/*******************************************************************************
* Copyright 2013 SAP AG
*
* 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 com.sap.core.odata.api.uri.expression;
/**
* Represents a $filter expression in the expression tree returned by {@link com.sap.core.odata.api.uri.UriParser#parseFilterString(com.sap.core.odata.api.edm.EdmEntityType, String)}
* Used to define the <b>root</b> expression node in an $filter expression tree.
*
* @author SAP AG
*/
public interface FilterExpression extends CommonExpression {
/**
* @return Returns the $filter expression string used to build the expression tree
*/
String getExpressionString();
/**
* @return Returns the expression node representing the first <i>operator</i>,<i>method</i>,<i>literal</i> or <i>property</i> of the expression tree
*/
CommonExpression getExpression();
}