/**
    * 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.File;
  import java.io.IOException;
  import java.util.*;
  
  class MainProcessor implements JarProcessor
  {
      private final boolean verbose;
      private final JarProcessorChain chain;
      private final KeepProcessor kp;
      private final Map<String, String> renames = new HashMap<String, String>();
      
      public MainProcessor(List<PatternElement> patterns, boolean verbose, boolean skipManifest) {
          this.verbose = verbose;
          List<Zap> zapList = new ArrayList<Zap>();
          List<Rule> ruleList = new ArrayList<Rule>();
          List<Keep> keepList = new ArrayList<Keep>();
          for (PatternElement pattern : patterns) {
              if (pattern instanceof Zap) {
                  zapList.add((Zap) pattern);
              } else if (pattern instanceof Rule) {
                  ruleList.add((Rule) pattern);
              } else if (pattern instanceof Keep) {
                  keepList.add((Keep) pattern);
              }
          }
  
          PackageRemapper pr = new PackageRemapper(ruleList, verbose);
          kp = keepList.isEmpty() ? null : new KeepProcessor(keepList);
  
          List<JarProcessor> processors = new ArrayList<JarProcessor>();
          if (skipManifest)
              processors.add(ManifestProcessor.getInstance());
          if (kp != null)
              processors.add(kp);
          processors.add(new ZapProcessor(zapList));
          processors.add(new JarTransformerChain(new RemappingClassTransformer[]{ new RemappingClassTransformer(pr) }));
          processors.add(new ResourceProcessor(pr));
          chain = new JarProcessorChain(processors.toArray(new JarProcessor[processors.size()]));
      }
  
      public void strip(File file) throws IOException {
          if (kp == null)
              return;
          Set<String> excludes = getExcludes();
          if (!excludes.isEmpty())
              StandaloneJarProcessor.run(file, file, new ExcludeProcessor(excludes, verbose));
      }
  
      /**
       * Returns the <code>.class</code> files to delete. As well the root-parameter as the rename ones
       * are taken in consideration, so that the concerned files are not listed in the result.
       *
       * @return the paths of the files in the jar-archive, including the <code>.class</code> suffix
       */
      private Set<String> getExcludes() {
          Set<String> result = new HashSet<String>();
          for (String exclude : kp.getExcludes()) {
              String name = exclude + ".class";
              String renamed = renames.get(name);
              result.add((renamed != null) ? renamed : name);
          }
          return result;
      }
  
      /**
       *
       * @param struct
       * @return <code>true</code> if the entry is to include in the output jar
       * @throws IOException
       */
      public boolean process(EntryStruct struct) throws IOException {
          String name = struct.name;
          boolean keepIt = chain.process(struct);
          if (keepIt) {
              if (!name.equals(struct.name)) {
                  if (kp != null)
                      renames.put(name, struct.name);
                  if (verbose)
                      System.err.println("Renamed " + name + " -> " + struct.name);
              }
         } else {
             if (verbose)
                 System.err.println("Removed " + name);
         }
         return keepIt;
     }
 }