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MongoDB support for Spring Data
/*
* Copyright 2011 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.springframework.data.mongodb.gridfs;
import org.springframework.data.mongodb.core.query.Criteria;
/**
* GridFs-specific helper class to define {@link Criteria}s.
*
* @author Oliver Gierke
*/
public class GridFsCriteria extends Criteria {
/**
* Creates a new {@link GridFsCriteria} for the given key.
*
* @param key
*/
public GridFsCriteria(String key) {
super(key);
}
/**
* Creates a {@link GridFsCriteria} for restrictions on the file's metadata.
*
* @return
*/
public static GridFsCriteria whereMetaData() {
return new GridFsCriteria("metadata");
}
/**
* Creates a {@link GridFsCriteria} for restrictions on a single file's metadata item.
*
* @param metadataKey
* @return
*/
public static GridFsCriteria whereMetaData(String metadataKey) {
String extension = metadataKey == null ? "" : "." + metadataKey;
return new GridFsCriteria(String.format("metadata%s", extension));
}
/**
* Creates a {@link GridFsCriteria} for restrictions on the file's name.
*
* @return
*/
public static GridFsCriteria whereFilename() {
return new GridFsCriteria("filename");
}
/**
* Creates a {@link GridFsCriteria} for restrictions on the file's content type.
*
* @return
*/
public static GridFsCriteria whereContentType() {
return new GridFsCriteria("contentType");
}
}