com.edorasware.commons.core.query.entity

Class HierarchyOperand<T extends HierarchicalEntityId>

java.lang.Object

com.edorasware.commons.core.query.entity.HierarchyOperand<T>

public final class HierarchyOperand<T extends HierarchicalEntityId>
extends Object

An operand implementation which builds Predicate instances through hierarchy-specific operators.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	HierarchyOperand.PathElementReferenceValue
static class	HierarchyOperand.PathIdsReferenceValue

Constructor Summary

Constructors

Constructor and Description
HierarchyOperand(QueryParameter pathQueryParameter, QueryParameter parentQueryParameter, QueryParameter idQueryParameter) Creates a new operand instance.

Method Summary

Modifier and Type	Method and Description
Predicate	childOf(T expectedId) Builds a predicate representing queryParameter child of expectedId comparison.
Predicate	childrenOf(Collection<? extends T> expectedIds) Builds a predicate representing queryParameter child of any of expectedIds comparison.
Predicate	descendantOf(T expectedId) Builds a predicate representing queryParameter descendant of expectedId comparison.
Predicate	descendantOfOrEq(List<? extends T> expectedPathIds) Builds a predicate representing queryParameter descendant of expectedPathIds or queryParameter = expectedPathIds comparison.
Predicate	descendantOfOrEq(T expectedId) Builds a predicate representing queryParameter descendant of expectedId or queryParameter = expectedId comparison.

Methods inherited from class java.lang.Object

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

Constructor Detail

HierarchyOperand

public HierarchyOperand(QueryParameter pathQueryParameter,
                        QueryParameter parentQueryParameter,
                        QueryParameter idQueryParameter)

Creates a new operand instance.

Parameters:

pathQueryParameter - the left operand for all path predicates to be built

parentQueryParameter - the left operand for all parent predicates to be built

idQueryParameter - the left operand of the predicate to be built for the inner select statement that determines the path of a given root object

Method Detail

descendantOf

public Predicate descendantOf(T expectedId)

Builds a predicate representing queryParameter descendant of expectedId comparison.

Parameters:

expectedId - the expected id of the comparison, i.e. the id expected to be the (direct or indirect) parent

Returns:

the new predicate instance

descendantOfOrEq

public Predicate descendantOfOrEq(T expectedId)

Builds a predicate representing queryParameter descendant of expectedId or queryParameter = expectedId comparison.

Parameters:

expectedId - the expected id of the comparison, i.e. the id expected to be the (direct or indirect) parent or the element itself

Returns:

the new predicate instance

descendantOfOrEq

public Predicate descendantOfOrEq(List<? extends T> expectedPathIds)

Builds a predicate representing queryParameter descendant of expectedPathIds or queryParameter = expectedPathIds comparison.

Parameters:

expectedPathIds - the expected path ids of the comparison, i.e. the path ids expected to be the (direct or indirect) parent or the element itself

Returns:

the new predicate instance

childOf

public Predicate childOf(T expectedId)

Builds a predicate representing queryParameter child of expectedId comparison.

Parameters:

expectedId - the expected id of the comparison, i.e. the id expected to be the direct parent

Returns:

the new predicate instance

childrenOf

public Predicate childrenOf(Collection<? extends T> expectedIds)

Builds a predicate representing queryParameter child of any of expectedIds comparison.

Parameters:

expectedIds - the possible expected ids, i.e. one of the ids expected to be the direct parent

Returns:

the new predicate instance