/**
* Copyright 2010 Molindo GmbH
*
* 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.wicketstuff.mergedresources.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.StringReader;
import java.io.StringWriter;
import java.nio.charset.Charset;
import at.molindo.thirdparty.com.yahoo.platform.yui.compressor.CssCompressor;
public class YuiCompressorUtil {
private static final transient org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(YuiCompressorUtil.class);
private YuiCompressorUtil() {
// no instances
}
public static String compress(final String toCompress) {
final StringWriter writer = new StringWriter((int) (toCompress.length() * 0.8));
try {
new CssCompressor(new StringReader(toCompress)).compress(writer, 0);
} catch (final Exception e) {
log.warn("Could not compress merged CSS stream, using uncompressed content", e);
return toCompress;
}
return writer.toString();
}
public static byte[] compress(final byte[] toCompress, Charset charset) {
ByteArrayOutputStream out = new ByteArrayOutputStream(toCompress.length);
final OutputStreamWriter writer = new OutputStreamWriter(out);
try {
new CssCompressor(new InputStreamReader(new ByteArrayInputStream(toCompress), charset)).compress(writer, 0);
writer.flush();
writer.close();
} catch (final Exception e) {
log.warn("Could not compress merged CSS stream, using uncompressed content", e);
return toCompress;
}
return out.toByteArray();
}
}