/*
* Copyright (c) 2016, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. licenses this file to you 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.wso2.siddhi.core.util.collection.expression;
import org.wso2.siddhi.query.api.expression.Expression;
/**
* Interface for expressions related to collection of events. These will be used by in-memory table implementation.
*/
public interface CollectionExpression {
Expression getExpression();
CollectionScope getCollectionScope();
/**
* Enums to hold collection expression scopes.
*/
enum CollectionScope {
NON,
INDEXED_ATTRIBUTE,
INDEXED_RESULT_SET,
OPTIMISED_RESULT_SET,
EXHAUSTIVE
}
}