Extend gitlab models by introducing graphql support

connector/gitlab/build.gradle

@@ -12,6 +12,11 @@ dependencies {
     api project(':blaze-query-core-api')
     api project(':blaze-query-connector-base')
     api libs.gitlab4j.api
+    api libs.jackson.annotations
+    api libs.jackson.databind
+    testImplementation project(':blaze-query-core-impl')
+    testImplementation libs.junit.jupiter
+    testImplementation libs.assertj.core
 }
 
 description = 'blaze-query-connector-gitlab'

connector/gitlab/src/main/java/com/blazebit/query/connector/gitlab/GitlabBranchRule.java

@@ -0,0 +1,41 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright Blazebit
+ */
+package com.blazebit.query.connector.gitlab;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+/**
+ * @author Martijn Sprengers
+ * @since 1.0.4
+ */
+public record GitlabBranchRule(
+		String id,
+		String name,
+		Boolean isDefault,
+		Boolean isProtected,
+		Boolean allowForcePush,
+		Boolean codeOwnerApprovalRequired
+) {
+	private static final ObjectMapper MAPPER = new ObjectMapper();
+
+	public static GitlabBranchRule fromJson(String jsonString) {
+		try {
+			JsonNode json = MAPPER.readTree(jsonString);
+			JsonNode branchProtection = json.path("branchProtection");
+
+			return new GitlabBranchRule(
+					json.get("id").asText(),
+					json.get("name").asText(),
+					json.path("isDefault").asBoolean(false),
+					json.path("isProtected").asBoolean(false),
+					branchProtection.path("allowForcePush").asBoolean(false),
+					branchProtection.path("codeOwnerApprovalRequired").asBoolean(false)
+			);
+		} catch (Exception e) {
+			throw new RuntimeException("Error parsing JSON for GitlabBranchRule", e);
+		}
+	}
+}

connector/gitlab/src/main/java/com/blazebit/query/connector/gitlab/GitlabConnectorConfig.java

@@ -20,6 +20,12 @@ public final class GitlabConnectorConfig {
 	 */
 	public static final DataFetcherConfig<GitLabApi> GITLAB_API = DataFetcherConfig.forPropertyName( "gitlabApi" );
 
+	/**
+	 * Specifies the {@link GitlabGraphQlClient} to use for querying data.
+	 */
+	public static final DataFetcherConfig<GitlabGraphQlClient> GITLAB_GRAPHQL_CLIENT =
+			DataFetcherConfig.forPropertyName("gitlabGraphQLClient");
+
 	private GitlabConnectorConfig() {
 	}
 }