/**
    * Copyright 2007 Google Inc.
    *
    * Licensed 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 com.tonicsystems.jarjar;
  
  import com.tonicsystems.jarjar.util.*;
  import java.io.*;
  import java.util.*;
  import java.util.zip.ZipEntry;
  import org.objectweb.asm.ClassReader;
  import org.objectweb.asm.ClassVisitor;
  
  public class DepFind
  {
      private File curDir = new File(System.getProperty("user.dir"));
  
      public void setCurrentDirectory(File curDir) {
          this.curDir = curDir;
      }
  
      public void run(String from, String to, DepHandler handler) throws IOException {
          try {
              ClassHeaderReader header = new ClassHeaderReader();
              Map<String, String> classes = new HashMap<String, String>();
              ClassPathIterator cp = new ClassPathIterator(curDir, to, null);
              try {
                while (cp.hasNext()) {
                  ClassPathEntry entry = cp.next();
                  InputStream in = entry.openStream();
                  try {
                    header.read(in);
                    classes.put(header.getClassName(), entry.getSource());
                  } catch (Exception e) {
                    System.err.println("Error reading " + entry.getName() + ": " + e.getMessage());
                  } finally {
                    in.close();
                  }
                }
              } finally {
                cp.close();
              }
  
              handler.handleStart();
              cp = new ClassPathIterator(curDir, from, null);
              try {
                while (cp.hasNext()) {
                  ClassPathEntry entry = cp.next();
                  InputStream in = entry.openStream();
                  try {
                    new ClassReader(in).accept(
                        new DepFindVisitor(classes, entry.getSource(), handler),
                        ClassReader.SKIP_DEBUG);
                  } catch (Exception e) {
                    System.err.println("Error reading " + entry.getName() + ": " + e.getMessage());
                  } finally {
                    in.close();
                  }
                }
              } finally {
                cp.close();
              }
              handler.handleEnd();
          } catch (RuntimeIOException e) {
              throw (IOException)e.getCause();
          }
      }
  }