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javaxml/XMLInputStreamImpl.java  view on Meta::CPAN

    //////////////////////////////////////////////////////////////////////

    /**
     * Re-initialize the variables for each parse.
     */
    private void initializeVariables ()
    {
	// First line
	line = 1;
	column = 0;

	// Set up the buffers for data and names
	dataBufferPos = 0;
	dataBuffer = new char [DATA_BUFFER_INITIAL];
	nameBufferPos = 0;
	nameBuffer = new char [NAME_BUFFER_INITIAL];

	// Set up the DTD hash tables
	entityInfo = new Hashtable<String, Object[]> ();

	// Set up the variables for the current
	// element context.
	currentElement = null;

	// Set up the input variables
	sourceType = INPUT_NONE;
	inputStack = new Stack<Object[]> ();
	readBufferOverflow = -1;

	symbolTable = new Object [SYMBOL_TABLE_LENGTH][];
    }


    /**
     * Clean up after the parse to allow some garbage collection.
     */
    private void cleanupVariables ()
    {
	dataBuffer = null;
	nameBuffer = null;

	entityInfo = null;

	currentElement = null;

	inputStack = null;

	symbolTable = null;
    }

    //
    // I/O information.
    //
    private Stack<Object[]>	inputStack; 	// stack of input soruces
    private int		line; 		// current line number
    private int		column; 	// current column number
    private int		sourceType; 	// type of input source
    private int		currentByteCount; // bytes read from current source

    //
    // Buffers for decoded but unparsed character input.
    //
    private char	readBuffer [];
    private int		readBufferPos;
    private int		readBufferLength;
    private int		readBufferOverflow;  // overflow from last data chunk.


    //
    // Buffer for undecoded raw byte input.
    //
    private final static int READ_BUFFER_MAX = 16384;


    //
    // Buffer for parsed character data.
    //
    private static int DATA_BUFFER_INITIAL = 4096;
    private char	dataBuffer [];
    private int		dataBufferPos;

    //
    // Buffer for parsed names.
    //
    private static int NAME_BUFFER_INITIAL = 1024;
    private char	nameBuffer [];
    private int		nameBufferPos;


    //
    // Hashtables for DTD information on elements, entities, and notations.
    //
    private Hashtable<String, Object[]>	entityInfo;


    //
    // Element type currently in force.
    //
    private String	currentElement;

    //
    // Symbol table, for caching interned names.
    //
    private final static int SYMBOL_TABLE_LENGTH = 1087;
    private Object	symbolTable [][];

    //
    // Utility flag: have we noticed a CR while reading the last
    // data chunk?  If so, we will have to go back and normalise
    // CR or CR/LF line ends.
    //
    private boolean	sawCR;

}