org.apache.cocoon.forms.expression
Class DefaultExpressionManager

java.lang.Object
  org.apache.cocoon.forms.expression.DefaultExpressionManager

All Implemented Interfaces:

Component, Configurable, ThreadSafe, ExpressionManager

public class DefaultExpressionManager
extends Object
implements ExpressionManager, Component, Configurable, ThreadSafe

Implementation of the ExpressionManager role. Custom functions can be added using configuration elements:

   <function name="MyFunction" class="net.foo.MyFunction"/>
 

Version:

$Id: DefaultExpressionManager.html 1304258 2012-03-23 10:09:27Z ilgrosso $

Field Summary

Fields inherited from interface org.apache.cocoon.forms.expression.ExpressionManager

ROLE

Constructor Summary

DefaultExpressionManager()

Method Summary

void	configure(Configuration config)
org.outerj.expression.Expression	parse(String expressionString) Parse the given expression.
List	parseVariables(String expressionString) Parse the given expression to extract variables.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultExpressionManager

public DefaultExpressionManager()

Method Detail

configure

public void configure(Configuration config)
               throws ConfigurationException

Specified by:

configure in interface Configurable

Throws:

ConfigurationException

parse

public org.outerj.expression.Expression parse(String expressionString)
                                       throws org.outerj.expression.ParseException,
                                              org.outerj.expression.ExpressionException

Description copied from interface: ExpressionManager

Parse the given expression.

Specified by:

parse in interface ExpressionManager

Parameters:

expressionString - The string containing the expression to parse.

Returns:

The Expression object resulting from parse.

Throws:

org.outerj.expression.ParseException - If something goes wrong while parsing.

org.outerj.expression.ExpressionException - If the expression has been parsed successfully but is invalid.

parseVariables

public List parseVariables(String expressionString)
                    throws org.outerj.expression.ParseException,
                           org.outerj.expression.ExpressionException

Description copied from interface: ExpressionManager

Parse the given expression to extract variables.

Specified by:

parseVariables in interface ExpressionManager

Parameters:

expressionString - The string containing the expression to parse.

Returns:

A List of VariableFunction, one for each variable used in the expression.

Throws:

org.outerj.expression.ParseException - If something goes wrong while parsing.

org.outerj.expression.ExpressionException - If the expression has been parsed successfully but is invalid.

See Also:

VariableFunction.getVariableName()