nl.tue.buildingsmart.express.population.ParseException Maven / Gradle / Ivy
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Java implementation for the BuildingSMART standards IFC2x3TC1 and IFC4
package nl.tue.buildingsmart.express.population;
/******************************************************************************
* Copyright (C) 2009-2016 BIMserver.org
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see {@literal}
*/
public ParseException(Token currentTokenVal, int[][] expectedTokenSequencesVal, String[] tokenImageVal) {
super("");
specialConstructor = true;
currentToken = currentTokenVal;
expectedTokenSequences = expectedTokenSequencesVal;
tokenImage = tokenImageVal;
}
/**
* The following constructors are for use by you for whatever purpose you
* can think of. Constructing the exception in this manner makes the
* exception behave in the normal way - i.e., as documented in the class
* "Throwable". The fields "errorToken", "expectedTokenSequences", and
* "tokenImage" do not contain relevant information. The JavaCC generated
* code does not use these constructors.
*/
public ParseException() {
super();
specialConstructor = false;
}
public ParseException(String message) {
super(message);
specialConstructor = false;
}
/**
* This variable determines which constructor was used to create this object
* and thereby affects the semantics of the "getMessage" method (see below).
*/
protected boolean specialConstructor;
/**
* This is the last token that has been consumed successfully. If this
* object has been created due to a parse error, the token followng this
* token will (therefore) be the first error token.
*/
public Token currentToken;
/**
* Each entry in this array is an array of integers. Each array of integers
* represents a sequence of tokens (by their ordinal values) that is
* expected at this point of the parse.
*/
public int[][] expectedTokenSequences;
/**
* This is a reference to the "tokenImage" array of the generated parser
* within which the parse error occurred. This array is defined in the
* generated ...Constants interface.
*/
public String[] tokenImage;
/**
* This method has the standard behavior when this object has been created
* using the standard constructors. Otherwise, it uses "currentToken" and
* "expectedTokenSequences" to generate a parse error message and returns
* it. If this object has been created due to a parse error, and you do not
* catch it (it gets thrown from the parser), then this method is called
* during the printing of the final stack trace, and hence the correct error
* message gets displayed.
*/
public String getMessage() {
if (!specialConstructor) {
return super.getMessage();
}
String expected = "";
int maxSize = 0;
for (int i = 0; i < expectedTokenSequences.length; i++) {
if (maxSize < expectedTokenSequences[i].length) {
maxSize = expectedTokenSequences[i].length;
}
for (int j = 0; j < expectedTokenSequences[i].length; j++) {
expected += tokenImage[expectedTokenSequences[i][j]] + " ";
}
if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
expected += "...";
}
expected += eol + " ";
}
String retval = "Encountered \"";
Token tok = currentToken.next;
for (int i = 0; i < maxSize; i++) {
if (i != 0)
retval += " ";
if (tok.kind == 0) {
retval += tokenImage[0];
break;
}
retval += add_escapes(tok.image);
tok = tok.next;
}
retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
retval += "." + eol;
if (expectedTokenSequences.length == 1) {
retval += "Was expecting:" + eol + " ";
} else {
retval += "Was expecting one of:" + eol + " ";
}
retval += expected;
return retval;
}
/**
* The end of line string for this machine.
*/
protected String eol = System.getProperty("line.separator", "\n");
/**
* Used to convert raw characters to their escaped version when these raw
* version cannot be used as part of an ASCII string literal.
*/
protected String add_escapes(String str) {
StringBuffer retval = new StringBuffer();
char ch;
for (int i = 0; i < str.length(); i++) {
switch (str.charAt(i)) {
case 0:
continue;
case '\b':
retval.append("\\b");
continue;
case '\t':
retval.append("\\t");
continue;
case '\n':
retval.append("\\n");
continue;
case '\f':
retval.append("\\f");
continue;
case '\r':
retval.append("\\r");
continue;
case '\"':
retval.append("\\\"");
continue;
case '\'':
retval.append("\\\'");
continue;
case '\\':
retval.append("\\\\");
continue;
default:
if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
String s = "0000" + Integer.toString(ch, 16);
retval.append("\\u" + s.substring(s.length() - 4, s.length()));
} else {
retval.append(ch);
}
continue;
}
}
return retval.toString();
}
}