/**
 *    Copyright 2011 meltmedia
 *
 *    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 org.xchain.framework.javascript;

import java.io.OutputStream;
import java.net.URL;

/**
 * Merge strategy for compresses one or more Java Script documents as well as merges them.
 * 
 * @author John Trimble
 */
public class CompressJavaScriptMergeStrategy implements IMergeStrategy {

  private int optimizationLevel;

  public CompressJavaScriptMergeStrategy(int optimizationLevel) {
    this.optimizationLevel = optimizationLevel;
  }
  
  public void merge(String manifestSystemId, OutputStream output) throws Exception {
    URL[] jsUrls = MergeUtil.parseManifest(manifestSystemId);
    JsCompressor compressor = new JsCompressor(optimizationLevel);
    compressor.compress(jsUrls, output);
  }

}