org.hypergraphdb.query.impl
Class IndexBasedQuery

java.lang.Object
  org.hypergraphdb.HGQuery<java.lang.Object>
      org.hypergraphdb.query.impl.IndexBasedQuery

All Implemented Interfaces:

HGGraphHolder

public class IndexBasedQuery
extends HGQuery<java.lang.Object>

A simple query that operates on a single index.

Author:

Borislav Iordanov

Nested Class Summary

static class

IndexBasedQuery.ScanType

Nested classes/interfaces inherited from class org.hypergraphdb.HGQuery

HGQuery.hg

Field Summary

Fields inherited from class org.hypergraphdb.HGQuery

NOP

Constructor Summary

IndexBasedQuery(HGIndex<? extends java.lang.Object,? extends java.lang.Object> index, java.lang.Object key)

IndexBasedQuery(HGIndex<java.lang.Object,java.lang.Object> index, IndexBasedQuery.ScanType scanType)
Construct a query that will scan the whole index - either its keys or its values depending on the scanKeys parameter.

IndexBasedQuery(HGIndex<java.lang.Object,java.lang.Object> index, java.lang.Object key, ComparisonOperator operator)

Method Summary

HGRandomAccessResult<java.lang.Object>

execute()

Methods inherited from class org.hypergraphdb.HGQuery

getHyperGraph, make, setHyperGraph

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexBasedQuery

public IndexBasedQuery(HGIndex<java.lang.Object,java.lang.Object> index,
                       IndexBasedQuery.ScanType scanType)

Construct a query that will scan the whole index - either its keys or its values depending on the scanKeys parameter.

Parameters:

index - The HGIndex on which the query is performed.

scanKeys - true if all keys must be scanned and false if all values must be scanned instead.

IndexBasedQuery

public IndexBasedQuery(HGIndex<? extends java.lang.Object,? extends java.lang.Object> index,
                       java.lang.Object key)

IndexBasedQuery

public IndexBasedQuery(HGIndex<java.lang.Object,java.lang.Object> index,
                       java.lang.Object key,
                       ComparisonOperator operator)

Method Detail

execute

public HGRandomAccessResult<java.lang.Object> execute()

Specified by:

execute in class HGQuery<java.lang.Object>