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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.
*/
/*
* 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.websocket.runtime;
import java.util.List;
import org.apache.tuscany.sca.interfacedef.Operation;
/**
* Generates javascript service proxies using the websocket API. This enables
* simulating SCA on the client side javascript. This is a stateful singleton.
*/
public class JavascriptGenerator {
private final static String CONTEXT = "this.WebsocketComponentContext";
private static final String LF = "\n";
private static StringBuilder builder = new StringBuilder();
/**
* Generate javascript code for one service and all it's operations. Add
* this to the state of the generator.
*/
public static void generateServiceProxy(String component, String service, List<Operation> operations, int port) {
if (builder.length() == 0) {
builder.append(CONTEXT).append("={};").append(LF);
}
builder.append("if(!" + CONTEXT + "." + component + ")" + CONTEXT + "." + component + "={};").append(LF);
builder.append(CONTEXT + "." + component + "." + service + "={};").append(LF);
for (Operation operation : operations) {
builder.append(
CONTEXT + "." + component + "." + service + "." + operation.getName() + "="
+ generateFunctionHeader(operation)).append(LF);
builder.append(generateFunctionContent(port, component, service, operation)).append(LF);
builder.append("};").append(LF);
}
}
private static String generateFunctionHeader(Operation operation) {
String header = "function(";
for (int i = 0; i < operation.getInputType().getLogical().size(); i++) {
if (i > 0)
header += ",";
header += "p" + i;
}
header += ") {";
return header;
}
private static String generateFunctionContent(int port, String component, String service, Operation operation) {
String content = "sendMessage(" + port + ",'" + component + "." + service + "." + operation.getName() + "',[";
for (int i = 0; i < operation.getInputType().getLogical().size(); i++) {
if (i > 0)
content += ",";
content += "p" + i;
}
content += "]);";
return content;
}
/**
* Get the state of the generator.
*/
public static String getServiceProxies() {
return builder.toString();
}
/**
* Reset the state of the generator.
*/
public static void clear() {
builder.setLength(0);
}
private JavascriptGenerator() {
}
}
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