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ImportModule.java
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/
ImportModule.java
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/*
* Copyright 2013 Petr Kunc.
*
* 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 cz.muni.fi.lessappcache.parser.modules;
import cz.muni.fi.lessappcache.filesystem.PathUtils;
import cz.muni.fi.lessappcache.importer.Importer;
import cz.muni.fi.lessappcache.parser.ManifestParser;
import cz.muni.fi.lessappcache.parser.ParsingContext;
import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
import org.apache.log4j.Logger;
/**
* Handles import of other lesscache manifest files. If file is not found, throws {@link ModuleException}
*
* @author Petr Kunc
*/
public class ImportModule extends AbstractModule implements Module {
private final static Logger logger = Logger.getLogger(ImportModule.class.getName());
/**
* Constructs module and sets priority.
*/
public ImportModule() {
setPriority(6.0);
}
@Override
public ModuleOutput parse(String line, ParsingContext pc) throws ModuleException {
ModuleOutput output = new ModuleOutput();
if (line.startsWith("@import")) {
output.setControl(ModuleControl.STOP);
String url = line.replaceAll("(?i)^@import\\s+(.*)$", "$1");
Path base = PathUtils.isAbsoluteOrRemote(url) ? Paths.get("") : pc.getContext();
Path file = base.resolve(Paths.get(url));
if (Importer.isImported(file)) {
logger.warn("File "+file+" already imported. Skipping...");
return output;
}
ManifestParser mp = new ManifestParser(file);
try {
mp.getLoadedResources().putAll(pc.getLoadedResources());
mp.setMode(pc.getMode());
output.getOutput().addAll(mp.processFile());
output.setLoadedResources(mp.getLoadedResources());
output.setMode(mp.getMode());
} catch (IOException ex) {
logger.error("File " + file + " not found.");
throw new ModuleException(ex);
}
}
return output;
}
}