/*
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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.Comparator;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.concurrent.ConcurrentSkipListSet;
import java.util.function.Function;
import org.kohsuke.MetaInfServices;
import org.wildfly.clustering.marshalling.Externalizer;
import org.wildfly.clustering.marshalling.spi.IndexExternalizer;
/**
* Externalizers for implementations of {@link SortedSet}.
* Requires additional serialization of the comparator.
* @author Paul Ferraro
*/
public class SortedSetExternalizer<T extends SortedSet<Object>> implements Externalizer<T> {
private final Class<T> targetClass;
private final Function<Comparator<? super Object>, T> factory;
@SuppressWarnings("unchecked")
SortedSetExternalizer(Class<?> targetClass, Function<Comparator<? super Object>, T> factory) {
this.targetClass = (Class<T>) targetClass;
this.factory = factory;
}
@Override
public void writeObject(ObjectOutput output, T set) throws IOException {
output.writeObject(set.comparator());
CollectionExternalizer.writeCollection(output, set);
}
@Override
public T readObject(ObjectInput input) throws IOException, ClassNotFoundException {
@SuppressWarnings("unchecked")
Comparator<? super Object> comparator = (Comparator<? super Object>) input.readObject();
int size = IndexExternalizer.VARIABLE.readData(input);
return CollectionExternalizer.readCollection(input, this.factory.apply(comparator), size);
}
@Override
public Class<T> getTargetClass() {
return this.targetClass;
}
@MetaInfServices(Externalizer.class)
public static class ConcurrentSkipListSetExternalizer extends SortedSetExternalizer<ConcurrentSkipListSet<Object>> {
public ConcurrentSkipListSetExternalizer() {
super(ConcurrentSkipListSet.class, ConcurrentSkipListSet<Object>::new);
}
}
@MetaInfServices(Externalizer.class)
public static class TreeSetExternalizer extends SortedSetExternalizer<TreeSet<Object>> {
public TreeSetExternalizer() {
super(TreeSet.class, TreeSet<Object>::new);
}
}
}