/*
* Copyright 2010 JBoss, a divison 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.bus.client.json;
import com.google.gwt.json.client.JSONArray;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.json.client.JSONValue;
import org.jboss.errai.bus.client.api.Message;
import org.jboss.errai.bus.client.api.base.CommandMessage;
import org.jboss.errai.bus.client.framework.MarshalledMessage;
import org.jboss.errai.common.client.json.JSONDecoderCli;
import org.jboss.errai.common.client.json.JSONEncoderCli;
import java.util.ArrayList;
import java.util.Map;
public class JSONUtilCli {
private static final ArrayList<MarshalledMessage> EMPTYLIST = new ArrayList<MarshalledMessage>(0);
public static ArrayList<MarshalledMessage> decodePayload(String value) {
if (value == null || value.trim().length() == 0) return EMPTYLIST;
/**
* We have to do a two-stage decoding of the message. We cannot fully decode the message here, as we
* cannot be sure the destination endpoint exists within this Errai bundle. So we extract the ToSubject
* field and send the unparsed JSON object onwards.
*
*/
JSONValue val = JSONParser.parse(value);
if (val == null) {
return EMPTYLIST;
}
JSONArray arr = val.isArray();
if (arr == null) {
throw new RuntimeException("unrecognized payload" + val.toString());
}
ArrayList<MarshalledMessage> list = new ArrayList<MarshalledMessage>(arr.size());
for (int i = 0; i < arr.size(); i++) {
list.add(new MarshalledMessageImpl((JSONObject) arr.get(i)));
}
return list;
}
public static class MarshalledMessageImpl implements MarshalledMessage {
public JSONObject o;
public MarshalledMessageImpl(JSONObject o) {
this.o = o;
}
public Object getMessage() {
return o;
}
public String getSubject() {
return o.get("ToSubject").isString().stringValue();
}
}
@SuppressWarnings({"unchecked"})
public static Map<String, Object> decodeMap(Object value) {
return (Map<String, Object>) new JSONDecoderCli().decode(value);
}
public static Message decodeCommandMessage(Object value) {
return CommandMessage.createWithParts(decodeMap(value));
}
public static String encodeMap(Map<String, Object> map) {
return new JSONEncoderCli().encode(map);
}
}