| 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.core.executor.conditon; |
| 19 | |
| 20 | import org.wso2.siddhi.core.event.AtomicEvent; |
| 21 | import org.wso2.siddhi.core.exception.OperationNotSupportedException; |
| 22 | import org.wso2.siddhi.core.executor.expression.ExpressionExecutor; |
| 23 | import org.wso2.siddhi.query.api.definition.Attribute; |
| 24 | |
| 25 | public class BooleanConditionExecutor implements ConditionExecutor { |
| 26 | |
| 27 | public ExpressionExecutor expressionExecutor; |
| 28 | |
| 29 | public BooleanConditionExecutor(ExpressionExecutor expressionExecutor) { |
| 30 | if (expressionExecutor.getType() != Attribute.Type.BOOL) { |
| 31 | throw new OperationNotSupportedException("Boolean condition cannot handle non boolean values"); |
| 32 | } |
| 33 | this.expressionExecutor = expressionExecutor; |
| 34 | } |
| 35 | |
| 36 | public boolean execute(AtomicEvent event) { |
| 37 | Object value = expressionExecutor.execute(event); |
| 38 | return !(value == null) && (Boolean) value; |
| 39 | } |
| 40 | } |