/*
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* Copyright 2015, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.wildfly.clustering.marshalling.spi.util;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedDeque;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.function.IntFunction;
import org.kohsuke.MetaInfServices;
import org.wildfly.clustering.marshalling.Externalizer;
import org.wildfly.clustering.marshalling.spi.IndexExternalizer;
/**
* Externalizers for non-concurrent implementations of {@link Collection}.
* @author Paul Ferraro
*/
public class CollectionExternalizer<T extends Collection<Object>> implements Externalizer<T> {
private final Class<T> targetClass;
private final IntFunction<T> factory;
@SuppressWarnings("unchecked")
CollectionExternalizer(Class<?> targetClass, IntFunction<T> factory) {
this.targetClass = (Class<T>) targetClass;
this.factory = factory;
}
@Override
public void writeObject(ObjectOutput output, T collection) throws IOException {
writeCollection(output, collection);
}
static <T extends Collection<Object>> void writeCollection(ObjectOutput output, T collection) throws IOException {
IndexExternalizer.VARIABLE.writeData(output, collection.size());
for (Object element : collection) {
output.writeObject(element);
}
}
@Override
public T readObject(ObjectInput input) throws IOException, ClassNotFoundException {
int size = IndexExternalizer.VARIABLE.readData(input);
return readCollection(input, this.factory.apply(size), size);
}
static <T extends Collection<Object>> T readCollection(ObjectInput input, T collection, int size) throws IOException, ClassNotFoundException {
for (int i = 0; i < size; ++i) {
collection.add(input.readObject());
}
return collection;
}
@Override
public Class<T> getTargetClass() {
return this.targetClass;
}
@MetaInfServices(Externalizer.class)
public static class ArrayDequeExternalizer extends CollectionExternalizer<ArrayDeque<Object>> {
public ArrayDequeExternalizer() {
super(ArrayDeque.class, ArrayDeque::new);
}
}
@MetaInfServices(Externalizer.class)
public static class ArrayListExternalizer extends CollectionExternalizer<ArrayList<Object>> {
public ArrayListExternalizer() {
super(ArrayList.class, ArrayList::new);
}
}
@MetaInfServices(Externalizer.class)
public static class ConcurrentHashSetExternalizer extends CollectionExternalizer<ConcurrentHashMap.KeySetView<Object, Boolean>> {
public ConcurrentHashSetExternalizer() {
super(ConcurrentHashMap.KeySetView.class, capacity -> ConcurrentHashMap.newKeySet(capacity));
}
}
@MetaInfServices(Externalizer.class)
public static class ConcurrentLinkedDequeExternalizer extends CollectionExternalizer<ConcurrentLinkedDeque<Object>> {
public ConcurrentLinkedDequeExternalizer() {
super(ConcurrentLinkedDeque.class, size -> new ConcurrentLinkedDeque<>());
}
}
@MetaInfServices(Externalizer.class)
public static class ConcurrentLinkedQueueExternalizer extends CollectionExternalizer<ConcurrentLinkedQueue<Object>> {
public ConcurrentLinkedQueueExternalizer() {
super(ConcurrentLinkedQueue.class, size -> new ConcurrentLinkedQueue<>());
}
}
@MetaInfServices(Externalizer.class)
public static class HashSetExternalizer extends CollectionExternalizer<HashSet<Object>> {
public HashSetExternalizer() {
super(HashSet.class, HashSet::new);
}
}
@MetaInfServices(Externalizer.class)
public static class LinkedHashSetExternalizer extends CollectionExternalizer<LinkedHashSet<Object>> {
public LinkedHashSetExternalizer() {
super(LinkedHashSet.class, LinkedHashSet::new);
}
}
@MetaInfServices(Externalizer.class)
public static class LinkedListExternalizer extends CollectionExternalizer<LinkedList<Object>> {
public LinkedListExternalizer() {
super(LinkedList.class, size -> new LinkedList<>());
}
}
}