/*
    * 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.commons.jci.stores;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.commons.io.IOUtils;
  
  
  /**
   * Stores the results on disk
   * 
   * @author tcurdt
   */
  public final class FileResourceStore implements ResourceStore {
  
      private final File root;
  
      public FileResourceStore( final File pFile ) {
          root = pFile;
      }
      
      public byte[] read( final String pResourceName ) {
          InputStream is = null;
          try {
              is = new FileInputStream(getFile(pResourceName));
              final byte[] data = IOUtils.toByteArray(is);
              return data;
          } catch (Exception e) {
              return null;
          } finally {
              IOUtils.closeQuietly(is);
          }
      }
      
      public void write( final String pResourceName, final byte[] pData ) {
          OutputStream os = null;
          try {
              final File file = getFile(pResourceName);
              final File parent = file.getParentFile();
              if (!parent.mkdirs() && !parent.isDirectory()) {
                      throw new IOException("could not create" + parent);
              }
              os = new FileOutputStream(file);
              os.write(pData);
          } catch (Exception e) {
              // FIXME: now what?
          } finally {
              IOUtils.closeQuietly(os);
          }
      }
  
      public void remove( final String pResourceName ) {
          getFile(pResourceName).delete();
      }
  
      private File getFile( final String pResourceName ) {
          final String fileName = pResourceName.replace('/', File.separatorChar);
          return new File(root, fileName);
      }
  
      /**
       * @deprecated
       */
      @Deprecated
      public String[] list() {
          final List<String> files = new ArrayList<String>();
          list(root, files);
          return files.toArray(new String[files.size()]);
      }
  
      /**
       * @deprecated
       */
      @Deprecated
      private void list(final File pFile, final List<String> pFiles) {
          if (pFile.isDirectory()) {
             final File[] directoryFiles = pFile.listFiles();
             for (int i=0; i < directoryFiles.length; i++) {
                 list(directoryFiles[i], pFiles);
             }
         } else {
             pFiles.add(pFile.getAbsolutePath().substring(root.getAbsolutePath().length()+1));
         }
     }
     
     @Override
     public String toString() {
         return this.getClass().getName() + root.toString();
     }
 
 }