Examples of org.apache.xerces.util.SymbolTable

org.apache.xerces.util.SymbolTable
This class is a symbol table implementation that guarantees that strings used as identifiers are unique references. Multiple calls to addSymbol will always return the same string reference.
The symbol table performs the same task as String.intern() with the following differences:
- A new string object does not need to be created in order to retrieve a unique reference. Symbols can be added by using a series of characters in a character array.
- Users of the symbol table can provide their own symbol hashing implementation. For example, a simple string hashing algorithm may fail to produce a balanced set of hashcodes for symbols that are mostly unique. Strings with similar leading characters are especially prone to this poor hashing behavior.
@see SymbolHasher @author Stubs generated by DesignDoc on Wed Jun 07 11:58:44 PDT 2000 @author Andy Clark @version $Id: SymbolTable.java,v 1.1.2.2 2000/10/02 00:40:14 lehors Exp $

     */
    public void reset(XMLComponentManager componentManager) 
        throws XNIException {
        
        // get symbol table
        SymbolTable symbols = (SymbolTable)componentManager.getProperty(SYMBOL_TABLE);
        
        // symbolizes the strings
        XPath.Step[] steps = fLocationPath.steps;
        for (int i = 0; i < steps.length; i++) {
            QName name = steps[i].nodeTest.name;
            if (name.prefix != null) {
                name.prefix = symbols.addSymbol(name.prefix);
            }
            if (name.localpart != null) {
                name.localpart = symbols.addSymbol(name.localpart);
            }
            if (name.rawname != null) {
                name.rawname = symbols.addSymbol(name.rawname);
            }
            if (name.uri != null) {
                name.uri = symbols.addSymbol(name.uri);
            }
        }


        // reset namespace support
        fNamespaceContext.reset(symbols);

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    /** Main program. */
    public static void main(String[] argv) throws Exception {


        if (DEBUG_ANY) {
            for (int i = 0; i < argv.length; i++) {
                final SymbolTable symbols = new SymbolTable();
                final String expr = argv[i];
                final XPath xpath = new XPath(expr, null);
                final XPathMatcher matcher = new XPathMatcher(xpath);
                matcher.reset(new XMLComponentManager() {
                    public boolean getFeature(String featureId) throws XMLConfigurationException {

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        // features
        fNamespaces = fConfiguration.getFeature(NAMESPACES);
        fNamespacePrefixes = fConfiguration.getFeature(NAMESPACE_PREFIXES);


        // save needed symbols
        SymbolTable symbolTable = (SymbolTable)fConfiguration.getProperty(SYMBOL_TABLE);
        if (symbolTable != null) {
            fEmptySymbol = symbolTable.addSymbol("");
            fXmlnsSymbol = symbolTable.addSymbol("xmlns");
        }


    } // reset()

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        };
        addRecognizedProperties(recognizedProperties);


        if (symbolTable == null) {
            if (fSymbolTable == null) {
                fSymbolTable = new SymbolTable();
                fProperties.put(SYMBOL_TABLE, fSymbolTable);
            }
        }
        else {
            fSymbolTable = symbolTable;

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    // Constructors
    //


    /** Default constructor. */
    public CachingParserPool() {
        this(new SymbolTable(), new GrammarPool());
    } // <init>()

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    // factory methods


    /** Creates a new DOM parser. */
    public DOMParser createDOMParser() {
        SymbolTable symbolTable = fShadowSymbolTable
                                ? new ShadowedSymbolTable(fSynchronizedSymbolTable)
                                : fSynchronizedSymbolTable;
        GrammarPool grammarPool = fShadowGrammarPool
                                ? new ShadowedGrammarPool(fSynchronizedGrammarPool)
                                : fSynchronizedGrammarPool;

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        return new DOMParser(symbolTable, grammarPool);
    } // createDOMParser():DOMParser


    /** Creates a new SAX parser. */
    public SAXParser createSAXParser() {
        SymbolTable symbolTable = fShadowSymbolTable
                                ? new ShadowedSymbolTable(fSynchronizedSymbolTable)
                                : fSynchronizedSymbolTable;
        GrammarPool grammarPool = fShadowGrammarPool
                                ? new ShadowedGrammarPool(fSynchronizedGrammarPool)
                                : fSynchronizedGrammarPool;

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            ENTITY_RESOLVER,
        };
        addRecognizedProperties(recognizedProperties);


        if (symbolTable == null) {
            symbolTable = new SymbolTable();
        }
        fSymbolTable = symbolTable;
        setProperty(SYMBOL_TABLE, fSymbolTable);


    } // <init>(SymbolTable)

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    // Constructors
    //


    /** Default constructor. */
    public XMLGrammarPreparser() {
        this(new SymbolTable());
    } // <init>()

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        // now we have all our arguments.  We only
        // need to parse the DTD's/schemas, put them
        // in a grammar pool, possibly instantiate an 
        // appropriate configuration, and we're on our way.


        SymbolTable sym = new SymbolTable(BIG_PRIME);
        XMLGrammarPreparser preparser = new XMLGrammarPreparser(sym);
        XMLGrammarPoolImpl grammarPool = new XMLGrammarPoolImpl();
        boolean isDTD = false;
        if(externalDTDs != null) {
            preparser.registerPreparser(XMLGrammarDescription.XML_DTD, null);

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