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StackFrame.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common
 * Development and Distribution License("CDDL") (collectively, the
 * "License"). You may not use this file except in compliance with the
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 * http://www.netbeans.org/cddl-gplv2.html
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package org.netbeans.lib.profiler.heap;


/**
 *
 * @author Tomas Hurka
 */
00048 class StackFrame extends HprofObject {
    
    static final int NO_LINE_INFO = 0;
    static final int UNKNOWN_LOCATION = -1;
    static final int COMPILED_METHOD = -2;
    static final int NATIVE_METHOD = -3;
    
    //~ Instance fields ----------------------------------------------------------------------------------------------------------
    
    private final StackFrameSegment stackFrameSegment;
    
    //~ Constructors -------------------------------------------------------------------------------------------------------------
    
    StackFrame(StackFrameSegment segment, long offset) {
        super(offset);
        stackFrameSegment = segment;
        assert getHprofBuffer().get(offset) == HprofHeap.STACK_FRAME;
    }
    
    //~ Methods ------------------------------------------------------------------------------------------------------------------
    
    long getStackFrameID() {
        return getHprofBuffer().getID(fileOffset + stackFrameSegment.stackFrameIDOffset);
    }
    
    String getMethodName() {
        return getStringByOffset(stackFrameSegment.methodIDOffset);
    }
    
    String getMethodSignature() {
        return getStringByOffset(stackFrameSegment.methodSignatureIDOffset);
    }
    
    String getSourceFile() {
        return getStringByOffset(stackFrameSegment.sourceIDOffset);
    }
    
    String getClassName() {
        long classSerial = getHprofBuffer().getID(fileOffset + stackFrameSegment.classSerialNumberOffset);
        LoadClass loadClass = stackFrameSegment.hprofHeap.getLoadClassSegment().getClassBySerialNumber(classSerial);
        return loadClass.getName();
    }
    
    int getLineNumber() {
        return getHprofBuffer().getInt(fileOffset + stackFrameSegment.lineNumberOffset);
    }
    
    private HprofByteBuffer getHprofBuffer() {
        return stackFrameSegment.hprofHeap.dumpBuffer;
    }
    
    private String getStringByOffset(long offset) {
        long stringID = getHprofBuffer().getID(fileOffset + offset);
        return stackFrameSegment.hprofHeap.getStringSegment().getStringByID(stringID);
    }
}

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