/* * 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 * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.management; import javax.management.openmbean.CompositeType;import javax.management.openmbean.CompositeData;import javax.management.openmbean.CompositeDataSupport;import javax.management.openmbean.OpenDataException; /** * A CompositeData for StackTraceElement 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 StackTraceElementCompositeData extends LazyCompositeData {    private final StackTraceElement ste;     private StackTraceElementCompositeData(StackTraceElement ste) {        this.ste = ste;    }     public StackTraceElement getStackTraceElement() {        return ste;    }     public static StackTraceElement from(CompositeData cd) {        validateCompositeData(cd);         return new StackTraceElement(getString(cd, CLASS_NAME),                                     getString(cd, METHOD_NAME),                                     getString(cd, FILE_NAME),                                     getInt(cd, LINE_NUMBER));    }     public static CompositeData toCompositeData(StackTraceElement ste) {        StackTraceElementCompositeData cd = new StackTraceElementCompositeData(ste);        return cd.getCompositeData();    }     protected CompositeData getCompositeData() {        // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH        // stackTraceElementItemNames!        final Object[] stackTraceElementItemValues = {            ste.getClassName(),            ste.getMethodName(),            ste.getFileName(),            new Integer(ste.getLineNumber()),            new Boolean(ste.isNativeMethod()),        };        try {            return new CompositeDataSupport(stackTraceElementCompositeType,                                            stackTraceElementItemNames,                                            stackTraceElementItemValues);        } catch (OpenDataException e) {            // Should never reach here            throw new AssertionError(e);        }    }     private static final CompositeType stackTraceElementCompositeType;    static {        try {            stackTraceElementCompositeType = (CompositeType)                MappedMXBeanType.toOpenType(StackTraceElement.class);        } catch (OpenDataException e) {            // Should never reach here            throw new AssertionError(e);        }    }     // Attribute names    private static final String CLASS_NAME      = "className";    private static final String METHOD_NAME     = "methodName";    private static final String FILE_NAME       = "fileName";    private static final String LINE_NUMBER     = "lineNumber";    private static final String NATIVE_METHOD   = "nativeMethod";     private static final String[] stackTraceElementItemNames = {        CLASS_NAME,        METHOD_NAME,        FILE_NAME,        LINE_NUMBER,        NATIVE_METHOD,    };     /** 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(stackTraceElementCompositeType, cd.getCompositeType())) {            throw new IllegalArgumentException(                "Unexpected composite type for StackTraceElement");        }    }     private static final long serialVersionUID = -2704607706598396827L;}