org.jboss.weld.el

Class WeldValueExpression

java.lang.Object

javax.el.Expression

javax.el.ValueExpression

org.jboss.weld.util.el.ForwardingValueExpression

org.jboss.weld.el.WeldValueExpression

All Implemented Interfaces:

Serializable

public class WeldValueExpression
extends ForwardingValueExpression

Author:

pmuir, alesj

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
WeldValueExpression(ValueExpression delegate)

Method Summary

Methods

Modifier and Type	Method and Description
protected ValueExpression	delegate()
Class	getType(ELContext context) Evaluates the expression relative to the provided context, and returns the most general type that is acceptable for an object to be passed as the value parameter in a future call to the ValueExpression.setValue(javax.el.ELContext, java.lang.Object) method.
Object	getValue(ELContext context) Evaluates the expression relative to the provided context, and returns the resulting value.
boolean	isReadOnly(ELContext context) Evaluates the expression relative to the provided context, and returns true if a call to ValueExpression.setValue(javax.el.ELContext, java.lang.Object) will always fail.
void	setValue(ELContext context, Object value) Evaluates the expression relative to the provided context, and sets the result to the provided value.

Methods inherited from class org.jboss.weld.util.el.ForwardingValueExpression

equals, getExpectedType, getExpressionString, getValueReference, hashCode, isLiteralText, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

WeldValueExpression

public WeldValueExpression(ValueExpression delegate)

Method Detail

delegate

protected ValueExpression delegate()

Specified by:

delegate in class ForwardingValueExpression

getValue

public Object getValue(ELContext context)

Description copied from class: ValueExpression

Evaluates the expression relative to the provided context, and returns the resulting value.

The resulting value is automatically coerced to the type returned by getExpectedType(), which was provided to the ExpressionFactory when this expression was created.

Overrides:

getValue in class ForwardingValueExpression

Parameters:

context - The context of this evaluation.

Returns:

The result of the expression evaluation.

setValue

public void setValue(ELContext context,
            Object value)

Description copied from class: ValueExpression

Evaluates the expression relative to the provided context, and sets the result to the provided value.

Overrides:

setValue in class ForwardingValueExpression

Parameters:

context - The context of this evaluation.

value - The new value to be set.

isReadOnly

public boolean isReadOnly(ELContext context)

Description copied from class: ValueExpression

Evaluates the expression relative to the provided context, and returns true if a call to ValueExpression.setValue(javax.el.ELContext, java.lang.Object) will always fail.

Overrides:

isReadOnly in class ForwardingValueExpression

Parameters:

context - The context of this evaluation.

Returns:

true if the expression is read-only or false if not.

getType

public Class getType(ELContext context)

Description copied from class: ValueExpression

Evaluates the expression relative to the provided context, and returns the most general type that is acceptable for an object to be passed as the value parameter in a future call to the ValueExpression.setValue(javax.el.ELContext, java.lang.Object) method.

This is not always the same as getValue().getClass(). For example, in the case of an expression that references an array element, the getType method will return the element type of the array, which might be a superclass of the type of the actual element that is currently in the specified array element.

Overrides:

getType in class ForwardingValueExpression

Parameters:

context - The context of this evaluation.

Returns:

the most general acceptable type; otherwise undefined.