ch.unifr.pai.twice.comm.serverPush.client.RemoteEventDeserializer.java Source code

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Here is the source code for ch.unifr.pai.twice.comm.serverPush.client.RemoteEventDeserializer.java

Source

package ch.unifr.pai.twice.comm.serverPush.client;

/*
 * Copyright 2013 Oliver Schmid
 * 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.
 */
import ch.unifr.pai.twice.authentication.client.security.MessagingException;
import ch.unifr.pai.twice.authentication.client.security.TWICESecurityManager;

import com.google.gwt.json.client.JSONObject;

/**
 * The deserializer for remote events. For convenience, we are using JSON as a message format - this could be replaced with more compact and compressed message
 * formats
 * 
 * @author Oliver Schmid
 * 
 */
public abstract class RemoteEventDeserializer {

    public final RemoteEvent<?> deserialize(String string, TWICESecurityManager security)
            throws MessagingException {
        com.google.gwt.json.client.JSONValue value = com.google.gwt.json.client.JSONParser.parseStrict(string);
        com.google.gwt.json.client.JSONObject o = value.isObject();
        if (o != null) {
            com.google.gwt.json.client.JSONValue type = o
                    .get(ch.unifr.pai.twice.comm.serverPush.client.RemoteEvent.EVENTTYPEKEY);
            String t = null;
            if (type != null && type.isString() != null) {
                t = type.isString().stringValue();
                return deserialize(o, t, string, security);
            }
        }
        return null;
    };

    protected abstract RemoteEvent<?> deserialize(JSONObject o, String type, String string,
            TWICESecurityManager security) throws MessagingException;
}