com.redhat.lightblue.assoc

Class ResolvedFieldBinding

java.lang.Object

com.redhat.lightblue.assoc.ResolvedFieldBinding

All Implemented Interfaces:

Serializable

public class ResolvedFieldBinding
extends Object
implements Serializable

This class represents a field binding interpreted based on the metadata. It contains the original field binding information, the field type information, and the field name relative to an entity in a query plan that denotes the field name containing the value that is bound in the field binding. For example:

    query={'field':'field1','op':'=','rfield':'$parent.referencedField'}
 

Assume referencedField is bound to a value in a different entity. Then, binding contains the binding information for referencedField, type contains the type of referencedField, and valueField contains referencedField, the field relative to the entity it is contained in. If the binding is a list binding, then type keeps the type of the list element.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ResolvedFieldBinding.BindResult This class is used to return binding results.

Constructor Summary

Constructors

Constructor and Description
ResolvedFieldBinding(FieldBinding b, CompositeMetadata root) Construct a resolved field binding using the given binding and the root composite metadata

Method Summary

Methods

Modifier and Type	Method and Description
static ResolvedFieldBinding.BindResult	bind(List<Conjunct> clauses, QueryPlanNode atNode, CompositeMetadata root) Binds a list of clauses for execution at a particular query plan node
boolean	refresh(ChildDocReference ref) Attempts to refresh this binding starting at the given parent document, and ascending to its parents
static void	refresh(List<ResolvedFieldBinding> bindings, ChildDocReference ref)

Methods inherited from class java.lang.Object

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

Constructor Detail

ResolvedFieldBinding

public ResolvedFieldBinding(FieldBinding b,
                    CompositeMetadata root)

Construct a resolved field binding using the given binding and the root composite metadata

Method Detail

bind

public static ResolvedFieldBinding.BindResult bind(List<Conjunct> clauses,
                                   QueryPlanNode atNode,
                                   CompositeMetadata root)

Binds a list of clauses for execution at a particular query plan node

Parameters:

clauses - The query conjuncts that will be bound

atNode - The query plan node at which the query will be run

Returns:

Returns the binding result containing the bindings, and the query expression rewritten to be run at the given query plan node. Returns null if there are no bindings or query.

refresh

public static void refresh(List<ResolvedFieldBinding> bindings,
           ChildDocReference ref)

refresh

public boolean refresh(ChildDocReference ref)

Attempts to refresh this binding starting at the given parent document, and ascending to its parents