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java.lang.Objectjavax.el.Expression
javax.el.ValueExpression
javax.servlet.jsp.jstl.core.IndexedValueExpression
public final class IndexedValueExpression
| Field Summary | |
|---|---|
protected Integer |
i
|
protected ValueExpression |
orig
|
| Constructor Summary | |
|---|---|
IndexedValueExpression(ValueExpression orig,
int i)
|
|
| Method Summary | |
|---|---|
boolean |
equals(Object obj)
Determines whether the specified object is equal to this Expression. |
Class |
getExpectedType()
Returns the type the result of the expression will be coerced to after evaluation. |
String |
getExpressionString()
Returns the original String used to create this Expression,
unmodified. |
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. |
int |
hashCode()
Returns the hash code for this Expression. |
boolean |
isLiteralText()
Returns whether this expression was created from only literal text. |
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 java.lang.Object |
|---|
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
protected final Integer i
protected final ValueExpression orig
| Constructor Detail |
|---|
public IndexedValueExpression(ValueExpression orig,
int i)
| Method Detail |
|---|
public Object getValue(ELContext context)
ValueExpressionThe resulting value is automatically coerced to the type
returned by getExpectedType(), which was
provided to the ExpressionFactory when this
expression was created.
getValue in class ValueExpressioncontext - The context of this evaluation.
public void setValue(ELContext context,
Object value)
ValueExpression
setValue in class ValueExpressioncontext - The context of this evaluation.value - The new value to be set.public boolean isReadOnly(ELContext context)
ValueExpressiontrue if a call to ValueExpression.setValue(javax.el.ELContext, java.lang.Object) will
always fail.
isReadOnly in class ValueExpressioncontext - The context of this evaluation.
true if the expression is read-only or
false if not.public Class getType(ELContext context)
ValueExpressionvalue 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.
getType in class ValueExpressioncontext - The context of this evaluation.
public Class getExpectedType()
ValueExpression
getExpectedType in class ValueExpressionexpectedType passed to the
ExpressionFactory.createValueExpression method
that created this ValueExpression.public String getExpressionString()
ExpressionExpression,
unmodified.
This is used for debugging purposes but also for the purposes of comparison (e.g. to ensure the expression in a configuration file has not changed).
This method does not provide sufficient information to
re-create an expression. Two different expressions can have exactly
the same expression string but different function mappings.
Serialization should be used to save and restore the state of an
Expression.
getExpressionString in class Expressionpublic boolean equals(Object obj)
ExpressionExpression.
The result is true if and only if the argument is
not null, is an Expression object that
is the of the same type (ValueExpression or
MethodExpression), and has an identical parsed
representation.
Note that two expressions can be equal if their expression
Strings are different. For example, ${fn1:foo()}
and ${fn2:foo()} are equal if their corresponding
FunctionMappers mapped fn1:foo and
fn2:foo to the same method.
equals in class Expressionobj - the Object to test for equality.
true if obj equals this
Expression; false otherwise.Hashtable,
Object.equals(java.lang.Object)public int hashCode()
ExpressionExpression.
See the note in the Expression.equals(java.lang.Object) method on how two expressions
can be equal if their expression Strings are different. Recall that
if two objects are equal according to the equals(Object)
method, then calling the hashCode method on each of the
two objects must produce the same integer result. Implementations must
take special note and implement hashCode correctly.
hashCode in class ExpressionExpression.Expression.equals(java.lang.Object),
Hashtable,
Object.hashCode()public boolean isLiteralText()
ExpressionThis method must return true if and only if the
expression string this expression was created from contained no
unescaped EL delimeters (${...} or
#{...}).
isLiteralText in class Expressiontrue if this expression was created from only
literal text; false otherwise.
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Copyright 2006 Sun Microsystems, Inc. All rights reserved.