/*
* 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;
import org.lightadmin.core.config.LightAdminConfiguration;
import org.lightadmin.core.config.domain.DomainTypeAdministrationConfiguration;
import org.lightadmin.core.config.domain.GlobalAdministrationConfiguration;
import org.lightadmin.core.storage.strategy.binary.BinaryFileManipulationStrategy;
import org.lightadmin.core.storage.strategy.file.FilePathResolver;
import org.lightadmin.core.storage.strategy.file.ReferenceFileManipulationStrategy;
import org.lightadmin.core.storage.strategy.file.ReferenceFilePathResolver;
import org.springframework.data.mapping.PersistentEntity;
import org.springframework.data.mapping.PersistentProperty;
import org.springframework.util.ClassUtils;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import static org.lightadmin.core.persistence.metamodel.PersistentPropertyType.isOfBinaryFileType;
import static org.lightadmin.core.persistence.metamodel.PersistentPropertyType.isOfFileReferenceType;
/**
* TODO: Document me!
*
* @author Maxim Kharchenko (kharchenko.max@gmail.com)
*/
public class FileManipulationStrategyFactory {
private static final NoopFileManipulationStrategy NOOP_FILE_MANIPULATION_STRATEGY = new NoopFileManipulationStrategy();
private final GlobalAdministrationConfiguration configuration;
private final LightAdminConfiguration lightAdminConfiguration;
public FileManipulationStrategyFactory(GlobalAdministrationConfiguration configuration, LightAdminConfiguration lightAdminConfiguration) {
this.lightAdminConfiguration = lightAdminConfiguration;
this.configuration = configuration;
}
public FileManipulationStrategy createForFileProperty(PersistentProperty persistentProperty) {
PersistentEntity persistentEntity = persistentProperty.getOwner();
if (isOfBinaryFileType(persistentProperty)) {
return createBinaryFileManipulationStrategy();
}
if (isOfFileReferenceType(persistentProperty)) {
return createReferenceFileManipulationStrategy(persistentEntity);
}
return NOOP_FILE_MANIPULATION_STRATEGY;
}
private FileManipulationStrategy createReferenceFileManipulationStrategy(PersistentEntity persistentEntity) {
File fileStorageDirectory = lightAdminConfiguration.getFileStorageDirectory();
DomainTypeAdministrationConfiguration domainTypeAdministrationConfiguration = configuration.forManagedDomainType(ClassUtils.getUserClass(persistentEntity.getType()));
String domainTypeName = domainTypeAdministrationConfiguration.getDomainTypeName();
FilePathResolver pathResolver = new ReferenceFilePathResolver(fileStorageDirectory, persistentEntity, domainTypeName);
return new ReferenceFileManipulationStrategy(pathResolver);
}
private BinaryFileManipulationStrategy createBinaryFileManipulationStrategy() {
return new BinaryFileManipulationStrategy();
}
private static class NoopFileManipulationStrategy implements FileManipulationStrategy {
@Override
public void deleteFile(Object entity, PersistentProperty persistentProperty) {
}
@Override
public boolean fileExists(Object entity, PersistentProperty persistentProperty) throws IOException {
return false;
}
@Override
public byte[] loadFile(Object entity, PersistentProperty persistentProperty) throws IOException {
return new byte[0];
}
@Override
public long copyFile(Object entity, PersistentProperty persistentProperty, OutputStream outputStream) throws IOException {
return 0l;
}
@Override
public void saveFile(Object entity, PersistentProperty persistentProperty, Object value) throws IOException {
}
@Override
public void cleanup(Object entity, PersistentProperty persistentProperty) throws IOException {
}
}
}