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HTMLBuilder.javaAPI DocApache Xerces 3.0.17722Fri Sep 14 20:33:54 BST 2007org.apache.html.dom

HTMLBuilder

public class HTMLBuilder extends Object implements DocumentHandler
This is a SAX document handler that is used to build an HTML document. It can build a document from any SAX parser, but is specifically tuned for working with the OpenXML HTML parser.
version
$Revision: 449313 $ $Date: 2006-09-23 18:01:43 -0400 (Sat, 23 Sep 2006) $
author
Assaf Arkin

Fields Summary
protected HTMLDocumentImpl
_document
The document that is being built.
protected org.apache.xerces.dom.ElementImpl
_current
The current node in the document into which elements, text and other nodes will be inserted. This starts as the document itself and reflects each element that is currently being parsed.
private boolean
_ignoreWhitespace
Applies only to whitespace appearing between element tags in element content, as per the SAX definition, and true by default.
private boolean
_done
Indicates whether finished building a document. If so, can start building another document. Must be initially true to get the first document processed.
protected Vector
_preRootNodes
The document is only created the same time as the document element, however, certain nodes may precede the document element (comment and PI), and they are accumulated in this vector.
Constructors Summary
Methods Summary
public voidcharacters(java.lang.String text)

	if ( _current == null )
            throw new SAXException( "HTM009 State error: character data found outside of root element." );
	_current.appendChild( new TextImpl( _document, text ) );
public voidcharacters(char[] text, int start, int length)

	if ( _current == null )
            throw new SAXException( "HTM010 State error: character data found outside of root element." );
	_current.appendChild( new TextImpl( _document, new String( text, start, length ) ) );
public voidendDocument()

        if ( _document == null )
            throw new SAXException( "HTM002 State error: document never started or missing document element." );
	if ( _current != null )
	    throw new SAXException( "HTM003 State error: document ended before end of document element." );
        _current = null;
	_done = true;
public voidendElement(java.lang.String tagName)

        if ( _current == null )
            throw new SAXException( "HTM007 State error: endElement called with no current node." );
	if ( ! _current.getNodeName().equalsIgnoreCase( tagName ))
	    throw new SAXException( "HTM008 State error: mismatch in closing tag name " + tagName + "\n" + tagName);

	// Move up to the parent element. When you reach the top (closing the root element).
	// the parent is document and current is null.
	if ( _current.getParentNode() == _current.getOwnerDocument() )
	    _current = null;
	else
	    _current = (ElementImpl) _current.getParentNode();
public org.w3c.dom.html.HTMLDocumentgetHTMLDocument()

        return _document;
public voidignorableWhitespace(char[] text, int start, int length)

        
        if ( ! _ignoreWhitespace )
	    _current.appendChild( new TextImpl( _document, new String( text, start, length ) ) );
public voidprocessingInstruction(java.lang.String target, java.lang.String instruction)

        
	// Processing instruction may appear before the document element (in fact, before the
	// document has been created, or after the document element has been closed.
        if ( _current == null && _document == null )
	{
	    if ( _preRootNodes == null )
		_preRootNodes = new Vector();
	    _preRootNodes.addElement( new ProcessingInstructionImpl( null, target, instruction ) );
	}
	else
        if ( _current == null && _document != null )
	    _document.appendChild( new ProcessingInstructionImpl( _document, target, instruction ) );
	else
	    _current.appendChild( new ProcessingInstructionImpl( _document, target, instruction ) );
public voidsetDocumentLocator(org.xml.sax.Locator locator)

        // ignored
public voidstartDocument()


    
      
         
    
        if ( ! _done )
	    throw new SAXException( "HTM001 State error: startDocument fired twice on one builder." );
	_document = null;
	_done = false;
public synchronized voidstartElement(java.lang.String tagName, org.xml.sax.AttributeList attrList)

        ElementImpl elem;
        int         i;
        
	if ( tagName == null )
	    throw new SAXException( "HTM004 Argument 'tagName' is null." );

	// If this is the root element, this is the time to create a new document,
	// because only know we know the document element name and namespace URI.
	if ( _document == null )
	{
	    // No need to create the element explicitly.
	    _document = new HTMLDocumentImpl();
	    elem = (ElementImpl) _document.getDocumentElement();
	    _current = elem;
	    if ( _current == null )
		throw new SAXException( "HTM005 State error: Document.getDocumentElement returns null." );

	    // Insert nodes (comment and PI) that appear before the root element.
	    if ( _preRootNodes != null )
	    {
		for ( i = _preRootNodes.size() ; i-- > 0 ; )
		    _document.insertBefore( (Node) _preRootNodes.elementAt( i ), elem );
		_preRootNodes = null;
	    }
	     
	}
	else
	{
	    // This is a state error, indicates that document has been parsed in full,
	    // or that there are two root elements.
	    if ( _current == null )
		throw new SAXException( "HTM006 State error: startElement called after end of document element." );
	    elem = (ElementImpl) _document.createElement( tagName );
	    _current.appendChild( elem );
	    _current = elem;
	}

	// Add the attributes (specified and not-specified) to this element.
        if ( attrList != null )
        {
            for ( i = 0 ; i < attrList.getLength() ; ++ i )
                elem.setAttribute( attrList.getName( i ), attrList.getValue( i ) );
        }