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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.tuscany.sca.binding.comet.runtime.javascript;
import org.apache.tuscany.sca.assembly.ComponentService;
import org.apache.tuscany.sca.interfacedef.Operation;
/**
* Generates javascript proxies for the comet services.
*/
public class JavascriptGenerator {
/**
* Namespace for the Tuscany Comet Javascript toolkit.
*/
public static final String JS_NAMESPACE = "SCA";
/**
* Name for the SCA component context.
*/
private static final String COMPONENT_CONTEXT = "this.CometComponentContext";
/**
* Name for the object performing comet specific tasks.
*/
private static final String TUSCANY_COMET = "SCA.TuscanyComet";
private static StringBuffer javascript = new StringBuffer();
private JavascriptGenerator() {
}
public static StringBuffer getJavascript() {
return JavascriptGenerator.javascript;
}
/**
* Generates the javascript proxy for a service.
*
* @param service
* the service for which generation is performed
*/
public static void generateServiceProxy(final ComponentService service) {
JavascriptGenerator.javascript.append(JavascriptGenerator.COMPONENT_CONTEXT + "." + service.getName()
+ " = new Object();\n");
}
/**
* Generates the method inside the service proxy for the specified
* operation.
*
* @param service
* the service containing the operation
* @param operation
* the operation
*/
public static void generateMethodProxy(final ComponentService service, final Operation operation) {
JavascriptGenerator.javascript.append(JavascriptGenerator.COMPONENT_CONTEXT + "." + service.getName() + "."
+ operation.getName() + " = function(");
for (int i = 0; i < operation.getInputType().getLogical().size(); i++) {
JavascriptGenerator.javascript.append("p" + i + ", ");
}
JavascriptGenerator.javascript.append("callbackMethod) {\n");
// send method argumets as JSON array
JavascriptGenerator.javascript.append(" var params = [];\n");
for (int i = 0; i < operation.getInputType().getLogical().size(); i++) {
JavascriptGenerator.javascript.append(" params.push(p" + i + ");\n");
}
JavascriptGenerator.javascript.append(" " + JavascriptGenerator.TUSCANY_COMET + ".callAsync('"
+ service.getName() + "/" + operation.getName() + "', $.toJSON(params), callbackMethod);\n");
JavascriptGenerator.javascript.append("}\n");
}
}
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