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  * Development and Distribution License("CDDL") (collectively, the

  * "License"). You may not use this file except in compliance with the

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  * http://www.netbeans.org/cddl-gplv2.html

  * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

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  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the GPL Version 2 section of the License file that

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  * License Header, with the fields enclosed by brackets [] replaced by

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  * Contributor(s):

  *

  * The Original Software is NetBeans. The Initial Developer of the Original

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 package org.apidesign.html.json.spi;

 import java.io.IOException;

 import java.io.OutputStream;

 import net.java.html.BrwsrCtx;

 import org.netbeans.html.json.impl.JSON;

 import org.netbeans.html.json.impl.RcvrJSON;

 /** Description of a JSON call request that is supposed to be processed

  * by {@link Transfer#loadJSON(org.apidesign.html.json.spi.JSONCall)} implementors.

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 public final class JSONCall {

     private final RcvrJSON whenDone;

     private final String urlBefore;

     private final String urlAfter;

     private final String method;

     private final Object data;

     private final BrwsrCtx ctx;

     JSONCall(BrwsrCtx ctx, RcvrJSON whenDone, String urlBefore, String urlAfter, String method, Object data) {

         this.ctx = ctx;

         this.whenDone = whenDone;

         this.urlBefore = urlBefore;

         this.urlAfter = urlAfter;

         this.method = method;

         this.data = data;

     }

     /** Do we have some data to send? Can the {@link #writeData(java.io.OutputStream)} method be 

      * called?

      * 

      * @return true, if the call has some data to send

      */

     public boolean isDoOutput() {

         return this.data != null;

     }

     public void writeData(OutputStream os) throws IOException {

         if (this.data == null) {

             throw new IOException("No data!");

         }

         os.write(this.data.toString().getBytes("UTF-8"));

         os.flush();

     }

     public String getMethod() {

         return method;

     }

     public boolean isJSONP() {

         return urlAfter != null;

     }

     public String composeURL(String jsonpCallback) {

         if ((urlAfter == null) != (jsonpCallback == null)) {

             throw new IllegalStateException();

         }

         if (urlAfter != null) {

             return urlBefore + jsonpCallback + urlAfter;

         } else {

             return urlBefore;

         }

     }

     public void notifySuccess(Object result) {

         if (result == null) {

             dispatch(RcvrJSON.MsgEvnt.createOpen());

         } else {

             dispatch(RcvrJSON.MsgEvnt.createMessage(result));

         }

     }

     public void notifyError(Throwable error) {

         if (error == null) {

             dispatch(RcvrJSON.MsgEvnt.createClose());

         } else {

             dispatch(RcvrJSON.MsgEvnt.createError(error));

         }

     }

     private void dispatch(final RcvrJSON.MsgEvnt ev) {

         JSON.runInBrowser(ctx, new Runnable() {

             @Override

             public void run() {

                 ev.dispatch(whenDone);

             }

         });

     }

     public String getMessage() {

         return this.data.toString();

     }

 }