iot.jcypher.query.factories.clause

Class WHERE

java.lang.Object

iot.jcypher.query.factories.clause.WHERE

public class WHERE
extends Object

JCYPHER CLAUSE

Constructor Summary

Constructors

Constructor and Description
WHERE()

Method Summary

Methods

Modifier and Type	Method and Description
static Concat	BR_OPEN() JCYPHER open a bracket; allows to nest expressions, must have a matching BR_CLOSE() e.g.
static Concatenator	existsPattern(IElement X) JCYPHER matches a pattern expression against the graph.
static 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.
static 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. ...
static IBeforePredicate	NOT() JCYPHER negate a boolean e.g.
static BooleanOperation	valueOf(ValueElement val) JCYPHER takes an expression like 'n.property("age")', yielding a property, or 'x.length()', calculating some value e.g.

Methods inherited from class java.lang.Object

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

Constructor Detail

WHERE

public WHERE()

Method Detail

valueOf

public static BooleanOperation valueOf(ValueElement val)

JCYPHER

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

or 'x.length()', calculating some value

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

has

public static 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. WHERE.has(n.property("age"))

NOT

public static IBeforePredicate NOT()

JCYPHER

negate a boolean

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

BR_OPEN

public static Concat BR_OPEN()

JCYPHER

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

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

existsPattern

public static Concatenator existsPattern(IElement X)

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)...)

holdsTrue

public static 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. ...holdsTrue(I.forAll(n)...)