org.springframework.webflow.engine.support
Class AttributeExpression

java.lang.Object
  org.springframework.webflow.engine.support.AttributeExpression

All Implemented Interfaces:

org.springframework.binding.expression.Expression, org.springframework.binding.expression.SettableExpression

public class AttributeExpression
extends java.lang.Object
implements org.springframework.binding.expression.SettableExpression

Expression evaluator that can evalute attribute maps and supported request context scope types.

Author:

Keith Donald, Erwin Vervaet

See Also:

RequestContext, AttributeMap

Constructor Summary

AttributeExpression(org.springframework.binding.expression.Expression expression)
Create a new expression evaluator that executes given expression in an attribute map.

AttributeExpression(org.springframework.binding.expression.Expression expression, ScopeType scopeType)
Create a new expression evaluator that executes given expression in the specified scope.

Method Summary

java.lang.Object	evaluate(java.lang.Object target, org.springframework.binding.expression.EvaluationContext context)
void	evaluateToSet(java.lang.Object target, java.lang.Object value, org.springframework.binding.expression.EvaluationContext context)
protected org.springframework.binding.expression.Expression	getExpression() Returns the expression that will be evaluated.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

AttributeExpression

public AttributeExpression(org.springframework.binding.expression.Expression expression)

Create a new expression evaluator that executes given expression in an attribute map. When using this wrapper to set a property value, make sure the given expression is a SettableExpression}.

Parameters:

expression - the nested evaluator to execute

AttributeExpression

public AttributeExpression(org.springframework.binding.expression.Expression expression,
                           ScopeType scopeType)

Create a new expression evaluator that executes given expression in the specified scope. When using this wrapper to set a property value, make sure the given expression is a SettableExpression}.

Parameters:

expression - the nested evaluator to execute

scopeType - the scopeType

Method Detail

getExpression

protected org.springframework.binding.expression.Expression getExpression()

Returns the expression that will be evaluated.

evaluate

public java.lang.Object evaluate(java.lang.Object target,
                                 org.springframework.binding.expression.EvaluationContext context)
                          throws org.springframework.binding.expression.EvaluationException

Specified by:

evaluate in interface org.springframework.binding.expression.Expression

Throws:

org.springframework.binding.expression.EvaluationException

evaluateToSet

public void evaluateToSet(java.lang.Object target,
                          java.lang.Object value,
                          org.springframework.binding.expression.EvaluationContext context)
                   throws org.springframework.binding.expression.EvaluationException

Specified by:

evaluateToSet in interface org.springframework.binding.expression.SettableExpression

Throws:

org.springframework.binding.expression.EvaluationException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object