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Class ParserAdapter

java.lang.Object

org.xml.sax.helpers.ParserAdapter

All Implemented Interfaces:: DocumentHandler, XMLReader

public class ParserAdapter extends Object implements XMLReader, DocumentHandler

Adapt a SAX1 Parser as a SAX2 XMLReader.

This class wraps a SAX1 Parser and makes it act as a SAX2 XMLReader, with feature, property, and Namespace support. Note that it is not possible to report skippedEntity events, since SAX1 does not make that information available.

This adapter does not test for duplicate Namespace-qualified attribute names.

Since:

1.4, SAX 2.0

See Also:

Constructor Summary

Constructor	Description
`ParserAdapter()`	Construct a new parser adapter.
`ParserAdapter(Parser parser)`	Construct a new parser adapter.

Method Summary

Modifier and Type	Method	Description
`void`	`characters(char[] ch, int start, int length)`	Adapter implementation method; do not call.
`void`	`endDocument()`	Adapter implementation method; do not call.
`void`	`endElement(String qName)`	Adapter implementation method; do not call.
`ContentHandler`	`getContentHandler()`	Return the current content handler.
`DTDHandler`	`getDTDHandler()`	Return the current DTD handler.
`EntityResolver`	`getEntityResolver()`	Return the current entity resolver.
`ErrorHandler`	`getErrorHandler()`	Return the current error handler.
`boolean`	`getFeature(String name)`	Check a parser feature flag.
`Object`	`getProperty(String name)`	Get a parser property.
`void`	`ignorableWhitespace(char[] ch, int start, int length)`	Adapter implementation method; do not call.
`void`	`parse(String systemId)`	Parse an XML document.
`void`	`parse(InputSource input)`	Parse an XML document.
`void`	`processingInstruction(String target, String data)`	Adapter implementation method; do not call.
`void`	`setContentHandler(ContentHandler handler)`	Set the content handler.
`void`	`setDocumentLocator(Locator locator)`	Adapter implementation method; do not call.
`void`	`setDTDHandler(DTDHandler handler)`	Set the DTD handler.
`void`	`setEntityResolver(EntityResolver resolver)`	Set the entity resolver.
`void`	`setErrorHandler(ErrorHandler handler)`	Set the error handler.
`void`	`setFeature(String name, boolean value)`	Set a feature flag for the parser.
`void`	`setProperty(String name, Object value)`	Set a parser property.
`void`	`startDocument()`	Adapter implementation method; do not call.
`void`	`startElement(String qName, AttributeList qAtts)`	Adapter implementation method; do not call.

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ParserAdapter

public ParserAdapter() throws SAXException

Construct a new parser adapter.

Use the "org.xml.sax.parser" property to locate the embedded SAX1 driver.

Throws:: SAXException - If the embedded driver cannot be instantiated or if the org.xml.sax.parser property is not specified.

ParserAdapter

public ParserAdapter(Parser parser)

Construct a new parser adapter.

Note that the embedded parser cannot be changed once the adapter is created; to embed a different parser, allocate a new ParserAdapter.

Parameters:: parser - The SAX1 parser to embed.
Throws:: NullPointerException - If the parser parameter is null.

Method Details

setFeature

public void setFeature(String name, boolean value) throws SAXNotRecognizedException, SAXNotSupportedException

Set a feature flag for the parser.

The only features recognized are namespaces and namespace-prefixes.

Specified by:

setFeature in interface XMLReader

Parameters:

name - The feature name, as a complete URI.

value - The requested feature value.

Throws:

SAXNotRecognizedException - If the feature can't be assigned or retrieved.

SAXNotSupportedException - If the feature can't be assigned that value.

See Also:

getFeature

public boolean getFeature(String name) throws SAXNotRecognizedException, SAXNotSupportedException

Check a parser feature flag.

The only features recognized are namespaces and namespace-prefixes.

Specified by:

getFeature in interface XMLReader

Parameters:

name - The feature name, as a complete URI.

Returns:

The current feature value.

Throws:

SAXNotRecognizedException - If the feature value can't be assigned or retrieved.

SAXNotSupportedException - If the feature is not currently readable.

See Also:

setProperty

public void setProperty(String name, Object value) throws SAXNotRecognizedException, SAXNotSupportedException

Set a parser property.

No properties are currently recognized.

Specified by:

setProperty in interface XMLReader

Parameters:

name - The property name.

value - The property value.

Throws:

SAXNotRecognizedException - If the property value can't be assigned or retrieved.

SAXNotSupportedException - If the property can't be assigned that value.

See Also:

getProperty

public Object getProperty(String name) throws SAXNotRecognizedException, SAXNotSupportedException

Get a parser property.

No properties are currently recognized.

Specified by:

getProperty in interface XMLReader

Parameters:

name - The property name.

Returns:

The property value.

Throws:

SAXNotRecognizedException - If the property value can't be assigned or retrieved.

SAXNotSupportedException - If the property value is not currently readable.

See Also:

setEntityResolver

public void setEntityResolver(EntityResolver resolver)

Set the entity resolver.

Specified by:

setEntityResolver in interface XMLReader

Parameters:

resolver - The new entity resolver.

See Also:

getEntityResolver

public EntityResolver getEntityResolver()

Return the current entity resolver.

Specified by:

getEntityResolver in interface XMLReader

Returns:

The current entity resolver, or null if none was supplied.

See Also:

setDTDHandler

public void setDTDHandler(DTDHandler handler)

Set the DTD handler.

Specified by:

setDTDHandler in interface XMLReader

Parameters:

handler - the new DTD handler

See Also:

getDTDHandler

public DTDHandler getDTDHandler()

Return the current DTD handler.

Specified by:

getDTDHandler in interface XMLReader

Returns:

the current DTD handler, or null if none was supplied

See Also:

setContentHandler

public void setContentHandler(ContentHandler handler)

Set the content handler.

Specified by:

setContentHandler in interface XMLReader

Parameters:

handler - the new content handler

See Also:

getContentHandler

public ContentHandler getContentHandler()

Return the current content handler.

Specified by:

getContentHandler in interface XMLReader

Returns:

The current content handler, or null if none was supplied.

See Also:

setErrorHandler

public void setErrorHandler(ErrorHandler handler)

Set the error handler.

Specified by:

setErrorHandler in interface XMLReader

Parameters:

handler - The new error handler.

See Also:

getErrorHandler

public ErrorHandler getErrorHandler()

Return the current error handler.

Specified by:

getErrorHandler in interface XMLReader

Returns:

The current error handler, or null if none was supplied.

See Also:

parse

public void parse(String systemId) throws IOException, SAXException

Parse an XML document.

Specified by:

parse in interface XMLReader

Parameters:

systemId - The absolute URL of the document.

Throws:

IOException - If there is a problem reading the raw content of the document.

SAXException - If there is a problem processing the document.

See Also:

parse

public void parse(InputSource input) throws IOException, SAXException

Parse an XML document.

Specified by:

parse in interface XMLReader

Parameters:

input - An input source for the document.

Throws:

IOException - If there is a problem reading the raw content of the document.

SAXException - If there is a problem processing the document.

See Also:

setDocumentLocator

public void setDocumentLocator(Locator locator)

Adapter implementation method; do not call. Adapt a SAX1 document locator event.

Specified by:

setDocumentLocator in interface DocumentHandler

Parameters:

locator - A document locator.

See Also:

startDocument

public void startDocument() throws SAXException

Adapter implementation method; do not call. Adapt a SAX1 start document event.

Specified by:

startDocument in interface DocumentHandler

Throws:

SAXException - The client may raise a processing exception.

See Also:

endDocument

public void endDocument() throws SAXException

Adapter implementation method; do not call. Adapt a SAX1 end document event.

Specified by:

endDocument in interface DocumentHandler

Throws:

SAXException - The client may raise a processing exception.

See Also:

startElement

public void startElement(String qName, AttributeList qAtts) throws SAXException

Adapter implementation method; do not call. Adapt a SAX1 startElement event.

If necessary, perform Namespace processing.

Specified by:

startElement in interface DocumentHandler

Parameters:

qName - The qualified (prefixed) name.

qAtts - The XML attribute list (with qnames).

Throws:

SAXException - The client may raise a processing exception.

See Also:

endElement

public void endElement(String qName) throws SAXException

Adapter implementation method; do not call. Adapt a SAX1 end element event.

Specified by:

endElement in interface DocumentHandler

Parameters:

qName - The qualified (prefixed) name.

Throws:

SAXException - The client may raise a processing exception.

See Also:

characters

public void characters(char[] ch, int start, int length) throws SAXException

Adapter implementation method; do not call. Adapt a SAX1 characters event.

Specified by:

characters in interface DocumentHandler

Parameters:

ch - An array of characters.

start - The starting position in the array.

length - The number of characters to use.

Throws:

SAXException - The client may raise a processing exception.

See Also:

ignorableWhitespace

public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException

Adapter implementation method; do not call. Adapt a SAX1 ignorable whitespace event.

Specified by:

ignorableWhitespace in interface DocumentHandler

Parameters:

ch - An array of characters.

start - The starting position in the array.

length - The number of characters to use.

Throws:

SAXException - The client may raise a processing exception.

See Also:

processingInstruction

public void processingInstruction(String target, String data) throws SAXException

Adapter implementation method; do not call. Adapt a SAX1 processing instruction event.

Specified by:

processingInstruction in interface DocumentHandler

Parameters:

target - The processing instruction target.

data - The remainder of the processing instruction

Throws:

SAXException - The client may raise a processing exception.

See Also:

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https://docs.oracle.com/en/java/javase/21/docs/api/java.xml/org/xml/sax/helpers/ParserAdapter.html