/*
* Copyright (C) 2011 Red Hat, Inc. and/or its affiliates.
*
* 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.Marshaller;
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> implements Marshaller<C> {
@Override
public final String marshall(final C o, final MarshallingSession ctx) {
if (o == null) {
return "null";
}
return marshall(o, o.getClass().getName(), ctx);
}
public final String marshall(final C o, final String encodedType, final MarshallingSession ctx) {
if (o == null) {
return "null";
}
final boolean isNew = !ctx.hasObject(o);
final String objId = ctx.getObject(o);
final StringBuilder buf = new StringBuilder("{\"").append(SerializationParts.ENCODED_TYPE).append("\":\"")
.append(encodedType).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);
@SuppressWarnings("unchecked")
@Override
public C demarshall(final EJValue o, final MarshallingSession ctx) {
if (o.isNull()) {
return null;
}
final EJObject obj = o.isObject();
final String objId = obj.get(SerializationParts.OBJECT_ID).isString().stringValue();
if (ctx.hasObject(objId)) {
return (C) ctx.getObject(Object.class, objId);
}
final C val = doDemarshall(o, ctx);
ctx.recordObject(objId, val);
return val;
}
public abstract C doDemarshall(EJValue o, MarshallingSession ctx);
}