/*
* 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.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.Reference;
public class WidgetImplementationIntrospector {
private static final String WEB_REFERENCE_ANNOTATION = "//@Reference";
private AssemblyFactory assemblyFactory;
private WidgetImplementation widgetImplementation;
public WidgetImplementationIntrospector(AssemblyFactory assemblyFactory, WidgetImplementation widgetImplementation) {
this.widgetImplementation = widgetImplementation;
this.assemblyFactory = assemblyFactory;
}
/**
* Introspect the References of a given htmlWidget
* @return
*/
public List<Reference> getReferences() {
List<Reference> references = new ArrayList<Reference>();
URL htmlWidget = widgetImplementation.getLocationURL();
try {
Scanner scanner = new Scanner(htmlWidget.openStream());
while(scanner.hasNextLine()) {
String line = scanner.nextLine();
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){
references.add(reference);
}
}
}
}
} catch(Exception e) {
}
return references;
}
/**
* 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("=");
tokens = tokens[0].split(" ");
referenceName = tokens[tokens.length -1];
if(referenceName != null) {
reference = assemblyFactory.createReference();
reference.setName(referenceName);
}
return reference;
}
}