/*
* JBoss, Home of Professional Open Source
* Copyright 2013, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.richfaces.resource.optimizer.resource.writer.impl;
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 java.io.Writer;
import java.nio.charset.Charset;
import com.google.common.io.ByteSink;
import com.google.common.io.ByteSource;
import org.richfaces.log.Logger;
import org.richfaces.resource.optimizer.resource.writer.ResourceProcessor;
import com.yahoo.platform.yui.compressor.JavaScriptCompressor;
/**
* @author Nick Belaevski
*/
public class JavaScriptCompressingProcessor implements ResourceProcessor {
private Charset charset;
private Logger log;
public JavaScriptCompressingProcessor(Charset charset, Logger log) {
this.charset = charset;
this.log = log;
}
@Override
public boolean isSupportedFile(String name) {
return name.endsWith(".js");
}
@Override
public void process(String outputName, ByteSource byteSource,
ByteSink byteSink, boolean closeAtFinish) throws IOException {
process(outputName, byteSource.openStream(), byteSink.openStream(), closeAtFinish);
}
@Override
public void process(String outputName, InputStream in, OutputStream out, boolean closeAtFinish) throws IOException {
Reader reader = null;
Writer writer = null;
try {
reader = new InputStreamReader(in, charset);
writer = new OutputStreamWriter(out, charset);
MavenLogErrorReporter reporter = new MavenLogErrorReporter(outputName);
new JavaScriptCompressor(reader, reporter).compress(writer, 0, true, true, false, false);
if (!closeAtFinish) {
// add semicolon to satisfy end of context of each script when packing files
writer.write(";");
writer.flush();
}
if (reporter.hasErrors() && log.isErrorEnabled()) {
log.error(reporter.getErrorsLog());
}
if (reporter.hasWarnings() && log.isDebugEnabled()) {
log.debug(reporter.getWarningsLog());
}
} finally {
try {
reader.close();
} catch (IOException e) {
// Swallow
}
if (closeAtFinish) {
try {
writer.close();
} catch (IOException e) {
// Swallow
}
} else {
writer.flush();
}
}
}
}