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16 package org.apache.cocoon.components.language;
17
18 import org.apache.avalon.framework.CascadingException;
19 import org.apache.cocoon.components.language.programming.CompilerError;
20
21 import java.io.PrintStream  ;
22 import java.io.PrintWriter ;
23 import java.io.File ;
24 import java.io.FileReader ;
25
26
33 public class LanguageException extends CascadingException {
34
35 private CompilerError[] errors = null;
36 private String filename = null;
37
38 public LanguageException(String message, String filename, CompilerError[] errors) {
39 super(message);
40 this.filename = filename;
41 this.errors = errors;
42 }
43
44 public LanguageException(String message) {
45 super(message);
46 }
47
48 public LanguageException(String message, Throwable t) {
49 super(message, t);
50 }
51
52 public String getMessage() {
53 if (errors != null) {
54 StringBuffer extendedMessage = new StringBuffer ();
55 extendedMessage.append(super.getMessage());
56
57 if (errors != null && filename != null) {
58 extendedMessage.append(getSource(filename));
59 }
60
61 for (int i = 0; i < errors.length; i++) {
62 CompilerError error = errors[i];
63 if (i > 0) extendedMessage.append("\n");
64 extendedMessage.append("Line ");
65 extendedMessage.append(error.getStartLine());
66 extendedMessage.append(", column ");
67 extendedMessage.append(error.getStartColumn());
68 extendedMessage.append(": ");
69 extendedMessage.append(error.getMessage());
70 }
71 return (extendedMessage.toString());
72 }
73 else {
74 return(super.getMessage());
75 }
76 }
77
78
80 public String toString() {
81 StringBuffer s = new StringBuffer ();
82 s.append(super.toString());
83 if(getCause()!=null) {
84 s.append(": ");
85 s.append(getCause().toString());
86 }
87 return s.toString();
88 }
89
90 public void printStackTrace() {
91 super.printStackTrace();
92 if(getCause()!=null)
93 getCause().printStackTrace();
94 }
95
96 public void printStackTrace( PrintStream s ) {
97 super.printStackTrace(s);
98 if(getCause()!=null)
99 getCause().printStackTrace(s);
100 }
101
102 public void printStackTrace( PrintWriter s ) {
103 super.printStackTrace(s);
104 if(getCause()!=null)
105 getCause().printStackTrace(s);
106 }
107
108 private final static int linesBefore = 3;
109 private final static int linesAfter = 3;
110
111
112 private final static String getString( char[] buffer, int start, int end) {
113 int currentLine = 1;
114 int currentPos = 0;
115
116 while(currentLine < start && currentPos < buffer.length) {
117 if (buffer[currentPos++] == '\n') {
118 currentLine++;
119 }
120 }
121 int startPos = currentPos;
122
123 while(currentLine < (end+1) && currentPos < buffer.length) {
124 if (buffer[currentPos++] == '\n') {
125 currentLine++;
126 }
127 }
128 int endPos = currentPos;
129
130 return( new String ( buffer, startPos, endPos-startPos ));
131 }
132
133 private String getSource( String filename ) {
134 File file = new File (filename);
135 long fileSize = file.length();
136 if (file != null && file.exists() && file.isFile() && fileSize > 0) {
137 if (fileSize < Integer.MAX_VALUE || fileSize < 10 * 1024 * 1024) {
139 char[] buffer = new char[(int) fileSize];
140 try {
141 FileReader fileReader = new FileReader (file);
142 fileReader.read(buffer, 0, (int) fileSize);
143
144 StringBuffer listing = new StringBuffer ();
145
146 for (int i = 0; i < errors.length; i++) {
147 CompilerError error = errors[i];
148
149 int start = error.getStartLine();
150 int end = error.getEndLine();
151
152 if (start > 0 && end > 0) {
153 String before = getString(buffer, start - 1 - linesBefore, start - 1);
154 String itself = getString(buffer, start, end);
155 String after = getString(buffer, end + 1, end + 1 + linesAfter);
156
157 listing.append("ERROR ").append(i + 1).append(" (").append(error.getFile()).append("):\n");
158 listing.append("...\n");
159 listing.append(before);
160 listing.append("\n// start error (lines ").append(error.getStartLine()).append("-").append(error.getEndLine()).append(") \"").append(error.getMessage()).append("\"\n");
161 listing.append(itself);
162 listing.append("\n// end error\n");
163 listing.append(after);
164 listing.append("\n...\n");
165 }
166 }
167
168 fileReader.close();
169
170 return (listing.toString());
171 }
172 catch (Exception e) {
173 }
174 }
175 }
176 return (null);
177 }
178
179
206 }
207 |
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