iot.jcypher.query.api.predicate

Class Concat

java.lang.Object

iot.jcypher.query.api.APIObject

iot.jcypher.query.api.predicate.Concat

All Implemented Interfaces:

IBeforePredicate

public class Concat
extends APIObject
implements IBeforePredicate

Field Summary

Fields inherited from class iot.jcypher.query.api.APIObject

astNode

Method Summary

Methods

Modifier and Type	Method and Description
Concat	BR_OPEN() JCYPHER open a bracket; allows to nest expressions, must have a matching BR_CLOSE() e.g. ...
Concatenator	existsPattern(IElement X) JCYPHER matches a pattern expression against the graph.
Concatenator	has(IHas val) JCYPHER tests for existence of node labels or node/relation properties, accepts expressions like 'n.property("age")', or 'n.label("Swedish")' e.g. ...
Concatenator	holdsTrue(IPredicateFunction I) JCYPHER iterates over a collection allowing to test each element of the collection against a predicate expression Use Factory Class I to create Expressions e.g. ...
IBeforePredicate	NOT() JCYPHER negate a boolean e.g. ...
BooleanOperation	valueOf(ValueElement val) JCYPHER takes an expression like 'n.property("age")', yielding a property, or 'x.length()', calculating some value, or takes simply a reference to a value like x e.g. ...

Methods inherited from class java.lang.Object

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

Method Detail

valueOf

public BooleanOperation valueOf(ValueElement val)

Description copied from interface: IBeforePredicate

JCYPHER

takes an expression like 'n.property("age")', yielding a property,

or 'x.length()', calculating some value, or takes simply a reference to a value like x

e.g. ...valueOf(n.property("age"))...

Specified by:

valueOf in interface IBeforePredicate

has

public Concatenator has(IHas val)

Description copied from interface: IBeforePredicate

JCYPHER

tests for existence of node labels or node/relation properties,

accepts expressions like 'n.property("age")',

or 'n.label("Swedish")'

e.g. ...has(n.property("age"))

Specified by:

has in interface IBeforePredicate

NOT

public IBeforePredicate NOT()

Description copied from interface: IBeforePredicate

JCYPHER

negate a boolean

e.g. ...NOT().has(n.property("age"))

Specified by:

NOT in interface IBeforePredicate

BR_OPEN

public Concat BR_OPEN()

Description copied from interface: IBeforePredicate

JCYPHER

open a bracket; allows to nest expressions, must have a matching BR_CLOSE()

e.g. ...BR_OPEN()
.valueOf(charlie.property("lastName")).EQUALS("Sheen")
.BR_CLOSE()

Specified by:

BR_OPEN in interface IBeforePredicate

existsPattern

public Concatenator existsPattern(IElement X)

Description copied from interface: IBeforePredicate

JCYPHER

matches a pattern expression against the graph. If the result is empty, returns false, else returns true

Use Factory Class X to create Expressions

e.g. ...existsPattern(X.node(n)...)

Specified by:

existsPattern in interface IBeforePredicate

holdsTrue

public Concatenator holdsTrue(IPredicateFunction I)

Description copied from interface: IBeforePredicate

JCYPHER

iterates over a collection allowing to test each element of the collection against a predicate expression

Use Factory Class I to create Expressions

e.g. ...holdsTrue(I.forAll(n)...)

Specified by:

holdsTrue in interface IBeforePredicate