| /* |
| * 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.tools.ant.util.depend.bcel; |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.Enumeration; |
| import java.util.Hashtable; |
| import java.util.Vector; |
| import org.apache.bcel.classfile.ClassParser; |
| import org.apache.bcel.classfile.JavaClass; |
| import org.apache.tools.ant.util.depend.AbstractAnalyzer; |
| |
| /** |
| * A dependency analyzer which returns superclass and superinterface |
| * dependencies. |
| * |
| */ |
| public class AncestorAnalyzer extends AbstractAnalyzer { |
| |
| /** |
| * Default constructor |
| * |
| * Causes the BCEL classes to load to ensure BCEL dependencies can |
| * be satisfied |
| */ |
| public AncestorAnalyzer() { |
| // force BCEL classes to load now |
| try { |
| new ClassParser("force"); |
| } catch (IOException e) { |
| // ignore |
| } |
| } |
| |
| /** |
| * Determine the dependencies of the configured root classes. |
| * |
| * @param files a vector to be populated with the files which contain |
| * the dependency classes |
| * @param classes a vector to be populated with the names of the |
| * depencency classes. |
| */ |
| protected void determineDependencies(Vector files, Vector classes) { |
| // we get the root classes and build up a set of |
| // classes upon which they depend |
| Hashtable dependencies = new Hashtable(); |
| Hashtable containers = new Hashtable(); |
| Hashtable toAnalyze = new Hashtable(); |
| Hashtable nextAnalyze = new Hashtable(); |
| for (Enumeration e = getRootClasses(); e.hasMoreElements();) { |
| String classname = (String) e.nextElement(); |
| toAnalyze.put(classname, classname); |
| } |
| |
| int count = 0; |
| int maxCount = isClosureRequired() ? MAX_LOOPS : 2; |
| while (toAnalyze.size() != 0 && count++ < maxCount) { |
| nextAnalyze.clear(); |
| for (Enumeration e = toAnalyze.keys(); e.hasMoreElements();) { |
| String classname = (String) e.nextElement(); |
| dependencies.put(classname, classname); |
| try { |
| File container = getClassContainer(classname); |
| if (container == null) { |
| continue; |
| } |
| containers.put(container, container); |
| |
| ClassParser parser = null; |
| if (container.getName().endsWith(".class")) { |
| parser = new ClassParser(container.getPath()); |
| } else { |
| parser = new ClassParser(container.getPath(), |
| classname.replace('.', '/') + ".class"); |
| } |
| |
| JavaClass javaClass = parser.parse(); |
| String[] interfaces = javaClass.getInterfaceNames(); |
| for (int i = 0; i < interfaces.length; ++i) { |
| String interfaceName = interfaces[i]; |
| if (!dependencies.containsKey(interfaceName)) { |
| nextAnalyze.put(interfaceName, interfaceName); |
| } |
| } |
| |
| if (javaClass.isClass()) { |
| String superClass = javaClass.getSuperclassName(); |
| if (!dependencies.containsKey(superClass)) { |
| nextAnalyze.put(superClass, superClass); |
| } |
| } |
| } catch (IOException ioe) { |
| // ignore |
| } |
| } |
| |
| Hashtable temp = toAnalyze; |
| toAnalyze = nextAnalyze; |
| nextAnalyze = temp; |
| } |
| |
| files.removeAllElements(); |
| for (Enumeration e = containers.keys(); e.hasMoreElements();) { |
| files.addElement((File) e.nextElement()); |
| } |
| |
| classes.removeAllElements(); |
| for (Enumeration e = dependencies.keys(); e.hasMoreElements();) { |
| classes.addElement((String) e.nextElement()); |
| } |
| } |
| |
| /** |
| * Indicate if this analyzer can determine dependent files. |
| * |
| * @return true if the analyzer provides dependency file information. |
| */ |
| protected boolean supportsFileDependencies() { |
| return true; |
| } |
| |
| } |
| |