RemoteCommandRenderer.java

/*
 * Copyright 2009-2014 PrimeTek.
 *
 * 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.primefaces.component.remotecommand;

import java.io.IOException;
import javax.faces.FacesException;

import javax.faces.component.UIComponent;
import javax.faces.component.UINamingContainer;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.event.ActionEvent;
import javax.faces.event.PhaseId;
import org.primefaces.component.api.AjaxSource;
import org.primefaces.context.RequestContext;

import org.primefaces.renderkit.CoreRenderer;
import org.primefaces.util.AjaxRequestBuilder;
import org.primefaces.util.ComponentUtils;

public class RemoteCommandRenderer extends CoreRenderer {

    @Override
    public void decode(FacesContext context, UIComponent component) {
        RemoteCommand command = (RemoteCommand) component;

        if(context.getExternalContext().getRequestParameterMap().containsKey(command.getClientId(context))) {
            ActionEvent event = new ActionEvent(command);
            if(command.isImmediate())
                event.setPhaseId(PhaseId.APPLY_REQUEST_VALUES);
            else
                event.setPhaseId(PhaseId.INVOKE_APPLICATION);

            command.queueEvent(event);
        }
    }

    @Override
    public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        RemoteCommand command = (RemoteCommand) component;
        AjaxSource source = (AjaxSource) command;
        String clientId = command.getClientId(context);
        String name = resolveName(command, context);
        UIComponent form = (UIComponent) ComponentUtils.findParentForm(context, command);
        if(form == null) {
            throw new FacesException("RemoteCommand '" + name + "'must be inside a form.");
        }
        
        AjaxRequestBuilder builder = RequestContext.getCurrentInstance().getAjaxRequestBuilder();
        
        String request = builder.init()
        				.source(clientId)
                        .form(form.getClientId(context))
                        .process(component, source.getProcess())
                        .update(component, source.getUpdate())
                        .async(source.isAsync())
                        .global(source.isGlobal())
                        .delay(source.getDelay())
                        .partialSubmit(source.isPartialSubmit(), command.isPartialSubmitSet())
                        .resetValues(source.isResetValues(), source.isResetValuesSet())
                        .ignoreAutoUpdate(source.isIgnoreAutoUpdate())
                        .onstart(source.getOnstart())
                        .onerror(source.getOnerror())
                        .onsuccess(source.getOnsuccess())
                        .oncomplete(source.getOncomplete())
                        .passParams()
                        .build();

        //script
        writer.startElement("script", command);
        writer.writeAttribute("type", "text/javascript", null);

        writer.write(name + " = function() {");
        writer.write(request);
        writer.write("}");
        
        if(command.isAutoRun()) {
            writer.write(";$(function() {");
            writer.write(name + "();");
            writer.write("});");
        }

        writer.endElement("script");
    }
    
    protected String resolveName(RemoteCommand command, FacesContext context) {
    	String userName = command.getName();
    
		if(userName != null)
			return userName;
		 else
			return "command_" + command.getClientId(context).replaceAll("-|" + UINamingContainer.getSeparatorChar(context), "_");
	}
}