package com.greenscriptool.utils;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.mozilla.javascript.ErrorReporter;
import org.mozilla.javascript.EvaluatorException;
import com.greenscriptool.ResourceType;
import com.yahoo.platform.yui.compressor.CssCompressor;
import com.yahoo.platform.yui.compressor.JavaScriptCompressor;
/**
* Implement {@link ICompressor} using YUI compressor library
*
* @author greenlaw110@gmail.com
* @version 1.0, 2010-10-16
* @since 1.0
*/
public class YUICompressor implements ICompressor {
private static Log logger_ = LogFactory.getLog(ICompressor.class);
private ResourceType type_;
public YUICompressor(ResourceType type) {
type_ = type;
}
@Override
public void compress(Reader r, Writer w) throws Exception {
try {
switch (type_) {
case CSS:
new CssCompressor(r).compress(w, -1);
break;
case JS:
new JavaScriptCompressor(r, er_).compress(w, -1, true, false, false, false);
break;
default:
throw new RuntimeException("Resource type not recognized: " + type_.name());
}
} finally {
if (null != r) {
try {
r.close();
} catch (IOException e) {
logger_.warn("error closing file: ", e);
}
}
}
}
private static ErrorReporter er_ = new ErrorReporter() {
public void warning(String message, String sourceName, int line, String lineSource, int lineOffset) {
if (line < 0) {
logger_.warn("[MINIMIZOR.WARNING] " + message);
} else {
logger_.warn(String.format("[MINIMIZOR.WARNING] %1$s: %2$s: %3$s", line, lineOffset, message));
}
}
public void error(String message, String sourceName, int line, String lineSource, int lineOffset) {
if (line < 0) {
logger_.error("[MINIMIZOR.ERROR] " + message);
} else {
logger_.error(String.format("[MINIMIZOR.ERROR] %1$s: %2$s: %3$s", line, lineOffset, message));
}
}
public EvaluatorException runtimeError(String message, String sourceName, int line,
String lineSource, int lineOffset) {
error(message, sourceName, line, lineSource, lineOffset);
return new EvaluatorException(message);
}
};
}