001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: * The Original Software is NetBeans. The Initial Developer of the Original
026: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
027: * Microsystems, Inc. All Rights Reserved.
028: *
029: * If you wish your version of this file to be governed by only the CDDL
030: * or only the GPL Version 2, indicate your decision by adding
031: * "[Contributor] elects to include this software in this distribution
032: * under the [CDDL or GPL Version 2] license." If you do not indicate a
033: * single choice of license, a recipient has the option to distribute
034: * your version of this file under either the CDDL, the GPL Version 2 or
035: * to extend the choice of license to its licensees as provided above.
036: * However, if you add GPL Version 2 code and therefore, elected the GPL
037: * Version 2 license, then the option applies only if the new code is
038: * made subject to such option by the copyright holder.
039: */
040:
041: package org.netbeans.lib.profiler.heap;
042:
043: import java.io.File;
044: import java.io.FileInputStream;
045: import java.io.IOException;
046: import java.nio.MappedByteBuffer;
047: import java.nio.channels.FileChannel;
048:
049: /**
050: *
051: * @author Tomas Hurka
052: */
053: class HprofMappedByteBuffer extends HprofByteBuffer {
054: //~ Instance fields ----------------------------------------------------------------------------------------------------------
055:
056: private MappedByteBuffer dumpBuffer;
057:
058: //~ Constructors -------------------------------------------------------------------------------------------------------------
059:
060: HprofMappedByteBuffer(File dumpFile) throws IOException {
061: FileInputStream fis = new FileInputStream(dumpFile);
062: FileChannel channel = fis.getChannel();
063: length = channel.size();
064: dumpBuffer = channel.map(FileChannel.MapMode.READ_ONLY, 0,
065: length);
066: channel.close();
067: readHeader();
068: }
069:
070: //~ Methods ------------------------------------------------------------------------------------------------------------------
071:
072: char getChar(long index) {
073: return dumpBuffer.getChar((int) index);
074: }
075:
076: double getDouble(long index) {
077: return dumpBuffer.getDouble((int) index);
078: }
079:
080: float getFloat(long index) {
081: return dumpBuffer.getFloat((int) index);
082: }
083:
084: int getInt(long index) {
085: return dumpBuffer.getInt((int) index);
086: }
087:
088: long getLong(long index) {
089: return dumpBuffer.getLong((int) index);
090: }
091:
092: short getShort(long index) {
093: return dumpBuffer.getShort((int) index);
094: }
095:
096: // delegate to MappedByteBuffer
097: byte get(long index) {
098: return dumpBuffer.get((int) index);
099: }
100:
101: synchronized void get(long position, byte[] chars) {
102: dumpBuffer.position((int) position);
103: dumpBuffer.get(chars);
104: }
105: }
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