Package uk.gov.gchq.gaffer.operation.util

Class OperationUtil

java.lang.Object

uk.gov.gchq.gaffer.operation.util.OperationUtil

public final class OperationUtil
extends Object

Utility methods for Operations.

Method Summary

Modifier and Type	Method	Description
static Operation	extractNextOp(Iterator<Operation> itr)
static Iterable<?>	fromElementIds(Iterable<? extends ElementId> input)	Takes an iterable of ElementIds and unwraps any EntityId into simple vertex objects.
static Iterable<?>	fromEntityIds(Iterable<? extends EntityId> input)	Takes an iterable of EntityIds and unwraps them into simple vertex objects.
static Iterable<? extends ElementId>	toElementIds(Iterable<?> input)	Converts an iterable of objects into ElementIds.
static Iterable<? extends ElementId>	toElementIds(Object... input)	Converts an array of objects into ElementIds.
static Iterable<? extends EntityId>	toEntityIds(Iterable<?> input)	Converts an iterable of objects into EntityIds.
static Iterable<? extends EntityId>	toEntityIds(Object... input)	Converts an array of objects into EntityIds.

Methods inherited from class java.lang.Object

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

Method Detail

toElementIds

public static Iterable<? extends ElementId> toElementIds(Object... input)

Converts an array of objects into ElementIds. If an item is not an ElementId then it is wrapped in an EntitySeed. If an item is already an ElementId is not modified.

Parameters:

input - an array containing vertices and ElementIds.

Returns:

an iterable if ElementIds.

toElementIds

public static Iterable<? extends ElementId> toElementIds(Iterable<?> input)

Converts an iterable of objects into ElementIds. If an item is not an ElementId then it is wrapped in an EntitySeed. If an item is already an ElementId is not modified. The conversion is done lazily.

Parameters:

input - an iterable containing vertices and ElementIds.

Returns:

an iterable if ElementIds.

fromElementIds

public static Iterable<?> fromElementIds(Iterable<? extends ElementId> input)

Takes an iterable of ElementIds and unwraps any EntityId into simple vertex objects. The conversion is done lazily.

Parameters:

input - an iterable if ElementIds.

Returns:

an iterable if EdgeIds and vertices.

toEntityIds

public static Iterable<? extends EntityId> toEntityIds(Object... input)

Converts an array of objects into EntityIds. If an item is not an EntityId then it is wrapped in an EntitySeed. If an item is already an EntityId is not modified.

Parameters:

input - an array containing vertices and EntityIds.

Returns:

an iterable if EntityIds.

toEntityIds

public static Iterable<? extends EntityId> toEntityIds(Iterable<?> input)

Converts an iterable of objects into EntityIds. If an item is not an EntityId then it is wrapped in an EntitySeed. If an item is already an EntityId is not modified. The conversion is done lazily.

Parameters:

input - an iterable containing vertices and EntityIds.

Returns:

an iterable if EntityIds.

fromEntityIds

public static Iterable<?> fromEntityIds(Iterable<? extends EntityId> input)

Takes an iterable of EntityIds and unwraps them into simple vertex objects. The conversion is done lazily.

Parameters:

input - an iterable if ElementIds.

Returns:

an iterable if EdgeIds and vertices.

extractNextOp

public static Operation extractNextOp(Iterator<Operation> itr)