Class ValueExpressionLiteral

java.lang.Object

javax.el.Expression

javax.el.ValueExpression

org.apache.el.ValueExpressionLiteral

All Implemented Interfaces:

Externalizable, Serializable

public final class ValueExpressionLiteral
extends ValueExpression
implements Externalizable

A literal value expression that represents a constant value.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ValueExpressionLiteral()	Constructs a new ValueExpressionLiteral for deserialization.
ValueExpressionLiteral(Object value, Class<?> expectedType)	Constructs a new ValueExpressionLiteral.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
boolean	equals(ValueExpressionLiteral ve)	Compares this literal value expression with another for equality.
Class<?>	getExpectedType()
String	getExpressionString()
Class<?>	getType(ELContext context)
Object	getValue(ELContext context)
int	hashCode()
boolean	isLiteralText()
boolean	isReadOnly(ELContext context)
void	readExternal(ObjectInput in)
void	setValue(ELContext context, Object value)
void	writeExternal(ObjectOutput out)

Methods inherited from class ValueExpression

getValueReference

Methods inherited from class Object

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

Constructor Details

ValueExpressionLiteral

public ValueExpressionLiteral()

Constructs a new ValueExpressionLiteral for deserialization.

ValueExpressionLiteral

public ValueExpressionLiteral(Object value,
 Class<?> expectedType)

Constructs a new ValueExpressionLiteral.

Parameters:

value - The literal value

expectedType - The expected return type

Method Details

getValue

public Object getValue(ELContext context)

Specified by:

getValue in class ValueExpression

Parameters:

context - The EL context for this evaluation

Returns:

The result of evaluating this value expression

setValue

public void setValue(ELContext context,
 Object value)

Specified by:

setValue in class ValueExpression

Parameters:

context - The EL context for this evaluation

value - The value to set the property to which this value expression refers

isReadOnly

public boolean isReadOnly(ELContext context)

Specified by:

isReadOnly in class ValueExpression

Parameters:

context - The EL context for this evaluation

Returns:

true if this expression is read only otherwise false

getType

public Class<?> getType(ELContext context)

Specified by:

getType in class ValueExpression

Parameters:

context - The EL context for this evaluation

Returns:

The type of the result of this value expression

getExpectedType

public Class<?> getExpectedType()

Specified by:

getExpectedType in class ValueExpression

getExpressionString

public String getExpressionString()

Specified by:

getExpressionString in class Expression

equals

public boolean equals(Object obj)

Specified by:

equals in class Expression

equals

public boolean equals(ValueExpressionLiteral ve)

Compares this literal value expression with another for equality.

Parameters:

ve - The other literal value expression

Returns:

true if the values are equal, false otherwise

hashCode

public int hashCode()

Specified by:

hashCode in class Expression

isLiteralText

public boolean isLiteralText()

Specified by:

isLiteralText in class Expression

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException