124 lines
4.6 KiB
Java
124 lines
4.6 KiB
Java
/*
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* Copyright 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. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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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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package sun.management;
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import javax.management.openmbean.CompositeType;
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import javax.management.openmbean.CompositeData;
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import javax.management.openmbean.CompositeDataSupport;
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import javax.management.openmbean.OpenDataException;
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/**
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* A CompositeData for StackTraceElement for the local management support.
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* This class avoids the performance penalty paid to the
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* construction of a CompositeData use in the local case.
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*/
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public class StackTraceElementCompositeData extends LazyCompositeData {
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private final StackTraceElement ste;
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private StackTraceElementCompositeData(StackTraceElement ste) {
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this.ste = ste;
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}
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public StackTraceElement getStackTraceElement() {
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return ste;
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}
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public static StackTraceElement from(CompositeData cd) {
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validateCompositeData(cd);
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return new StackTraceElement(getString(cd, CLASS_NAME),
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getString(cd, METHOD_NAME),
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getString(cd, FILE_NAME),
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getInt(cd, LINE_NUMBER));
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}
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public static CompositeData toCompositeData(StackTraceElement ste) {
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StackTraceElementCompositeData cd = new StackTraceElementCompositeData(ste);
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return cd.getCompositeData();
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}
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protected CompositeData getCompositeData() {
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// CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH
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// stackTraceElementItemNames!
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final Object[] stackTraceElementItemValues = {
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ste.getClassName(),
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ste.getMethodName(),
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ste.getFileName(),
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new Integer(ste.getLineNumber()),
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new Boolean(ste.isNativeMethod()),
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};
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try {
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return new CompositeDataSupport(stackTraceElementCompositeType,
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stackTraceElementItemNames,
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stackTraceElementItemValues);
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} catch (OpenDataException e) {
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// Should never reach here
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throw Util.newInternalError(e);
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}
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}
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private static final CompositeType stackTraceElementCompositeType;
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static {
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try {
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stackTraceElementCompositeType = (CompositeType)
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MappedMXBeanType.toOpenType(StackTraceElement.class);
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} catch (OpenDataException e) {
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// Should never reach here
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throw Util.newInternalError(e);
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}
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}
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// Attribute names
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private static final String CLASS_NAME = "className";
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private static final String METHOD_NAME = "methodName";
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private static final String FILE_NAME = "fileName";
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private static final String LINE_NUMBER = "lineNumber";
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private static final String NATIVE_METHOD = "nativeMethod";
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private static final String[] stackTraceElementItemNames = {
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CLASS_NAME,
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METHOD_NAME,
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FILE_NAME,
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LINE_NUMBER,
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NATIVE_METHOD,
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};
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/** Validate if the input CompositeData has the expected
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* CompositeType (i.e. contain all attributes with expected
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* names and types).
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*/
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public static void validateCompositeData(CompositeData cd) {
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if (cd == null) {
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throw new NullPointerException("Null CompositeData");
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}
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if (!isTypeMatched(stackTraceElementCompositeType, cd.getCompositeType())) {
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throw new IllegalArgumentException(
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"Unexpected composite type for StackTraceElement");
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}
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}
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}
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