com.pervasive.datarush.tokens.scalar

Class NumericToken

java.lang.Object

com.pervasive.datarush.tokens.scalar.NumericToken

All Implemented Interfaces:

DataToken, NumericValued, ScalarToken, ScalarValued, TokenValued, ScalarTyped, TokenTyped, Serializable, Comparable<NumericToken>

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

An immutable NumericValued object.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static NumericToken	NULL A null valued NumericToken
static NumericToken	ZERO A zero valued NumericToken
static BigDecimal	ZERO_VALUE The numeric zero value, BigDecimal.ZERO.

Fields inherited from interface com.pervasive.datarush.tokens.scalar.NumericValued

MAX_INFINITY, MIN_INFINITY

Constructor Summary

Constructors

Constructor and Description
NumericToken(BigDecimal value) Constructs a new token with the given non-null numeric value specified as a java.math.BigDecimal.
NumericToken(double value) Constructs a new token with the given non-null double value.
NumericToken(long value) Constructs a new token with the given non-null long value.
NumericToken(NumericValued value) Constructs a new token with the numeric value in the given container.

Method Summary

Modifier and Type	Method and Description
BigDecimal	asBigDecimal() Gets the contained numeric value.
int	compareTo(NumericToken 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 NumericToken	parse(String value) Converts a string representation of a numeric 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 NumericToken NULL

A null valued NumericToken

ZERO_VALUE

public static final BigDecimal ZERO_VALUE

The numeric zero value, BigDecimal.ZERO.

ZERO

public static final NumericToken ZERO

A zero valued NumericToken

Constructor Detail

NumericToken

public NumericToken(NumericValued value)

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

Parameters:

value - a NumericValued containing the desired value

NumericToken

public NumericToken(BigDecimal value)

Constructs a new token with the given non-null numeric value specified as a java.math.BigDecimal. If a null valued token is desired, use NULL.

Parameters:

value - the numeric value of the token

Throws:

NullPointerException - if the value is null.

NumericToken

public NumericToken(double value)

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

Parameters:

value - the long value of the token

NumericToken

public NumericToken(long value)

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

Parameters:

value - the long value of the token

Method Detail

compareTo

public int compareTo(NumericToken that)

Specified by:

compareTo in interface Comparable<NumericToken>

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 NumericToken parse(String value)

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

Parameters:

value - a string value to interpret as a BigDecimal; see BigDecimal.BigDecimal(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.

asBigDecimal

public final BigDecimal asBigDecimal()

Description copied from interface: NumericValued

Gets the contained numeric value.

Specified by:

asBigDecimal in interface NumericValued

Returns:

the contained value as a java.math.BigDecimal. If null valued, as indicated by TokenValued.isNull(), null 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