Package org.apache.tools.ant.helper

Class ProjectHelper2.AntHandler

java.lang.Object

org.apache.tools.ant.helper.ProjectHelper2.AntHandler

Direct Known Subclasses:

ProjectHelper2.ElementHandler, ProjectHelper2.MainHandler, ProjectHelper2.ProjectHandler, ProjectHelper2.TargetHandler

Enclosing class:

ProjectHelper2

public static class ProjectHelper2.AntHandler
extends Object

The common superclass for all SAX event handlers used to parse the configuration file. The context will hold all state information. At each time there is one active handler for the current element. It can use onStartChild() to set an alternate handler for the child.

Constructor Summary

Constructors

Constructor	Description
AntHandler()

Method Summary

Modifier and Type	Method	Description
void	characters(char[] buf, int start, int count, AntXMLContext context)	Handles text within an element.
protected void	checkNamespace(String uri)	Will be called every time a namespace is reached.
void	onEndChild(String uri, String tag, String qname, AntXMLContext context)	Handle the end of a element.
void	onEndElement(String uri, String tag, AntXMLContext context)	This method is called when this element and all elements nested into it have been handled.
ProjectHelper2.AntHandler	onStartChild(String uri, String tag, String qname, Attributes attrs, AntXMLContext context)	Handles the start of an element.
void	onStartElement(String uri, String tag, String qname, Attributes attrs, AntXMLContext context)	Handles the start of an element.

Methods inherited from class java.lang.Object

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

Constructor Details

AntHandler

public AntHandler()

Method Details

onStartElement

public void onStartElement(String uri,
 String tag,
 String qname,
 Attributes attrs,
 AntXMLContext context)
                    throws SAXParseException

Handles the start of an element. This base implementation does nothing.

Parameters:

uri - the namespace URI for the tag

tag - The name of the element being started. Will not be null.

qname - The qualified name of the element.

attrs - Attributes of the element being started. Will not be null.

context - The context that this element is in.

Throws:

SAXParseException - if this method is not overridden, or in case of error in an overridden version

onStartChild

public ProjectHelper2.AntHandler onStartChild(String uri,
 String tag,
 String qname,
 Attributes attrs,
 AntXMLContext context)
                                       throws SAXParseException

Handles the start of an element. This base implementation just throws an exception - you must override this method if you expect child elements.

Parameters:

uri - The namespace uri for this element.

tag - The name of the element being started. Will not be null.

qname - The qualified name for this element.

attrs - Attributes of the element being started. Will not be null.

context - The current context.

Returns:

a handler (in the derived classes)

Throws:

SAXParseException - if this method is not overridden, or in case of error in an overridden version

onEndChild

public void onEndChild(String uri,
 String tag,
 String qname,
 AntXMLContext context)
                throws SAXParseException

Handle the end of a element.

Parameters:

uri - the namespace uri of the element

tag - the tag of the element

qname - the qualified name of the element

context - the current context

Throws:

SAXParseException - if an error occurs

onEndElement

public void onEndElement(String uri,
 String tag,
 AntXMLContext context)

This method is called when this element and all elements nested into it have been handled. I.e., this happens at the </end_tag_of_the_element>.

Parameters:

uri - the namespace uri for this element

tag - the element name

context - the current context

characters

public void characters(char[] buf,
 int start,
 int count,
 AntXMLContext context)
                throws SAXParseException

Handles text within an element. This base implementation just throws an exception, you must override it if you expect content.

Parameters:

buf - A character array of the text within the element. Will not be null.

start - The start element in the array.

count - The number of characters to read from the array.

context - The current context.

Throws:

SAXParseException - if this method is not overridden, or in case of error in an overridden version

checkNamespace

protected void checkNamespace(String uri)

Will be called every time a namespace is reached. It'll verify if the ns was processed, and if not load the task definitions.

Parameters:

uri - The namespace uri.