/*
* Copyright 2013 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.core.aggregation;
/**
* Abstraction for a field.
*
* @author Oliver Gierke
* @since 1.3
*/
public interface Field {
/**
* Returns the name of the field.
*
* @return must not be {@literal null}.
*/
String getName();
/**
* Returns the target of the field. In case no explicit target is available {@link #getName()} should be returned.
*
* @return must not be {@literal null}.
*/
String getTarget();
/**
* Returns whether the Field is aliased, which means it has a name set different from the target.
*
* @return
*/
boolean isAliased();
}