diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/java.management/share/classes/sun/management/LazyCompositeData.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/java.management/share/classes/sun/management/LazyCompositeData.java Tue Sep 12 19:03:39 2017 +0200 @@ -0,0 +1,231 @@ +/* + * Copyright (c) 2004, 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 sun.management; + +import java.io.Serializable; +import java.util.*; +import javax.management.openmbean.ArrayType; +import javax.management.openmbean.CompositeData; +import javax.management.openmbean.CompositeType; +import javax.management.openmbean.OpenType; +import javax.management.openmbean.TabularType; + +/** + * This abstract class provides the implementation of the CompositeData + * interface. A CompositeData object will be lazily created only when + * the CompositeData interface is used. + * + * Classes that extends this abstract class will implement the + * getCompositeData() method. The object returned by the + * getCompositeData() is an instance of CompositeData such that + * the instance serializes itself as the type CompositeDataSupport. + */ +public abstract class LazyCompositeData + implements CompositeData, Serializable { + + private CompositeData compositeData; + + // Implementation of the CompositeData interface + @Override + public boolean containsKey(String key) { + return compositeData().containsKey(key); + } + + @Override + public boolean containsValue(Object value) { + return compositeData().containsValue(value); + } + + @Override + public boolean equals(Object obj) { + return compositeData().equals(obj); + } + + @Override + public Object get(String key) { + return compositeData().get(key); + } + + @Override + public Object[] getAll(String[] keys) { + return compositeData().getAll(keys); + } + + @Override + public CompositeType getCompositeType() { + return compositeData().getCompositeType(); + } + + @Override + public int hashCode() { + return compositeData().hashCode(); + } + + @Override + public String toString() { + /** FIXME: What should this be?? */ + return compositeData().toString(); + } + + @Override + public Collection values() { + return compositeData().values(); + } + + /* Lazy creation of a CompositeData object + * only when the CompositeData interface is used. + */ + private synchronized CompositeData compositeData() { + if (compositeData != null) + return compositeData; + compositeData = getCompositeData(); + return compositeData; + } + + /** + * Designate to a CompositeData object when writing to an + * output stream during serialization so that the receiver + * only requires JMX 1.2 classes but not any implementation + * specific class. + */ + protected Object writeReplace() throws java.io.ObjectStreamException { + return compositeData(); + } + + /** + * Returns the CompositeData representing this object. + * The returned CompositeData object must be an instance + * of javax.management.openmbean.CompositeDataSupport class + * so that no implementation specific class is required + * for unmarshalling besides JMX 1.2 classes. + */ + protected abstract CompositeData getCompositeData(); + + // Helper methods + public static String getString(CompositeData cd, String itemName) { + if (cd == null) + throw new IllegalArgumentException("Null CompositeData"); + + return (String) cd.get(itemName); + } + + public static boolean getBoolean(CompositeData cd, String itemName) { + if (cd == null) + throw new IllegalArgumentException("Null CompositeData"); + + return ((Boolean) cd.get(itemName)); + } + + public static long getLong(CompositeData cd, String itemName) { + if (cd == null) + throw new IllegalArgumentException("Null CompositeData"); + + return ((Long) cd.get(itemName)); + } + + public static int getInt(CompositeData cd, String itemName) { + if (cd == null) + throw new IllegalArgumentException("Null CompositeData"); + + return ((Integer) cd.get(itemName)); + } + + /** + * Compares two CompositeTypes and returns true if + * all items in type1 exist in type2 and their item types + * are the same. + * @param type1 the base composite type + * @param type2 the checked composite type + * @return {@code true} if all items in type1 exist in type2 and their item + * types are the same. + */ + protected static boolean isTypeMatched(CompositeType type1, CompositeType type2) { + if (type1 == type2) return true; + + // We can't use CompositeType.isValue() since it returns false + // if the type name doesn't match. + Set allItems = type1.keySet(); + + // Check all items in the type1 exist in type2 + if (!type2.keySet().containsAll(allItems)) + return false; + + return allItems.stream().allMatch( + item -> isTypeMatched(type1.getType(item), type2.getType(item)) + ); + } + + protected static boolean isTypeMatched(TabularType type1, TabularType type2) { + if (type1 == type2) return true; + + List list1 = type1.getIndexNames(); + List list2 = type2.getIndexNames(); + + // check if the list of index names are the same + if (!list1.equals(list2)) + return false; + + return isTypeMatched(type1.getRowType(), type2.getRowType()); + } + + protected static boolean isTypeMatched(ArrayType type1, ArrayType type2) { + if (type1 == type2) return true; + + int dim1 = type1.getDimension(); + int dim2 = type2.getDimension(); + + // check if the array dimensions are the same + if (dim1 != dim2) + return false; + + return isTypeMatched(type1.getElementOpenType(), type2.getElementOpenType()); + } + + private static boolean isTypeMatched(OpenType ot1, OpenType ot2) { + if (ot1 instanceof CompositeType) { + if (! (ot2 instanceof CompositeType)) + return false; + if (!isTypeMatched((CompositeType) ot1, (CompositeType) ot2)) + return false; + } else if (ot1 instanceof TabularType) { + if (! (ot2 instanceof TabularType)) + return false; + if (!isTypeMatched((TabularType) ot1, (TabularType) ot2)) + return false; + } else if (ot1 instanceof ArrayType) { + if (! (ot2 instanceof ArrayType)) + return false; + if (!isTypeMatched((ArrayType) ot1, (ArrayType) ot2)) { + return false; + } + } else if (!ot1.equals(ot2)) { + return false; + } + return true; + } + + private static final long serialVersionUID = -2190411934472666714L; +}