org.hypergraphdb.storage

Class SearchResultWrapper<T>

java.lang.Object

org.hypergraphdb.storage.SearchResultWrapper<T>

Type Parameters:

T -

All Implemented Interfaces:

Iterator<T>, HGSearchResult<T>, TwoWayIterator<T>, CloseMe

public final class SearchResultWrapper<T>
extends Object
implements HGSearchResult<T>

Used to wrap a HGRandomAccessResult in order to "disable" it. This is need in certain cases where the underlying storage result set is not ordered or random access, for example when an index is queried with range queries (lt, gt etc.).

Author:

borislav

Field Summary

Fields inherited from interface org.hypergraphdb.HGSearchResult

EMPTY

Constructor Summary

Constructors

Constructor and Description
SearchResultWrapper(HGSearchResult<T> rs)

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.
T	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.
T	next()
T	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

Constructor Detail

SearchResultWrapper

public SearchResultWrapper(HGSearchResult<T> rs)

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<T>

next

public T next()

Specified by:

next in interface Iterator<T>

remove

public void remove()

Specified by:

remove in interface Iterator<T>

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<T>

Specified by:

close in interface CloseMe

current

public T 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<T>

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<T>

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<T>

prev

public T prev()

Description copied from interface: TwoWayIterator

Returns the previous element in this iteration.

Specified by:

prev in interface TwoWayIterator<T>