dk.rode.thesis.meta.model
Class LongSequence

java.lang.Object
  dk.rode.thesis.meta.model.AbstractSequence<Long>
      dk.rode.thesis.meta.model.LongSequence

All Implemented Interfaces:

Sequence<Long>, Copyable<Sequence<Long>>, StrictCopyable<Sequence<Long>>, Stringable<Sequence<Long>>

Direct Known Subclasses:

VisitableLongSequence

public class LongSequence
extends AbstractSequence<Long>
implements Sequence<Long>

A long sequence represents an unbounded long value that is increased with each call to next().

A long sequence is unbounded, but unique and consistent.

Author:

Gunni Rode / rode.dk

Nested Class Summary

Nested classes/interfaces inherited from interface dk.rode.thesis.meta.model.Sequence

Sequence.State

Field Summary

private long	sequence The current sequence number.
private long	start Start number of this sequence.

Fields inherited from class dk.rode.thesis.meta.model.AbstractSequence

state

Constructor Summary

LongSequence()
No-arg constructor.

LongSequence(long start)
Constructor.

LongSequence(LongSequence sequence)
Copy constructor.

Method Summary

boolean	bounded() Returns false.
boolean	consistent() Returns true.
LongSequence	copy() Returns a copy of this sequence that will start at the same sequence index as this sequence.
Long	current() Returns the current element from this sequence.
Long	next() Returns the next element from this sequence.
void	reset() Resets this sequence to start over if it is consistent.
boolean	unique() Returns true.

Methods inherited from class dk.rode.thesis.meta.model.AbstractSequence

getStringablePolicy, state, toString, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface dk.rode.thesis.meta.model.Sequence

state

Methods inherited from interface dk.rode.thesis.strategy.Stringable

getStringablePolicy, toString

Field Detail

sequence

private long sequence

The current sequence number.

start

private final long start

Start number of this sequence.

Constructor Detail

LongSequence

public LongSequence()

No-arg constructor.

LongSequence

public LongSequence(long start)

Constructor.

Parameters:

start - The start value of this sequence.

LongSequence

public LongSequence(LongSequence sequence)

Copy constructor.

Parameters:

sequence - The sequence to copy; cannot be null.

Throws:

NullPointerException - If sequence is null.

Method Detail

bounded

public boolean bounded()

Returns false.

Specified by:

bounded in interface Sequence<Long>

Returns:

False.

See Also:

Sequence.unique()

consistent

public boolean consistent()

Returns true.

Specified by:

consistent in interface Sequence<Long>

Returns:

True.

copy

public LongSequence copy()

Description copied from interface: Sequence

Returns a copy of this sequence that will start at the same sequence index as this sequence.

Specified by:

copy in interface Sequence<Long>

Specified by:

copy in interface Copyable<Sequence<Long>>

Returns:

A copy of this sequence; never null.

current

public Long current()

Description copied from interface: Sequence

Returns the current element from this sequence.

This method can be invoked even if Sequence.next() has not been invoked yet, thus delivering the initial value of this sequence.

Specified by:

current in interface Sequence<Long>

Returns:

The current element; never null.

next

public Long next()

Description copied from interface: Sequence

Returns the next element from this sequence.

Specified by:

next in interface Sequence<Long>

Returns:

The next element; never null.

See Also:

Sequence.current(), Sequence.state()

reset

public void reset()

Description copied from interface: Sequence

Resets this sequence to start over if it is consistent.

If this sequence is consistent, the sequence will restart.

Specified by:

reset in interface Sequence<Long>

Overrides:

reset in class AbstractSequence<Long>

unique

public boolean unique()

Returns true.

Specified by:

unique in interface Sequence<Long>

Returns:

True.

See Also:

Sequence.consistent()