org.apache.hadoop.hive.serde2.dynamic_type.ParseException Maven / Gradle / Ivy
/* Generated By:JavaCC: Do not edit this line. ParseException.java Version 3.0 */
package org.apache.hadoop.hive.serde2.dynamic_type;
/**
* This exception is thrown when parse errors are encountered. You can
* explicitly create objects of this exception type by calling the method
* generateParseException in the generated parser.
*
* You can modify this class to customize your error reporting mechanisms so
* long as you retain the public fields.
*/
public class ParseException extends Exception {
/**
* This constructor is used by the method "generateParseException" in the
* generated parser. Calling this constructor generates a new object of this
* type with the fields "currentToken", "expectedTokenSequences", and
* "tokenImage" set. The boolean flag "specialConstructor" is also set to true
* to indicate that this constructor was used to create this object. This
* constructor calls its super class with the empty string to force the
* "toString" method of parent class "Throwable" to print the error message in
* the form: ParseException:
*/
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.
*/
@Override
public String getMessage() {
if (!specialConstructor) {
return super.getMessage();
}
StringBuilder expected = new StringBuilder();
int maxSize = 0;
for (int[] expectedTokenSequence : expectedTokenSequences) {
if (maxSize < expectedTokenSequence.length) {
maxSize = expectedTokenSequence.length;
}
for (int element : expectedTokenSequence) {
expected.append(tokenImage[element]).append(" ");
}
if (expectedTokenSequence[expectedTokenSequence.length - 1] != 0) {
expected.append("...");
}
expected.append(eol).append(" ");
}
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.toString();
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) {
StringBuilder retval = new StringBuilder();
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();
}
}