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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.
/** * 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).
/** 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; }