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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | |||
| 27 | /* | ||
| 28 | * The Original Code is HAT. The Initial Developer of the | ||
| 29 | * Original Code is Bill Foote, with contributions from others | ||
| 30 | * at JavaSoft/Sun. | ||
| 31 | */ | ||
| 32 | |||
| 33 | package com.sun.tools.hat.internal.parser; | ||
| 34 | |||
| 35 | import java.io.*; | ||
| 36 | import com.sun.tools.hat.internal.model.*; | ||
| 37 | |||
| 38 | /** | ||
| 39 | * Abstract base class for reading object dump files. A reader need not be | ||
| 40 | * thread-safe. | ||
| 41 | * | ||
| 42 | * @author Bill Foote | ||
| 43 | */ | ||
| 44 | |||
| 45 | |||
| 46 | public abstract class Reader { | ||
| 47 | protected PositionDataInputStream in; | ||
| 48 | |||
| 49 | protected Reader(PositionDataInputStream in) { | ||
| 50 | this.in = in; | ||
| 51 | } | ||
| 52 | |||
| 53 | /** | ||
| 54 | * Read a snapshot from a data input stream. It is assumed that the magic | ||
| 55 | * number has already been read. | ||
| 56 | */ | ||
| 57 | abstract public Snapshot read() throws IOException; | ||
| 58 | |||
| 59 | /** | ||
| 60 | * Read a snapshot from a file. | ||
| 61 | * | ||
| 62 | * @param heapFile The name of a file containing a heap dump | ||
| 63 | * @param callStack If true, read the call stack of allocaation sites | ||
| 64 | */ | ||
| 65 | public static Snapshot readFile(String heapFile, boolean callStack, | ||
| 66 | int debugLevel) | ||
| 67 | throws IOException { | ||
| 68 | int dumpNumber = 1; | ||
| 69 | int pos = heapFile.lastIndexOf('#'); | ||
| 70 | if (pos > -1) { | ||
| 71 | String num = heapFile.substring(pos+1, heapFile.length()); | ||
| 72 | try { | ||
| 73 | dumpNumber = Integer.parseInt(num, 10); | ||
| 74 | } catch (java.lang.NumberFormatException ex) { | ||
| 75 | String msg = "In file name \"" + heapFile | ||
| 76 | + "\", a dump number was " | ||
| 77 | + "expected after the :, but \"" | ||
| 78 | + num + "\" was found instead."; | ||
| 79 | System.err.println(msg); | ||
| 80 | throw new IOException(msg); | ||
| 81 | } | ||
| 82 | heapFile = heapFile.substring(0, pos); | ||
| 83 | } | ||
| 84 | PositionDataInputStream in = new PositionDataInputStream( | ||
| 85 | new BufferedInputStream(new FileInputStream(heapFile))); | ||
| 86 | try { | ||
| 87 | int i = in.readInt(); | ||
| 88 | if (i == HprofReader.MAGIC_NUMBER) { | ||
| 89 | Reader r | ||
| 90 | = new HprofReader(heapFile, in, dumpNumber, | ||
| 91 | callStack, debugLevel); | ||
| 92 | return r.read(); | ||
| 93 | } else { | ||
| 94 | throw new IOException("Unrecognized magic number: " + i); | ||
| 95 | } | ||
| 96 | } finally { | ||
| 97 | in.close(); | ||
| 98 | } | ||
| 99 | } | ||
| 100 | } | ||