com.pervasive.datarush.sequences.scalar

Class AbstractScalarTokenSequence

java.lang.Object

com.pervasive.datarush.sequences.scalar.AbstractScalarTokenSequence

All Implemented Interfaces:

MutableTokenSequence, MutableScalarTokenSequence, ScalarTokenAppendable, ScalarTokenSequence, TokenAppendable, TokenSequence, ScalarTyped, TokenTyped

Direct Known Subclasses:

BinaryTokenList, BooleanTokenList, CharTokenList, DateTokenList, DoubleTokenList, DurationTokenList, FloatTokenList, IntTokenList, Ip4AddressTokenList, Ip6AddressTokenList, LongTokenList, MoneyTokenList, NumericTokenList, ObjectTokenList, PeriodTokenList, StringTokenList, TimestampTokenList, TimeTokenList

public abstract class AbstractScalarTokenSequence
extends Object
implements MutableScalarTokenSequence

A TokenSequence containing scalar typed tokens. The scalar token types are enumerated in TokenTypeConstant.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractScalarTokenSequence(boolean[] nullFlags, int capacity, int length) Create a ScalarTokenSequence backed with the specified data.

Method Summary

Modifier and Type	Method and Description
void	append(TokenSequence data) Appends all tokens in the specified sequence to this sequence.
void	append(TokenSequence data, int start, int length) Appends a subsequence of tokens in the specified sequence to this sequence.
void	append(TokenValued in) Appends the specified token value to this sequence.
void	append(TokenValued in, long count) Appends the specified token value to this sequence multiple times.
void	appendNull() Append a null value to this sequence.
void	appendNull(int count) Append a null value to this sequence.
void	appendZero() Appends a zero value to this sequence.
void	appendZero(int count) Appends the specified number of zero values to this sequence.
int	capacity() Gets the maximum capacity of the sequence.
int	compareElement(int index, TokenValued value) Compares the value of the specified token to the token at which the given port is positioned.
int	compareElements(int lhsIndex, int rhsIndex) Compares the values of the tokens at the specified positions.
void	ensureCanonical() Ensures that the internal representation is in a canonical form such that it can be read safely by multiple threads.
ElementComparator	getElementComparator(TokenOrder sortOrder) Gets an ElementComparator for this sequence using the specified ordering.
long	getModificationCount() Returns the current modification count.
int	hashCode(int index) Gets the hash code for the token at the specified position.
boolean	isNull() Returns whether all elements are null.
boolean	isNull(int i) Indicates whether the specified token has a null value.
void	map(int[] sortOrder) Remaps the sequence according to the specified ordering.
int	remaining() Gets the remaining capacity of the sequence.
void	reset() Removes all elements from the sequence.
int	size() Gets the length of the sequence.
String	toString()
String	toString(int index) Gets the string representation of the token at the specified position.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.pervasive.datarush.sequences.scalar.MutableScalarTokenSequence

getTokenSetter

Methods inherited from interface com.pervasive.datarush.sequences.scalar.ScalarTokenSequence

getToken, getType, isZero, newValueIterator

Methods inherited from interface com.pervasive.datarush.sequences.MutableTokenSequence

fillValue, setNull, setNull, setValue, setValues, setZero, setZero

Constructor Detail

AbstractScalarTokenSequence

protected AbstractScalarTokenSequence(boolean[] nullFlags,
                                      int capacity,
                                      int length)

Create a ScalarTokenSequence backed with the specified data.

Parameters:

nullFlags - the null flags for array elements;

capacity - the capacity

length - the number of elements in the array

Method Detail

isNull

public boolean isNull()

Description copied from interface: ScalarTokenSequence

Returns whether all elements are null.

Specified by:

isNull in interface ScalarTokenSequence

Returns:

whether all elements are null.

getModificationCount

public final long getModificationCount()

Description copied from interface: MutableScalarTokenSequence

Returns the current modification count. Modification count must be strictly increasing.

Specified by:

getModificationCount in interface MutableScalarTokenSequence

Returns:

the current change sequence number

size

public final int size()

Description copied from interface: TokenSequence

Gets the length of the sequence.

Specified by:

size in interface TokenSequence

Returns:

the number of tokens in the sequence.

isNull

public final boolean isNull(int i)

Description copied from interface: TokenSequence

Indicates whether the specified token has a null value.

Specified by:

isNull in interface TokenSequence

Parameters:

i - the index of the token

Returns:

true if the element is null, false otherwise

compareElement

public final int compareElement(int index,
                                TokenValued value)

Description copied from interface: TokenSequence

Compares the value of the specified token to the token at which the given port is positioned.

Specified by:

compareElement in interface TokenSequence

Parameters:

index - the index of the token

value - the input port positioned at the token for comparison

Returns:

0 if the values are equal, 1 if the sequence token value is greater, -1 if the sequence token value is lesser. A null value is greater than any other non-null; two null values compare as equal.

compareElements

public final int compareElements(int lhsIndex,
                                 int rhsIndex)

Description copied from interface: TokenSequence

Compares the values of the tokens at the specified positions.

Specified by:

compareElements in interface TokenSequence

Parameters:

lhsIndex - the index of the left-hand element

rhsIndex - the index of the right-hand element

Returns:

0 if the values are equal, 1 if the left hand value is greater, -1 if the left hand value is lesser. A null value is greater than any other non-null; two null values compare as equal.

getElementComparator

public final ElementComparator getElementComparator(TokenOrder sortOrder)

Description copied from interface: TokenSequence

Gets an ElementComparator for this sequence using the specified ordering.

Specified by:

getElementComparator in interface TokenSequence

Parameters:

sortOrder - the desired ordering

Returns:

an ElementComparator for this sequence.

hashCode

public final int hashCode(int index)

Description copied from interface: TokenSequence

Gets the hash code for the token at the specified position.

Specified by:

hashCode in interface TokenSequence

Parameters:

index - the index of the token

Returns:

the hash code for the token

toString

public String toString()

Overrides:

toString in class Object

toString

public final String toString(int index)

Description copied from interface: TokenSequence

Gets the string representation of the token at the specified position.

Specified by:

toString in interface TokenSequence

Parameters:

index - the index of the token

Returns:

the string representation of the token

ensureCanonical

public final void ensureCanonical()

Description copied from interface: MutableScalarTokenSequence

Ensures that the internal representation is in a canonical form such that it can be read safely by multiple threads.

Specified by:

ensureCanonical in interface MutableScalarTokenSequence

remaining

public final int remaining()

Gets the remaining capacity of the sequence.

Returns:

the number of tokens which can be appended.

capacity

public final int capacity()

Gets the maximum capacity of the sequence.

Returns:

the maximum number of tokens which can be in the sequence

appendNull

public void appendNull()

Append a null value to this sequence.

Specified by:

appendNull in interface MutableTokenSequence

appendNull

public void appendNull(int count)

Append a null value to this sequence.

Specified by:

appendNull in interface MutableTokenSequence

Parameters:

count - the number of null values to append

appendZero

public final void appendZero()

Description copied from interface: MutableTokenSequence

Appends a zero value to this sequence.

Specified by:

appendZero in interface MutableTokenSequence

appendZero

public final void appendZero(int count)

Description copied from interface: MutableTokenSequence

Appends the specified number of zero values to this sequence.

Specified by:

appendZero in interface MutableTokenSequence

Parameters:

count - the number of zero values to append

reset

public void reset()

Description copied from interface: MutableTokenSequence

Removes all elements from the sequence.

Specified by:

reset in interface MutableTokenSequence

append

public void append(TokenValued in)

Description copied from interface: TokenAppendable

Appends the specified token value to this sequence.

The data types of the sequence and the value must be compatible. If the types are not identical, appropriate coercion will be attempted.

Specified by:

append in interface TokenAppendable

Parameters:

in - the token value to append

append

public void append(TokenValued in,
                   long count)

Description copied from interface: TokenAppendable

Appends the specified token value to this sequence multiple times.

The data types of the sequence and the value must be compatible. If the types are not identical, appropriate coercion will be attempted.

Specified by:

append in interface TokenAppendable

Parameters:

in - the token value to append

count - the number of copies to append

append

public void append(TokenSequence data)

Description copied from interface: TokenAppendable

Appends all tokens in the specified sequence to this sequence.

The data types of the sequences must be compatible. If not identical, appropriate coercion will be attempted.

Specified by:

append in interface TokenAppendable

Parameters:

data - the sequence to append

append

public void append(TokenSequence data,
                   int start,
                   int length)

Description copied from interface: TokenAppendable

Appends a subsequence of tokens in the specified sequence to this sequence.

The data types of the sequences must be compatible. If not identical, appropriate coercion will be attempted.

Specified by:

append in interface TokenAppendable

Parameters:

data - the sequence containing tokens to append

start - the starting index of the subsequence in the source

length - the length of the subsequence

map

public final void map(int[] sortOrder)

Remaps the sequence according to the specified ordering.

Parameters:

sortOrder - the reording of the sequence