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javax.xml.parsers

Class DocumentBuilder

public abstract class DocumentBuilder
extends java.lang.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.

Version:
$Revision: 226208 $, $Date: 2005-06-03 20:28:57 +0200 (Fri, 03 Jun 2005) $
Author:
Jeff Suttor

Constructor Summary

DocumentBuilder()
Protected constructor

Method Summary

abstract DOMImplementation
getDOMImplementation()
Obtain an instance of a DOMImplementation object.
Schema
getSchema()
Get a reference to the the Schema being used by the XML processor.
abstract boolean
isNamespaceAware()
Indicates whether or not this parser is configured to understand namespaces.
abstract boolean
isValidating()
Indicates whether or not this parser is configured to validate XML documents.
boolean
isXIncludeAware()
Get the XInclude processing mode for this parser.
abstract Document
newDocument()
Obtain a new instance of a DOM Document object to build a DOM tree with.
Document
parse(File f)
Parse the content of the given file as an XML document and return a new DOM Document object.
Document
parse(InputStream is)
Parse the content of the given InputStream as an XML document and return a new DOM Document object.
Document
parse(InputStream is, String systemId)
Parse the content of the given InputStream as an XML document and return a new DOM Document object.
Document
parse(String uri)
Parse the content of the given URI as an XML document and return a new DOM Document object.
abstract Document
parse(InputSource is)
Parse the content of the given input source as an XML document and return a new DOM Document object.
void
reset()
Reset this DocumentBuilder to its original configuration.
abstract void
setEntityResolver(EntityResolver er)
Specify the EntityResolver to be used to resolve entities present in the XML document to be parsed.
abstract void
setErrorHandler(ErrorHandler eh)
Specify the ErrorHandler to be used by the parser.

Constructor Details

DocumentBuilder

protected DocumentBuilder()
Protected constructor

Method Details

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
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.

isXIncludeAware

public boolean isXIncludeAware()
Get the XInclude processing mode for this parser.
Returns:
the return value of the DocumentBuilderFactory.isXIncludeAware() when this parser was created from factory.
Since:
1.5
See Also:
DocumentBuilderFactory.setXIncludeAware(boolean)

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.

parse

public Document parse(File f)
            throws SAXException,
                   IOException
Parse the content of the given file as an XML document and return a new DOM Document object. An IllegalArgumentException is thrown if the File is null null.
Parameters:
f - The file containing the XML to parse.
Returns:
A new DOM Document object.
Throws:
SAXException - If any parse errors occur.
See Also:
DocumentHandler

parse

public Document parse(InputStream is)
            throws SAXException,
                   IOException
Parse the content of the given InputStream as an XML document and return a new DOM Document object. An IllegalArgumentException is thrown if the InputStream is null.
Parameters:
is - InputStream containing the content to be parsed.
Returns:
Document result of parsing the InputStream
Throws:
SAXException - If any parse errors occur.
See Also:
DocumentHandler

parse

public Document parse(InputStream is,
                      String systemId)
            throws SAXException,
                   IOException
Parse the content of the given InputStream as an XML document and return a new DOM Document object. An IllegalArgumentException is thrown if the InputStream is null.
Parameters:
is - InputStream containing the content to be parsed.
systemId - Provide a base for resolving relative URIs.
Returns:
A new DOM Document object.
Throws:
SAXException - If any parse errors occur.
See Also:
DocumentHandler

parse

public Document parse(String uri)
            throws SAXException,
                   IOException
Parse the content of the given URI as an XML document and return a new DOM Document object. An IllegalArgumentException is thrown if the URI is null null.
Parameters:
uri - The location of the content to be parsed.
Returns:
A new DOM Document object.
Throws:
SAXException - If any parse errors occur.
See Also:
DocumentHandler

parse

public abstract Document parse(InputSource is)
            throws SAXException,
                   IOException
Parse the content of the given input source as an XML document and return a new DOM Document object. An IllegalArgumentException is thrown if the InputSource is null null.
Parameters:
is - InputSource containing the content to be parsed.
Returns:
A new DOM Document object.
Throws:
SAXException - If any parse errors occur.
See Also:
DocumentHandler

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.

Since:
1.5

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.

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