Enhydra 3.1 API

org.apache.xalan.xslt
Class StylesheetHandler

java.lang.Object
  |
  +--org.apache.xalan.xslt.StylesheetHandler

public class StylesheetHandler
extends java.lang.Object
implements DocumentHandler, EntityResolver

Initializes and processes a stylesheet via SAX events. If you need to alter the code in here, it is not for the faint-of-heart, due to the state tracking that has to be done due to the SAX event model.


Field Summary
 java.lang.String m_includeBase
          This will act as a stack of sorts to keep track of the current include base.
 
Constructor Summary
StylesheetHandler(XSLTEngineImpl processor, Stylesheet stylesheetTree)
          FormatterToText instance constructor...
 
Method Summary
 void cdata(char[] ch, int start, int length)
          Receive notification of cdata.
 void characters(char[] ch, int start, int length)
          Receive notification of character data.
 void comment(java.lang.String data)
          Called when a Comment is to be constructed.
 void endDocument()
          Receive notification of the end of a document.
 void endElement(java.lang.String name)
          Receive notification of the end of an element.
 void entityReference(java.lang.String name)
          Receive notivication of a entityReference.
 void ignorableWhitespace(char[] ch, int start, int length)
          Receive notification of ignorable whitespace in element content.
static boolean isSpace(char ch)
          Returns whether the specified ch conforms to the XML 1.0 definition of whitespace.
 boolean isWhiteSpace(char[] ch, int start, int length)
          Tell if the string is whitespace.
 void processingInstruction(java.lang.String target, java.lang.String data)
          Receive notification of a processing instruction.
 InputSource resolveEntity(java.lang.String publicId, java.lang.String systemId)
          Catch the entity resolving, and fix up the stack.
 void setDocumentLocator(Locator locator)
          Receive an object for locating the origin of SAX document events.
 void startDocument()
          Receive notification of the beginning of a document.
 void startElement(java.lang.String name, AttributeList atts)
          Receive notification of the beginning of an element.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

m_includeBase

public java.lang.String m_includeBase
This will act as a stack of sorts to keep track of the current include base.
Constructor Detail

StylesheetHandler

public StylesheetHandler(XSLTEngineImpl processor,
                         Stylesheet stylesheetTree)
FormatterToText instance constructor... it will add the DOM nodes to the document fragment.
Method Detail

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 DocumentHandler 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 DocumentHandler
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 DocumentHandler
Throws:
SAXException - Any SAX exception, possibly wrapping another exception.

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 DocumentHandler
Throws:
SAXException - Any SAX exception, possibly wrapping another exception.

startElement

public void startElement(java.lang.String name,
                         AttributeList 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 DocumentHandler
Parameters:
name - The element type name.
atts - The attributes attached to the element, if any.
Throws:
SAXException - Any SAX exception, possibly wrapping another exception.
See Also:
endElement(java.lang.String), AttributeList

resolveEntity

public InputSource resolveEntity(java.lang.String publicId,
                                 java.lang.String systemId)
                          throws SAXException,
                                 java.io.IOException
Catch the entity resolving, and fix up the stack.
Specified by:
resolveEntity in interface EntityResolver
Tags copied from interface: EntityResolver
Parameters:
publicId - The public identifier of the external entity being referenced, or null if none was supplied.
systemId - The system identifier of the external entity being referenced.
Returns:
An InputSource object describing the new input source, or null to request that the parser open a regular URI connection to the system identifier.
Throws:
SAXException - Any SAX exception, possibly wrapping another exception.
java.io.IOException - A Java-specific IO exception, possibly the result of creating a new InputStream or Reader for the InputSource.
See Also:
InputSource

endElement

public void endElement(java.lang.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 DocumentHandler
Parameters:
name - The element type name
Throws:
SAXException - Any SAX exception, possibly wrapping another exception.

isSpace

public static boolean isSpace(char ch)
Returns whether the specified ch conforms to the XML 1.0 definition of whitespace. Refer to the definition of S for details.
Parameters:
ch - Character to check as XML whitespace.
Returns:
=true if ch is XML whitespace; otherwise =false.

isWhiteSpace

public boolean isWhiteSpace(char[] ch,
                            int start,
                            int length)
Tell if the string is whitespace.
Parameters:
string - String to be trimmed.
Returns:
The trimmed string.

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 DocumentHandler
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 - Any SAX exception, possibly wrapping another exception.
See Also:
ignorableWhitespace(char[], int, int), Locator

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 - Any SAX exception, possibly wrapping another exception.
See Also:
ignorableWhitespace(char[], int, int), Locator

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 DocumentHandler
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 - Any SAX exception, possibly wrapping another exception.
See Also:
characters(char[], int, int)

processingInstruction

public void processingInstruction(java.lang.String target,
                                  java.lang.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 DocumentHandler
Parameters:
target - The processing instruction target.
data - The processing instruction data, or null if none was supplied.
Throws:
SAXException - Any SAX exception, possibly wrapping another exception.

comment

public void comment(java.lang.String data)
             throws SAXException
Called when a Comment is to be constructed.
Parameters:
data - The comment data.
Throws:
SAXException - Any SAX exception, possibly wrapping another exception.

entityReference

public void entityReference(java.lang.String name)
                     throws SAXException
Receive notivication of a entityReference.

Enhydra 3.1 API