org.apache.commons.el
Class ExpressionString

java.lang.Object
  org.apache.commons.el.Expression
      org.apache.commons.el.ExpressionString

public class ExpressionString
extends Expression

Represents an expression String consisting of a mixture of Strings and Expressions.

Version:

$Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: bayard $

Author:

Nathan Abramson - Art Technology Group, Shawn Bayern

Constructor Summary

ExpressionString(Object[] pElements)
Constructor

Method Summary

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 the expression string by evaluating each element, converting it to a String (using toString, or "" for null values) and concatenating the results into a single String.
Object[]	getElements()
String	getExpressionString() Returns the expression in the expression language syntax
void	setElements(Object[] pElements)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionString

public ExpressionString(Object[] pElements)

Constructor

Method Detail

getElements

public Object[] getElements()

setElements

public void setElements(Object[] pElements)

evaluate

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

Evaluates the expression string by evaluating each element, converting it to a String (using toString, or "" for null values) and concatenating the results into a single String.

Specified by:

evaluate in class Expression

Throws:

javax.servlet.jsp.el.ELException

getExpressionString

public String getExpressionString()

Returns the expression in the expression language syntax

Specified by:

getExpressionString in class Expression

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