/**
* GRANITE DATA SERVICES
* Copyright (C) 2006-2015 GRANITE DATA SERVICES S.A.S.
*
* This file is part of the Granite Data Services Platform.
*
* Granite Data Services 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.
*
* Granite Data Services 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA, or see <http://www.gnu.org/licenses/>.
*/
package org.granite.eclipselink.jmf;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
import java.util.SortedMap;
import java.util.SortedSet;
import org.eclipse.persistence.indirection.IndirectContainer;
import org.eclipse.persistence.indirection.ValueHolder;
import org.granite.messaging.jmf.ExtendedObjectInput;
import org.granite.messaging.jmf.ExtendedObjectOutput;
import org.granite.messaging.jmf.JMFConstants;
import org.granite.messaging.jmf.codec.ExtendedObjectCodec;
import org.granite.messaging.jmf.persistence.JMFPersistentCollectionSnapshot;
import org.granite.messaging.persistence.PersistentCollectionSnapshot;
/**
* @author Franck WOLFF
*/
public abstract class AbstractPersistentCollectionCodec<H extends IndirectContainer> implements ExtendedObjectCodec {
protected final Class<H> eclipseLinkCollectionClass;
protected final String clientCollectionClassName;
public AbstractPersistentCollectionCodec(Class<H> eclipseLinkCollectionClass) {
this.eclipseLinkCollectionClass = eclipseLinkCollectionClass;
this.clientCollectionClassName = JMFConstants.CLIENT_PERSISTENCE_COLLECTION_PACKAGE + "." + eclipseLinkCollectionClass.getSimpleName().replace("Indirect", "Persistent");
}
public boolean canEncode(ExtendedObjectOutput out, Object v) {
return v.getClass() == eclipseLinkCollectionClass;
}
public String getEncodedClassName(ExtendedObjectOutput out, Object v) {
return clientCollectionClassName;
}
public void encode(ExtendedObjectOutput out, Object v) throws IOException, IllegalAccessException {
JMFPersistentCollectionSnapshot snapshot = null;
IndirectContainer collection = (IndirectContainer)v;
if (!collection.isInstantiated())
snapshot = new JMFPersistentCollectionSnapshot(collection instanceof SortedSet || collection instanceof SortedMap, null);
else if (collection instanceof Map)
snapshot = new JMFPersistentCollectionSnapshot(true, null, false, (Map<?, ?>)collection);
else
snapshot = new JMFPersistentCollectionSnapshot(true, null, false, (Collection<?>)collection);
snapshot.writeExternal(out);
}
public boolean canDecode(ExtendedObjectInput in, String className) {
return clientCollectionClassName.equals(className);
}
public String getDecodedClassName(ExtendedObjectInput in, String className) {
return eclipseLinkCollectionClass.getName();
}
@SuppressWarnings("unchecked")
public void decode(ExtendedObjectInput in, Object v) throws IOException, ClassNotFoundException, IllegalAccessException {
IndirectContainer collection = (IndirectContainer)v;
if (collection.isInstantiated()) {
PersistentCollectionSnapshot snapshot = new JMFPersistentCollectionSnapshot(null);
snapshot.readCoreData(in);
if (collection instanceof Map)
((Map<Object, Object>)collection).putAll(snapshot.getElementsAsMap());
else
((Collection<Object>)collection).addAll(snapshot.getElementsAsCollection());
}
else if (collection.getValueHolder() instanceof UninstantiatedValueHolder)
collection.setValueHolder(null);
}
protected static class UninstantiatedValueHolder extends ValueHolder {
private static final long serialVersionUID = 1L;
@Override
public boolean isInstantiated() {
return false;
}
}
}