/*
* Hibernate OGM, Domain model persistence for NoSQL datastores
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.ogm.datastore.infinispan.dialect.impl;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Collections;
import java.util.Set;
import org.hibernate.ogm.datastore.infinispan.InfinispanDialect;
import org.hibernate.ogm.datastore.infinispan.impl.InfinispanDatastoreProvider;
import org.hibernate.ogm.grid.IdSourceKey;
import org.hibernate.ogm.grid.IdSourceKeyMetadata;
import org.infinispan.commons.marshall.AdvancedExternalizer;
/**
* An externalizer for serializing and de-serializing {@link IdSourceKey} instances. Implicitly used by
* {@link InfinispanDialect} which stores keys as is in the Infinispan data store.
* <p>
* This externalizer is automatically registered with the cache manager when starting the
* {@link InfinispanDatastoreProvider}, so it's not required to configure the externalizer in the Infinispan
* configuration file.
*
* @author Gunnar Morling
*/
// As an implementation of AdvancedExternalizer this is never serialized according to the Externalizer docs
@SuppressWarnings("serial")
public class IdSourceKeyExternalizer implements AdvancedExternalizer<IdSourceKey> {
public static final IdSourceKeyExternalizer INSTANCE = new IdSourceKeyExternalizer();
/**
* Format version of the key type; allows to apply version dependent deserialization logic in the future if
* required; to be incremented when adding new fields to the serialized structure
*/
private static final int VERSION = 1;
private static final Set<Class<? extends IdSourceKey>> TYPE_CLASSES = Collections.<Class<? extends IdSourceKey>>singleton( IdSourceKey.class );
private IdSourceKeyExternalizer() {
}
@Override
public void writeObject(ObjectOutput output, IdSourceKey key) throws IOException {
output.writeInt( VERSION );
output.writeUTF( key.getTable() );
output.writeObject( key.getColumnNames() );
output.writeObject( key.getColumnValues() );
}
@Override
public IdSourceKey readObject(ObjectInput input) throws IOException, ClassNotFoundException {
// version
input.readInt();
String tableName = input.readUTF();
String[] columnNames = (String[]) input.readObject();
Object[] values = (Object[]) input.readObject();
IdSourceKeyMetadata metadata = IdSourceKeyMetadata.forTable( tableName, columnNames[0], null );
return IdSourceKey.forTable( metadata , (String) values[0] );
}
@Override
public Set<Class<? extends IdSourceKey>> getTypeClasses() {
return TYPE_CLASSES;
}
@Override
public Integer getId() {
return ExternalizerIds.ID_GENERATOR_KEY;
}
}