Package com.microstrategy.utils.xml

Class AbstractHandler

java.lang.Object

org.xml.sax.helpers.DefaultHandler

com.microstrategy.utils.xml.AbstractHandler

All Implemented Interfaces:

org.xml.sax.ContentHandler, org.xml.sax.DTDHandler, org.xml.sax.EntityResolver, org.xml.sax.ErrorHandler

Direct Known Subclasses:

AbstractHandlerWithText, ImportSaveRWDTask.ImportDashboardResultHandler, MSTRCheckedException.ExceptionXMLHandler, MSTRLayoutParser.ParserContentHandler, PlatformAnalyticsStatisticsTableSettingResponseHandler, RWUnitInfoImpl.UnitInfoHandler, SaveDBRoleTask.DBObjectsHandler, SaxToDomHandler, SAXXMLStringDumper, WebExpressionParser.AttributeElementListHandler, WebExpressionParser.AttributeFormExpressionHandler, WebExpressionParser.AttributeFormQualHandler, WebExpressionParser.ConstantHandler, WebExpressionParser.MetricExpressionHandler, WebExpressionParser.MetricQualHandler

public abstract class AbstractHandler
extends org.xml.sax.helpers.DefaultHandler

A base class for content handlers

Since:

MicroStrategy Web 7.3.1 or earlier

Field Summary

Fields

Modifier and Type	Field	Description
protected java.lang.StringBuffer	buf	Deprecated. use getText() to acquire String of internal buffer
protected int	depth	The element depth count.
protected SAXSupport	parser	A reference to the SAX parser to which the handler is attached

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractHandler()	Default constructor.
protected	AbstractHandler(SAXSupport pParser)	Initializes the handler and attaches it to the parser.

Method Summary

Modifier and Type	Method	Description
void	characters(char[] ch, int start, int length)
void	clearText()
protected abstract void	doEndElement(java.lang.String uri, java.lang.String local, java.lang.String qName)	Override this method insted of endElement to process end element event.
protected void	doStartElement(java.lang.String uri, java.lang.String local, java.lang.String qName, AttributesXt attrsXt)
protected void	doStartElement(java.lang.String uri, java.lang.String local, java.lang.String qName, org.xml.sax.Attributes attrs)	Override this method insted of startElement to process start element event.
void	endDocument()	This is a safegurd against forgetting to pop out inner handlers.
void	endElement(java.lang.String uri, java.lang.String local, java.lang.String qName)	The default implementation that calls doEndElement then reduces the depth count.
float	getFloatValue()
int	getIntValue()
java.lang.String	getText()
protected void	popContentHandler(java.lang.String uri, java.lang.String local, java.lang.String qName)
protected void	setLogErrors(boolean value)
void	startElement(java.lang.String uri, java.lang.String local, java.lang.String qName, org.xml.sax.Attributes attrs)	The default implementation that simply increases the depth count. and then calls doStartElement method.

Methods inherited from class org.xml.sax.helpers.DefaultHandler

endPrefixMapping, error, fatalError, ignorableWhitespace, notationDecl, processingInstruction, resolveEntity, setDocumentLocator, skippedEntity, startDocument, startPrefixMapping, unparsedEntityDecl, warning

Methods inherited from class java.lang.Object

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

Field Detail

buf

@Deprecated
protected java.lang.StringBuffer buf

Deprecated.

use getText() to acquire String of internal buffer

A buffer to accumulate element text.

Since:

MicroStrategy Web 8.0.0

depth

protected int depth

The element depth count. It is relative to the handler's root element, an element at which this handler was attached to the parser. Whenever a handler receives the startElement event it increases this counter. Whenever the handler receives the endElement event it decreases the counter. When the counter becomes zero the handler pops itself from the handler stack. Real handler shall use this variable to optimize content handlers. They shall first check the depth and then check for tag names that are expected at this depth.

parser

protected SAXSupport parser

A reference to the SAX parser to which the handler is attached

Constructor Detail

AbstractHandler

protected AbstractHandler()

Default constructor.

AbstractHandler

protected AbstractHandler(SAXSupport pParser)

Initializes the handler and attaches it to the parser.

Parameters:

pParser - - a SAX parser to which this handler needs to be attached

Method Detail

setLogErrors

protected void setLogErrors(boolean value)

Since:

MicroStrategy Web 8.0.0

startElement

public void startElement(java.lang.String uri,
                         java.lang.String local,
                         java.lang.String qName,
                         org.xml.sax.Attributes attrs)
                  throws org.xml.sax.SAXException

The default implementation that simply increases the depth count. and then calls doStartElement method. Override the doStartElement method insted of this one to process start element event. This way you will not have problems with depth counter while subclassing your event handlers.

When overriding this method you shall either call supper or simply start your code with depth++; statement (which is faster).

Specified by:

startElement in interface org.xml.sax.ContentHandler

Overrides:

startElement in class org.xml.sax.helpers.DefaultHandler

Parameters:

uri - The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed.

local - The local name (without prefix), or the empty string if Namespace processing is not being performed.

qName - The qualified name (with prefix), or the empty string if qualified names are not available.

attrs - The attributes attached to the element. If there are no attributes, it shall be an empty Attributes object

Throws:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception

doStartElement

protected void doStartElement(java.lang.String uri,
                              java.lang.String local,
                              java.lang.String qName,
                              AttributesXt attrsXt)
                       throws java.lang.Exception

Throws:

java.lang.Exception

Since:

MicroStrategy Web 8.0.0

doStartElement

protected void doStartElement(java.lang.String uri,
                              java.lang.String local,
                              java.lang.String qName,
                              org.xml.sax.Attributes attrs)
                       throws java.lang.Exception

Override this method insted of startElement to process start element event. This way you will not have problems with depth counter while subclassing your event handlers.

Throws:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception

java.lang.Exception

endElement

public void endElement(java.lang.String uri,
                       java.lang.String local,
                       java.lang.String qName)
                throws org.xml.sax.SAXException

The default implementation that calls doEndElement then reduces the depth count. If this is an event for the handler's root element (depth count goes to zero), then the handlers is detached from (popped out of) the parser.

Override the doEndElement method insted of this one to process end element event. This way you will not have problems with depth counter while subclassing your event handlers.

When overriding this method always call super at the end of your code.

Specified by:

endElement in interface org.xml.sax.ContentHandler

Overrides:

endElement in class org.xml.sax.helpers.DefaultHandler

Parameters:

uri - The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed.

local - The local name (without prefix), or the empty string if Namespace processing is not being performed.

qName - The qualified name (with prefix), or the empty string if qualified names are not available.

Throws:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception

popContentHandler

protected void popContentHandler(java.lang.String uri,
                                 java.lang.String local,
                                 java.lang.String qName)
                          throws org.xml.sax.SAXException

Throws:

org.xml.sax.SAXException

Since:

MicroStrategy Web 8.0.0

doEndElement

protected abstract void doEndElement(java.lang.String uri,
                                     java.lang.String local,
                                     java.lang.String qName)
                              throws java.lang.Exception

Override this method insted of endElement to process end element event. This way you will not have problems with depth counter while subclassing your event handlers.

Throws:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception

java.lang.Exception

characters

public void characters(char[] ch,
                       int start,
                       int length)
                throws org.xml.sax.SAXException

Specified by:

characters in interface org.xml.sax.ContentHandler

Overrides:

characters in class org.xml.sax.helpers.DefaultHandler

Parameters:

ch - The characters.

start - The start position in the character array.

length - The number of characters to use from the character array.

Throws:

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

Since:

MicroStrategy Web 8.0.0

See Also:

ContentHandler.characters(char[], int, int)

endDocument

public void endDocument()
                 throws org.xml.sax.SAXException

This is a safegurd against forgetting to pop out inner handlers. It throws an exception when end document event happens for inner handlers.

Specified by:

endDocument in interface org.xml.sax.ContentHandler

Overrides:

endDocument in class org.xml.sax.helpers.DefaultHandler

Throws:

java.lang.IllegalStateException - when called for inner handler

org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

See Also:

ContentHandler.endDocument()

getIntValue

public int getIntValue()

Since:

MicroStrategy Web 9.0.0

getFloatValue

public float getFloatValue()

getText

public java.lang.String getText()

Since:

MicroStrategy Web 9.0.0

clearText

public void clearText()

Since:

MicroStrategy Web 9.0.0