/*
* Copyright (c) 2005, 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
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*/
package sun.management;
import java.lang.management.MonitorInfo;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.openmbean.OpenDataException;
import java.util.Set;
/**
* A CompositeData for MonitorInfo for the local management support.
* This class avoids the performance penalty paid to the
* construction of a CompositeData use in the local case.
*/
public class MonitorInfoCompositeData extends LazyCompositeData {
private final MonitorInfo lock;
private MonitorInfoCompositeData(MonitorInfo mi) {
this.lock = mi;
}
public MonitorInfo getMonitorInfo() {
return lock;
}
public static CompositeData toCompositeData(MonitorInfo mi) {
MonitorInfoCompositeData micd = new MonitorInfoCompositeData(mi);
return micd.getCompositeData();
}
protected CompositeData getCompositeData() {
// CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH
// monitorInfoItemNames!
int len = monitorInfoItemNames.length;
Object[] values = new Object[len];
CompositeData li = LockDataConverter.toLockInfoCompositeData(lock);
for (int i = 0; i < len; i++) {
String item = monitorInfoItemNames[i];
if (item.equals(LOCKED_STACK_FRAME)) {
StackTraceElement ste = lock.getLockedStackFrame();
values[i] = (ste != null ? StackTraceElementCompositeData.
toCompositeData(ste)
: null);
} else if (item.equals(LOCKED_STACK_DEPTH)) {
values[i] = new Integer(lock.getLockedStackDepth());
} else {
values[i] = li.get(item);
}
}
try {
return new CompositeDataSupport(monitorInfoCompositeType,
monitorInfoItemNames,
values);
} catch (OpenDataException e) {
// Should never reach here
throw new AssertionError(e);
}
}
private static final CompositeType monitorInfoCompositeType;
private static final String[] monitorInfoItemNames;
static {
try {
monitorInfoCompositeType = (CompositeType)
MappedMXBeanType.toOpenType(MonitorInfo.class);
Set<String> s = monitorInfoCompositeType.keySet();
monitorInfoItemNames = (String[]) s.toArray(new String[0]);
} catch (OpenDataException e) {
// Should never reach here
throw new AssertionError(e);
}
}
static CompositeType getMonitorInfoCompositeType() {
return monitorInfoCompositeType;
}
private static final String CLASS_NAME = "className";
private static final String IDENTITY_HASH_CODE = "identityHashCode";
private static final String LOCKED_STACK_FRAME = "lockedStackFrame";
private static final String LOCKED_STACK_DEPTH = "lockedStackDepth";
public static String getClassName(CompositeData cd) {
return getString(cd, CLASS_NAME);
}
public static int getIdentityHashCode(CompositeData cd) {
return getInt(cd, IDENTITY_HASH_CODE);
}
public static StackTraceElement getLockedStackFrame(CompositeData cd) {
CompositeData ste = (CompositeData) cd.get(LOCKED_STACK_FRAME);
if (ste != null) {
return StackTraceElementCompositeData.from(ste);
} else {
return null;
}
}
public static int getLockedStackDepth(CompositeData cd) {
return getInt(cd, LOCKED_STACK_DEPTH);
}
/** Validate if the input CompositeData has the expected
* CompositeType (i.e. contain all attributes with expected
* names and types).
*/
public static void validateCompositeData(CompositeData cd) {
if (cd == null) {
throw new NullPointerException("Null CompositeData");
}
if (!isTypeMatched(monitorInfoCompositeType, cd.getCompositeType())) {
throw new IllegalArgumentException(
"Unexpected composite type for MonitorInfo");
}
}
private static final long serialVersionUID = -5825215591822908529L;
}