/*
* Copyright 2011-2013 HTTL Team.
*
* 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 httl.spi.loaders;
import httl.Resource;
import httl.spi.Loader;
import httl.spi.loaders.resources.ZipResource;
import httl.util.UrlUtils;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
import java.util.zip.ZipFile;
/**
* ZipLoader. (SPI, Singleton, ThreadSafe)
*
* @see httl.spi.engines.DefaultEngine#setLoader(Loader)
*
* @author Liang Fei (liangfei0201 AT gmail DOT com)
*/
public class ZipLoader extends AbstractLoader {
private File file;
public void setTemplateDirectory(String directory) {
file = new File(directory);
}
private File getAndCheckFile() {
if (file == null) {
throw new IllegalStateException("zip loader file == null. Please add config in your httl.properties: template.directory=foo.zip");
}
return file;
}
protected List<String> doList(String directory, String suffix) throws IOException {
ZipFile zipFile = new ZipFile(getAndCheckFile());
try {
return UrlUtils.listZip(zipFile, suffix);
} finally {
zipFile.close();
}
}
public Resource doLoad(String name, Locale locale, String encoding, String path) throws IOException {
return new ZipResource(getEngine(), name, locale, encoding, getAndCheckFile());
}
public boolean doExists(String name, Locale locale, String path) throws IOException {
if (file != null && file.exists()) {
ZipFile zipFile = new ZipFile(file);
try {
return zipFile.getEntry(name) != null;
} finally {
zipFile.close();
}
}
return false;
}
}