Package org.springframework.data.mongodb.core.spel

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, ExpressionNode parentNode, 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(Object value)	Adds the given value to the previous operation and returns it.
Object	addToPreviousOrReturn(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.
ExpressionNode	getParentNode()	Returns the parent ExpressionNode or null if none available.
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 java.lang.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

@Nullable
public ExpressionNode getParentNode()

Returns the parent ExpressionNode or null if none available.

Returns:

getPreviousOperationObject

@Nullable
public 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(Object value)

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

Parameters:

value -

Returns:

addToPreviousOrReturn

public Object addToPreviousOrReturn(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: