org.apache.commons.el

Class FunctionInvocation

java.lang.Object

org.apache.commons.el.Expression

org.apache.commons.el.FunctionInvocation

Direct Known Subclasses:

BoundFunctionInvocation

public class FunctionInvocation
extends Expression

Represents a function call.

Author:

Shawn Bayern (in the style of Nathan's other classes)

Constructor Summary

Constructors

Constructor and Description
FunctionInvocation(String functionName, List argumentList) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
Expression	bindFunctions(javax.servlet.jsp.el.FunctionMapper functions) Returns an expression with all FunctionInvocations replaced by BoundFunctionInvocations.
Object	evaluate(javax.servlet.jsp.el.VariableResolver pResolver, javax.servlet.jsp.el.FunctionMapper functions) Evaluates by looking up the name in the VariableResolver
List	getArgumentList()
String	getExpressionString() Returns the expression in the expression language syntax
String	getFunctionName()
protected Method	resolveFunction(javax.servlet.jsp.el.FunctionMapper functions) Returns the Method which is mapped to the function name used by this FunctionInvocation.
void	setArgumentList(List l)
void	setFunctionName(String f)

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionInvocation

public FunctionInvocation(String functionName,
                  List argumentList)

Constructor

Method Detail

getFunctionName

public String getFunctionName()

setFunctionName

public void setFunctionName(String f)

getArgumentList

public List getArgumentList()

setArgumentList

public void setArgumentList(List l)

getExpressionString

public String getExpressionString()

Returns the expression in the expression language syntax

Specified by:

getExpressionString in class Expression

evaluate

public Object evaluate(javax.servlet.jsp.el.VariableResolver pResolver,
              javax.servlet.jsp.el.FunctionMapper functions)
                throws javax.servlet.jsp.el.ELException

Evaluates by looking up the name in the VariableResolver

Specified by:

evaluate in class Expression

Throws:

javax.servlet.jsp.el.ELException

resolveFunction

protected Method resolveFunction(javax.servlet.jsp.el.FunctionMapper functions)
                          throws javax.servlet.jsp.el.ELException

Returns the Method which is mapped to the function name used by this FunctionInvocation.

Parameters:

functions - The function mappings in use for this evaluation

Returns:

the Method to execute

Throws:

javax.servlet.jsp.el.ELException

bindFunctions

public Expression bindFunctions(javax.servlet.jsp.el.FunctionMapper functions)
                         throws javax.servlet.jsp.el.ELException

Description copied from class: Expression

Returns an expression with all FunctionInvocations replaced by BoundFunctionInvocations.

Specified by:

bindFunctions in class Expression

Parameters:

functions - the functions to use in this transformation

Returns:

an Expression identical to this expression except with all FunctionInvocations replaced by BoundFunctionInvocations.

Throws:

javax.servlet.jsp.el.ELException - if any of the functions in this Expression are not present in functions