org.apache.commons.betwixt.expression

Class DynaBeanExpression

java.lang.Object

org.apache.commons.betwixt.expression.DynaBeanExpression

All Implemented Interfaces:

Expression

public class DynaBeanExpression
extends Object
implements Expression

An Expression that gets a property value from a DynaBean.

Since:

0.5

Author:

Michael Becke

See Also:

DynaBean

Constructor Summary

Constructors

Constructor and Description
DynaBeanExpression() Crates a new DynaBeanExpression.
DynaBeanExpression(String propertyName) Crates a new DynaBeanExpression.

Method Summary

Methods

Modifier and Type	Method and Description
Object	evaluate(Context context) Returns the value of a DynaBean property from the bean stored in the Context.
String	getPropertyName() Gets the name of the property to get from the DynaBean.
void	setPropertyName(String propertyName) Sets the name of the property to get from the DynaBean.
void	update(Context context, String newValue) Do nothing.

Methods inherited from class java.lang.Object

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

Constructor Detail

DynaBeanExpression

public DynaBeanExpression()

Crates a new DynaBeanExpression.

DynaBeanExpression

public DynaBeanExpression(String propertyName)

Crates a new DynaBeanExpression.

Parameters:

propertyName - the name of the DynaBean property to use

Method Detail

evaluate

public Object evaluate(Context context)

Returns the value of a DynaBean property from the bean stored in the Context. Returns null if no DynaBean is stored in the Context or if the propertyName has not been set.

Specified by:

evaluate in interface Expression

Parameters:

context - the content containing the DynaBean

Returns:

the DynaBean property value or null

update

public void update(Context context,
          String newValue)

Do nothing.

Specified by:

update in interface Expression

Parameters:

context - update this Context

newValue - the new value for this expression

See Also:

Expression.update(org.apache.commons.betwixt.expression.Context, java.lang.String)

getPropertyName

public String getPropertyName()

Gets the name of the property to get from the DynaBean.

Returns:

the name of the property that this expression reads

setPropertyName

public void setPropertyName(String propertyName)

Sets the name of the property to get from the DynaBean.

Parameters:

propertyName - the property that this expression reads, not null