/** * 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 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(); } }