Module java.xml

Class DocumentBuilder


  • public abstract class DocumentBuilder
    extends Object
    Defines the API to obtain DOM Document instances from an XML document. Using this class, an application programmer can obtain a Document from XML.

    An instance of this class can be obtained from the DocumentBuilderFactory.newDocumentBuilder() method. Once an instance of this class is obtained, XML can be parsed from a variety of input sources. These input sources are InputStreams, Files, URLs, and SAX InputSources.

    Note that this class reuses several classes from the SAX API. This does not require that the implementor of the underlying DOM implementation use a SAX parser to parse XML document into a Document. It merely requires that the implementation communicate with the application using these existing APIs.

    Since:
    1.4
    • Constructor Detail

      • DocumentBuilder

        protected DocumentBuilder()
        Protected constructor
    • Method Detail

      • reset

        public void reset()

        Reset this DocumentBuilder to its original configuration.

        DocumentBuilder is reset to the same state as when it was created with DocumentBuilderFactory.newDocumentBuilder(). reset() is designed to allow the reuse of existing DocumentBuilders thus saving resources associated with the creation of new DocumentBuilders.

        The reset DocumentBuilder is not guaranteed to have the same EntityResolver or ErrorHandler Objects, e.g. Object.equals(Object obj). It is guaranteed to have a functionally equal EntityResolver and ErrorHandler.

        Throws:
        UnsupportedOperationException - When implementation does not override this method.
        Since:
        1.5
      • isNamespaceAware

        public abstract boolean isNamespaceAware()
        Indicates whether or not this parser is configured to understand namespaces.
        Returns:
        true if this parser is configured to understand namespaces; false otherwise.
      • isValidating

        public abstract boolean isValidating()
        Indicates whether or not this parser is configured to validate XML documents.
        Returns:
        true if this parser is configured to validate XML documents; false otherwise.
      • setEntityResolver

        public abstract void setEntityResolver​(EntityResolver er)
        Specify the EntityResolver to be used to resolve entities present in the XML document to be parsed. Setting this to null will result in the underlying implementation using it's own default implementation and behavior.
        Parameters:
        er - The EntityResolver to be used to resolve entities present in the XML document to be parsed.
      • setErrorHandler

        public abstract void setErrorHandler​(ErrorHandler eh)
        Specify the ErrorHandler to be used by the parser. Setting this to null will result in the underlying implementation using it's own default implementation and behavior.
        Parameters:
        eh - The ErrorHandler to be used by the parser.
      • newDocument

        public abstract Document newDocument()
        Obtain a new instance of a DOM Document object to build a DOM tree with.
        Returns:
        A new instance of a DOM Document object.
      • getDOMImplementation

        public abstract DOMImplementation getDOMImplementation()
        Obtain an instance of a DOMImplementation object.
        Returns:
        A new instance of a DOMImplementation.
      • getSchema

        public Schema getSchema()

        Get a reference to the the Schema being used by the XML processor.

        If no schema is being used, null is returned.

        Returns:
        Schema being used or null if none in use
        Throws:
        UnsupportedOperationException - When implementation does not override this method
        Since:
        1.5