com.pervasive.datarush.tokens.scalar

Class BooleanToken

java.lang.Object

com.pervasive.datarush.tokens.scalar.BooleanToken

All Implemented Interfaces:

DataToken, BooleanValued, ScalarToken, ScalarValued, TokenValued, ScalarTyped, TokenTyped, Serializable, Comparable<BooleanToken>

public final class BooleanToken
extends Object
implements ScalarToken, Comparable<BooleanToken>

An immutable BooleanValued object.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static BooleanToken	FALSE A BooleanToken with a value of false
static BooleanToken	NULL A null valued BooleanToken
static BooleanToken	TRUE A BooleanToken with a value of true
static BooleanToken	ZERO A zero valued BooleanToken
static boolean	ZERO_VALUE The boolean representing a zero value, false.

Constructor Summary

Constructors

Constructor and Description
BooleanToken(boolean value) Constructs a new token with the given non-null boolean value.
BooleanToken(BooleanValued value) Constructs a new token with the boolean value in the given container.

Method Summary

Modifier and Type	Method and Description
boolean	asBoolean() Gets the contained boolean value.
Boolean	asObject() Gets the value of the token as an object.
int	compareTo(BooleanToken that)
boolean	equals(Object obj) Indicates whether another object is equal to this token.
static BooleanToken	getToken(boolean value) Returns a token with the given non-null value boolean value.
static BooleanToken	getToken(BooleanValued value) Returns a token with the boolean value in the given container.
ScalarTokenType	getType() Gets the data type of the token.
int	hashCode() Returns a hash code for the token.
boolean	isNull() Indicates whether the token is null valued.
boolean	isZero() Indicates whether the value is the zero value for the type.
static BooleanToken	parse(String value) Converts a string representation of a boolean value into a token.
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.pervasive.datarush.tokens.DataToken

toString

Methods inherited from interface com.pervasive.datarush.tokens.scalar.ScalarValued

getType, isZero

Methods inherited from interface com.pervasive.datarush.tokens.TokenValued

isNull

Field Detail

NULL

public static final BooleanToken NULL

A null valued BooleanToken

TRUE

public static final BooleanToken TRUE

A BooleanToken with a value of true

FALSE

public static final BooleanToken FALSE

A BooleanToken with a value of false

ZERO_VALUE

public static final boolean ZERO_VALUE

The boolean representing a zero value, false.

See Also:

Constant Field Values

ZERO

public static final BooleanToken ZERO

A zero valued BooleanToken

Constructor Detail

BooleanToken

public BooleanToken(BooleanValued value)

Constructs a new token with the boolean value in the given container.

It is generally preferable to use getToken(BooleanValued) instead.

Parameters:

value - a BooleanValued containing the desired value

BooleanToken

public BooleanToken(boolean value)

Constructs a new token with the given non-null boolean value. If a null valued token is desired, use NULL.

It is generally preferable to use getToken(boolean) instead.

Parameters:

value - the boolean value of the token

Method Detail

getToken

public static BooleanToken getToken(BooleanValued value)

Returns a token with the boolean value in the given container. This method does not construct a new object, but returns the appropriate defined constant token instead.

Parameters:

value - a BooleanValued containing the desired value

Returns:

a token with the specified value

getToken

public static BooleanToken getToken(boolean value)

Returns a token with the given non-null value boolean value. This method does not construct a new object, but returns the appropriate defined constant token instead.

Parameters:

value - the boolean value of the token

Returns:

a non-null token with the specified value

asObject

public Boolean asObject()

Gets the value of the token as an object.

Returns:

an object representing the token value, null if the token is null valued.

compareTo

public int compareTo(BooleanToken that)

Specified by:

compareTo in interface Comparable<BooleanToken>

equals

public boolean equals(Object obj)

Description copied from interface: DataToken

Indicates whether another object is equal to this token. Two null valued tokens are considered equal. This differs from the behavior of TokenComparator.equal(TokenValued,TokenValued) but makes it possible to store DataTokens in Maps.

Specified by:

equals in interface DataToken

Overrides:

equals in class Object

Parameters:

obj - the object to compare

Returns:

true if the other object is a token of the same type and contains the same value, false otherwise.

hashCode

public int hashCode()

Description copied from interface: DataToken

Returns a hash code for the token. This value is guaranteed to be consistent with that returned by TokenConverter.asHashCode(TokenValued).

Specified by:

hashCode in interface DataToken

Overrides:

hashCode in class Object

Returns:

a hash code value for the token

parse

public static BooleanToken parse(String value)

Converts a string representation of a boolean value into a token.

Parameters:

value - a string value to interpret as a boolean; see Boolean.valueOf(String).

Returns:

a token with the specified value

getType

public final ScalarTokenType getType()

Description copied from interface: TokenValued

Gets the data type of the token. This type will dictate the valid values that can be contained.

Specified by:

getType in interface ScalarValued

Specified by:

getType in interface TokenValued

Specified by:

getType in interface ScalarTyped

Specified by:

getType in interface TokenTyped

Returns:

the token type.

isZero

public final boolean isZero()

Description copied from interface: ScalarValued

Indicates whether the value is the zero value for the type. Zero values are not stored in sparse representation formats.

Specified by:

isZero in interface ScalarValued

Returns:

true if the value is the zero value, false otherwise.

asBoolean

public final boolean asBoolean()

Description copied from interface: BooleanValued

Gets the contained boolean value.

Specified by:

asBoolean in interface BooleanValued

Returns:

the contained value as a boolean. If null valued, as indicated by TokenValued.isNull(), false is returned.

toString

public String toString()

Overrides:

toString in class Object

isNull

public final boolean isNull()

Description copied from interface: TokenValued

Indicates whether the token is null valued. Tokens support null values analogous to SQL. Before accessing the value of the container, it is usually best to ensure it is not null valued using this method.

Specified by:

isNull in interface TokenValued

Returns:

true if the token is null valued, false otherwise