/*
* Copyright 2013 eXo Platform SAS
*
* 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 juzu.plugin.less4j.impl;
import com.github.sommeri.less4j.Less4jException;
import com.github.sommeri.less4j.LessCompiler;
import com.github.sommeri.less4j.LessSource;
import com.github.sommeri.less4j.core.ThreadUnsafeLessCompiler;
import juzu.asset.AssetLocation;
import juzu.impl.compiler.Message;
import juzu.impl.compiler.ProcessingException;
import juzu.impl.plugin.asset.Asset;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
/**
* @author Julien Viet
*/
public class LessAsset extends Asset {
private static String cssValue(String lessValue) {
int pos = lessValue.lastIndexOf('.');
if (pos == -1) {
return lessValue + ".css";
} else {
return lessValue.substring(0, pos) + ".css";
}
}
/** . */
private final String lessValue;
public LessAsset(
String id,
String lessValue,
List<String> depends,
Integer maxAge) {
super(id, "stylesheet", cssValue(lessValue), null, depends, AssetLocation.APPLICATION, maxAge, null);
//
this.lessValue = lessValue;
}
@Override
protected String getSource() {
return lessValue;
}
@Override
public InputStream open(String s, URLConnection resource) throws IOException {
LessCompiler compiler = new ThreadUnsafeLessCompiler();
try {
LessCompiler.CompilationResult result = compiler.compile(resource.getURL());
return new ByteArrayInputStream(result.getCss().getBytes());
}
catch (Less4jException e) {
List<LessCompiler.Problem> errors = e.getErrors();
ArrayList<Message> messages = new ArrayList<Message>(errors.size());
for (LessCompiler.Problem error : errors) {
String text = error.getMessage() != null ? error.getMessage() : "There is an error in your .less file";
String errorName = error.getType().name();
LessSource source = error.getSource();
Message msg;
if (source != null) {
msg = new Message(MetaModelPluginImpl.COMPILATION_ERROR, errorName, source.getName(), error.getLine(), text);
} else {
msg = new Message(MetaModelPluginImpl.GENERAL_PROBLEM, errorName, text);
}
MetaModelPluginImpl.log.info(msg.toDisplayString());
messages.add(msg);
}
throw new ProcessingException(messages);
}
}
}