Package com.singularsys.extensions.mathml.parser

Class ApplyHandler

java.lang.Object

com.singularsys.extensions.mathml.parser.AbstractHandler

com.singularsys.extensions.mathml.parser.ApplyHandler

All Implemented Interfaces:

TagHandler

public class ApplyHandler
extends AbstractHandler

Handles the <apply> container element. The first child node specifies a function or operator and the remaining child nodes are its arguments.

The default action for most operators and functions is to build an ASTOpNode/ASTFunNode from the function. Some functions require special behaviour and these should extend SpecialFunctionHandler implementing the apply method.

Author:

Richard Morris

Field Summary

Fields inherited from class com.singularsys.extensions.mathml.parser.AbstractHandler

ft, jep, nf, numf, ot, vt

Constructor Summary

Constructors

Constructor	Description
ApplyHandler(Jep jep)

Method Summary

Modifier and Type	Method	Description
Object	handle(StackFrame frame, Locator loc)	Returns a Node representing the operator or function applied to the arguments.

Methods inherited from class com.singularsys.extensions.mathml.parser.AbstractHandler

convertChildrenToNodes, convertToNode, getFt, getJep, getNf, getNumf, getOt, jepNodesAsArray, jepNodesToFlatArray, jepNodesToFlatList

Methods inherited from class java.lang.Object

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

Constructor Details

ApplyHandler

public ApplyHandler(Jep jep)

Parameters:

jep -

Method Details

handle

public Object handle(StackFrame frame,
 Locator loc)
              throws SAXParseException

Returns a Node representing the operator or function applied to the arguments. The function is the first child of the node and subsequent children are its arguments. For operators this will be an ASTOpNode, for Functions an ASTFunNode For a SpecialFunctionHandler just call its apply method.

Parameters:

frame - StackFrame representing the element

loc - location in input

Returns:

typically a Node, other types of objects may also be returned when the tag has a special meaning for its parent node.

Throws:

SAXParseException