| 1 | /* |
| 2 | * Copyright (c) 2005-2010, WSO2 Inc. (http://www.wso2.org) All Rights Reserved. |
| 3 | * |
| 4 | * WSO2 Inc. licenses this file to you under the Apache License, |
| 5 | * Version 2.0 (the "License"); you may not use this file except |
| 6 | * in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, |
| 12 | * software distributed under the License is distributed on an |
| 13 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 14 | * KIND, either express or implied. See the License for the |
| 15 | * specific language governing permissions and limitations |
| 16 | * under the License. |
| 17 | */ |
| 18 | package org.wso2.siddhi.query.api.condition; |
| 19 | |
| 20 | import org.wso2.siddhi.query.api.expression.Expression; |
| 21 | |
| 22 | public abstract class Condition { |
| 23 | |
| 24 | public static Condition compare(Expression leftExpression, Operator operator, |
| 25 | Expression rightExpression) { |
| 26 | return new Compare(leftExpression, operator, rightExpression); |
| 27 | } |
| 28 | |
| 29 | public static Condition and(Condition leftCondition, Condition rightCondition) { |
| 30 | return new AndCondition(leftCondition, rightCondition); |
| 31 | } |
| 32 | |
| 33 | public static Condition or(Condition leftCondition, Condition rightCondition) { |
| 34 | return new OrCondition(leftCondition, rightCondition); |
| 35 | } |
| 36 | |
| 37 | public static Condition not(Condition condition) { |
| 38 | return new NotCondition(condition); |
| 39 | } |
| 40 | |
| 41 | public static Condition bool(Expression expression) { |
| 42 | return new BooleanCondition(expression); |
| 43 | } |
| 44 | |
| 45 | public enum Operator { |
| 46 | LESS_THAN, GREATER_THAN, LESS_THAN_EQUAL, GREATER_THAN_EQUAL, EQUAL, NOT_EQUAL |
| 47 | } |
| 48 | } |