org.springframework.binding.expression.support

Class CollectionAddingExpression

java.lang.Object

org.springframework.binding.expression.support.CollectionAddingExpression

All Implemented Interfaces:

Expression

public class CollectionAddingExpression
extends Object
implements Expression

A settable expression that adds non-null values to a collection.

Author:

Keith Donald

Constructor Summary

Constructors

Constructor and Description
CollectionAddingExpression(Expression collectionExpression) Creates a collection adding property expression.

Method Summary

Methods

Modifier and Type	Method and Description
String	getExpressionString() Returns the original string used to create this expression, unmodified.
Object	getValue(Object context) Evaluate this expression in the provided context and return the result of evaluation.
Class	getValueType(Object context) Returns the most general type that can be passed to the Expression.setValue(Object, Object) method for the given context.
void	setValue(Object context, Object value) Set this expression in the provided context to the value provided.
String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CollectionAddingExpression

public CollectionAddingExpression(Expression collectionExpression)

Creates a collection adding property expression.

Parameters:

collectionExpression - the collection expression

Method Detail

getValue

public Object getValue(Object context)
                throws EvaluationException

Description copied from interface: Expression

Evaluate this expression in the provided context and return the result of evaluation.

Specified by:

getValue in interface Expression

Parameters:

context - the context to evaluate this expression in

Returns:

the evaluation result

Throws:

EvaluationException - an exception occurred during expression evaluation

setValue

public void setValue(Object context,
            Object value)
              throws EvaluationException

Description copied from interface: Expression

Set this expression in the provided context to the value provided.

Specified by:

setValue in interface Expression

Parameters:

context - the context on which the new value should be set

value - the new value to set

Throws:

EvaluationException - an exception occurred during expression evaluation

getValueType

public Class getValueType(Object context)

Description copied from interface: Expression

Returns the most general type that can be passed to the Expression.setValue(Object, Object) method for the given context.

Specified by:

getValueType in interface Expression

Parameters:

context - the context to evaluate

Returns:

the most general type of value that can be set on this context, or null if the type information cannot be determined

getExpressionString

public String getExpressionString()

Description copied from interface: Expression

Returns the original string used to create this expression, unmodified.

Specified by:

getExpressionString in interface Expression

Returns:

the original expression string

toString

public String toString()

Overrides:

toString in class Object