org.apache.xml.resolver.readers
public class SAXCatalogReader extends Object implements CatalogReader, ContentHandler, DocumentHandler
This class is used to read XML Catalogs using the SAX. This reader has an advantage over the DOM-based reader in that it functions on the stream of SAX events. It has the disadvantage that it cannot look around in the tree.
Since the choice of CatalogReaders (in the InputStream case) can only be made on the basis of MIME type, the following problem occurs: only one CatalogReader can exist for all XML mime types. In order to get around this problem, the SAXCatalogReader relies on a set of external CatalogParsers to actually build the catalog.
The selection of CatalogParsers is made on the basis of the QName of the root element of the document.
Version: 1.0
See Also: Catalog CatalogReader SAXCatalogReader TextCatalogReader
Field Summary | |
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protected Debug | debug The debug class to use for this reader.
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protected Hashtable | namespaceMap
Mapping table from QNames to CatalogParser classes.
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protected String | parserClass The SAX Parser Class |
protected SAXParserFactory | parserFactory The SAX Parser Factory |
Constructor Summary | |
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SAXCatalogReader() The constructor | |
SAXCatalogReader(SAXParserFactory parserFactory) The constructor | |
SAXCatalogReader(String parserClass) The constructor |
Method Summary | |
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void | characters(char[] ch, int start, int length) The SAX characters method. |
void | endDocument() The SAX endDocument method. |
void | endElement(String name) The SAX endElement method. |
void | endElement(String namespaceURI, String localName, String qName) The SAX2 endElement method. |
void | endPrefixMapping(String prefix) The SAX endPrefixMapping method. |
String | getCatalogParser(String namespaceURI, String rootElement) Get the SAXCatalogParser class for the given namespace/root
element type. |
String | getParserClass() Get the parser class currently in use. |
SAXParserFactory | getParserFactory() Get the parser factory currently in use. |
void | ignorableWhitespace(char[] ch, int start, int length) The SAX ignorableWhitespace method. |
void | processingInstruction(String target, String data) The SAX processingInstruction method. |
void | readCatalog(Catalog catalog, String fileUrl)
Parse an XML Catalog file.
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void | readCatalog(Catalog catalog, InputStream is)
Parse an XML Catalog stream.
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void | setCatalogParser(String namespaceURI, String rootElement, String parserClass) Set the SAXCatalogParser class for the given namespace/root
element type. |
void | setDocumentLocator(Locator locator) The SAX setDocumentLocator method. |
void | setParserClass(String parserClass) Set the XML SAX Parser Class |
void | setParserFactory(SAXParserFactory parserFactory) Set the XML SAX Parser Factory. |
void | skippedEntity(String name) The SAX skippedentity method. |
void | startDocument() The SAX startDocument method. |
void | startElement(String name, AttributeList atts)
The SAX startElement method.
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void | startElement(String namespaceURI, String localName, String qName, Attributes atts)
The SAX2 startElement method.
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void | startPrefixMapping(String prefix, String uri) The SAX startPrefixMapping method. |
Each key in this hash table has the form "elementname" or "{namespaceuri}elementname". The former is used if the namespace URI is null.
characters
method. Does nothing.endDocument
method. Does nothing.endElement
method. Does nothing.endElement
method. Does nothing.endPrefixMapping
method. Does nothing.ignorableWhitespace
method. Does nothing.processingInstruction
method. Does nothing.Parameters: catalog The catalog to which this catalog file belongs fileUrl The URL or filename of the catalog file to process
Throws: MalformedURLException Improper fileUrl IOException Error reading catalog file
Parameters: catalog The catalog to which this catalog file belongs is The input stream from which the catalog will be read
Throws: MalformedURLException Improper fileUrl IOException Error reading catalog file CatalogException A Catalog exception
setDocumentLocator
method. Does nothing.skippedentity
method. Does nothing.startDocument
method. Does nothing.startElement
method.
The catalog parser is selected based on the namespace of the first element encountered in the catalog.
startElement
method.
The catalog parser is selected based on the namespace of the first element encountered in the catalog.
startPrefixMapping
method. Does nothing.