| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * 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 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; |
| |
| import org.apache.avalon.framework.CascadingException; |
| import org.apache.cocoon.components.language.programming.CompilerError; |
| |
| import java.io.PrintStream; |
| import java.io.PrintWriter; |
| import java.io.File; |
| import java.io.FileReader; |
| |
| /** |
| * The language exception. |
| * |
| * @author <a href="mailto:ricardo@apache.org">Ricardo Rocha</a> |
| * @author <a href="mailto:tcurdt@apache.org">Torsten Curdt</a> |
| * @version CVS $Id: LanguageException.java,v 1.2 2004/03/05 13:02:47 bdelacretaz Exp $ |
| */ |
| public class LanguageException extends CascadingException { |
| |
| private CompilerError[] errors = null; |
| private String filename = null; |
| |
| public LanguageException(String message, String filename, CompilerError[] errors) { |
| super(message); |
| this.filename = filename; |
| this.errors = errors; |
| } |
| |
| public LanguageException(String message) { |
| super(message); |
| } |
| |
| public LanguageException(String message, Throwable t) { |
| super(message, t); |
| } |
| |
| public String getMessage() { |
| if (errors != null) { |
| StringBuffer extendedMessage = new StringBuffer(); |
| extendedMessage.append(super.getMessage()); |
| |
| if (errors != null && filename != null) { |
| extendedMessage.append(getSource(filename)); |
| } |
| |
| for (int i = 0; i < errors.length; i++) { |
| CompilerError error = errors[i]; |
| if (i > 0) extendedMessage.append("\n"); |
| extendedMessage.append("Line "); |
| extendedMessage.append(error.getStartLine()); |
| extendedMessage.append(", column "); |
| extendedMessage.append(error.getStartColumn()); |
| extendedMessage.append(": "); |
| extendedMessage.append(error.getMessage()); |
| } |
| return (extendedMessage.toString()); |
| } |
| else { |
| return(super.getMessage()); |
| } |
| } |
| |
| // Stolen from ProcessingException... |
| |
| public String toString() { |
| StringBuffer s = new StringBuffer(); |
| s.append(super.toString()); |
| if(getCause()!=null) { |
| s.append(": "); |
| s.append(getCause().toString()); |
| } |
| return s.toString(); |
| } |
| |
| public void printStackTrace() { |
| super.printStackTrace(); |
| if(getCause()!=null) |
| getCause().printStackTrace(); |
| } |
| |
| public void printStackTrace( PrintStream s ) { |
| super.printStackTrace(s); |
| if(getCause()!=null) |
| getCause().printStackTrace(s); |
| } |
| |
| public void printStackTrace( PrintWriter s ) { |
| super.printStackTrace(s); |
| if(getCause()!=null) |
| getCause().printStackTrace(s); |
| } |
| |
| private final static int linesBefore = 3; |
| private final static int linesAfter = 3; |
| |
| |
| private final static String getString( char[] buffer, int start, int end) { |
| int currentLine = 1; |
| int currentPos = 0; |
| |
| while(currentLine < start && currentPos < buffer.length) { |
| if (buffer[currentPos++] == '\n') { |
| currentLine++; |
| } |
| } |
| int startPos = currentPos; |
| |
| while(currentLine < (end+1) && currentPos < buffer.length) { |
| if (buffer[currentPos++] == '\n') { |
| currentLine++; |
| } |
| } |
| int endPos = currentPos; |
| |
| return( new String( buffer, startPos, endPos-startPos )); |
| } |
| |
| private String getSource( String filename ) { |
| File file = new File(filename); |
| long fileSize = file.length(); |
| if (file != null && file.exists() && file.isFile() && fileSize > 0) { |
| // paranoid checking: nothing larger than ints can handle or 10MB |
| if (fileSize < Integer.MAX_VALUE || fileSize < 10 * 1024 * 1024) { |
| char[] buffer = new char[(int) fileSize]; |
| try { |
| FileReader fileReader = new FileReader(file); |
| fileReader.read(buffer, 0, (int) fileSize); |
| |
| StringBuffer listing = new StringBuffer(); |
| |
| for (int i = 0; i < errors.length; i++) { |
| CompilerError error = errors[i]; |
| |
| int start = error.getStartLine(); |
| int end = error.getEndLine(); |
| |
| if (start > 0 && end > 0) { |
| String before = getString(buffer, start - 1 - linesBefore, start - 1); |
| String itself = getString(buffer, start, end); |
| String after = getString(buffer, end + 1, end + 1 + linesAfter); |
| |
| listing.append("ERROR ").append(i + 1).append(" (").append(error.getFile()).append("):\n"); |
| listing.append("...\n"); |
| listing.append(before); |
| listing.append("\n// start error (lines ").append(error.getStartLine()).append("-").append(error.getEndLine()).append(") \"").append(error.getMessage()).append("\"\n"); |
| listing.append(itself); |
| listing.append("\n// end error\n"); |
| listing.append(after); |
| listing.append("\n...\n"); |
| } |
| } |
| |
| fileReader.close(); |
| |
| return (listing.toString()); |
| } |
| catch (Exception e) { |
| } |
| } |
| } |
| return (null); |
| } |
| |
| /* |
| public static void main(String[] args) { |
| String s = |
| "1 \n"+ |
| "2 System.out.println(\n"+ |
| "3 \n"+ |
| "4 this.contentHandler.startDocument();\n"+ |
| "5 AttributesImpl xspAttr = new AttributesImpl();\n"+ |
| "6 \n"; |
| |
| char[] buffer = s.toCharArray(); |
| |
| int start = 2; |
| int end = 2; |
| |
| String before = getString(buffer, start - 1 - linesBefore, start - 1); |
| String itself = getString(buffer, start, end); |
| String after = getString(buffer, end + 1, end + 1 + linesAfter); |
| |
| |
| System.out.print(before); |
| System.out.println("--"); |
| System.out.print(itself); |
| System.out.println("--"); |
| System.out.print(after); |
| } |
| */ |
| } |