| 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.expression; |
| 19 | |
| 20 | |
| 21 | import org.wso2.siddhi.query.api.expression.constant.BoolConstant; |
| 22 | import org.wso2.siddhi.query.api.expression.constant.DoubleConstant; |
| 23 | import org.wso2.siddhi.query.api.expression.constant.FloatConstant; |
| 24 | import org.wso2.siddhi.query.api.expression.constant.IntConstant; |
| 25 | import org.wso2.siddhi.query.api.expression.constant.LongConstant; |
| 26 | import org.wso2.siddhi.query.api.expression.constant.StringConstant; |
| 27 | |
| 28 | public abstract class Expression { |
| 29 | public static StringConstant value(String value) { |
| 30 | return new StringConstant(value); |
| 31 | } |
| 32 | |
| 33 | public static IntConstant value(int value) { |
| 34 | return new IntConstant(value); |
| 35 | } |
| 36 | |
| 37 | public static LongConstant value(long value) { |
| 38 | return new LongConstant(value); |
| 39 | } |
| 40 | |
| 41 | public static DoubleConstant value(double value) { |
| 42 | return new DoubleConstant(value); |
| 43 | } |
| 44 | |
| 45 | public static FloatConstant value(float value) { |
| 46 | return new FloatConstant(value); |
| 47 | } |
| 48 | |
| 49 | public static BoolConstant value(boolean value) { |
| 50 | return new BoolConstant(value); |
| 51 | } |
| 52 | |
| 53 | public static Variable variable(String streamId, String attributeName) { |
| 54 | return new Variable(streamId, attributeName); |
| 55 | } |
| 56 | |
| 57 | public static Add add(Expression leftValue, Expression rightValue) { |
| 58 | return new Add(leftValue, rightValue); |
| 59 | } |
| 60 | |
| 61 | public static Minus minus(Expression leftValue, Expression rightValue) { |
| 62 | return new Minus(leftValue, rightValue); |
| 63 | } |
| 64 | |
| 65 | public static Multiply multiply(Expression leftValue, Expression rightValue) { |
| 66 | return new Multiply(leftValue, rightValue); |
| 67 | } |
| 68 | |
| 69 | public static Divide divide(Expression leftValue, Expression rightValue) { |
| 70 | return new Divide(leftValue, rightValue); |
| 71 | } |
| 72 | |
| 73 | public static Mod mod(Expression leftValue, Expression rightValue) { |
| 74 | return new Mod(leftValue, rightValue); |
| 75 | } |
| 76 | |
| 77 | public static Variable variable(String attributeName) { |
| 78 | return new Variable(null, attributeName); |
| 79 | } |
| 80 | |
| 81 | // public abstract Attribute.Type getType(); |
| 82 | |
| 83 | // public abstract void inferType(Map<String, StreamDefinition> streamDefinitionMap); |
| 84 | |
| 85 | public static Variable variable(String streamId,int position, String attributeName) { |
| 86 | return new Variable(streamId,position, attributeName); |
| 87 | } |
| 88 | } |