| 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.stream.sequence; |
| 19 | |
| 20 | import org.wso2.siddhi.query.api.query.QueryEventStream; |
| 21 | import org.wso2.siddhi.query.api.stream.SingleStream; |
| 22 | import org.wso2.siddhi.query.api.stream.Stream; |
| 23 | import org.wso2.siddhi.query.api.definition.StreamDefinition; |
| 24 | import org.wso2.siddhi.query.api.stream.sequence.element.RegexElement; |
| 25 | import org.wso2.siddhi.query.api.stream.sequence.element.NextElement; |
| 26 | import org.wso2.siddhi.query.api.stream.sequence.element.OrElement; |
| 27 | import org.wso2.siddhi.query.api.stream.sequence.element.SequenceElement; |
| 28 | |
| 29 | import java.util.ArrayList; |
| 30 | import java.util.HashSet; |
| 31 | import java.util.List; |
| 32 | import java.util.Map; |
| 33 | |
| 34 | public class SequenceStream implements Stream, SequenceElement { |
| 35 | private SequenceElement sequenceElement; |
| 36 | private List<String> streamIdList; |
| 37 | |
| 38 | public SequenceStream(SequenceElement sequenceElement) { |
| 39 | this.sequenceElement = sequenceElement; |
| 40 | this.streamIdList = new ArrayList<String>(collectStreamIds(sequenceElement, new HashSet<String>())); |
| 41 | } |
| 42 | |
| 43 | public SequenceElement getSequenceElement() { |
| 44 | return sequenceElement; |
| 45 | } |
| 46 | |
| 47 | @Override |
| 48 | public List<String> getStreamIds() { |
| 49 | return streamIdList; |
| 50 | } |
| 51 | |
| 52 | @Override |
| 53 | public List<QueryEventStream> constructQueryEventStreamList( |
| 54 | Map<String, StreamDefinition> streamDefinitionMap, |
| 55 | List<QueryEventStream> queryEventStreams) { |
| 56 | return constructEventStreamList(getSequenceElement(), streamDefinitionMap, queryEventStreams); |
| 57 | } |
| 58 | private HashSet<String> collectStreamIds(SequenceElement sequenceElement, |
| 59 | HashSet<String> streamIds) { |
| 60 | if (sequenceElement instanceof SequenceStream) { |
| 61 | streamIds.addAll(((SequenceStream) sequenceElement).getStreamIds()); |
| 62 | } else if (sequenceElement instanceof SingleStream) { |
| 63 | streamIds.addAll(((SingleStream) sequenceElement).getStreamIds()); |
| 64 | } else if (sequenceElement instanceof OrElement) { |
| 65 | collectStreamIds(((OrElement) sequenceElement).getSingleStream1(), streamIds); |
| 66 | collectStreamIds(((OrElement) sequenceElement).getSingleStream2(), streamIds); |
| 67 | } else if (sequenceElement instanceof RegexElement) { |
| 68 | collectStreamIds(((RegexElement) sequenceElement).getSingleStream(), streamIds); |
| 69 | } else if (sequenceElement instanceof NextElement) { |
| 70 | collectStreamIds(((NextElement) sequenceElement).getSequenceElement(), streamIds); |
| 71 | collectStreamIds(((NextElement) sequenceElement).getNextSequenceElement(), streamIds); |
| 72 | } |
| 73 | return streamIds; |
| 74 | } |
| 75 | |
| 76 | public List<QueryEventStream> constructEventStreamList(SequenceElement sequenceElement, |
| 77 | Map<String, StreamDefinition> streamDefinitionMap, |
| 78 | List<QueryEventStream> queryEventStreams) { |
| 79 | |
| 80 | |
| 81 | if (sequenceElement instanceof SingleStream) { |
| 82 | ((SingleStream) sequenceElement).constructQueryEventStreamList(streamDefinitionMap, queryEventStreams); |
| 83 | } else if (sequenceElement instanceof OrElement) { |
| 84 | constructEventStreamList(((OrElement) sequenceElement).getSingleStream1(), streamDefinitionMap, queryEventStreams); |
| 85 | constructEventStreamList(((OrElement) sequenceElement).getSingleStream2(), streamDefinitionMap, queryEventStreams); |
| 86 | } else if (sequenceElement instanceof RegexElement) { |
| 87 | constructEventStreamList(((RegexElement) sequenceElement).getSingleStream(), streamDefinitionMap, queryEventStreams); |
| 88 | } else if (sequenceElement instanceof NextElement) { |
| 89 | constructEventStreamList(((NextElement) sequenceElement).getSequenceElement(), streamDefinitionMap, queryEventStreams); |
| 90 | constructEventStreamList(((NextElement) sequenceElement).getNextSequenceElement(), streamDefinitionMap, queryEventStreams); |
| 91 | } else if (sequenceElement instanceof SequenceStream) { |
| 92 | ((SequenceStream) sequenceElement).constructQueryEventStreamList(streamDefinitionMap, queryEventStreams); |
| 93 | } |
| 94 | |
| 95 | return queryEventStreams; |
| 96 | } |
| 97 | } |