| /* |
| * 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.cocoon.components.language.programming.java; |
| |
| import java.io.BufferedReader; |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.NoSuchElementException; |
| import java.util.StringTokenizer; |
| |
| import org.apache.cocoon.components.language.programming.CompilerError; |
| |
| import javax.tools.JavaCompiler; |
| import javax.tools.ToolProvider; |
| |
| /** |
| * This class wraps the Sun's Javac Compiler. |
| * |
| * @author <a href="mailto:stefano@apache.org">Stefano Mazzocchi</a> |
| * @version CVS $Id: Javac.java 1853801 2019-02-18 14:03:25Z anathaniel $ |
| * @since 2.0 |
| */ |
| |
| public class Javac extends AbstractJavaCompiler { |
| |
| public Javac() { |
| // EMPTY |
| } |
| |
| /** |
| * Compile a source file yielding a loadable class file. |
| * |
| * <code>null</code> if it is the platform's default encoding |
| * @exception IOException If an error occurs during compilation |
| */ |
| public boolean compile() throws IOException { |
| |
| ByteArrayOutputStream err = new ByteArrayOutputStream(); |
| String[] args = toStringArray(fillArguments(new ArrayList<String>())); |
| |
| JavaCompiler javac = ToolProvider.getSystemJavaCompiler(); |
| int rc = javac.run(null, null, err, args); |
| boolean result = rc == 0; |
| this.errors = new ByteArrayInputStream(err.toByteArray()); |
| return result; |
| } |
| |
| /** |
| * Parse the compiler error stream to produce a list of |
| * <code>CompilerError</code>s |
| * |
| * @param input The error stream |
| * @return The list of compiler error messages |
| * @exception IOException If an error occurs during message collection |
| */ |
| protected List<CompilerError> parseStream(BufferedReader input) throws IOException { |
| List<CompilerError> errors = new ArrayList<CompilerError>(); |
| |
| while (true) { |
| StringBuilder buffer = new StringBuilder(); |
| |
| // most errors terminate with the '^' char |
| String line; |
| do { |
| if ((line = input.readLine()) == null) { |
| if (buffer.length() > 0) { |
| // There's an error which doesn't end with a '^' |
| errors.add(new CompilerError("\n" + buffer.toString())); |
| } |
| return errors; |
| } |
| buffer.append(line); |
| buffer.append('\n'); |
| } while (!line.endsWith("^")); |
| |
| // add the error bean |
| errors.add(parseModernError(buffer.toString())); |
| } |
| } |
| |
| /** |
| * Parse an individual compiler error message with modern style. |
| * |
| * @param error The error text |
| * @return A messaged <code>CompilerError</code> |
| */ |
| private CompilerError parseModernError(String error) { |
| StringTokenizer tokens = new StringTokenizer(error, ":"); |
| try { |
| String file = tokens.nextToken(); |
| if (file.length() == 1) |
| file = file + ":" + tokens.nextToken(); |
| int line = Integer.parseInt(tokens.nextToken()); |
| |
| String message = tokens.nextToken("\n").substring(1); |
| String context = tokens.nextToken("\n"); |
| String pointer = tokens.nextToken("\n"); |
| int startcolumn = pointer.indexOf("^"); |
| int endcolumn = context.indexOf(" ", startcolumn); |
| if (endcolumn == -1) { |
| endcolumn = context.length(); |
| } |
| return new CompilerError(file, false, line, startcolumn, line, endcolumn, message); |
| } catch(NoSuchElementException nse) { |
| return new CompilerError("no more tokens - could not parse error message: " + error); |
| } catch(Exception nse) { |
| return new CompilerError("could not parse error message: " + error); |
| } |
| } |
| |
| public String toString() { |
| return "Sun Javac Compiler"; |
| } |
| } |