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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.implementation.widget;
import java.net.URL;
import java.net.URLConnection;
import java.util.Scanner;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.Property;
import org.apache.tuscany.sca.assembly.Reference;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
/**
* A HTML Widget Introspector used to introspect references and property
* annotations in JavaScript code
*
* @version $Rev$ $Date$
*/
class WidgetImplementationIntrospector {
private static final String WEB_REFERENCE_ANNOTATION = "//@Reference";
private static final String WEB_PROPERTY_ANNOTATION = "//@Property";
private AssemblyFactory assemblyFactory;
private WidgetImplementation widgetImplementation;
WidgetImplementationIntrospector(ExtensionPointRegistry registry, WidgetImplementation widgetImplementation ) {
FactoryExtensionPoint modelFactories = registry.getExtensionPoint(FactoryExtensionPoint.class);
this.assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
this.widgetImplementation = widgetImplementation;
}
/**
* Introspect and populate a given widget implementation
*/
public void introspectImplementation() {
URL htmlWidget = widgetImplementation.getLocationURL();
try {
URLConnection connection = htmlWidget.openConnection();
connection.setUseCaches(false);
Scanner scanner = new Scanner(connection.getInputStream());
while(scanner.hasNextLine()) {
String line = scanner.nextLine();
if(line.contains(WEB_PROPERTY_ANNOTATION)) {
//process the next line, as it has the property info
if (scanner.hasNextLine()) {
Property property = processPropertyScript(scanner.nextLine());
if (property != null) {
widgetImplementation.getProperties().add(property);
}
}
} else if(line.contains(WEB_REFERENCE_ANNOTATION)) {
//process the next line, as it has the reference info
if (scanner.hasNextLine()) {
Reference reference = processReferenceScript(scanner.nextLine());
if(reference != null){
widgetImplementation.getReferences().add(reference);
}
}
}
}
} catch(Exception e) {
}
}
/**
* Process Property declaration in JavaScript code
* Supported ways:
* //@Property
* var locale = Property("locale");
*
* //@Property
* locale = Property("locale");
*
* @param scriptContent
* @return
*/
private Property processPropertyScript(String scriptContent) {
Property property = null;
String propertyName = null;
String tokens[] = scriptContent.split("=");
tokens = tokens[0].split(" ");
propertyName = tokens[tokens.length -1];
if(propertyName != null) {
property = assemblyFactory.createProperty();
property.setName(propertyName);
}
return property;
}
/**
* Process Reference declaration in JavaScript code
* Supported ways :
* //@Reference
* var catalog = new Reference("catalog");
*
* //@Reference
* catalog = new Reference("catalog");
*
* @param scriptContent
* @return
*/
private Reference processReferenceScript(String scriptContent) {
Reference reference = null;
String referenceName = null;
String tokens[] = scriptContent.split("=");
// find the string between the quotes
tokens = tokens[1].split("\"");
referenceName = tokens[1];
if(referenceName != null) {
reference = assemblyFactory.createReference();
reference.setName(referenceName);
}
return reference;
}
}
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