org.hypergraphdb.query.impl

Class HandleArrayResultSet

java.lang.Object

org.hypergraphdb.query.impl.HandleArrayResultSet

All Implemented Interfaces:

Iterator<HGHandle>, HGSearchResult<HGHandle>, TwoWayIterator<HGHandle>, CloseMe

public class HandleArrayResultSet
extends Object
implements HGSearchResult<HGHandle>

Implements a HGSearchResult comprising the atoms in a given HGHandle array.

Note: this is not an ordered result set, but can easily be made so if this proves beneficial.

Author:

Borislav Iordanov

Field Summary

Fields

Modifier and Type	Field and Description
protected HGHandle[]	A
protected int	end
protected int	pos
protected int	start

Fields inherited from interface org.hypergraphdb.HGSearchResult

EMPTY

Constructor Summary

Constructors

Constructor and Description
HandleArrayResultSet(HGHandle[] array)
HandleArrayResultSet(HGHandle[] array, int start)
HandleArrayResultSet(HGHandle[] array, int start, int end)

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Free all system resources held up by the result set and invalidate it for further use.
HGHandle	current() Returns the current element in the result set.
boolean	hasNext()
boolean	hasPrev() Return true if there is a previous element in the current iteration state and false otherwise.
boolean	isOrdered() Return true if the elements in this search result are in ordered and false otherwise.
HGHandle	next()
HGHandle	prev() Returns the previous element in this iteration.
void	remove()

Methods inherited from class java.lang.Object

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

Field Detail

A

protected HGHandle[] A

start

protected int start

end

protected int end

pos

protected int pos

Constructor Detail

HandleArrayResultSet

public HandleArrayResultSet(HGHandle[] array)

HandleArrayResultSet

public HandleArrayResultSet(HGHandle[] array,
                    int start)

HandleArrayResultSet

public HandleArrayResultSet(HGHandle[] array,
                    int start,
                    int end)

Method Detail

close

public void close()

Description copied from interface: HGSearchResult

Free all system resources held up by the result set and invalidate it for further use.

Specified by:

close in interface HGSearchResult<HGHandle>

Specified by:

close in interface CloseMe

current

public HGHandle current()

Description copied from interface: HGSearchResult

Returns the current element in the result set. If there is no current element, java.util.NoSuchElementException is thrown. There is no current element if the next method was never invoked.

Specified by:

current in interface HGSearchResult<HGHandle>

Returns:

The current element in a HGSearchResult.

isOrdered

public boolean isOrdered()

Description copied from interface: HGSearchResult

Return true if the elements in this search result are in ordered and false otherwise. It is assumed that when elements are ordered, they are instances of java.lang.Comparable

Specified by:

isOrdered in interface HGSearchResult<HGHandle>

hasPrev

public boolean hasPrev()

Description copied from interface: TwoWayIterator

Return true if there is a previous element in the current iteration state and false otherwise. After the iterator has been initialized, the value of hasPrev will always be false.

Specified by:

hasPrev in interface TwoWayIterator<HGHandle>

prev

public HGHandle prev()

Description copied from interface: TwoWayIterator

Returns the previous element in this iteration.

Specified by:

prev in interface TwoWayIterator<HGHandle>

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<HGHandle>

next

public HGHandle next()

Specified by:

next in interface Iterator<HGHandle>

remove

public void remove()

Specified by:

remove in interface Iterator<HGHandle>