com.redhat.lightblue.eval

Class UnsetExpressionEvaluator

java.lang.Object

com.redhat.lightblue.eval.Updater

com.redhat.lightblue.eval.UnsetExpressionEvaluator

public class UnsetExpressionEvaluator
extends Updater

Removes a field from a doc. Removals take place one by one, results of a removal are visible to the subsequent operations

Constructor Summary

Constructors

Constructor and Description
UnsetExpressionEvaluator(com.fasterxml.jackson.databind.node.JsonNodeFactory factory, FieldTreeNode context, UnsetExpression expr)

Method Summary

Methods

Modifier and Type	Method and Description
void	getUpdateFields(Set<Path> setFields) Add the fields updated by this updater to the set of fields.
boolean	update(JsonDoc doc, FieldTreeNode contextMd, Path contextPath) The implementation should update the document

Methods inherited from class com.redhat.lightblue.eval.Updater

getInstance, getInstance, getUpdateFields

Methods inherited from class java.lang.Object

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

Constructor Detail

UnsetExpressionEvaluator

public UnsetExpressionEvaluator(com.fasterxml.jackson.databind.node.JsonNodeFactory factory,
                        FieldTreeNode context,
                        UnsetExpression expr)

Method Detail

getUpdateFields

public void getUpdateFields(Set<Path> setFields)

Description copied from class: Updater

Add the fields updated by this updater to the set of fields.

Specified by:

getUpdateFields in class Updater

Parameters:

setFields - A Set to receive the fields to be updated The fields list should be added the absolute paths

update

public boolean update(JsonDoc doc,
             FieldTreeNode contextMd,
             Path contextPath)

Description copied from class: Updater

The implementation should update the document

Specified by:

update in class Updater

contextMd - The metadata for the current context

contextPath - Absolute path to current context

Returns:

true if document is updated, false if not