iot.jcypher.query.api.collection

Class Collection

java.lang.Object

iot.jcypher.query.api.APIObject

iot.jcypher.query.api.collection.Collection

public class Collection
extends APIObject

Field Summary

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

astNode

Method Summary

Methods

Modifier and Type	Method and Description
EXProperty<CollectFrom>	COLLECT() JCYPHER collect properties from a collection of property containers (nodes or relations) e.g. ...
ExtractExpression	EXTRACT() JCYPHER go through a collection, run an expression on every element of the collection, and return the results as a collection of these values e.g. ...
CFrom<CWhere>	FILTER() JCYPHER return all the elements in a collection that hold true for a predicate expression e.g. ...
CFrom<ReduceTo>	REDUCE() JCYPHER run an expression against individual elements of a collection and store the result of the expression in an accumulator e.g. ...
Collection	TAIL() JCYPHER return all but the first element in a collection e.g. ...
CTerminal	TAIL(JcCollection collection) JCYPHER return all but the first element in a collection e.g. ...

Methods inherited from class java.lang.Object

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

Method Detail

COLLECT

public EXProperty<CollectFrom> COLLECT()

JCYPHER

collect properties from a collection of property containers (nodes or relations)

e.g. ...COLLECT().property("name").from(p.nodes())

EXTRACT

public ExtractExpression EXTRACT()

JCYPHER

go through a collection, run an expression on every element of the collection,
and return the results as a collection of these values

e.g. ...EXTRACT().valueOf(n.numberProperty("age").div(2)).fromAll(n).IN_nodes(p)

FILTER

public CFrom<CWhere> FILTER()

JCYPHER

return all the elements in a collection that hold true for a predicate expression

e.g. ...FILTER().fromAll(x).IN(a.collectionProperty("array")).WHERE()...

REDUCE

public CFrom<ReduceTo> REDUCE()

JCYPHER

run an expression against individual elements of a collection
and store the result of the expression in an accumulator

e.g. ...REDUCE().fromAll(n).IN_nodes(p).to(totalAge).by(totalAge.plus(n.numberProperty("age"))).startWith(0)

TAIL

public Collection TAIL()

JCYPHER

return all but the first element in a collection

e.g. ...TAIL().FILTER()...

TAIL

public CTerminal TAIL(JcCollection collection)

JCYPHER

return all but the first element in a collection

e.g. ...TAIL(p.nodes())