Module org.neo4j.cypherdsl.core

Package org.neo4j.cypherdsl.core

Interface PatternElement

All Superinterfaces:

Visitable

All Known Subinterfaces:

Node, Relationship, RelationshipPattern

All Known Implementing Classes:

NamedPath, NodeBase, QuantifiedPathPattern, QuantifiedPathPattern.TargetPattern, RelationshipBase, RelationshipChain

@API(status=STABLE,
     since="1.0")
public interface PatternElement
extends Visitable

See PatternElement.

Since:

1.0

Author:

Michael J. Simons

Method Summary

Modifier and Type	Method	Description
default @NotNull PatternElement	where(@Nullable Expression predicate)	Creates a new PatternElement which including an additional filter.

Methods inherited from interface org.neo4j.cypherdsl.core.ast.Visitable

accept, toString

Method Details

where

@Neo4jVersion(minimum="5.0")
@NotNull
@Contract(pure=true)
default @NotNull PatternElement where(@Nullable
 @Nullable Expression predicate)

Creates a new PatternElement which including an additional filter. Returns this pattern. when predicate is literal null.

The pattern might be a node pattern or a relationship pattern.

A WHERE on a pattern is only supported from Neo4j 5.0 onwards.

Parameters:

predicate - the predicate to filter on

Returns:

a new pattern element or this instance if the predicate to this method was literal null

Throws:

UnsupportedOperationException - In cases the underlying element does not support a WHERE clause

Since:

2023.9.0