org.rstudio.core.client.jsonrpc.RpcResponse.java Source code

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Here is the source code for org.rstudio.core.client.jsonrpc.RpcResponse.java

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/*
 * RpcResponse.java
 *
 * Copyright (C) 2009-12 by RStudio, Inc.
 *
 * Unless you have received this program directly from RStudio pursuant
 * to the terms of a commercial license agreement with RStudio, then
 * this program is licensed to you under the terms of version 3 of the
 * GNU Affero General Public License. This program is distributed WITHOUT
 * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
 * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
 *
 */

package org.rstudio.core.client.jsonrpc;

import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.json.client.JSONValue;

public class RpcResponse extends JavaScriptObject {
    protected RpcResponse() {

    }

    public final static RpcResponse parse(String json) {
        try {
            // we first call parseStrict so we can use the browser
            // json parser (for performance) whenever possible)
            JSONValue val = JSONParser.parseStrict(json);
            return val.isObject().getJavaScriptObject().cast();
        } catch (Exception e) {
            try {
                // there are some cases where json emitted by our 
                // server isn't parsable by parseStrict (for example,
                // see bug #3025). for these situations we call 
                // parseLenient (which in turn calls eval)
                JSONValue val = JSONParser.parseLenient(json);
                return val.isObject().getJavaScriptObject().cast();
            } catch (Exception e2) {
                return null;
            }
        }
    }

    public final native static RpcResponse create(RpcError error) /*-{
                                                                  var response = new Object();
                                                                  response.error = error ;
                                                                  return response ;
                                                                  }-*/;

    public final RpcError getError() {
        return getField("error");
    }

    public final String getAsyncHandle() {
        return getField("asyncHandle");
    }

    public final <T> T getResult() {
        T field = this.<T>getField("result");
        return field;
    }

    private static Boolean wrapBoolean(boolean value) {
        return value;
    }

    public final native <T> T getField(String name) /*-{
                                                    var value = this[name];
                                                    if (typeof(value) == 'boolean')
                                                    return @org.rstudio.core.client.jsonrpc.RpcResponse::wrapBoolean(Z)(value);
                                                    return value;
                                                    }-*/;
}