diff --git a/docs/usage/stored-procedure.md b/docs/usage/stored-procedure.md
index a5a95b1..3305a7b 100644
--- a/docs/usage/stored-procedure.md
+++ b/docs/usage/stored-procedure.md
@@ -12,7 +12,7 @@ import fr.postgresjson.connexion.Connection
 
 val connection: Connection = TODO()
 
-val requester = Requester.RequesterFactory(
+val requester = Requester(
     connection = connection,
     functionsDirectory = this::class.java.getResource("/sql/functions")?.toURI() ?: error("No sql function found")
 ).createRequester()
diff --git a/src/main/kotlin/fr/postgresjson/connexion/EmbedExecutable.kt b/src/main/kotlin/fr/postgresjson/connexion/EmbedExecutable.kt
index cf8355b..8936b5c 100644
--- a/src/main/kotlin/fr/postgresjson/connexion/EmbedExecutable.kt
+++ b/src/main/kotlin/fr/postgresjson/connexion/EmbedExecutable.kt
@@ -4,7 +4,7 @@ import com.fasterxml.jackson.core.type.TypeReference
 import com.github.jasync.sql.db.QueryResult
 import fr.postgresjson.entity.EntityI
 
-interface EmbedExecutable {
+sealed interface EmbedExecutable {
     val connection: Connection
     override fun toString(): String
     val name: String
diff --git a/src/main/kotlin/fr/postgresjson/connexion/FunctionConverter.kt b/src/main/kotlin/fr/postgresjson/connexion/FunctionConverter.kt
new file mode 100644
index 0000000..3b53e92
--- /dev/null
+++ b/src/main/kotlin/fr/postgresjson/connexion/FunctionConverter.kt
@@ -0,0 +1,16 @@
+package fr.postgresjson.connexion
+
+import fr.postgresjson.utils.searchSqlFiles
+import java.net.URI
+import fr.postgresjson.definition.Function as DefinitionFunction
+
+fun DefinitionFunction.toConnection(connection: Connection): Function = Function(this, connection)
+
+fun Sequence<DefinitionFunction>.toConnection(connection: Connection): Sequence<Function> = map { it.toConnection(connection) }
+
+fun Sequence<Function>.toMutableMap(): MutableMap<String, Function> = map { it.name to it }.toMap().toMutableMap()
+
+internal fun URI.toFunction(connection: Connection): MutableMap<String, Function> = searchSqlFiles()
+    .filterIsInstance(DefinitionFunction::class.java)
+    .toConnection(connection)
+    .toMutableMap()
diff --git a/src/main/kotlin/fr/postgresjson/connexion/QueryConverter.kt b/src/main/kotlin/fr/postgresjson/connexion/QueryConverter.kt
new file mode 100644
index 0000000..76b0861
--- /dev/null
+++ b/src/main/kotlin/fr/postgresjson/connexion/QueryConverter.kt
@@ -0,0 +1,16 @@
+package fr.postgresjson.connexion
+
+import fr.postgresjson.utils.searchSqlFiles
+import java.net.URI
+import fr.postgresjson.definition.Query as QueryDefinition
+
+fun QueryDefinition.toConnection(connection: Connection): Query = Query(name, script, connection)
+
+fun Sequence<QueryDefinition>.toConnection(connection: Connection): Sequence<Query> = map { it.toConnection(connection) }
+
+fun Sequence<Query>.toMutableMap(): MutableMap<String, Query> = map { it.name to it }.toMap().toMutableMap()
+
+internal fun URI.toQuery(connection: Connection): MutableMap<String, Query> = searchSqlFiles()
+    .filterIsInstance(QueryDefinition::class.java)
+    .toConnection(connection)
+    .toMutableMap()
diff --git a/src/main/kotlin/fr/postgresjson/connexion/Requester.kt b/src/main/kotlin/fr/postgresjson/connexion/Requester.kt
index fbba376..664adc8 100644
--- a/src/main/kotlin/fr/postgresjson/connexion/Requester.kt
+++ b/src/main/kotlin/fr/postgresjson/connexion/Requester.kt
@@ -10,6 +10,18 @@ class Requester(
     private val queries: MutableMap<String, Query> = mutableMapOf(),
     private val functions: MutableMap<String, Function> = mutableMapOf()
 ) {
+    constructor(connection: Connection) : this(connection, mutableMapOf(), mutableMapOf())
+
+    constructor(
+        connection: Connection,
+        queriesDirectory: URI? = null,
+        functionsDirectory: URI? = null
+    ) : this(
+        connection = connection,
+        queries = queriesDirectory?.toQuery(connection) ?: mutableMapOf(),
+        functions = functionsDirectory?.toFunction(connection) ?: mutableMapOf(),
+    )
+
     fun addQuery(query: Query): Requester {
         queries[query.name] = query
         return this
@@ -72,42 +84,6 @@ class Requester(
         return queries[path]!!
     }
 
-    class RequesterFactory(
-        private val connection: Connection,
-        private val queriesDirectory: URI? = null,
-        private val functionsDirectory: URI? = null
-    ) {
-        constructor(
-            host: String = "localhost",
-            port: Int = 5432,
-            database: String,
-            username: String,
-            password: String,
-            queriesDirectory: URI? = null,
-            functionsDirectory: URI? = null
-        ) : this(
-            Connection(host = host, port = port, database = database, username = username, password = password),
-            queriesDirectory,
-            functionsDirectory
-        )
-
-        fun createRequester(): Requester {
-            return initRequester(Requester(connection))
-        }
-
-        private fun initRequester(req: Requester): Requester {
-            if (queriesDirectory !== null) {
-                req.addQuery(queriesDirectory)
-            }
-
-            if (functionsDirectory !== null) {
-                req.addFunction(functionsDirectory)
-            }
-
-            return req
-        }
-    }
-
     class NoFunctionDefined(name: String) : Exception("No function defined for $name")
     class NoQueryDefined(path: String) : Exception("No query defined in $path")
 }
diff --git a/src/main/kotlin/fr/postgresjson/definition/Parameter.kt b/src/main/kotlin/fr/postgresjson/definition/Parameter.kt
index 03fbf7f..9b97294 100644
--- a/src/main/kotlin/fr/postgresjson/definition/Parameter.kt
+++ b/src/main/kotlin/fr/postgresjson/definition/Parameter.kt
@@ -1,5 +1,7 @@
 package fr.postgresjson.definition
 
+import java.util.Locale
+
 interface ParameterI {
     val name: String
     val type: String
@@ -21,7 +23,7 @@ class Parameter(val name: String, val type: String, direction: Direction? = Dire
     constructor(name: String, type: String, direction: String? = "IN", default: Any? = null) : this(
         name = name,
         type = type,
-        direction = direction?.let { Direction.valueOf(direction.toUpperCase()) },
+        direction = direction?.let { Direction.valueOf(direction.uppercase(Locale.getDefault())) },
         default = default
     )
 
diff --git a/src/main/kotlin/fr/postgresjson/definition/Resource.kt b/src/main/kotlin/fr/postgresjson/definition/Resource.kt
index a86157a..fe34a99 100644
--- a/src/main/kotlin/fr/postgresjson/definition/Resource.kt
+++ b/src/main/kotlin/fr/postgresjson/definition/Resource.kt
@@ -4,7 +4,7 @@ import java.io.File
 import java.net.URL
 import java.nio.file.Path
 
-interface Resource {
+sealed interface Resource {
     val name: String
     val script: String
     var source: Path?
@@ -34,7 +34,3 @@ interface Resource {
             }
     }
 }
-
-interface ResourceCollection {
-    val parameters: List<Parameter>
-}
diff --git a/src/test/kotlin/fr/postgresjson/RequesterTest.kt b/src/test/kotlin/fr/postgresjson/RequesterTest.kt
index 6478da1..6aee193 100644
--- a/src/test/kotlin/fr/postgresjson/RequesterTest.kt
+++ b/src/test/kotlin/fr/postgresjson/RequesterTest.kt
@@ -24,6 +24,27 @@ class RequesterTest : TestAbstract() {
 
         assertEquals("test_function", name)
     }
+
+    @Test
+    fun `requester constructor function directory`() {
+        val resources = this::class.java.getResource("/sql/function/Test").toURI()
+        val name: String = Requester(connection, functionsDirectory = resources)
+            .getFunction("test_function")
+            .name
+
+        assertEquals("test_function", name)
+    }
+
+    @Test
+    fun `requester constructor query directory`() {
+        val resources = this::class.java.getResource("/sql/query/Test").toURI()
+        val name: String = Requester(connection, queriesDirectory = resources)
+            .getQuery("DeleteTest")
+            .name
+
+        assertEquals("DeleteTest", name)
+    }
+
     @Test
     fun `add function as string`() {
         val sql = """