Package org.apache.nutch.parse.html

Class DOMBuilder

    • Field Detail

      • m_doc

        public Document m_doc
        Root document

      • m_currentNode

        protected Node m_currentNode
        Current node

      • m_docFrag

        public DocumentFragment m_docFrag
        First node of document fragment or null if not a DocumentFragment

      • m_elemStack

        protected Stack<Element> m_elemStack
        Vector of element nodes

      • m_inCData

        protected boolean m_inCData
        Flag indicating that we are processing a CData section

    • Constructor Detail

      • DOMBuilder

        public DOMBuilder​(Document doc,
                  Node node)
        DOMBuilder instance constructor... it will add the DOM nodes to the document fragment.
        Parameters:
        doc - Root document
        node - Current node

      • DOMBuilder

        public DOMBuilder​(Document doc,
                  DocumentFragment docFrag)
        DOMBuilder instance constructor... it will add the DOM nodes to the document fragment.
        Parameters:
        doc - Root document
        docFrag - Document fragment

      • DOMBuilder

        public DOMBuilder​(Document doc)
        DOMBuilder instance constructor... it will add the DOM nodes to the document.
        Parameters:
        doc - Root document

    • Method Detail

      • getRootNode

        public Node getRootNode()
        Get the root node of the DOM being created. This is either a Document or a DocumentFragment.
        Returns:
        The root document or document fragment if not null

      • getCurrentNode

        public Node getCurrentNode()
        Get the node currently being processed.
        Returns:
        the current node being processed

      • getWriter

        public Writer getWriter()
        Return null since there is no Writer for this class.
        Returns:
        null

      • append

        protected void append​(Node newNode)
               throws SAXException
        Append a node to the current container.
        Parameters:
        newNode - New node to append
        Throws:
        SAXException - if text is found before the document element

      • setDocumentLocator

        public void setDocumentLocator​(Locator locator)
        Receive an object for locating the origin of SAX document events.

        SAX parsers are strongly encouraged (though not absolutely required) to supply a locator: if it does so, it must supply the locator to the application by invoking this method before invoking any of the other methods in the ContentHandler interface.

        The locator allows the application to determine the end position of any document-related event, even if the parser is not reporting an error. Typically, the application will use this information for reporting its own errors (such as character content that does not match an application's business rules). The information returned by the locator is probably not sufficient for use with a search engine.

        Note that the locator will return correct information only during the invocation of the events in this interface. The application should not attempt to use it at any other time.

        Specified by:
        setDocumentLocator in interface ContentHandler
        Parameters:
        locator - An object that can return the location of any SAX document event.
        See Also:
        Locator

      • startDocument

        public void startDocument()
                   throws SAXException
        Receive notification of the beginning of a document.

        The SAX parser will invoke this method only once, before any other methods in this interface or in DTDHandler (except for setDocumentLocator).

        Specified by:
        startDocument in interface ContentHandler
        Throws:
        SAXException

      • endDocument

        public void endDocument()
                 throws SAXException
        Receive notification of the end of a document.

        The SAX parser will invoke this method only once, and it will be the last method invoked during the parse. The parser shall not invoke this method until it has either abandoned parsing (because of an unrecoverable error) or reached the end of input.

        Specified by:
        endDocument in interface ContentHandler
        Throws:
        SAXException

      • startElement

        public void startElement​(String ns,
                         String localName,
                         String name,
                         Attributes atts)
                  throws SAXException
        Receive notification of the beginning of an element.

        The Parser will invoke this method at the beginning of every element in the XML document; there will be a corresponding endElement() event for every startElement() event (even when the element is empty). All of the element's content will be reported, in order, before the corresponding endElement() event.

        If the element name has a namespace prefix, the prefix will still be attached. Note that the attribute list provided will contain only attributes with explicit values (specified or defaulted): #IMPLIED attributes will be omitted.

        Specified by:
        startElement in interface ContentHandler
        Parameters:
        ns - The namespace of the node
        localName - The local part of the qualified name
        name - The element name.
        atts - The attributes attached to the element, if any.
        Throws:
        SAXException
        See Also:
        endElement(java.lang.String, java.lang.String, java.lang.String), Attributes

      • endElement

        public void endElement​(String ns,
                       String localName,
                       String name)
                throws SAXException
        Receive notification of the end of an element.

        The SAX parser will invoke this method at the end of every element in the XML document; there will be a corresponding startElement() event for every endElement() event (even when the element is empty).

        If the element name has a namespace prefix, the prefix will still be attached to the name.

        Specified by:
        endElement in interface ContentHandler
        Parameters:
        ns - the namespace of the element
        localName - The local part of the qualified name of the element
        name - The element name
        Throws:
        SAXException

      • setIDAttribute

        public void setIDAttribute​(String id,
                           Element elem)
        Set an ID string to node association in the ID table.
        Parameters:
        id - The ID string.
        elem - The associated ID.

      • characters

        public void characters​(char[] ch,
                       int start,
                       int length)
                throws SAXException
        Receive notification of character data.

        The Parser will call this method to report each chunk of character data. SAX parsers may return all contiguous character data in a single chunk, or they may split it into several chunks; however, all of the characters in any single event must come from the same external entity, so that the Locator provides useful information.

        The application must not attempt to read from the array outside of the specified range.

        Note that some parsers will report whitespace using the ignorableWhitespace() method rather than this one (validating parsers must do so).

        Specified by:
        characters in interface ContentHandler
        Parameters:
        ch - The characters from the XML document.
        start - The start position in the array.
        length - The number of characters to read from the array.
        Throws:
        SAXException
        See Also:
        ignorableWhitespace(char[], int, int), Locator

      • charactersRaw

        public void charactersRaw​(char[] ch,
                          int start,
                          int length)
                   throws SAXException
        If available, when the disable-output-escaping attribute is used, output raw text without escaping. A PI will be inserted in front of the node with the name "lotusxsl-next-is-raw" and a value of "formatter-to-dom".
        Parameters:
        ch - Array containing the characters
        start - Index to start of characters in the array
        length - Number of characters in the array
        Throws:
        SAXException - if text is found before the document element

      • entityReference

        public void entityReference​(String name)
                     throws SAXException
        Receive notivication of a entityReference.
        Parameters:
        name - name of the entity reference
        Throws:
        SAXException - if text is found before the document element

      • ignorableWhitespace

        public void ignorableWhitespace​(char[] ch,
                                int start,
                                int length)
                         throws SAXException
        Receive notification of ignorable whitespace in element content.

        Validating Parsers must use this method to report each chunk of ignorable whitespace (see the W3C XML 1.0 recommendation, section 2.10): non-validating parsers may also use this method if they are capable of parsing and using content models.

        SAX parsers may return all contiguous whitespace in a single chunk, or they may split it into several chunks; however, all of the characters in any single event must come from the same external entity, so that the Locator provides useful information.

        The application must not attempt to read from the array outside of the specified range.

        Specified by:
        ignorableWhitespace in interface ContentHandler
        Parameters:
        ch - The characters from the XML document.
        start - The start position in the array.
        length - The number of characters to read from the array.
        Throws:
        SAXException
        See Also:
        characters(char[], int, int)

      • processingInstruction

        public void processingInstruction​(String target,
                                  String data)
                           throws SAXException
        Receive notification of a processing instruction.

        The Parser will invoke this method once for each processing instruction found: note that processing instructions may occur before or after the main document element.

        A SAX parser should never report an XML declaration (XML 1.0, section 2.8) or a text declaration (XML 1.0, section 4.3.1) using this method.

        Specified by:
        processingInstruction in interface ContentHandler
        Parameters:
        target - The processing instruction target.
        data - The processing instruction data, or null if none was supplied.
        Throws:
        SAXException

      • comment

        public void comment​(char[] ch,
                    int start,
                    int length)
             throws SAXException
        Report an XML comment anywhere in the document. This callback will be used for comments inside or outside the document element, including comments in the external DTD subset (if read).
        Specified by:
        comment in interface LexicalHandler
        Parameters:
        ch - An array holding the characters in the comment.
        start - The starting position in the array.
        length - The number of characters to use from the array.
        Throws:
        SAXException

      • cdata

        public void cdata​(char[] ch,
                  int start,
                  int length)
           throws SAXException
        Receive notification of cdata.

        The Parser will call this method to report each chunk of character data. SAX parsers may return all contiguous character data in a single chunk, or they may split it into several chunks; however, all of the characters in any single event must come from the same external entity, so that the Locator provides useful information.

        The application must not attempt to read from the array outside of the specified range.

        Note that some parsers will report whitespace using the ignorableWhitespace() method rather than this one (validating parsers must do so).

        Parameters:
        ch - The characters from the XML document.
        start - The start position in the array.
        length - The number of characters to read from the array.
        Throws:
        SAXException - if text is found before the document element
        See Also:
        ignorableWhitespace(char[], int, int), Locator

      • startDTD

        public void startDTD​(String name,
                     String publicId,
                     String systemId)
              throws SAXException
        Report the start of DTD declarations, if any. Any declarations are assumed to be in the internal subset unless otherwise indicated.
        Specified by:
        startDTD in interface LexicalHandler
        Parameters:
        name - The document type name.
        publicId - The declared public identifier for the external DTD subset, or null if none was declared.
        systemId - The declared system identifier for the external DTD subset, or null if none was declared.
        Throws:
        SAXException
        See Also:
        endDTD(), startEntity(java.lang.String)

      • startPrefixMapping

        public void startPrefixMapping​(String prefix,
                               String uri)
                        throws SAXException
        Begin the scope of a prefix-URI Namespace mapping.

        The information from this event is not necessary for normal Namespace processing: the SAX XML reader will automatically replace prefixes for element and attribute names when the http://xml.org/sax/features/namespaces feature is true (the default).

        There are cases, however, when applications need to use prefixes in character data or in attribute values, where they cannot safely be expanded automatically; the start/endPrefixMapping event supplies the information to the application to expand prefixes in those contexts itself, if necessary.

        Note that start/endPrefixMapping events are not guaranteed to be properly nested relative to each-other: all startPrefixMapping events will occur before the corresponding startElement event, and all endPrefixMapping events will occur after the corresponding endElement event, but their order is not guaranteed.

        Specified by:
        startPrefixMapping in interface ContentHandler
        Parameters:
        prefix - The Namespace prefix being declared.
        uri - The Namespace URI the prefix is mapped to.
        Throws:
        SAXException
        See Also:
        endPrefixMapping(java.lang.String), startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)

      • skippedEntity

        public void skippedEntity​(String name)
                   throws SAXException
        Receive notification of a skipped entity.

        The Parser will invoke this method once for each entity skipped. Non-validating processors may skip entities if they have not seen the declarations (because, for example, the entity was declared in an external DTD subset). All processors may skip external entities, depending on the values of the http://xml.org/sax/features/external-general-entities and the http://xml.org/sax/features/external-parameter-entities properties.

        Specified by:
        skippedEntity in interface ContentHandler
        Parameters:
        name - The name of the skipped entity. If it is a parameter entity, the name will begin with '%'.
        Throws:
        SAXException