/*
* 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
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*/
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<String> 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<String> list1 = type1.getIndexNames();
List<String> 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;
}