/*
* Copyright 1999-2010 Luca Garulli (l.garulli--at--orientechnologies.com)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.orientechnologies.orient.core.serialization.serializer.stream;
import java.io.IOException;
import java.lang.reflect.Constructor;
import com.orientechnologies.common.log.OLogManager;
import com.orientechnologies.orient.core.db.record.ODatabaseRecord;
import com.orientechnologies.orient.core.exception.OSerializationException;
import com.orientechnologies.orient.core.id.ORID;
import com.orientechnologies.orient.core.id.ORecordId;
import com.orientechnologies.orient.core.record.ORecord;
import com.orientechnologies.orient.core.record.ORecordInternal;
@SuppressWarnings("unchecked")
public class OStreamSerializerRecord implements OStreamSerializer {
public static final String NAME = "l";
public static final OStreamSerializerRecord INSTANCE = new OStreamSerializerRecord();
public String getName() {
return NAME;
}
/**
* Re-Create any object if the class has a public constructor that accepts a String as unique parameter.
*/
public Object fromStream(final ODatabaseRecord iDatabase, final byte[] iStream) throws IOException {
if (iStream == null || iStream.length == 0)
// NULL VALUE
return null;
Constructor<? extends ORecordInternal<?>> constructor = null;
try {
Constructor<?>[] constructors = iDatabase.getRecordType().getConstructors();
for (Constructor<?> c : constructors) {
if (c.getParameterTypes().length > 0 && ODatabaseRecord.class.isAssignableFrom(c.getParameterTypes()[0])) {
constructor = (Constructor<? extends ORecordInternal<?>>) c;
break;
}
}
final ORecordInternal<?> obj = constructor.newInstance(iDatabase);
final ORID rid = new ORecordId().fromStream(iStream);
obj.setIdentity(rid.getClusterId(), rid.getClusterPosition());
return obj;
} catch (Exception e) {
if (constructor == null)
OLogManager.instance().error(this, "Constructor not found for record class '%s'", e, OSerializationException.class,
iDatabase.getRecordType());
else
OLogManager.instance().error(this, "Error on unmarshalling record class: " + constructor.getDeclaringClass(), e,
OSerializationException.class);
}
return null;
}
public byte[] toStream(final ODatabaseRecord iDatabase, final Object iObject) throws IOException {
if (iObject == null)
return null;
if (((ORecord<?>) iObject).getIdentity() == null)
throw new OSerializationException("Can't serialize record without identity. Store it before to serialize.");
return ((ORecord<?>) iObject).getIdentity().toStream();
}
}