/*
* 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.bus.client.json;
import com.google.gwt.core.client.GWT;
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.ErraiBus;
import org.jboss.errai.bus.client.api.Message;
import org.jboss.errai.bus.client.api.QueueSession;
import org.jboss.errai.bus.client.api.SessionEndListener;
import org.jboss.errai.bus.client.api.base.CommandMessage;
import org.jboss.errai.bus.client.framework.MarshalledMessage;
import org.jboss.errai.bus.client.framework.RequestDispatcher;
import org.jboss.errai.common.client.api.ResourceProvider;
import org.jboss.errai.marshalling.client.MarshallingSessionProviderFactory;
import org.jboss.errai.marshalling.client.api.json.impl.gwt.GWTJSON;
import org.jboss.errai.marshalling.client.marshallers.ErraiProtocolEnvelopeNoAutoMarshaller;
import org.jboss.errai.marshalling.client.protocols.ErraiProtocol;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class JSONUtilCli {
private static boolean autoDemarshall = true;
public static List<MarshalledMessage> decodePayload(String value) {
if (value == null || value.trim().length() == 0) return Collections.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 = null;
try {
val = JSONParser.parseStrict(value);
}
catch (ClassCastException e) {
if (!GWT.isProdMode()) {
System.out.println("*** working around devmode bug ***");
val = JSONParser.parseStrict(value);
}
}
if (val == null) {
return Collections.emptyList();
}
JSONArray arr = val.isArray();
if (arr == null) {
throw new RuntimeException("unrecognized payload" + val.toString());
}
ArrayList<MarshalledMessage> list = new ArrayList<MarshalledMessage>();
unwrap(list, arr);
return list;
}
private static void unwrap(List<MarshalledMessage> messages, JSONArray val) {
for (int i = 0; i < val.size(); i++) {
JSONValue v = val.get(i);
if (v.isArray() != null) {
unwrap(messages, v.isArray());
}
else {
messages.add(new MarshalledMessageImpl((JSONObject) v));
}
}
}
public static class MarshalledMessageImpl implements MarshalledMessage {
public final 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> decodePayload(Object value) {
if (value == null) {
return null;
}
if (!(value instanceof JSONObject)) {
throw new RuntimeException("bad payload: " + value);
}
if (autoDemarshall) {
return ErraiProtocol.decodePayload(GWTJSON.wrap((JSONObject) value));
}
else {
nativeLog("using no-auto envelope demarshaller");
return ErraiProtocolEnvelopeNoAutoMarshaller.INSTANCE.demarshall(
GWTJSON.wrap((JSONObject) value), MarshallingSessionProviderFactory.getEncoding());
}
}
private static final QueueSession clientSession = new QueueSession() {
private Map<String, Object> attributes = new HashMap<String, Object>();
@Override
public String getSessionId() {
return "<InBus>";
}
@Override
public boolean isValid() {
return true;
}
@Override
public boolean endSession() {
return false;
}
@Override
public void setAttribute(String attribute, Object value) {
attributes.put(attribute, value);
}
@Override
public <T> T getAttribute(Class<T> type, String attribute) {
return (T) attributes.get(attribute);
}
@Override
public Collection<String> getAttributeNames() {
return attributes.keySet();
}
@Override
public boolean hasAttribute(String attribute) {
return attributes.containsKey(attribute);
}
@Override
public boolean removeAttribute(String attribute) {
return attributes.remove(attribute) != null;
}
@Override
public void addSessionEndListener(SessionEndListener listener) {
}
};
public static QueueSession getClientSession() {
return clientSession;
}
private static final ResourceProvider<RequestDispatcher> requestDispatcherProvider
= new ResourceProvider<RequestDispatcher>() {
@Override
public RequestDispatcher get() {
return ErraiBus.getDispatcher();
}
};
public static Message decodeCommandMessage(Object value) {
CommandMessage msg = CommandMessage.createWithParts(decodePayload(value));
msg.setResource(RequestDispatcher.class.getName(), requestDispatcherProvider);
msg.setResource("Session", clientSession);
return msg;
}
public static void setAutoDemarshall(boolean autoDemarshall1) {
autoDemarshall = autoDemarshall1;
}
private static native void nativeLog(String message) /*-{
window.console.log(message);
}-*/;
}