Java tutorial
// Copyright 2013 The Apache Software Foundation // // 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.apache.tapestry5.internal.webresources; import com.yahoo.platform.yui.compressor.CssCompressor; import org.apache.commons.io.IOUtils; import org.apache.tapestry5.ioc.OperationTracker; import org.apache.tapestry5.ioc.internal.util.InternalUtils; import org.apache.tapestry5.services.assets.AssetChecksumGenerator; import org.apache.tapestry5.services.assets.StreamableResource; import org.slf4j.Logger; import java.io.*; /** * A wrapper around YUI Compressor. This module does not have a dependency on YUICompressor; * isntead a local copy of the YUICompressor CSS minimizer is kept (because the reset of YUICompressor * is painful to mix due to how it attempts to patch Rhino). */ public class CSSMinimizer extends AbstractMinimizer { public CSSMinimizer(Logger logger, OperationTracker tracker, AssetChecksumGenerator checksumGenerator) { super(logger, tracker, checksumGenerator, "text/css"); } @Override protected InputStream doMinimize(StreamableResource resource) throws IOException { StringWriter writer = new StringWriter(1000); Reader reader = new InputStreamReader(resource.openStream()); try { new CssCompressor(reader).compress(writer, -1); writer.flush(); return IOUtils.toInputStream(writer.getBuffer()); } finally { InternalUtils.close(reader); InternalUtils.close(writer); } } }