| 1 | /** |
| 2 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 3 | * you may not use this file except in compliance with the License. |
| 4 | * You may obtain a copy of the License at |
| 5 | * |
| 6 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 7 | * |
| 8 | * Unless required by applicable law or agreed to in writing, |
| 9 | * software distributed under the License is distributed on an |
| 10 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 11 | * KIND, either express or implied. See the License for the |
| 12 | * specific language governing permissions and limitations |
| 13 | * under the License. |
| 14 | */ |
| 15 | |
| 16 | package org.wso2.siddhi.query.compiler; |
| 17 | |
| 18 | import org.antlr.runtime.ANTLRStringStream; |
| 19 | import org.antlr.runtime.CommonTokenStream; |
| 20 | import org.antlr.runtime.tree.CommonTree; |
| 21 | import org.antlr.runtime.tree.CommonTreeNodeStream; |
| 22 | import org.wso2.siddhi.query.api.ExecutionPlan; |
| 23 | import org.wso2.siddhi.query.api.definition.StreamDefinition; |
| 24 | import org.wso2.siddhi.query.api.query.Query; |
| 25 | import org.wso2.siddhi.query.compiler.exception.SiddhiPraserException; |
| 26 | |
| 27 | import java.util.List; |
| 28 | |
| 29 | public class SiddhiCompiler { |
| 30 | |
| 31 | // private static SiddhiCompiler compiler = null; |
| 32 | // |
| 33 | // private SiddhiCompiler() { |
| 34 | // } |
| 35 | // |
| 36 | // /** |
| 37 | // * get the SiddhiCompiler instance |
| 38 | // * |
| 39 | // * @return the instance of query factory |
| 40 | // */ |
| 41 | // public static SiddhiCompiler getInstance() { |
| 42 | // if (null == compiler) { |
| 43 | // compiler = new SiddhiCompiler(); |
| 44 | // } |
| 45 | // return compiler; |
| 46 | // } |
| 47 | |
| 48 | public static List<ExecutionPlan> parse(String source) throws SiddhiPraserException { |
| 49 | try { |
| 50 | SiddhiQLGrammarLexer lexer = new SiddhiQLGrammarLexer(); |
| 51 | lexer.setCharStream(new ANTLRStringStream(source)); |
| 52 | CommonTokenStream tokens = new CommonTokenStream(lexer); |
| 53 | SiddhiQLGrammarParser parser = new SiddhiQLGrammarParser(tokens); |
| 54 | |
| 55 | SiddhiQLGrammarParser.executionPlan_return r = parser.executionPlan(); |
| 56 | CommonTree t = (CommonTree) r.getTree(); |
| 57 | |
| 58 | CommonTreeNodeStream nodes = new CommonTreeNodeStream(t); |
| 59 | nodes.setTokenStream(tokens); |
| 60 | SiddhiQLGrammarWalker walker = new SiddhiQLGrammarWalker(nodes); |
| 61 | return walker.executionPlan(); |
| 62 | |
| 63 | } catch (Throwable e) { |
| 64 | throw new SiddhiPraserException(e.getMessage(), e); |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | public static StreamDefinition parseStreamDefinition(String source) throws SiddhiPraserException { |
| 69 | try { |
| 70 | SiddhiQLGrammarLexer lexer = new SiddhiQLGrammarLexer(); |
| 71 | lexer.setCharStream(new ANTLRStringStream(source)); |
| 72 | CommonTokenStream tokens = new CommonTokenStream(lexer); |
| 73 | SiddhiQLGrammarParser parser = new SiddhiQLGrammarParser(tokens); |
| 74 | |
| 75 | SiddhiQLGrammarParser.definitionStream_return r = parser.definitionStream(); |
| 76 | CommonTree t = (CommonTree) r.getTree(); |
| 77 | |
| 78 | CommonTreeNodeStream nodes = new CommonTreeNodeStream(t); |
| 79 | nodes.setTokenStream(tokens); |
| 80 | SiddhiQLGrammarWalker walker = new SiddhiQLGrammarWalker(nodes); |
| 81 | return walker.definitionStream(); |
| 82 | |
| 83 | } catch (Throwable e) { |
| 84 | throw new SiddhiPraserException(e.getMessage(), e); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | public static Query parseQuery(String source) throws SiddhiPraserException { |
| 89 | try { |
| 90 | SiddhiQLGrammarLexer lexer = new SiddhiQLGrammarLexer(); |
| 91 | lexer.setCharStream(new ANTLRStringStream(source)); |
| 92 | CommonTokenStream tokens = new CommonTokenStream(lexer); |
| 93 | SiddhiQLGrammarParser parser = new SiddhiQLGrammarParser(tokens); |
| 94 | |
| 95 | SiddhiQLGrammarParser.query_return r = parser.query(); |
| 96 | CommonTree t = (CommonTree) r.getTree(); |
| 97 | |
| 98 | CommonTreeNodeStream nodes = new CommonTreeNodeStream(t); |
| 99 | nodes.setTokenStream(tokens); |
| 100 | SiddhiQLGrammarWalker walker = new SiddhiQLGrammarWalker(nodes); |
| 101 | return walker.query(); |
| 102 | |
| 103 | } catch (Throwable e) { |
| 104 | throw new SiddhiPraserException(e.getMessage(), e); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | |
| 109 | } |