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 java.util.regex.Pattern;
  
  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;
  
  
  /**
   * Removes multi line comments from processed resource.
   *
   * @author Alex Objelean
   * @created Created on Nov 28, 2008
   */
  public class MultiLineCommentStripperProcessor
    implements ResourcePreProcessor, ResourcePostProcessor {
    /**
     * Pattern containing a regex matching multiline comments & empty new lines.
     */
    public static final Pattern PATTERN = Pattern.compile(WroUtil.loadRegexpWithKey("comment.multiline"));
    public static final String ALIAS = "multilineStripper";
  
  
    /**
     * {@inheritDoc}
     */
    public void process(final Resource resource, final Reader source, final Writer destination)
      throws IOException {
      try {
        final String content = IOUtils.toString(source);
        String result = PATTERN.matcher(content).replaceAll("");
        result = WroUtil.EMTPY_LINE_PATTERN.matcher(result).replaceAll("");
        destination.write(result);
      } finally {
        source.close();
        destination.close();
      }
    }
  
  
    /**
     * {@inheritDoc}
     */
    public void process(final Reader reader, final Writer writer)
      throws IOException {
      // resourceUri doesn't matter
      process(null, reader, writer);
    }
  }
  