content: /*
   * Copyright (c) 2008. All rights reserved.
   */
  package ro.isdc.wro.model.resource.processor.impl;
  
  import java.io.IOException;
  import java.io.Reader;
  import java.io.Writer;
  
  import org.apache.commons.io.IOUtils;
  
  import ro.isdc.wro.model.resource.Resource;
  import ro.isdc.wro.model.resource.processor.ResourcePostProcessor;
  import ro.isdc.wro.model.resource.processor.ResourcePreProcessor;
  import ro.isdc.wro.util.WroUtil;
  
  
  /**
   * CommentStripperProcessor. Removes both type of comments. It uses both: multi line & single line comment strippers.
   *
   * @author Alex Objelean
   * @created Created on Nov 28, 2008
   */
  public class CommentStripperProcessor
    implements ResourcePreProcessor, ResourcePostProcessor {
    /**
     * {@inheritDoc}
     */
    public void process(final Resource resource, final Reader reader, final Writer writer)
      throws IOException {
      try {
        final String content = IOUtils.toString(reader);
        // apply single line comment stripper processor first
        String result = SingleLineCommentStripperProcessor.PATTERN.matcher(content).replaceAll("");
        // apply multi line comment stripper processor after
        result = MultiLineCommentStripperProcessor.PATTERN.matcher(result).replaceAll("");
        result = WroUtil.EMTPY_LINE_PATTERN.matcher(result).replaceAll("");
        writer.write(result);
      } finally {
        reader.close();
        writer.close();
      }
    }
  
  
    /**
     * {@inheritDoc}
     */
    public void process(final Reader reader, final Writer writer)
      throws IOException {
      // resource Uri doesn't matter.
      process(null, reader, writer);
    }
  }
  