| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| package org.apache.skywalking.oal.tool.parser; |
| |
| import java.io.IOException; |
| import java.util.LinkedList; |
| import java.util.List; |
| import org.antlr.v4.runtime.CharStreams; |
| import org.antlr.v4.runtime.CommonTokenStream; |
| import org.antlr.v4.runtime.tree.ParseTree; |
| import org.antlr.v4.runtime.tree.ParseTreeWalker; |
| import org.apache.skywalking.oal.tool.grammar.OALLexer; |
| import org.apache.skywalking.oal.tool.grammar.OALParser; |
| |
| public class ScriptParser { |
| private OALLexer lexer; |
| |
| private ScriptParser() { |
| |
| } |
| |
| public static ScriptParser createFromFile(String scriptFilepath) throws IOException { |
| ScriptParser parser = new ScriptParser(); |
| parser.lexer = new OALLexer(CharStreams.fromFileName(scriptFilepath)); |
| return parser; |
| } |
| |
| public static ScriptParser createFromScriptText(String script) throws IOException { |
| ScriptParser parser = new ScriptParser(); |
| parser.lexer = new OALLexer(CharStreams.fromString(script)); |
| return parser; |
| } |
| |
| public List<AnalysisResult> parse() throws IOException { |
| List<AnalysisResult> results = new LinkedList<>(); |
| CommonTokenStream tokens = new CommonTokenStream(lexer); |
| |
| OALParser parser = new OALParser(tokens); |
| |
| ParseTree tree = parser.root(); |
| ParseTreeWalker walker = new ParseTreeWalker(); |
| |
| walker.walk(new OALListener(results), tree); |
| |
| return results; |
| } |
| |
| public void close() { |
| } |
| } |