java/org/apache/el/parser/ParseException.java

/* Generated By:JavaCC: Do not edit this line. ParseException.java Version 7.0 */
/* JavaCCOptions:KEEP_LINE_COLUMN=true */
package org.apache.el.parser;

/**
 * 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.
 */
@SuppressWarnings("all") // Ignore warnings in generated code
public class ParseException extends Exception {

    /**
     * The version identifier for this Serializable class. Increment only if the <i>serialized</i> form of the class
     * changes.
     */
    private static final long serialVersionUID = 1L;

    /**
     * The end of line string for this machine.
     */
    protected static String EOL = System.getProperty("line.separator", "\n");


    /**
     * 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.
     */
    public ParseException(Token currentTokenVal, int[][] expectedTokenSequencesVal, String[] tokenImageVal) {
        super(initialise(currentTokenVal, expectedTokenSequencesVal, tokenImageVal));
        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();
    }


    /** Constructor with message. */
    public ParseException(String message) {
        super(message);
    }


    /**
     * This is the last token that has been consumed successfully. If this object has been created due to a parse error,
     * the token following 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;


    /**
     * 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) the
     * correct error message gets displayed.
     */
    private static String initialise(Token currentToken, int[][] expectedTokenSequences, String[] tokenImage) {

        StringBuilder expected = new StringBuilder();
        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.append(tokenImage[expectedTokenSequences[i][j]]).append(' ');
            }
            if (expectedTokenSequences[i][expectedTokenSequences[i].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 += " " + tokenImage[tok.kind];
            retval += " \"";
            retval += add_escapes(tok.image);
            retval += " \"";
            tok = tok.next;
        }
        if (currentToken.next != null) {
            retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
        }
        retval += "." + EOL;

        if (expectedTokenSequences.length == 0) {
            // Nothing to add here
        } else {
            if (expectedTokenSequences.length == 1) {
                retval += "Was expecting:" + EOL + "    ";
            } else {
                retval += "Was expecting one of:" + EOL + "    ";
            }
            retval += expected.toString();
        }

        return retval;
    }


    /**
     * Used to convert raw characters to their escaped version when these raw version cannot be used as part of an ASCII
     * string literal.
     */
    static String add_escapes(String str) {
        StringBuilder retval = new StringBuilder();
        char ch;
        for (int i = 0; i < str.length(); i++) {
            switch (str.charAt(i)) {
                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));
                    } else {
                        retval.append(ch);
                    }
                    continue;
            }
        }
        return retval.toString();
    }
}
/* JavaCC - OriginalChecksum=7b4787d8879bd4e4e79738c1d4a275eb (do not edit this line) */