com.pervasive.datarush.tokens.scalar

Class CharRegister

java.lang.Object

com.pervasive.datarush.tokens.scalar.CharRegister

All Implemented Interfaces:

DataRegister, CharSettable, CharValued, ScalarRegister, ScalarSettable, ScalarValued, TokenSettable, TokenValued, ScalarTyped, TokenTyped, Serializable

public final class CharRegister
extends Object
implements ScalarRegister, CharSettable

A mutable CharValued object.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CharRegister() Creates a new null-valued register.

Method Summary

Modifier and Type	Method and Description
char	asChar() Gets the contained character value.
ScalarTokenType	getType() Gets the data type of the token.
boolean	isNull() Indicates whether the token is null valued.
boolean	isZero() Indicates whether the value is the zero value for the type.
void	set(char value) Sets the container to the given character value.
void	set(TokenValued value) Sets the contained value to the given token value.
void	setNull() Sets the contained value to be null valued.
void	setZero() Sets the contained value to be zero valued.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

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

getType, isZero

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

isNull

Constructor Detail

CharRegister

public CharRegister()

Creates a new null-valued register.

Method Detail

setNull

public void setNull()

Description copied from interface: TokenSettable

Sets the contained value to be null valued.

Specified by:

setNull in interface TokenSettable

setZero

public void setZero()

Description copied from interface: TokenSettable

Sets the contained value to be zero valued.

Specified by:

setZero in interface TokenSettable

set

public void set(char value)

Description copied from interface: CharSettable

Sets the container to the given character value.

Specified by:

set in interface CharSettable

Parameters:

value - character value to which to set the container

set

public void set(TokenValued value)

Description copied from interface: TokenSettable

Sets the contained value to the given token value. The given value must have a type compatible with this object.

Specified by:

set in interface TokenSettable

Parameters:

value - the value to which to set the container

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.

asChar

public final char asChar()

Description copied from interface: CharValued

Gets the contained character value.

Specified by:

asChar in interface CharValued

Returns:

the contained value as a char. If null valued, as indicated by TokenValued.isNull(), Character.MAX_VALUE is returned.

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.

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