/*
* 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.common.client.util.Base64Util;
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;
/**
* Used to wrap marshallers annotated with {@link org.jboss.errai.marshalling.client.api.annotations.AlwaysQualify}
*
* @author Mike Brock
* @author Christian Sadilek <csadilek@redhat.com>
*/
public class QualifyingMarshallerWrapper<T> extends AbstractNullableMarshaller<T> {
private final Marshaller<T> delegate;
public QualifyingMarshallerWrapper(final Marshaller<T> delegate) {
this.delegate = delegate;
}
@Override
public Class<T> getTypeHandled() {
return delegate.getTypeHandled();
}
@Override
public T[] getEmptyArray() {
return delegate.getEmptyArray();
}
@Override
public T doNotNullDemarshall(final EJValue o, final MarshallingSession ctx) {
final EJObject obj = o.isObject();
if (obj != null) {
final String objId = obj.get(SerializationParts.OBJECT_ID).isString().stringValue();
if (ctx.hasObject(objId)) {
// noinspection unchecked
return (T) ctx.getObject(Object.class, objId);
}
EJValue val = obj.get(SerializationParts.QUALIFIED_VALUE);
if (val.isNull()) {
val = o;
}
return ctx.recordObject(objId, delegate.demarshall(val, ctx));
}
else {
// This is only to support Jackson's char[] and byte[] representations
if (o.isString() != null) {
if (getTypeHandled().equals(byte.class)) {
return (T) Base64Util.decode(o.isString().stringValue());
}
else if (getTypeHandled().equals(char.class)) {
return (T) o.isString().stringValue().toCharArray();
}
}
}
return null;
}
@Override
public String doNotNullMarshall(final T o, final MarshallingSession ctx) {
final boolean isNew = !ctx.hasObject(o);
final StringBuilder buf = new StringBuilder("{\"").append(SerializationParts.ENCODED_TYPE).append("\":\"")
.append(o.getClass().getName()).append("\",\"").append(SerializationParts.OBJECT_ID).append("\":\"")
.append(ctx.getObject(o)).append("\"");
if (!isNew) {
return buf.append("}").toString();
}
else {
return buf.append(",\"").append(SerializationParts.QUALIFIED_VALUE).append("\":").append(
delegate.marshall(o, ctx))
.append("}").toString();
}
}
}