/*
* Copyright 2011 JBoss, by Red Hat, Inc
*
* 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 org.jboss.errai.marshalling.client.marshallers;
import org.jboss.errai.common.client.protocols.SerializationParts;
import org.jboss.errai.marshalling.client.api.MarshallingSession;
import org.jboss.errai.marshalling.client.api.json.EJObject;
import org.jboss.errai.marshalling.client.api.json.EJValue;
/**
* @author Mike Brock
*/
public abstract class AbstractBackReferencingMarshaller<C> extends AbstractJSONMarshaller<C> {
@Override
public final String marshall(C o, MarshallingSession ctx) {
if (o == null) {
return "null";
}
final boolean isNew = !ctx.isEncoded(o);
final String objId = ctx.getObjectHash(o);
final StringBuilder buf = new StringBuilder("{\"").append(SerializationParts.ENCODED_TYPE).append("\":\"")
.append(o.getClass().getName()).append("\",\"").append(SerializationParts.OBJECT_ID).append("\":\"")
.append(objId).append("\"");
if (!isNew) {
return buf.append("}").toString();
}
else {
doMarshall(buf.append(",\"").append(SerializationParts.QUALIFIED_VALUE).append("\":"), o, ctx);
return buf.append("}").toString();
}
}
public abstract void doMarshall(StringBuilder buf, C o, MarshallingSession ctx);
@Override
public C demarshall(EJValue o, MarshallingSession ctx) {
EJObject obj = o.isObject();
if (obj == null) {
return doDemarshall(o, ctx);
}
String objId = obj.get(SerializationParts.OBJECT_ID).isString().stringValue();
if (ctx.hasObjectHash(objId)) {
return (C) ctx.getObject(Object.class, objId);
}
C val = doDemarshall(o, ctx);
ctx.recordObjectHash(objId, val);
return val;
}
public abstract C doDemarshall(EJValue o, MarshallingSession ctx);
}