| /* |
| * 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. |
| */ |
| /* |
| * Contributor(s): Thomas Ball |
| */ |
| |
| import org.netbeans.modules.classfile.*; |
| import java.io.*; |
| import java.util.*; |
| |
| /** |
| * Closure: report all classes which this file references in one |
| * way or another. Note: this utility won't find classes which are |
| * dynamically loaded. |
| * |
| * @author Thomas Ball |
| */ |
| public class Closure { |
| String thisClass; |
| Set<String> closure; |
| |
| Closure(String spec) { |
| thisClass = spec; |
| } |
| |
| void buildClosure(boolean includeJDK) |
| throws IOException { |
| if (closure != null) |
| return; |
| closure = new HashSet<String>(); |
| Set<String> visited = new HashSet<String>(); |
| Stack<ClassName> stk = new Stack<ClassName>(); |
| ClassName thisCN = ClassName.getClassName(thisClass.replace('.', '/')); |
| stk.push(thisCN); |
| visited.add(thisCN.getExternalName()); |
| |
| while (!stk.empty()) { |
| // Add class to closure. |
| ClassName cn = (ClassName)stk.pop(); |
| InputStream is = findClassStream(cn.getType()); |
| if (is == null) { |
| System.err.println("couldn't find class: " + |
| cn.getExternalName()); |
| continue; |
| } |
| ClassFile cfile = new ClassFile(is); |
| closure.add(cfile.getName().getExternalName()); |
| |
| ConstantPool pool = cfile.getConstantPool(); |
| Iterator refs = pool.getAllClassNames().iterator(); |
| while (refs.hasNext()) { |
| ClassName cnRef = (ClassName)refs.next(); |
| String cname = cnRef.getExternalName(); |
| if (cname.indexOf('[') != -1) { |
| // skip arrays |
| } else if (!includeJDK && |
| (cname.startsWith("java.") || |
| cname.startsWith("javax.") || |
| cname.startsWith("sun.") || |
| cname.startsWith("com.sun.corba") || |
| cname.startsWith("com.sun.image") || |
| cname.startsWith("com.sun.java.swing") || |
| cname.startsWith("com.sun.naming") || |
| cname.startsWith("com.sun.security"))) { |
| // if directed, skip JDK references |
| } else { |
| boolean isNew = visited.add(cname); |
| if (isNew) |
| stk.push(cnRef); |
| } |
| } |
| } |
| } |
| |
| void dumpClosure(PrintStream out) { |
| Iterator iter = new TreeSet(closure).iterator(); |
| while (iter.hasNext()) |
| out.println((String)iter.next()); |
| } |
| |
| Iterator dependencies() { |
| return closure.iterator(); |
| } |
| |
| private InputStream findClassStream(String className) { |
| InputStream is = |
| ClassLoader.getSystemClassLoader().getResourceAsStream(className + ".class"); |
| return is; |
| } |
| |
| /** |
| * An error routine which displays the command line usage |
| * before exiting. |
| */ |
| public static void usage() { |
| System.err.println( |
| "usage: java Closure [-includejdk] <class> [ <class> ...]"); |
| System.exit(1); |
| } |
| |
| public static void main(String[] args) { |
| if (args.length == 0) |
| usage(); |
| |
| boolean includeJDK = false; |
| for (int i = 0; i < args.length; i++) { |
| if (args[i].equals("-includejdk")) |
| includeJDK = true; |
| else if (args[i].charAt(0) == '-') |
| usage(); |
| else { |
| try { |
| Closure c = new Closure(args[i]); |
| c.buildClosure(includeJDK); |
| c.dumpClosure(System.out); |
| } catch (IOException e) { |
| System.err.println("error accessing \"" + args[i] + |
| "\": " + e.toString()); |
| } |
| } |
| } |
| } |
| } |