Class ObjectExpression<T>
java.lang.Object
javafx.beans.binding.ObjectExpression<T>
- Type Parameters:
T
- the type of expression value
- All Implemented Interfaces:
Observable
,ObservableObjectValue<T>
,ObservableValue<T>
- Direct Known Subclasses:
ObjectBinding
,ReadOnlyObjectProperty
ObjectExpression
is an
ObservableObjectValue
plus additional convenience
methods to generate bindings in a fluent style.
A concrete sub-class of ObjectExpression
has to implement the method
ObservableObjectValue.get()
, which provides the
actual value of this expression.
- Since:
- JavaFX 2.0
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionasString()
getValue()
Returns the current value of thisObservableValue
Creates a newBooleanExpression
that holdstrue
if thisObjectExpression
is equal to a constant value.isEqualTo
(ObservableObjectValue<?> other) Creates a newBooleanExpression
that holdstrue
if this and anotherObservableObjectValue
are equal.isNotEqualTo
(Object other) Creates a newBooleanExpression
that holdstrue
if thisObjectExpression
is not equal to a constant value.isNotEqualTo
(ObservableObjectValue<?> other) Creates a newBooleanExpression
that holdstrue
if this and anotherObservableObjectValue
are not equal.isNull()
static <T> ObjectExpression
<T> objectExpression
(ObservableObjectValue<T> value) Returns anObjectExpression
that wraps anObservableObjectValue
.Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods declared in interface javafx.beans.Observable
addListener, removeListener, subscribe
Methods declared in interface javafx.beans.value.ObservableObjectValue
get
Methods declared in interface javafx.beans.value.ObservableValue
addListener, flatMap, map, orElse, removeListener, subscribe, subscribe, when
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Constructor Details
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ObjectExpression
public ObjectExpression()Creates a defaultObjectExpression
.
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Method Details
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getValue
Description copied from interface:ObservableValue
Returns the current value of thisObservableValue
- Specified by:
getValue
in interfaceObservableValue<T>
- Returns:
- The current value
-
objectExpression
Returns anObjectExpression
that wraps anObservableObjectValue
. If theObservableObjectValue
is already anObjectExpression
, it will be returned. Otherwise a newObjectBinding
is created that is bound to theObservableObjectValue
.- Type Parameters:
T
- the type of the wrappedObject
- Parameters:
value
- The sourceObservableObjectValue
- Returns:
- A
ObjectExpression
that wraps theObservableObjectValue
if necessary - Throws:
NullPointerException
- ifvalue
isnull
-
isEqualTo
Creates a newBooleanExpression
that holdstrue
if this and anotherObservableObjectValue
are equal.- Parameters:
other
- the otherObservableObjectValue
- Returns:
- the new
BooleanExpression
- Throws:
NullPointerException
- ifother
isnull
-
isEqualTo
Creates a newBooleanExpression
that holdstrue
if thisObjectExpression
is equal to a constant value.- Parameters:
other
- the constant value- Returns:
- the new
BooleanExpression
-
isNotEqualTo
Creates a newBooleanExpression
that holdstrue
if this and anotherObservableObjectValue
are not equal.- Parameters:
other
- the otherObservableObjectValue
- Returns:
- the new
BooleanExpression
- Throws:
NullPointerException
- ifother
isnull
-
isNotEqualTo
Creates a newBooleanExpression
that holdstrue
if thisObjectExpression
is not equal to a constant value.- Parameters:
other
- the constant value- Returns:
- the new
BooleanExpression
-
isNull
- Returns:
- the new
BooleanBinding
-
isNotNull
- Returns:
- the new
BooleanBinding
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asString
Creates aStringBinding
that holds the value of thisObjectExpression
turned into aString
. If the value of thisObjectExpression
changes, the value of theStringBinding
will be updated automatically.- Returns:
- the new
StringBinding
- Since:
- JavaFX 8.0
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asString
Creates aStringBinding
that holds the value of theObjectExpression
turned into aString
. If the value of thisObjectExpression
changes, the value of theStringBinding
will be updated automatically.The result is formatted according to the formatting
String
. Seejava.util.Formatter
for formatting rules.- Parameters:
format
- the formattingString
- Returns:
- the new
StringBinding
- Since:
- JavaFX 8.0
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asString
Creates aStringBinding
that holds the value of theNumberExpression
turned into aString
. If the value of thisNumberExpression
changes, the value of theStringBinding
will be updated automatically.The result is formatted according to the formatting
String
and the passed inLocale
. Seejava.util.Formatter
for formatting rules. Seejava.util.Locale
for details onLocale
.- Parameters:
locale
- the Locale to be usedformat
- the formattingString
- Returns:
- the new
StringBinding
- Since:
- JavaFX 8.0
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