elementschemepointer.java

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                    0, fCurrentChildSequence.length);

            // Increase the size by a factor of 2 (?)
            fCurrentChildSequence = new int[fCurrentChildDepth * 2];
            System.arraycopy(tmpCurrentChildSequence, 0, fCurrentChildSequence,
                    0, tmpCurrentChildSequence.length);
        }

        //     
        if (fIsResolveElement) {
            // start
            if (event == XPointerPart.EVENT_ELEMENT_START) {
                fCurrentChildSequence[fCurrentChildDepth] = fCurrentChildPosition;
                fCurrentChildDepth++;

                // reset the current child position 
                fCurrentChildPosition = 1;

                //if (!fSchemeNameFound) {
                if ((fCurrentChildDepth <= fFoundDepth) || (fFoundDepth == 0)) {
                    if (checkMatch()) {
                        fIsElementFound = true;
                        fFoundDepth = fCurrentChildDepth;
                    } else {
                        fIsElementFound = false;
                        fFoundDepth = 0;
                    }
                }

            } else if (event == XPointerPart.EVENT_ELEMENT_END) {
                if (fCurrentChildDepth == fFoundDepth) {
                    fIsElementFound = true;
                } else if (((fCurrentChildDepth < fFoundDepth) && (fFoundDepth != 0))
                        || ((fCurrentChildDepth > fFoundDepth) // or empty element found
                        && (fFoundDepth == 0))) {
                    fIsElementFound = false;
                }

                // reset array position of last child
                fCurrentChildSequence[fCurrentChildDepth] = 0;

                fCurrentChildDepth--;
                fCurrentChildPosition = fCurrentChildSequence[fCurrentChildDepth] + 1;
                
            } else if (event == XPointerPart.EVENT_ELEMENT_EMPTY) {

                fCurrentChildSequence[fCurrentChildDepth] = fCurrentChildPosition;
                fCurrentChildPosition++;

                // Donot check for empty elements if the empty element is 
                // a child of a found parent element 
                //if (!fIsElementFound) {
                    if (checkMatch()) {
                        fIsElementFound = true;
                        fWasOnlyEmptyElementFound = true;
                    } else {
                        fIsElementFound = false;
                    }
                //} 
                
            }
        }

        return fIsElementFound;
    }

    /**
     * Matches the current position of the element being visited by checking 
     * its position and previous elements against the element XPointer expression.  
     * If a match is found it return true else false.
     *  
     * @return boolean 
     */
    protected boolean checkMatch() {
        // If the number of elements in the ChildSequence is greater than the
        // current child depth, there is not point in checking further
        if (!fIsShortHand) {
            // If a shorthand pointer is not present traverse the children
            // and compare
            if (fChildSequence.length <= fCurrentChildDepth + 1) {

                for (int i = 0; i < fChildSequence.length; i++) {
                    if (fChildSequence[i] != fCurrentChildSequence[i]) {
                        return false;
                    }
                }
            } else {
                return false;
            }
        } else {
            // If a shorthand pointer is present traverse the children
            // ignoring the first element of the CurrenChildSequence which
            // contains the ShortHand pointer element and compare            
            if (fChildSequence.length <= fCurrentChildDepth + 1) {

                for (int i = 0; i < fChildSequence.length; i++) {
                    // ensure fCurrentChildSequence is large enough
                    if (fCurrentChildSequence.length < i + 2) {
                        return false;
                    }

                    // ignore the first element of fCurrentChildSequence
                    if (fChildSequence[i] != fCurrentChildSequence[i + 1]) {
                        return false;
                    }
                }
            } else {
                return false;
            }

        }

        return true;
    }

    /**
     * Returns true if the node matches or is a child of a matching element()
     * scheme XPointer.
     *  
     * @see com.sun.org.apache.xerces.internal.xpointer.XPointerProcessor#isFragmentResolved()
     */
    public boolean isFragmentResolved() throws XNIException {
        // Return true if the Fragment was resolved and the current Node depth
        // is greater than or equal to the depth at which the element was found
        return fIsFragmentResolved ;
    }

    /**
     * Returns true if the XPointer expression resolves to a non-element child
     * of the current resource fragment.       
     * 
     * @see com.sun.org.apache.xerces.internal.xpointer.XPointerPart#isChildFragmentResolved()
     *   
     */    
    public boolean isChildFragmentResolved() {
    	// if only a shorthand pointer was present
    	if (fIsShortHand && fShortHandPointer != null && fChildSequence.length <= 0) {
    		return fShortHandPointer.isChildFragmentResolved();
    	} else {
    		return fWasOnlyEmptyElementFound ? !fWasOnlyEmptyElementFound
    				: (fIsFragmentResolved && (fCurrentChildDepth >= fFoundDepth));
    	}
    }
    
    /**
	 * Reports an XPointer error
	 */
    protected void reportError(String key, Object[] arguments)
            throws XNIException {
    	/*fErrorReporter.reportError(XPointerMessageFormatter.XPOINTER_DOMAIN,
    	 key, arguments, XMLErrorReporter.SEVERITY_ERROR);
    	 */        
    	throw new XNIException((fErrorReporter
    			.getMessageFormatter(XPointerMessageFormatter.XPOINTER_DOMAIN))
				.formatMessage(fErrorReporter.getLocale(), key, arguments));
    }

    /**
     * Initializes error handling objects
     */
    protected void initErrorReporter() {
        if (fErrorReporter == null) {
            fErrorReporter = new XMLErrorReporter();
        }
        if (fErrorHandler == null) {
            fErrorHandler = new XPointerErrorHandler();
        }
        fErrorReporter.putMessageFormatter(
                XPointerMessageFormatter.XPOINTER_DOMAIN,
                new XPointerMessageFormatter());
    }

    /**
     * Initializes the element scheme processor
     */
    protected void init() {
        fSchemeName = null;
        fSchemeData = null;
        fShortHandPointerName = null;
        fIsResolveElement = false;
        fIsElementFound = false;
        fWasOnlyEmptyElementFound = false;
        fFoundDepth = 0;
        fCurrentChildPosition = 1;
        fCurrentChildDepth = 0;
        fIsFragmentResolved = false;
        fShortHandPointer = null;
        
        initErrorReporter();
    }

    // ************************************************************************
    // element() Scheme expression scanner
    // ************************************************************************

    /**
     * List of XPointer Framework tokens.
     * 
     * @xerces.internal
     * 
     * @author Neil Delima, IBM
     * @version $Id: ElementSchemePointer.java,v 1.1.4.1 2005/09/08 05:25:43 sunithareddy Exp $
     * 
     */
    private final class Tokens {

        /**
         * XPointer element() scheme
         * [1]    ElementSchemeData    ::=    (NCName ChildSequence?) | ChildSequence  
         * [2]    ChildSequence    ::=    ('/' [1-9] [0-9]*)+ 
         */
        private static final int XPTRTOKEN_ELEM_NCNAME = 0;

        private static final int XPTRTOKEN_ELEM_CHILD = 1;

        // Token names
        private final String[] fgTokenNames = { "XPTRTOKEN_ELEM_NCNAME",
                "XPTRTOKEN_ELEM_CHILD" };

        // Token count
        private static final int INITIAL_TOKEN_COUNT = 1 << 8;

        private int[] fTokens = new int[INITIAL_TOKEN_COUNT];

        private int fTokenCount = 0;

        // Current token position
        private int fCurrentTokenIndex;

        private SymbolTable fSymbolTable;

        private Hashtable fTokenNames = new Hashtable();

        /**
         * Constructor 
         * 
         * @param symbolTable SymbolTable
         */
        private Tokens(SymbolTable symbolTable) {
            fSymbolTable = symbolTable;

            fTokenNames.put(new Integer(XPTRTOKEN_ELEM_NCNAME),
                    "XPTRTOKEN_ELEM_NCNAME");
            fTokenNames.put(new Integer(XPTRTOKEN_ELEM_CHILD),
                    "XPTRTOKEN_ELEM_CHILD");
        }

        /*
         * Returns the token String 
         * @param token The index of the token
         * @return String The token string
         */
        private String getTokenString(int token) {
            return (String) fTokenNames.get(new Integer(token));
        }

        /**
         * Returns the token String 
         * @param token The index of the token
         * @return String The token string
         */
        private Integer getToken(int token) {
            return (Integer) fTokenNames.get(new Integer(token));
        }

        /**
         * Add the specified string as a token
         *  
         * @param token The token string
         */
        private void addToken(String tokenStr) {
            Integer tokenInt = (Integer) fTokenNames.get(tokenStr);
            if (tokenInt == null) {
                tokenInt = new Integer(fTokenNames.size());
                fTokenNames.put(tokenInt, tokenStr);
            }
            addToken(tokenInt.intValue());
        }

        /**
         * Add the specified int token
         *  
         * @param token The int specifying the token
         */
        private void addToken(int token) {
            try {
                fTokens[fTokenCount] = token;
            } catch (ArrayIndexOutOfBoundsException ex) {
                int[] oldList = fTokens;
                fTokens = new int[fTokenCount << 1];
                System.arraycopy(oldList, 0, fTokens, 0, fTokenCount);
                fTokens[fTokenCount] = token;