Class ExpressionTransformationContextSupport<T extends ExpressionNode>

java.lang.Object

org.springframework.data.mongodb.core.spel.ExpressionTransformationContextSupport<T>

public class ExpressionTransformationContextSupport<T extends ExpressionNode>
extends Object

The context for an ExpressionNode transformation.

Author:

Thomas Darimont, Oliver Gierke, Christoph Strobl, Mark Paluch

Constructor Summary

Constructors

Constructor	Description
ExpressionTransformationContextSupport(T currentNode, @Nullable ExpressionNode parentNode, @Nullable org.bson.Document previousOperationObject)	Creates a new ExpressionTransformationContextSupport for the given ExpressionNodes and an optional previous operation.

Method Summary

Modifier and Type	Method	Description
org.bson.Document	addToPreviousOperation(@Nullable Object value)	Adds the given value to the previous operation and returns it.
@Nullable Object	addToPreviousOrReturn(@Nullable Object value)	Adds the given value to the previous operation if one is present or returns the value to add as is.
T	getCurrentNode()	Returns the current ExpressionNode.
@Nullable ExpressionNode	getParentNode()	Returns the parent ExpressionNode or null if none available.
@Nullable org.bson.Document	getPreviousOperationObject()	Returns the previously accumulated operation object or null if none available.
boolean	hasPreviousOperation()	Returns whether a previous operation is present.
boolean	parentIsSameOperation()	Returns whether the parent node is of the same operation as the current node.

Methods inherited from class Object

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

Constructor Details

ExpressionTransformationContextSupport

public ExpressionTransformationContextSupport(T currentNode,
 @Nullable ExpressionNode parentNode,
 @Nullable org.bson.Document previousOperationObject)

Creates a new ExpressionTransformationContextSupport for the given ExpressionNodes and an optional previous operation.

Parameters:

currentNode - must not be null.

parentNode - may be null.

previousOperationObject - may be null.

Method Details

getCurrentNode

public T getCurrentNode()

Returns the current ExpressionNode.

Returns:

getParentNode

public @Nullable ExpressionNode getParentNode()

Returns the parent ExpressionNode or null if none available.

Returns:

getPreviousOperationObject

public @Nullable org.bson.Document getPreviousOperationObject()

Returns the previously accumulated operation object or null if none available. Rather than manually adding stuff to the object prefer using addToPreviousOrReturn(Object) to transparently do if one is present.

Returns:

See Also:

• hasPreviousOperation()
• addToPreviousOrReturn(Object)

hasPreviousOperation

public boolean hasPreviousOperation()

Returns whether a previous operation is present.

Returns:

parentIsSameOperation

public boolean parentIsSameOperation()

Returns whether the parent node is of the same operation as the current node.

Returns:

addToPreviousOperation

public org.bson.Document addToPreviousOperation(@Nullable Object value)

Adds the given value to the previous operation and returns it.

Parameters:

value -

Returns:

addToPreviousOrReturn

public @Nullable Object addToPreviousOrReturn(@Nullable Object value)

Adds the given value to the previous operation if one is present or returns the value to add as is.

Parameters:

value -

Returns: