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