/*
* Copyright 2012-2014 the original author or authors.
*
* 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 org.lightadmin.core.storage.strategy.file.command;
import org.lightadmin.core.storage.strategy.file.FilePathResolver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.data.mapping.PersistentProperty;
import java.io.File;
import static org.apache.commons.io.FileUtils.deleteQuietly;
import static org.apache.commons.io.FileUtils.sizeOfDirectory;
/**
* TODO: Document me!
*
* @author Maxim Kharchenko (kharchenko.max@gmail.com)
*/
public class ReferenceFileDeletionCommand extends ReferenceFileCommand {
private static final Logger logger = LoggerFactory.getLogger(ReferenceFileDeletionCommand.class);
private final ReferenceFileExistsCommand referenceFileExistsCommand;
public ReferenceFileDeletionCommand(FilePathResolver pathResolver) {
super(pathResolver);
this.referenceFileExistsCommand = new ReferenceFileExistsCommand(pathResolver);
}
public void execute(Object entity, PersistentProperty persistentProperty) {
logger.info("Performing delete operation on @FileReference property {}", persistentProperty.getName());
if (hasNoReferencedFile(entity, persistentProperty)) {
return;
}
boolean fileDeleted = deleteFile(entity, persistentProperty);
if (fileDeleted) {
resetPropertyValue(entity, persistentProperty);
deletePropertyFileDirectory(entity, persistentProperty);
}
}
private boolean hasNoReferencedFile(Object entity, PersistentProperty persistentProperty) {
return !referenceFileExistsCommand.execute(entity, persistentProperty);
}
private boolean deleteFile(Object entity, PersistentProperty persistentProperty) {
File referencedFile = pathResolver.persistentPropertyFileReference(entity, persistentProperty);
logger.info("Deleting property-related file {}", referencedFile.getAbsolutePath());
return deleteQuietly(referencedFile);
}
private void deletePropertyFileDirectory(Object entity, PersistentProperty persistentProperty) {
File directoryToRemove = pathResolver.persistentPropertyFileDirectory(entity, persistentProperty);
logger.info("Deleting property-related directory {}", directoryToRemove.getAbsolutePath());
removeDirectoryIfEmpty(directoryToRemove);
}
private boolean removeDirectoryIfEmpty(File domainEntityDirectory) {
if (!domainEntityDirectory.exists()) {
return false;
}
if (sizeOfDirectory(domainEntityDirectory) == 0) {
return false;
}
return deleteQuietly(domainEntityDirectory);
}
}