jdk/src/jdk.management/share/classes/com/sun/management/internal/VMOptionCompositeData.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.management/share/classes/com/sun/management/internal/VMOptionCompositeData.java Fri Apr 17 09:40:02 2015 +0200
@@ -0,0 +1,135 @@
+/*
+ * Copyright (c) 2005, 2015, 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 com.sun.management.internal;
+
+import com.sun.management.VMOption;
+import com.sun.management.VMOption.Origin;
+import javax.management.openmbean.CompositeType;
+import javax.management.openmbean.CompositeData;
+import javax.management.openmbean.CompositeDataSupport;
+import javax.management.openmbean.OpenDataException;
+import sun.management.LazyCompositeData;
+import sun.management.MappedMXBeanType;
+
+/**
+ * A CompositeData for VMOption 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 VMOptionCompositeData extends LazyCompositeData {
+ private final VMOption option;
+
+ private VMOptionCompositeData(VMOption option) {
+ this.option = option;
+ }
+
+ public VMOption getVMOption() {
+ return option;
+ }
+
+ public static CompositeData toCompositeData(VMOption option) {
+ VMOptionCompositeData vcd = new VMOptionCompositeData(option);
+ return vcd.getCompositeData();
+ }
+
+ protected CompositeData getCompositeData() {
+ // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH
+ // vmOptionItemNames!
+ final Object[] vmOptionItemValues = {
+ option.getName(),
+ option.getValue(),
+ option.isWriteable(),
+ option.getOrigin().toString(),
+ };
+
+ try {
+ return new CompositeDataSupport(vmOptionCompositeType,
+ vmOptionItemNames,
+ vmOptionItemValues);
+ } catch (OpenDataException e) {
+ // Should never reach here
+ throw new AssertionError(e);
+ }
+ }
+
+ private static final CompositeType vmOptionCompositeType;
+ static {
+ try {
+ vmOptionCompositeType = (CompositeType)
+ MappedMXBeanType.toOpenType(VMOption.class);
+ } catch (OpenDataException e) {
+ // Should never reach here
+ throw new AssertionError(e);
+ }
+ }
+
+ static CompositeType getVMOptionCompositeType() {
+ return vmOptionCompositeType;
+ }
+
+ private static final String NAME = "name";
+ private static final String VALUE = "value";
+ private static final String WRITEABLE = "writeable";
+ private static final String ORIGIN = "origin";
+
+ private static final String[] vmOptionItemNames = {
+ NAME,
+ VALUE,
+ WRITEABLE,
+ ORIGIN,
+ };
+
+ public static String getName(CompositeData cd) {
+ return getString(cd, NAME);
+ }
+ public static String getValue(CompositeData cd) {
+ return getString(cd, VALUE);
+ }
+ public static Origin getOrigin(CompositeData cd) {
+ String o = getString(cd, ORIGIN);
+ return Enum.valueOf(Origin.class, o);
+ }
+ public static boolean isWriteable(CompositeData cd) {
+ return getBoolean(cd, WRITEABLE);
+ }
+
+ /** 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(vmOptionCompositeType, cd.getCompositeType())) {
+ throw new IllegalArgumentException(
+ "Unexpected composite type for VMOption");
+ }
+ }
+
+ private static final long serialVersionUID = -2395573975093578470L;
+}