com.pervasive.datarush.tokens.scalar

Class CharToken

java.lang.Object

com.pervasive.datarush.tokens.scalar.CharToken

All Implemented Interfaces:

DataToken, CharValued, ScalarToken, ScalarValued, TokenValued, ScalarTyped, TokenTyped, Serializable, Comparable<CharToken>

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

An immutable CharValued object.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static CharToken	NULL A null valued CharToken
static CharToken	ZERO A zero valued CharToken
static char	ZERO_VALUE The character representing a zero value, '\0'.

Constructor Summary

Constructors

Constructor and Description
CharToken(char value) Constructs a new token with the given non-null character value.
CharToken(CharValued value) Constructs a new token with the character value in the given container.

Method Summary

Modifier and Type	Method and Description
char	asChar() Gets the contained character value.
Character	asObject() Gets the value of the token as an object.
int	compareTo(CharToken that)
boolean	equals(Object obj) Indicates whether another object is equal to this token.
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 CharToken	parse(String value) Converts a string representation of a char value into a token.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, 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 CharToken NULL

A null valued CharToken

ZERO_VALUE

public static final char ZERO_VALUE

The character representing a zero value, '\0'.

See Also:

Constant Field Values

ZERO

public static final CharToken ZERO

A zero valued CharToken

Constructor Detail

CharToken

public CharToken(CharValued value)

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

Parameters:

value - a CharValued containing the desired value

CharToken

public CharToken(char value)

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

Parameters:

value - the character value of the token

Method Detail

compareTo

public int compareTo(CharToken that)

Specified by:

compareTo in interface Comparable<CharToken>

asObject

public Character asObject()

Gets the value of the token as an object.

Returns:

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

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 CharToken parse(String value)

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

Parameters:

value - a string value to interpret as a character; this must be exactly 1 character in length

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.

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