/*
* Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* 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.
*
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package com.sun.tools.visualvm.heapdump.impl;
import com.sun.tools.visualvm.core.snapshot.SnapshotCategory;
import com.sun.tools.visualvm.core.ui.DataSourceWindowManager;
import com.sun.tools.visualvm.heapdump.HeapDump;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import javax.swing.filechooser.FileFilter;
import org.openide.util.NbBundle;
/**
*
* @author Jiri Sedlacek
* @author Tomas Hurka
*/
public class HeapDumpCategory extends SnapshotCategory<HeapDump> {
private static final String HPROF_HEADER = "JAVA PROFILE 1.0";
private static final long MIN_HPROF_SIZE = 1024*1024L;
private static final String NAME = NbBundle.getMessage(HeapDumpCategory.class, "LBL_Heap_Dumps"); // NOI18N
private static final String PREFIX = "heapdump"; // NOI18N
private static final String SUFFIX = ".hprof"; // NOI18N
public HeapDumpCategory() {
super(NAME, HeapDump.class, PREFIX, SUFFIX, 20);
}
public boolean supportsOpenSnapshot() {
return true;
}
public void openSnapshot(File file) {
DataSourceWindowManager.sharedInstance().openDataSource(new HeapDumpImpl(file, null));
}
protected boolean isSnapshot(File file) {
if (super.isSnapshot(file)) {
return true;
}
return checkHprofFile(file);
}
private boolean checkHprofFile(File file) {
try {
if (file.isFile() && file.canRead() && file.length()>MIN_HPROF_SIZE) { // heap dump must be 1M and bigger
byte[] prefix = new byte[HPROF_HEADER.length()+4];
RandomAccessFile raf = new RandomAccessFile(file,"r"); // NOI18H
raf.readFully(prefix);
raf.close();
if (new String(prefix).startsWith(HPROF_HEADER)) {
return true;
}
}
} catch (FileNotFoundException ex) {
return false;
} catch (IOException ex) {
return false;
}
return false;
}
public FileFilter getFileFilter() {
return new FileFilter() {
public boolean accept(File f) {
return f.isDirectory() || isSnapshot(f);
}
public String getDescription() {
String suff = getSuffix();
return getName() + (suff != null ? " (*" + suff +", *.*"+ ")" : ""); // NOI18N
}
};
}
}