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https://github.com/neo4j/cypher-dsl

A Java DSL (Builder) for the Cypher Query Language
https://github.com/neo4j/cypher-dsl

builder cypher cypher-builder cypher-query-language dsl java java-dsl neo4j

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A Java DSL (Builder) for the Cypher Query Language

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= The Neo4j Cypher-DSL

:sectanchors:



// tag::properties[]

:groupId: org.neo4j

:artifactId: neo4j-cypher-dsl



// This will be next version and also the one that will be put into the manual for the main branch

:neo4j-cypher-dsl-version: 2024.1.0-SNAPSHOT

// This is the latest released version, used only in the readme

:neo4j-cypher-dsl-version-latest: 2024.0.2



// end::properties[]



image:https://github.com/neo4j-contrib/cypher-dsl/workflows/build/badge.svg[link=https://github.com/neo4j-contrib/cypher-dsl/actions]

image:https://sonarcloud.io/api/project_badges/measure?project=org.neo4j%3Aneo4j-cypher-dsl-parent&metric=coverage[link=https://sonarcloud.io/summary/new_code?id=org.neo4j%3Aneo4j-cypher-dsl-parent]

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image:https://maven-badges.herokuapp.com/maven-central/org.neo4j/neo4j-cypher-dsl/badge.svg[Maven Central,link=http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.neo4j%22%20AND%20a%3A%22neo4j-cypher-dsl%22]



[abstract]

--

The Neo4j Cypher-DSL in its current form is a spin-off from Spring Data Neo4j 6+ (né Spring Data Neo4j⚡️RX), where it is used to generate all Cypher queries.

We thank all contributors to all branches prior to 2020.0 for their effort in creating the previous versions.

--



The primary goal of this project is to have a type safe way of creating Cypher queries targeted at https://neo4j.com[Neo4j 4.0+].

Most of the constructs used here are modelled after https://www.opencypher.org[openCypher], but we include several constructs specific to Neo4j.



The core module of the Neo4j Cypher-DSL has no required runtime dependencies.



== Versioning



This rebooted version of the Neo4j Cypher-DSL uses https://calver.org[CalVer] in the same way Spring does

since early 2020 (see https://spring.io/blog/2020/04/30/updates-to-spring-versions[Updates to Spring Versions]),

starting at _2020.0.0_.



The year digit is treated in a semver fashion for the core module.

That means that you won't experience any breaking changes when staying in a release line.

However, the first or the latest release in a given year does not necessarily reflect the current calendar year.

It's kind of a trade-off, but one that we think is valuable, otherwise we would need to postpone the first release in a year until we need todo some breaking changes.



== Manual



For a gentle introduction and some getting started guides, please use our

https://neo4j.github.io/cypher-dsl[Manual].



== Getting Started



=== Adding the necessary dependencies



First, include the dependency to the Neo4j Cypher-DSL under the following coordinates: `{groupId}:{artifactId}`:



==== Maven configuration



[source,xml,subs="verbatim,attributes"]

.Inclusion of the Neo4j Cypher-DSL in a Maven project

----



	{groupId}

	{artifactId}

	{neo4j-cypher-dsl-version-latest}



----



==== Gradle configuration



[source,groovy,subs="verbatim,attributes"]

.Inclusion of the Neo4j Cypher-DSL in a Gradle project

----

dependencies {

    compile '{groupId}:{artifactId}:{neo4j-cypher-dsl-version-latest}'

}

----



=== A simple example



With the Cypher-DSL, you can build your queries starting with the static methods provided through `org.neo4j.cypherdsl.core.Cypher`.

Static imports for those packages should be allowed:



[source,java,tabsize=4]

----

import static org.neo4j.cypherdsl.core.Cypher.*;



import org.neo4j.cypherdsl.core.Cypher;



class SimpleExample {



	public static void main(String... a) {



		var m = node("Movie").named("m");

		var statement = Cypher.match(m)

			.returning(m)

			.build();



		System.out.println(statement.getCypher());

		// Prints MATCH (m:`Movie`) RETURN m

	}

}

----



=== Required Java Version



From version 2023.0.0 onwards, the minimal required Java version to use and build the Cypher-DSL is *Java 17*. If you need a version that is compatible with Java 8, please use 2022.8.x.



== Licensing



The Cypher-DSL itself is licenced under the https://www.apache.org/licenses/LICENSE-2.0[Apache License 2.0].