/*
* 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;
import com.google.common.base.Joiner;
import org.lightadmin.api.config.annotation.FileReference;
import org.springframework.beans.BeanWrapper;
import org.springframework.data.mapping.PersistentEntity;
import org.springframework.data.mapping.PersistentProperty;
import org.springframework.data.util.DirectFieldAccessFallbackBeanWrapper;
import java.io.File;
import static java.io.File.separator;
import static java.lang.String.valueOf;
import static org.apache.commons.io.FileUtils.getFile;
/**
* TODO: Document me!
*
* @author Maxim Kharchenko (kharchenko.max@gmail.com)
*/
public class ReferenceFilePathResolver implements FilePathResolver {
private static final String ROOT_DIRECTORY_NAME = "domain";
private static final String FILE_NAME = "file.bin";
private final PersistentEntity persistentEntity;
private final String domainTypeName;
private final File fileStorageDirectory;
public ReferenceFilePathResolver(File fileStorageDirectory, PersistentEntity persistentEntity, String domainTypeName) {
this.persistentEntity = persistentEntity;
this.domainTypeName = domainTypeName;
this.fileStorageDirectory = fileStorageDirectory;
}
@Override
public File persistentPropertyFileReference(Object entity, PersistentProperty persistentProperty) {
FileReference fileReference = fileReferenceAnnotation(persistentProperty);
String relativeFilePath = persistentPropertyFileRelativePath(entity, persistentProperty);
if (propertyBaseDirectoryExists(fileReference)) {
return getFile(fileReference.baseDirectory(), relativeFilePath);
}
return getFile(this.fileStorageDirectory, relativeFilePath);
}
@Override
public File persistentPropertyFileDirectory(Object entity, PersistentProperty persistentProperty) {
FileReference fileReference = fileReferenceAnnotation(persistentProperty);
if (propertyBaseDirectoryExists(fileReference)) {
return getFile(fileReference.baseDirectory(), persistentPropertyFileDirectoryRelativePath(entity, persistentProperty));
}
return getFile(this.fileStorageDirectory, persistentPropertyFileDirectoryRelativePath(entity, persistentProperty));
}
@Override
public String persistentPropertyFileRelativePath(Object entity, PersistentProperty persistentProperty) {
if (propertyValueFileExists(entity, persistentProperty)) {
return propertyValueAsString(entity, persistentProperty);
}
return Joiner.on(separator).join(persistentPropertyFileDirectoryRelativePath(entity, persistentProperty), FILE_NAME);
}
private boolean propertyValueFileExists(Object entity, PersistentProperty persistentProperty) {
FileReference fileReference = fileReferenceAnnotation(persistentProperty);
String propertyValue = propertyValueAsString(entity, persistentProperty);
File fileDirectory = propertyBaseDirectoryExists(fileReference) ? getFile(fileReference.baseDirectory()) : this.fileStorageDirectory;
File file = getFile(fileDirectory, propertyValue);
return file.isFile() && file.exists();
}
private String persistentPropertyFileDirectoryRelativePath(Object entity, PersistentProperty persistentProperty) {
return Joiner.on(separator).join(persistentEntityRootDirectoryRelativePath(entity), persistentProperty.getName());
}
private String persistentEntityRootDirectoryRelativePath(Object entity) {
return Joiner.on(separator).join("", ROOT_DIRECTORY_NAME, this.domainTypeName, idPropertyValue(entity));
}
private FileReference fileReferenceAnnotation(PersistentProperty persistentProperty) {
return (FileReference) persistentProperty.findAnnotation(FileReference.class);
}
private String idPropertyValue(Object entity) {
return propertyValueAsString(entity, this.persistentEntity.getIdProperty());
}
private String propertyValueAsString(Object entity, PersistentProperty persistentProperty) {
return valueOf(getPropertyValue(entity, persistentProperty));
}
private boolean propertyBaseDirectoryExists(FileReference fileReference) {
return getFile(fileReference.baseDirectory()).exists();
}
private Object getPropertyValue(Object entity, PersistentProperty persistentProperty) {
BeanWrapper beanWrapper = new DirectFieldAccessFallbackBeanWrapper(entity);
return beanWrapper.getPropertyValue(persistentProperty.getName());
}
}