de.odysseus.el

Class ObjectValueExpression

java.lang.Object

javax.el.Expression

javax.el.ValueExpression

de.odysseus.el.ObjectValueExpression

All Implemented Interfaces:

Serializable

public final class ObjectValueExpression
extends javax.el.ValueExpression

Object wrapper expression.

Author:

Christoph Beck

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ObjectValueExpression(TypeConverter converter, Object object, Class<?> type) Wrap an object into a value expression.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj) Two object value expressions are equal if and only if their wrapped objects are equal.
Class<?>	getExpectedType()
String	getExpressionString() Answer null.
Class<?>	getType(javax.el.ELContext context) Answer null.
Object	getValue(javax.el.ELContext context) Answer the wrapped object, coerced to the expected type.
int	hashCode()
boolean	isLiteralText() Answer false.
boolean	isReadOnly(javax.el.ELContext context) Answer true.
void	setValue(javax.el.ELContext context, Object value) Throw an exception.
String	toString()

Methods inherited from class javax.el.ValueExpression

getValueReference

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectValueExpression

public ObjectValueExpression(TypeConverter converter,
                             Object object,
                             Class<?> type)

Wrap an object into a value expression.

Parameters:

converter - type converter

object - the object to wrap

type - the expected type this object will be coerced in getValue(ELContext).

Method Detail

equals

public boolean equals(Object obj)

Two object value expressions are equal if and only if their wrapped objects are equal.

Specified by:

equals in class javax.el.Expression

hashCode

public int hashCode()

Specified by:

hashCode in class javax.el.Expression

getValue

public Object getValue(javax.el.ELContext context)

Answer the wrapped object, coerced to the expected type.

Specified by:

getValue in class javax.el.ValueExpression

getExpressionString

public String getExpressionString()

Answer null.

Specified by:

getExpressionString in class javax.el.Expression

isLiteralText

public boolean isLiteralText()

Answer false.

Specified by:

isLiteralText in class javax.el.Expression

getType

public Class<?> getType(javax.el.ELContext context)

Answer null.

Specified by:

getType in class javax.el.ValueExpression

isReadOnly

public boolean isReadOnly(javax.el.ELContext context)

Answer true.

Specified by:

isReadOnly in class javax.el.ValueExpression

setValue

public void setValue(javax.el.ELContext context,
                     Object value)

Throw an exception.

Specified by:

setValue in class javax.el.ValueExpression

toString

public String toString()

Overrides:

toString in class Object

getExpectedType

public Class<?> getExpectedType()

Specified by:

getExpectedType in class javax.el.ValueExpression