src/main/kotlin/fr/postgresjson/functionGenerator/FunctionGenerator.kt

@@ -35,6 +35,7 @@ class FunctionGenerator(private val functionsDirectories: List<URI>) {
                 base + default
             }
     }
+
     private fun List<Parameter>.toMapOf(): String {
         return filter { it.direction == IN || it.direction == INOUT }
             .joinToString(", ", prefix = "mapOf(", postfix = ")") { """"${it.kotlinName}" to ${it.kotlinName}""" }
@@ -49,6 +50,7 @@ class FunctionGenerator(private val functionsDirectories: List<URI>) {
                 "character" -> "String"
                 "char" -> "String"
                 "int" -> "Int"
+                "float" -> "Float"
                 "boolean" -> "Boolean"
                 "json" -> "S"
                 "jsonb" -> "S"
@@ -69,45 +71,68 @@ class FunctionGenerator(private val functionsDirectories: List<URI>) {
             return name.toCamelCase().trimStart('_')
         }
 
+    private val functions: List<Function>
+        get() = functionsDirectories
+            .flatMap { it.searchSqlFiles() }
+            .filterIsInstance<Function>()
+
     fun generate(outputDirectory: URI) {
         File(outputDirectory.path).apply {
             logger.debug("Create Directory: $absolutePath")
             mkdirs()
         }
 
-        this.functionsDirectories
+        functions
-            .flatMap { it.searchSqlFiles() }
+            .map { function ->
-            .filterIsInstance<Function>()
+                File("${outputDirectory.path}${function.kotlinName}.kt").apply {
-            .map { it.run {
+                    writeText(generate(function))
+                }
+            }
+    }
+
+    fun generate(functionName: String): String {
+        return functions
+            .first { it.name == functionName }
+            .let { generate(it) }
+    }
+
+    fun generate(function: Function): String = function.run {
         val args = parameters.toKotlinArgs()
 
-                File("${outputDirectory.path}${kotlinName}.kt").apply {
+        val hasInputArgs: Boolean = parameters.filter { it.direction != OUT }.any { it.kotlinType == "S" }
-                    logger.debug("Create kotlin file: $absolutePath")
+        val hasReturn: Boolean = parameters.any { it.direction != IN } || (returns != "" && returns != "void")
-                    val hasGenerics: Boolean = parameters.filter { it.direction != OUT }.any { it.kotlinType == "S" }
-                    val genericsType = if (hasGenerics) ", S: Serializable" else ""
 
-                    val hasReturn = parameters.any { it.direction != IN } || (it.returns != "" && it.returns != "void")
+        val generics = mutableListOf<String>()
-                    val returnTypeGenerics = if (hasReturn) "reified E: EntityI" else ""
+        if (hasReturn) generics.add("reified E: Any?")
-                    val returnType = if (hasReturn) ": List<E>" else ""
+        if (hasInputArgs) generics.add("S: Serializable")
-                    val returnWord = if (hasReturn) "return " else ""
-                    val select = if (hasReturn) "select<E>" else "exec"
-                    val function = if (hasGenerics || hasReturn) """inline fun <$returnTypeGenerics$genericsType>""" else "fun"
 
-                    val importEntityI = if (hasReturn) "import fr.postgresjson.entity.EntityI\n" else ""
+        val functionDecl = if (generics.isNotEmpty()) "inline fun <${generics.joinToString(", ")}>" else "fun"
-                    val importSerializable = if (hasGenerics) "import fr.postgresjson.entity.Serializable\n" else ""
-                    val importSelect = if (hasReturn) "import fr.postgresjson.connexion.select\n" else ""
 
-                    writeText("""
+        val importSerializable = if (hasInputArgs) "import fr.postgresjson.entity.Serializable\n" else ""
+
+        if (hasReturn) {
+            return """
+            |package fr.postgresjson.functionGenerator.generated
+            |
+            |import com.fasterxml.jackson.core.type.TypeReference
+            |import fr.postgresjson.connexion.Requester
+            |$importSerializable
+            |$functionDecl Requester.$kotlinName($args): E {
+            |    return getFunction("$name")
+            |        .selectAny<E>(object : TypeReference<E>() {}, ${parameters.toMapOf()})
+            |}
+        """.trimMargin()
+        } else {
+            return """
             |package fr.postgresjson.functionGenerator.generated
             |
             |import fr.postgresjson.connexion.Requester
-                    |$importSelect$importSerializable$importEntityI
+            |$importSerializable
-                    |$function Requester.$kotlinName($args)$returnType {
+            |$functionDecl Requester.$kotlinName($args): Unit {
-                    |    ${returnWord}getFunction("${it.name}")
+            |    getFunction("$name")
-                    |        .$select(${parameters.toMapOf()})
+            |        .exec(${parameters.toMapOf()})
             |}
-                    """.trimMargin())
+        """.trimMargin()
-                }}
         }
     }
 }

src/test/kotlin/fr/postgresjson/TestAbstract.kt

@@ -8,8 +8,8 @@ import org.junit.jupiter.api.TestInstance.Lifecycle.PER_CLASS
 import java.io.File
 
 @TestInstance(PER_CLASS)
-abstract class TestAbstract {
+open class TestAbstract {
-    protected val connection = Connection(database = "json_test", username = "test", password = "test", port = 5555)
+    protected val connection = Connection(database = "json_test", username = "test", password = "test", port = 35555)
 
     @BeforeEach
     fun beforeAll() {

src/test/kotlin/fr/postgresjson/functionGenerator/FunctionGeneratorTest.kt

@@ -1,14 +1,103 @@
 package fr.postgresjson.functionGenerator
 
-import java.net.URI
+import fr.postgresjson.definition.Function
+import kotlin.test.assertEquals
 import org.junit.jupiter.api.Test
 
 class FunctionGeneratorTest {
+    private val functionDirectory = this::class.java.getResource("/sql/function/Test")!!.toURI()
+    private val generator = FunctionGenerator(functionDirectory)
 
     @Test
-    fun generate() {
+    fun `generate function`() {
-        val functionDirectory = this::class.java.getResource("/sql/function/Test")!!.toURI()
+        val functionSql = """
-        FunctionGenerator(functionDirectory)
+            |create or replace function test_function_object (inout resource json)
-            .generate(URI( "./src/test/kotlin/fr/postgresjson/functionGenerator/generated/"))
+            |language plpgsql
+            |as
+            |$$
+            |begin
+            |    resource = json_build_object('id', '1e5f5d41-6d14-4007-897b-0ed2616bec96', 'name', 'changedName');
+            |end;
+            |$$
+        """.trimMargin()
+
+        val expectedGenerated = """
+            |package fr.postgresjson.functionGenerator.generated
+            |
+            |import com.fasterxml.jackson.core.type.TypeReference
+            |import fr.postgresjson.connexion.Requester
+            |import fr.postgresjson.entity.Serializable
+            |
+            |inline fun <reified E: Any?, S: Serializable> Requester.testFunctionObject(resource: S): E {
+            |    return getFunction("test_function_object")
+            |        .selectAny<E>(object : TypeReference<E>() {}, mapOf("resource" to resource))
+            |}
+        """.trimMargin()
+
+        val generated: String = generator.generate(Function(functionSql))
+
+        assertEquals(expectedGenerated, generated)
+    }
+
+    @Test
+    fun `generate function with return void`() {
+        val functionSql = """
+            |create or replace function test_function_void (name text default 'plop') returns void
+            |language plpgsql
+            |as
+            |$$
+            |begin
+            |    perform 1;
+            |end;
+            |$$;
+        """.trimMargin()
+
+        val expectedGenerated = """
+            |package fr.postgresjson.functionGenerator.generated
+            |
+            |import fr.postgresjson.connexion.Requester
+            |
+            |fun Requester.testFunctionVoid(name: String = "plop"): Unit {
+            |    getFunction("test_function_void")
+            |        .exec(mapOf("name" to name))
+            |}
+        """.trimMargin()
+
+        val generated: String = generator.generate(Function(functionSql))
+
+        assertEquals(expectedGenerated, generated)
+    }
+
+    @Test
+    fun `generate function with multiple args and defaults`() {
+        val functionSql = """
+            |create or replace function test_function_multiple (name text default 'plop', in hi text default 'hello', out result json)
+            |language plpgsql
+            |as
+            |$$
+            |begin
+            |    result = json_build_array(
+            |        json_build_object('id', '457daad5-4f1b-4eb7-80ec-6882adb8cc7d', 'name', name),
+            |        json_build_object('id', '8d20abb0-7f77-4b6c-9991-44acd3c88faa', 'name', hi)
+            |    );
+            |end;
+            |$$
+        """.trimMargin()
+
+        val expectedGenerated = """
+            |package fr.postgresjson.functionGenerator.generated
+            |
+            |import com.fasterxml.jackson.core.type.TypeReference
+            |import fr.postgresjson.connexion.Requester
+            |
+            |inline fun <reified E: Any?> Requester.testFunctionMultiple(name: String = "plop", hi: String = "hello"): E {
+            |    return getFunction("test_function_multiple")
+            |        .selectAny<E>(object : TypeReference<E>() {}, mapOf("name" to name, "hi" to hi))
+            |}
+        """.trimMargin()
+
+        val generated: String = generator.generate(Function(functionSql))
+
+        assertEquals(expectedGenerated, generated)
     }
 }