribute
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* of the method in the class file format, if present.
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*
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* @return the line number
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*/
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public int getLineNumber()
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{
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return lineNumber;
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}
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/**
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* Returns the fully qualified class name, or null if unknown.
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*
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* @return the class name
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*/
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public String getClassName()
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{
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return className;
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}
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/**
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* Returns the method name in the class, or null if unknown. If the
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* execution point is in a constructor, the name is
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* <code><init></code>; if the execution point is in the class
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* initializer, the name is <code><clinit></code>.
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*
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* @return the method name
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*/
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public String getMethodName()
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{
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return methodName;
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}
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/**
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* Returns true if the method is native, or false if it is not or unknown.
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*
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* @return whether the method is native
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*/
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public boolean isNativeMethod()
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{
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return isNative;
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}
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/**
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* Returns a string representation of this stack trace element. The
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* returned String is implementation specific. This implementation
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* returns the following String: "[class][.][method]([file][:line])".
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* If the fully qualified class name or the method is unknown it is
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* omitted including the point seperator. If the source file name is
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* unknown it is replaced by "Unknown Source" if the method is not native
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* or by "Native Method" if the method is native. If the line number
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* is unknown it and the colon are omitted.
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*
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* @return a string representation of this execution point
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*/
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public String toString()
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{
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StringBuffer sb = new StringBuffer();
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if (className != null)
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{
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sb.append(className);
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if (methodName != null)
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sb.append('.');
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}
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if (methodName != null)
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sb.append(methodName);
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sb.append('(');
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if (fileName != null)
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sb.append(fileName);
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else
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sb.append(isNative ? "Native Method" : "Unknown Source");
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if (lineNumber >= 0)
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sb.append(':').append(lineNumber);
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sb.append(')');
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return sb.toString();
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}
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/**
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* Returns true if the given object is also a StackTraceElement and all
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* attributes, except the native flag, are equal (either the same attribute
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* between the two elments are null, or both satisfy Object.equals).
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*
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* @param o the object to compare
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* @return true if the two are equal
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*/
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public boolean equals(Object o)
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{
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if (! (o instanceof StackTraceElement))
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return false;
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StackTraceElement e = (StackTraceElement) o;
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return equals(fileName, e.fileName)
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&& lineNumber == e.lineNumber
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&& equals(className, e.className)
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&& equals(methodName, e.methodName);
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}
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/**
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* Returns the hashCode of this StackTraceElement. This implementation
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* computes the hashcode by xor-ing the hashcode of all attributes except
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* the native flag.
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*
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* @return the hashcode
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*/
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public int hashCode()
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{
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return hashCode(fileName) ^ lineNumber ^ hashCode(className)
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^ hashCode(methodName);
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}
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/**
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* Compare two objects according to Collection semantics.
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*
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* @param o1 the first object
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* @param o2 the second object
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* @return o1 == null ? o2 == null : o1.equals(o2)
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*/
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private static final boolean equals(Object o1, Object o2)
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{
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return o1 == null ? o2 == null : o1.equals(o2);
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}
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/**
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* Hash an object according to Collection semantics.
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*
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* @param o the object to hash
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* @return o1 == null ? 0 : o1.hashCode()
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*/
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private static final int hashCode(Object o)
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{
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return o == null ? 0 : o.hashCode();
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}
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}
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