com.redhat.lightblue.eval

Class SetExpressionEvaluator

java.lang.Object

com.redhat.lightblue.eval.Updater

com.redhat.lightblue.eval.SetExpressionEvaluator

public class SetExpressionEvaluator
extends Updater

Sets a field value

Constructor Summary

Constructors

Constructor and Description
SetExpressionEvaluator(com.fasterxml.jackson.databind.node.JsonNodeFactory factory, FieldTreeNode context, SetExpression expr) Creates a set expression evaluator

Method Summary

Modifier and Type	Method and Description
void	getUpdateFields(Set<Path> fields) 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

SetExpressionEvaluator

public SetExpressionEvaluator(com.fasterxml.jackson.databind.node.JsonNodeFactory factory,
                              FieldTreeNode context,
                              SetExpression expr)

Creates a set expression evaluator

Parameters:

factory - Node factory

context - The context from which the expression will be evaluated

expr - The set expression This ctor resolves the field references in expr and stores them to be applied later.

Method Detail

getUpdateFields

public void getUpdateFields(Set<Path> fields)

Description copied from class: Updater

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

Specified by:

getUpdateFields in class Updater

Parameters:

fields - 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