| /* |
| * Copyright 2009-2012 by The Regents of the University of California |
| * Licensed 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 from |
| * |
| * 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 edu.uci.ics.asterix.lexergenerator; |
| |
| import edu.uci.ics.asterix.lexergenerator.LexerGenerator; |
| import java.io.BufferedReader; |
| import java.io.FileNotFoundException; |
| import java.io.FileReader; |
| import java.io.IOException; |
| import java.util.HashMap; |
| import org.apache.maven.plugin.AbstractMojo; |
| import org.apache.maven.plugin.MojoExecutionException; |
| |
| import java.io.File; |
| |
| /** |
| * @goal generate-lexer |
| * @phase generate-sources |
| * @requiresDependencyResolution compile |
| */ |
| public class LexerGeneratorMojo extends AbstractMojo { |
| /** |
| * parameter injected from pom.xml |
| * |
| * @parameter |
| * @required |
| */ |
| private File grammarFile; |
| |
| /** |
| * parameter injected from pom.xml |
| * |
| * @parameter |
| * @required |
| */ |
| private File outputDir; |
| |
| public void execute() throws MojoExecutionException { |
| LexerGenerator lexer = new LexerGenerator(getLog()); |
| HashMap<String, String> config = new HashMap<String, String>(); |
| getLog().info("--- Lexer Generator Maven Plugin - started with grammarFile: " + grammarFile.toString()); |
| try { |
| String input = readFile(grammarFile); |
| config.put("OUTPUT_DIR", outputDir.toString()); |
| boolean tokens = false; |
| for (String line : input.split("\r?\n")) { |
| line = line.trim(); |
| if (line.length() == 0 || line.charAt(0) == '#') |
| continue; |
| if (tokens == false && !line.equals("TOKENS:")) { |
| config.put(line.split("\\s*:\\s*")[0], line.split("\\s*:\\s*")[1]); |
| } else if (line.equals("TOKENS:")) { |
| tokens = true; |
| } else { |
| lexer.addToken(line); |
| } |
| } |
| lexer.generateLexer(config); |
| } catch (Throwable e) { |
| throw new MojoExecutionException("Error while generating lexer", e); |
| } |
| String parsedGrammar = lexer.printParsedGrammar(); |
| getLog().info("--- Generated grammar:\n" + parsedGrammar); |
| } |
| |
| private String readFile(File file) throws FileNotFoundException, IOException { |
| StringBuffer fileData = new StringBuffer(1000); |
| BufferedReader reader = new BufferedReader(new FileReader(file)); |
| char[] buf = new char[1024]; |
| int numRead = 0; |
| while ((numRead = reader.read(buf)) != -1) { |
| String readData = String.valueOf(buf, 0, numRead); |
| fileData.append(readData); |
| buf = new char[1024]; |
| } |
| reader.close(); |
| return fileData.toString(); |
| } |
| |
| } |