public final class ObjectValueExpression extends ValueExpression
Constructor and Description |
---|
ObjectValueExpression(java.lang.Object object,
java.lang.Class<?> type)
Wrap an object into a value expression.
|
Modifier and Type | Method and Description |
---|---|
boolean |
equals(java.lang.Object obj)
Two object value expressions are equal if and only if their wrapped objects are equal.
|
java.lang.Class<?> |
getExpectedType()
Returns the type the result of the expression will be coerced to
after evaluation.
|
java.lang.String |
getExpressionString()
Answer
null . |
java.lang.Class<?> |
getType(ELContext context)
Answer
null . |
java.lang.Object |
getValue(ELContext context)
Answer the wrapped object, coerced to the expected type.
|
int |
hashCode()
Returns the hash code for this
Expression . |
boolean |
isLiteralText()
Answer
false . |
boolean |
isReadOnly(ELContext context)
Answer
true . |
void |
setValue(ELContext context,
java.lang.Object value)
Throw an exception.
|
java.lang.String |
toString() |
public ObjectValueExpression(java.lang.Object object, java.lang.Class<?> type)
object
- the object to wraptype
- the expected type this object will be coerced in getValue(ELContext)
.public boolean equals(java.lang.Object obj)
equals
in class Expression
obj
- the Object
to test for equality.true
if obj
equals this
Expression
; false
otherwise.Hashtable
,
Object.equals(java.lang.Object)
public int hashCode()
Expression
Expression
.
See the note in the Expression.equals(java.lang.Object)
method on how two expressions
can be equal if their expression Strings are different. Recall that
if two objects are equal according to the equals(Object)
method, then calling the hashCode
method on each of the
two objects must produce the same integer result. Implementations must
take special note and implement hashCode
correctly.
hashCode
in class Expression
Expression
.Expression.equals(java.lang.Object)
,
Hashtable
,
Object.hashCode()
public java.lang.Object getValue(ELContext context)
getValue
in class ValueExpression
context
- The context of this evaluation.public java.lang.String getExpressionString()
null
.getExpressionString
in class Expression
public boolean isLiteralText()
false
.isLiteralText
in class Expression
true
if this expression was created from only
literal text; false
otherwise.public java.lang.Class<?> getType(ELContext context)
null
.getType
in class ValueExpression
context
- The context of this evaluation.public boolean isReadOnly(ELContext context)
true
.isReadOnly
in class ValueExpression
context
- The context of this evaluation.true
if the expression is read-only or
false
if not.public void setValue(ELContext context, java.lang.Object value)
setValue
in class ValueExpression
context
- The context of this evaluation.value
- The new value to be set.public java.lang.String toString()
toString
in class java.lang.Object
public java.lang.Class<?> getExpectedType()
ValueExpression
getExpectedType
in class ValueExpression
expectedType
passed to the
ExpressionFactory.createValueExpression
method
that created this ValueExpression
.