note

VeloxDB is still in beta and APIs are subject to change. We are in the process of completing the documentation, so some sections may be incomplete or empty at this time.

Class SortedIndexReader<T, TKey1, TKey2>

Reader for sorted index with two properties as a key. Use this class to lookup a DatabaseObject using sorted index.

Inheritance

System.Object

SortedIndexReader<T, TKey1, TKey2>

Namespace: VeloxDB.ObjectInterface

Assembly: vlxdb.dll

Syntax

public sealed class SortedIndexReader<T, TKey1, TKey2> : Object where T : DatabaseObject

Type Parameters

Name	Description
T	Type of DatabaseObject being looked up.
TKey1	Type of the first key property.
TKey2	Type of the second key property.

Methods

GetAfter(TKey1, TKey2, ScanDirection)

Searches the sorted index using the condition (key1, key2) > (keyProperty1, keyProperty2). Keep in mind that signs < and > are relative to the sorting order of the property in the index, meaning before and after in the sort order.

Declaration

public IEnumerable<T> GetAfter(TKey1 key1, TKey2 key2, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
TKey2	key2	The value of the second key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetAfter(TKey1, ScanDirection)

Searches the sorted index using the condition key1 >= keyProperty1. Keep in mind that signs < and > are relative to the sorting order of the property in the index, meaning before and after in the sort order.

Declaration

public IEnumerable<T> GetAfter(TKey1 key1, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetAfterOrEqual(TKey1, TKey2, ScanDirection)

Searches the sorted index using the condition (key1, key2) >= (keyProperty1, keyProperty2). Keep in mind that signs < and > are relative to the sorting order of the property in the index, meaning before and after in the sort order.

Declaration

public IEnumerable<T> GetAfterOrEqual(TKey1 key1, TKey2 key2, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
TKey2	key2	The value of the second key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetAfterOrEqual(TKey1, ScanDirection)

Declaration

public IEnumerable<T> GetAfterOrEqual(TKey1 key1, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetBefore(TKey1, TKey2, ScanDirection)

Searches the sorted index using the condition (key1, key2) < (keyProperty1, keyProperty2). Keep in mind that signs < and > are relative to the sorting order of the property in the index, meaning before and after in the sort order.

Declaration

public IEnumerable<T> GetBefore(TKey1 key1, TKey2 key2, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
TKey2	key2	The value of the second key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetBefore(TKey1, ScanDirection)

Searches the sorted index using the condition key1 < keyProperty1. Keep in mind that signs < and > are relative to the sorting order of the property in the index, meaning before and after in the sort order.

Declaration

public IEnumerable<T> GetBefore(TKey1 key1, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetBeforeOrEqual(TKey1, TKey2, ScanDirection)

Searches the sorted index using the condition (key1, key2) <= (keyProperty1, keyProperty2). Keep in mind that signs < and > are relative to the sorting order of the property in the index, meaning before and after in the sort order.

Declaration

public IEnumerable<T> GetBeforeOrEqual(TKey1 key1, TKey2 key2, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
TKey2	key2	The value of the second key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetBeforeOrEqual(TKey1, ScanDirection)

Searches the sorted index using the condition key1 <= keyProperty1. Keep in mind that signs < and > are relative to the sorting order of the property in the index, meaning before and after in the sort order.

Declaration

public IEnumerable<T> GetBeforeOrEqual(TKey1 key1, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetEntireRange(ScanDirection)

Returns all the objects in the index.

Declaration

public IEnumerable<T> GetEntireRange(ScanDirection scanDirection)

Parameters

Type	Name	Description
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetEqual(TKey1, TKey2)

Searches the sorted index using the condition key1 = keyProperty1 AND key2 == keyProperty2. This method returns at most a single object with a given key and is ideal for querying unique indexes.

Declaration

public T GetEqual(TKey1 key1, TKey2 key2)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
TKey2	key2	The value of the second key property.

Returns

Type	Description
T	An object with a given key, if one exists, null otherwise.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetEqual(TKey1, TKey2, ScanDirection)

Searches the sorted index using the condition key1 = keyProperty1 AND key2 = keyProperty2.

Declaration

public IEnumerable<T> GetEqual(TKey1 key1, TKey2 key2, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
TKey2	key2	The value of the second key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetEqual(TKey1, ScanDirection)

Searches the sorted index using the condition key1 = keyProperty1.

Declaration

public IEnumerable<T> GetEqual(TKey1 key1, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetPartialAfter(TKey1, TKey2, ScanDirection)

Searches the sorted index using the condition key1 == keyProperty1 AND key2 > keyProperty2. Keep in mind that signs < and > are relative to the sorting order of the property in the index, meaning before and after in the sort order.

Declaration

public IEnumerable<T> GetPartialAfter(TKey1 key1, TKey2 key2, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
TKey2	key2	The value of the second key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetPartialAfterOrEqual(TKey1, TKey2, ScanDirection)

Searches the sorted index using the condition key1 == keyProperty1 AND key2 >= keyProperty2. Keep in mind that signs < and > are relative to the sorting order of the property in the index, meaning before and after in the sort order.

Declaration

public IEnumerable<T> GetPartialAfterOrEqual(TKey1 key1, TKey2 key2, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
TKey2	key2	The value of the second key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetPartialBefore(TKey1, TKey2, ScanDirection)

Searches the sorted index using the condition key1 = keyProperty1 AND key2 < keyProperty2. Keep in mind that signs < and > are relative to the sorting order of the property in the index, meaning before and after in the sort order.

Declaration

public IEnumerable<T> GetPartialBefore(TKey1 key1, TKey2 key2, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
TKey2	key2	The value of the second key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetPartialBeforeOrEqual(TKey1, TKey2, ScanDirection)

Searches the sorted index using the condition key1 = keyProperty1 AND key2 <= keyProperty2. Keep in mind that signs < and > are relative to the sorting order of the property in the index, meaning before and after in the sort order.

Declaration

public IEnumerable<T> GetPartialBeforeOrEqual(TKey1 key1, TKey2 key2, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	key1	The value of the first key property.
TKey2	key2	The value of the second key property.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetRange(TKey1, TKey2, Boolean, TKey1, TKey2, Boolean, ScanDirection)

Returns all the objects in the index that belong to the given interval.

Declaration

public IEnumerable<T> GetRange(TKey1 startKey1, TKey2 startKey2, bool isStartOpen, TKey1 endKey1, TKey2 endKey2, bool isEndOpen, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	startKey1	The value of the first key property for the range start.
TKey2	startKey2	The value of the second key property for the range start.
System.Boolean	isStartOpen	Indicates whether the start side of the interval is open or closed.
TKey1	endKey1	The value of the first key property for the range end.
TKey2	endKey2	The value of the second key property for the range end.
System.Boolean	isEndOpen	Indicates whether the end side of the interval is open or closed.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.

GetRange(TKey1, Boolean, TKey1, Boolean, ScanDirection)

Returns all the objects in the index that belong to the given interval.

Declaration

public IEnumerable<T> GetRange(TKey1 startKey1, bool isStartOpen, TKey1 endKey1, bool isEndOpen, ScanDirection scanDirection)

Parameters

Type	Name	Description
TKey1	startKey1	The value of the first key property for the range start.
System.Boolean	isStartOpen	Indicates whether the start side of the interval is open or closed.
TKey1	endKey1	The value of the first key property for the range end.
System.Boolean	isEndOpen	Indicates whether the end side of the interval is open or closed.
ScanDirection	scanDirection	Indicates a direction in which to scan the index.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	All objects from the index that satisfy the required condition.

Exceptions

Type	Condition
System.ObjectDisposedException	If ObjectModel has been disposed.