TriStateBoolean (Oracle Fusion Middleware Java API Reference for Oracle Extension SDK)

java.lang.Object
- oracle.ide.util.TriStateBoolean

```
public class TriStateBoolean
extends java.lang.Object
```
This class represents a flag that has three states, as opposed to the two states of a regular boolean flag. Support for basic Boolean operations (NOT, AND, and OR) are provided.

Field Summary

Fields
Modifier and Type	Field and Description
`static TriStateBoolean`	`FALSE` `FALSE` corresponds to a typical Boolean `FALSE`.
`static TriStateBoolean`	`TRI_STATE` `TRI_STATE` represents the tri-state.
`static TriStateBoolean`	`TRUE` `TRUE` corresponds to a typical Boolean `true`.
`static TriStateBoolean`	`UNDEF` Special `TriStateBoolean` object representing an uninitialized value.

Method Summary

Modifier and Type Method and Description

TriStateBoolean

aggregate(TriStateBoolean b)

This method is used to help determine if a set of TriStateBoolean values are all the same or have some difference.

TriStateBoolean

and(TriStateBoolean b)

Truth table for tri-state AND operator AND true false tri true true false tri false false false tri tri tri tri tri

boolean

booleanValue()

Returns true if this instance represents TRUE.

static TriStateBoolean getState(boolean state)

static TriStateBoolean getState(java.lang.Boolean state)

boolean

isFalse()

Returns true if this instance represents FALSE; returns false otherwise.

boolean

isTriState()

Returns true if this instance represents TRI_STATE; returns false otherwise.

boolean

isTrue()

Returns true if this instance represents TRUE; returns false otherwise.

boolean

isUndef()

Returns true if this instance represents UNDEF; returns false otherwise.

TriStateBoolean

not()

NOT true => false.
NOT false => true.
NOT tri => tri.

TriStateBoolean

or(TriStateBoolean b)

Truth table for tri-state OR operator OR true false tri true true true tri false true false tri tri tri tri tri

TriStateBoolean

toggle()

This method defines the "toggle" operation as follows: Toggling TRUE returns FALSE.

java.lang.String toString()

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - TRUE
```
public static final TriStateBoolean TRUE
```
    TRUE corresponds to a typical Boolean true.
  - TRI_STATE
```
public static final TriStateBoolean TRI_STATE
```
    TRI_STATE represents the tri-state.
  - FALSE
```
public static final TriStateBoolean FALSE
```
    FALSE corresponds to a typical Boolean FALSE.
  - UNDEF
```
public static final TriStateBoolean UNDEF
```
    Special TriStateBoolean object representing an uninitialized value. This is needed to support the aggregate() operation. Using the UNDEF value is analogous to saying "no value". When UNDEF is used in a TriStateBoolean operation, it is essentially ignored, the result of the operation is determined by the other operand. If both operands are UNDEF then UNDEF is returned.
- Method Detail
  - getState
```
public static TriStateBoolean getState(boolean state)
```
  - getState
```
public static TriStateBoolean getState(java.lang.Boolean state)
```
  - isTrue
```
public boolean isTrue()
```
    Returns true if this instance represents TRUE; returns false otherwise.
  - isTriState
```
public boolean isTriState()
```
    Returns true if this instance represents TRI_STATE; returns false otherwise.
  - isFalse
```
public boolean isFalse()
```
    Returns true if this instance represents FALSE; returns false otherwise.
  - isUndef
```
public boolean isUndef()
```
    Returns true if this instance represents UNDEF; returns false otherwise.
  - booleanValue
```
public boolean booleanValue()
```
    Returns true if this instance represents TRUE. Returns false if this instance represents false. Throws an IllegalStateException if this instance represents TRI_STATE.
  - toggle
```
public TriStateBoolean toggle()
```
    This method defines the "toggle" operation as follows:
    - Toggling TRUE returns FALSE.
    - Toggling TRI_STATE returns FALSE.
    - Toggling FALSE returns TRUE.
  - aggregate
```
public TriStateBoolean aggregate(TriStateBoolean b)
```
    This method is used to help determine if a set of TriStateBoolean values are all the same or have some difference. It implements the following unusual truth table:
    Truth table for tri-state AND operator
    AGG true false tri
    
    true true tri tri
    
    false tri false tri
    
    tri tri tri tri
  - and
```
public TriStateBoolean and(TriStateBoolean b)
```
    Truth table for tri-state AND operator
    AND true false tri
    
    true true false tri
    
    false false false tri
    
    tri tri tri tri
  - or
```
public TriStateBoolean or(TriStateBoolean b)
```
    Truth table for tri-state OR operator
    OR true false tri
    
    true true true tri
    
    false true false tri
    
    tri tri tri tri
  - not
```
public TriStateBoolean not()
```
    NOT true => false.
    NOT false => true.
    NOT tri => tri.
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object

AND	true	false	tri
true	true	false	tri
false	false	false	tri
tri	tri	tri	tri

Class TriStateBoolean

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

TRUE

TRI_STATE

FALSE

UNDEF

Method Detail

getState

getState

isTrue

isTriState

isFalse

isUndef

booleanValue

toggle

aggregate

and

or

not

toString