Package org.neo4j.cypherdsl.core

Class Operations

java.lang.Object

org.neo4j.cypherdsl.core.Operations

@API(status=STABLE,
     since="1.0")
public final class Operations
extends Object

A set of operations.

Since:

1.0

Author:

Michael J. Simons

Method Summary

Modifier and Type	Method	Description
static Operation	minus(Expression e)	Creates an unary minus operation.
static Operation	mutate(Expression target, Expression value)	Creates a += operation.
static Operation	mutate(Expression target, MapExpression value)	Creates a += operation.
static Expression	plus(Expression e)	Creates an unary plus operation.
static Operation	remove(Node target, String... label)	Creates an operation removing one or more labels from a given node.
static Operation	set(Expression target, Expression value)	Creates a = operation.
static Operation	set(Node target, String... label)	Creates an operation adding one or more labels from a given node.

Methods inherited from class java.lang.Object

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

Method Detail

minus

public static Operation minus(Expression e)

Creates an unary minus operation.

Parameters:

e - The expression to which the unary minus should be applied. We don't check if it's a numeric expression, but in hindsight to generate semantically correct Cypher, it's recommended that is one.

Returns:

An unary minus operation.

Since:

2021.2.3

plus

public static Expression plus(Expression e)

Creates an unary plus operation.

Parameters:

e - The expression to which the unary plus should be applied. We don't check if it's a numeric expression, but in hindsight to generate semantically correct Cypher, it's recommended that is one.

Returns:

An unary plus operation.

Since:

2021.2.3

set

public static Operation set(Expression target,
                            Expression value)

Creates a = operation. The left hand side should resolve to a property or to something which has labels or types to modify and the right hand side should either be new properties or labels.

Parameters:

target - The target that should be modified

value - The new value of the target

Returns:

A new operation.

Since:

2021.2.3

mutate

public static Operation mutate(Expression target,
                               MapExpression value)

Creates a += operation. The left hand side must resolve to a container (either a node or a relationship) of properties and the right hand side must be a map of new or updated properties

Parameters:

target - The target container that should be modified

value - The new properties

Returns:

A new operation.

Since:

2020.1.5

mutate

public static Operation mutate(Expression target,
                               Expression value)

Creates a += operation. The left hand side must resolve to a container (either a node or a relationship) of properties and the right hand side must be a map of new or updated properties

Parameters:

target - The target container that should be modified

value - The new properties

Returns:

A new operation.

Since:

2020.1.5

set

public static Operation set(Node target,
                            String... label)

Creates an operation adding one or more labels from a given node.

Parameters:

target - The target of the new labels

label - The labels to be added

Returns:

A set operation

Since:

2021.2.3

remove

public static Operation remove(Node target,
                               String... label)

Creates an operation removing one or more labels from a given node.

Parameters:

target - The target of the remove operation

label - The labels to be removed

Returns:

A remove operation

Since:

2021.2.3