author | ohair |
Tue, 25 May 2010 15:58:33 -0700 | |
changeset 5506 | 202f599c92aa |
parent 715 | f16baef3a20e |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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* The Original Code is HAT. The Initial Developer of the |
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* Original Code is Bill Foote, with contributions from others |
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642c8c0be52e
6695553: Cleanup GPLv2+SPL legal notices in hat sources
ohair
parents:
2
diff
changeset
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* at JavaSoft/Sun. |
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*/ |
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package com.sun.tools.hat.internal.parser; |
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import java.io.*; |
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import com.sun.tools.hat.internal.model.*; |
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/** |
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* Abstract base class for reading object dump files. A reader need not be |
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* thread-safe. |
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* |
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* @author Bill Foote |
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*/ |
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public abstract class Reader { |
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protected PositionDataInputStream in; |
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protected Reader(PositionDataInputStream in) { |
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this.in = in; |
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} |
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/** |
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* Read a snapshot from a data input stream. It is assumed that the magic |
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* number has already been read. |
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*/ |
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abstract public Snapshot read() throws IOException; |
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/** |
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* Read a snapshot from a file. |
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* |
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* @param heapFile The name of a file containing a heap dump |
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* @param callStack If true, read the call stack of allocaation sites |
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*/ |
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public static Snapshot readFile(String heapFile, boolean callStack, |
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int debugLevel) |
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throws IOException { |
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int dumpNumber = 1; |
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int pos = heapFile.lastIndexOf('#'); |
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if (pos > -1) { |
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String num = heapFile.substring(pos+1, heapFile.length()); |
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try { |
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dumpNumber = Integer.parseInt(num, 10); |
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} catch (java.lang.NumberFormatException ex) { |
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String msg = "In file name \"" + heapFile |
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+ "\", a dump number was " |
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+ "expected after the :, but \"" |
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+ num + "\" was found instead."; |
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System.err.println(msg); |
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throw new IOException(msg); |
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} |
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heapFile = heapFile.substring(0, pos); |
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} |
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PositionDataInputStream in = new PositionDataInputStream( |
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new BufferedInputStream(new FileInputStream(heapFile))); |
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try { |
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int i = in.readInt(); |
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if (i == HprofReader.MAGIC_NUMBER) { |
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Reader r |
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= new HprofReader(heapFile, in, dumpNumber, |
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callStack, debugLevel); |
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return r.read(); |
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} else { |
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throw new IOException("Unrecognized magic number: " + i); |
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} |
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} finally { |
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in.close(); |
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} |
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} |
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} |