From 091a65b283c2326acebda3a21d444aa248b22481 Mon Sep 17 00:00:00 2001
From: Andreas Motl <andreas.motl@crate.io>
Date: Fri, 20 Jan 2023 17:25:06 +0100
Subject: [PATCH] Java/jOOQ: Add jOOQ code generation add-on for Gradle

---
 by-language/java-jooq/README.rst   |  9 ++-
 by-language/java-jooq/build.gradle |  3 +
 by-language/java-jooq/jooq.gradle  | 89 ++++++++++++++++++++++++++++++
 3 files changed, 96 insertions(+), 5 deletions(-)
 create mode 100644 by-language/java-jooq/jooq.gradle

diff --git a/by-language/java-jooq/README.rst b/by-language/java-jooq/README.rst
index c39e5b61..628cd431 100644
--- a/by-language/java-jooq/README.rst
+++ b/by-language/java-jooq/README.rst
@@ -46,11 +46,6 @@ builder without code generation`_.
 Caveats
 =======
 
-- `jOOQ's code generator`_ takes your database schema and reverse-engineers it
-  into a set of Java classes. This feature currently does not work with CrateDB
-  yet. The code provided within the ``src/generated`` directory has not been
-  derived by reflecting the database schema from CrateDB.
-
 - Most of the jOOQ examples use uppercase letters for the database, table, and
   field names. CrateDB currently only handles lowercase letters.
 
@@ -73,6 +68,10 @@ Usage
 
     ./gradlew test
 
+4. Generate the jOOQ sources from the main jOOQ configuration, see ``jooq.gradle``::
+
+    ./gradlew generateJooq
+
 
 .. _CrateDB: https://github.com/crate/crate
 .. _Different use cases for jOOQ: https://www.jooq.org/doc/latest/manual/getting-started/use-cases/
diff --git a/by-language/java-jooq/build.gradle b/by-language/java-jooq/build.gradle
index cb17902b..871a3b55 100644
--- a/by-language/java-jooq/build.gradle
+++ b/by-language/java-jooq/build.gradle
@@ -56,6 +56,9 @@ test {
     dependsOn 'cleanTest'
 }
 
+// Activate jOOQ code generation add-on.
+apply from: 'jooq.gradle'
+
 idea.module.inheritOutputDirs = true
 processResources.destinationDir = compileJava.destinationDir
 compileJava.dependsOn processResources
diff --git a/by-language/java-jooq/jooq.gradle b/by-language/java-jooq/jooq.gradle
new file mode 100644
index 00000000..18383ce3
--- /dev/null
+++ b/by-language/java-jooq/jooq.gradle
@@ -0,0 +1,89 @@
+/**
+ * About
+ * =====
+ *
+ * Configure `gradle-jooq-plugin`, a Gradle plugin that integrates the jOOQ
+ * code generation tool. This layout manages the jOOQ configuration within
+ * a separate script file.
+ *
+ * Synopsis
+ * ========
+ *
+ *     ./gradlew generateJooq
+ *
+ * Resources
+ * =========
+ *
+ * - https://github.com/etiennestuder/gradle-jooq-plugin#gradle-groovy-dsl-4
+ * - https://github.com/etiennestuder/gradle-jooq-plugin/tree/main/example/extract_script_file
+ * - https://github.com/etiennestuder/gradle-jooq-plugin#examples
+ */
+
+buildscript {
+    repositories {
+        gradlePluginPortal()
+    }
+    dependencies {
+        classpath 'nu.studer:gradle-jooq-plugin:8.1'
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+apply plugin: nu.studer.gradle.jooq.JooqPlugin
+
+dependencies {
+    jooqGenerator 'org.postgresql:postgresql:42.5.1'
+}
+
+jooq {
+
+    // Defaults (can be omitted).
+    // version = '3.17.6'
+    // edition = nu.studer.gradle.jooq.JooqEdition.OSS
+
+    configurations {
+        // Name of the jOOQ configuration.
+        main {
+
+            // Do not *automatically* generate code.
+            generateSchemaSourceOnCompilation = false
+            
+            generationTool {
+                logging = org.jooq.meta.jaxb.Logging.WARN
+                jdbc {
+                    driver = 'org.postgresql.Driver'
+                    url = 'jdbc:postgresql://localhost:5432/testdrive'
+                    user = 'crate'
+                    password = ''
+                    properties {
+                        property {
+                            key = 'PAGE_SIZE'
+                            value = 2048
+                        }
+                    }
+                }
+                generator {
+                    name = 'org.jooq.codegen.DefaultGenerator'
+                    database {
+                        name = 'org.jooq.meta.postgres.PostgresDatabase'
+                        inputSchema = 'testdrive'
+                    }
+                    generate {
+                        deprecated = false
+                        records = false
+                        immutablePojos = false
+                        fluentSetters = false
+                    }
+                    target {
+                        packageName = 'io.crate.demo.jooq.model'
+                        directory = 'src/generated/java'
+                    }
+                    strategy.name = "org.jooq.codegen.DefaultGeneratorStrategy"
+                }
+            }
+        }
+    }
+}