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/*
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* Copyright 2003-2005 Sun Microsystems, Inc. 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.
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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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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package sun.jvm.hotspot.tools;
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import java.util.*;
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import sun.jvm.hotspot.gc_interface.*;
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import sun.jvm.hotspot.gc_implementation.parallelScavenge.*;
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import sun.jvm.hotspot.gc_implementation.shared.*;
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import sun.jvm.hotspot.memory.*;
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import sun.jvm.hotspot.runtime.*;
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import sun.jvm.hotspot.tools.*;
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public class HeapSummary extends Tool {
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public static void main(String[] args) {
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HeapSummary hs = new HeapSummary();
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hs.start(args);
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hs.stop();
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}
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public void run() {
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CollectedHeap heap = VM.getVM().getUniverse().heap();
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VM.Flag[] flags = VM.getVM().getCommandLineFlags();
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Map flagMap = new HashMap();
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if (flags == null) {
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System.out.println("WARNING: command line flags are not available");
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} else {
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for (int f = 0; f < flags.length; f++) {
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flagMap.put(flags[f].getName(), flags[f]);
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}
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}
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System.out.println();
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printGCAlgorithm(flagMap);
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System.out.println();
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System.out.println("Heap Configuration:");
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printValue("MinHeapFreeRatio = ", getFlagValue("MinHeapFreeRatio", flagMap));
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printValue("MaxHeapFreeRatio = ", getFlagValue("MaxHeapFreeRatio", flagMap));
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printValMB("MaxHeapSize = ", getFlagValue("MaxHeapSize", flagMap));
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printValMB("NewSize = ", getFlagValue("NewSize", flagMap));
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printValMB("MaxNewSize = ", getFlagValue("MaxNewSize", flagMap));
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printValMB("OldSize = ", getFlagValue("OldSize", flagMap));
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printValue("NewRatio = ", getFlagValue("NewRatio", flagMap));
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printValue("SurvivorRatio = ", getFlagValue("SurvivorRatio", flagMap));
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printValMB("PermSize = ", getFlagValue("PermSize", flagMap));
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printValMB("MaxPermSize = ", getFlagValue("MaxPermSize", flagMap));
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System.out.println();
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System.out.println("Heap Usage:");
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if (heap instanceof GenCollectedHeap) {
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GenCollectedHeap genHeap = (GenCollectedHeap) heap;
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for (int n = 0; n < genHeap.nGens(); n++) {
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Generation gen = genHeap.getGen(n);
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if (gen instanceof sun.jvm.hotspot.memory.DefNewGeneration) {
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System.out.println("New Generation (Eden + 1 Survivor Space):");
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printGen(gen);
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ContiguousSpace eden = ((DefNewGeneration)gen).eden();
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System.out.println("Eden Space:");
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printSpace(eden);
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ContiguousSpace from = ((DefNewGeneration)gen).from();
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System.out.println("From Space:");
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printSpace(from);
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ContiguousSpace to = ((DefNewGeneration)gen).to();
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System.out.println("To Space:");
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printSpace(to);
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} else {
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System.out.println(gen.name() + ":");
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printGen(gen);
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}
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}
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// Perm generation
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Generation permGen = genHeap.permGen();
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System.out.println("Perm Generation:");
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printGen(permGen);
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} else if (heap instanceof ParallelScavengeHeap) {
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ParallelScavengeHeap psh = (ParallelScavengeHeap) heap;
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PSYoungGen youngGen = psh.youngGen();
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printPSYoungGen(youngGen);
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PSOldGen oldGen = psh.oldGen();
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long oldFree = oldGen.capacity() - oldGen.used();
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System.out.println("PS Old Generation");
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printValMB("capacity = ", oldGen.capacity());
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printValMB("used = ", oldGen.used());
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printValMB("free = ", oldFree);
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System.out.println(alignment + (double)oldGen.used() * 100.0 / oldGen.capacity() + "% used");
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PSPermGen permGen = psh.permGen();
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long permFree = permGen.capacity() - permGen.used();
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System.out.println("PS Perm Generation");
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printValMB("capacity = ", permGen.capacity());
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printValMB("used = ", permGen.used());
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printValMB("free = ", permFree);
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System.out.println(alignment + (double)permGen.used() * 100.0 / permGen.capacity() + "% used");
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} else {
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throw new RuntimeException("unknown heap type : " + heap.getClass());
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}
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}
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// Helper methods
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private void printGCAlgorithm(Map flagMap) {
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// print about new generation
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long l = getFlagValue("UseParNewGC", flagMap);
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if (l == 1L) {
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System.out.println("using parallel threads in the new generation.");
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}
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l = getFlagValue("UseTLAB", flagMap);
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if (l == 1L) {
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System.out.println("using thread-local object allocation.");
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}
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l = getFlagValue("UseConcMarkSweepGC", flagMap);
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if (l == 1L) {
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System.out.println("Concurrent Mark-Sweep GC");
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return;
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}
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l = getFlagValue("UseParallelGC", flagMap);
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if (l == 1L) {
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System.out.print("Parallel GC ");
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l = getFlagValue("ParallelGCThreads", flagMap);
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System.out.println("with " + l + " thread(s)");
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return;
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}
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System.out.println("Mark Sweep Compact GC");
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}
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private void printPSYoungGen(PSYoungGen youngGen) {
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System.out.println("PS Young Generation");
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MutableSpace eden = youngGen.edenSpace();
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System.out.println("Eden Space:");
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printMutableSpace(eden);
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MutableSpace from = youngGen.fromSpace();
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System.out.println("From Space:");
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printMutableSpace(from);
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MutableSpace to = youngGen.toSpace();
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System.out.println("To Space:");
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printMutableSpace(to);
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}
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private void printMutableSpace(MutableSpace space) {
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printValMB("capacity = ", space.capacity());
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printValMB("used = ", space.used());
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long free = space.capacity() - space.used();
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printValMB("free = ", free);
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System.out.println(alignment + (double)space.used() * 100.0 / space.capacity() + "% used");
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}
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private static String alignment = " ";
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private void printGen(Generation gen) {
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printValMB("capacity = ", gen.capacity());
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printValMB("used = ", gen.used());
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printValMB("free = ", gen.free());
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System.out.println(alignment + (double)gen.used() * 100.0 / gen.capacity() + "% used");
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}
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private void printSpace(ContiguousSpace space) {
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printValMB("capacity = ", space.capacity());
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printValMB("used = ", space.used());
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printValMB("free = ", space.free());
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System.out.println(alignment + (double)space.used() * 100.0 / space.capacity() + "% used");
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}
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private static final double FACTOR = 1024*1024;
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private void printValMB(String title, long value) {
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double mb = value / FACTOR;
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System.out.println(alignment + title + value + " (" + mb + "MB)");
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}
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private void printValue(String title, long value) {
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System.out.println(alignment + title + value);
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}
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private long getFlagValue(String name, Map flagMap) {
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VM.Flag f = (VM.Flag) flagMap.get(name);
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if (f != null) {
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if (f.isBool()) {
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return f.getBool()? 1L : 0L;
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} else {
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return Long.parseLong(f.getValue());
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}
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} else {
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return -1;
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}
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}
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}
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