/*
* Copyright 2011 <a href="mailto:lincolnbaxter@gmail.com">Lincoln Baxter, III</a>
*
* 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.ocpsoft.rewrite.transform.minify;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import org.ocpsoft.rewrite.servlet.http.event.HttpServletRewrite;
import org.ocpsoft.rewrite.transform.Transformer;
import com.yahoo.platform.yui.compressor.CssCompressor;
/**
*
* A {@link Transformer} implementation that compresses CSS using yuicompressor.
*
* @author Christian Kaltepoth
*/
public class CssMinify extends Minify implements Transformer
{
CssMinify()
{}
@Override
public void transform(HttpServletRewrite event, InputStream input, OutputStream output) throws IOException
{
// prepare input reader
Reader reader = new InputStreamReader(input, getCharset());
CssCompressor compressor = new CssCompressor(reader);
// write compressed output
OutputStreamWriter writer = new OutputStreamWriter(output, getCharset());
compressor.compress(writer, 0);
writer.flush();
}
}