/*******************************************************************************
 * 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 literal expression node in the expression tree returned by the methods:
 * <li>{@link com.sap.core.odata.api.uri.UriParser#parseFilterString(com.sap.core.odata.api.edm.EdmEntityType, String) }</li>
 * <li>{@link com.sap.core.odata.api.uri.UriParser#parseOrderByString(com.sap.core.odata.api.edm.EdmEntityType, String) }</li> 
 * <br>
 * <br>
 * <p>A literal expression node is inserted in the expression tree for any token witch is no
 * valid <i>operator</i>, <i>method</i> or <i>property</i>.
 * <br>
 * <br>
 * <p><b>For example</b> the filter "$filter=age eq 12" will result in an expression tree
 * with a literal expression node for "12".
 * <br>
 * <br>
 * @author SAP AG
 */
public interface LiteralExpression extends CommonExpression {

}