Ignore the unsupported java versions when auto detecting the installed jdks (#3258)

Author: testforstephen

src/extension.ts

@@ -35,6 +35,7 @@ import { Telemetry } from './telemetry';
 import { getMessage } from './errorUtils';
 import { TelemetryService } from '@redhat-developer/vscode-redhat-telemetry/lib';
 import { activationProgressNotification } from "./serverTaskPresenter";
+import { loadSupportedJreNames } from './jdkUtils';
 
 const syntaxClient: SyntaxLanguageClient = new SyntaxLanguageClient();
 const standardClient: StandardLanguageClient = new StandardLanguageClient();
@@ -81,7 +82,8 @@ function getHeapDumpFolderFromSettings(): string {
 }
 
 
-export function activate(context: ExtensionContext): Promise<ExtensionAPI> {
+export async function activate(context: ExtensionContext): Promise<ExtensionAPI> {
+	await loadSupportedJreNames(context);
 	context.subscriptions.push(markdownPreviewProvider);
 	context.subscriptions.push(commands.registerCommand(Commands.TEMPLATE_VARIABLES, async () => {
 		markdownPreviewProvider.show(context.asAbsolutePath(path.join('document', `${Commands.TEMPLATE_VARIABLES}.md`)), 'Predefined Variables', "", context);

src/jdkUtils.ts

@@ -1,8 +1,20 @@
 'use strict';
 
 import { IJavaRuntime, findRuntimes, getSources } from 'jdk-utils';
+import { ExtensionContext, Uri, workspace } from 'vscode';
 
 let cachedJdks: IJavaRuntime[];
+let cachedJreNames: string[];
+
+export async function loadSupportedJreNames(context: ExtensionContext): Promise<void> {
+	const buffer = await workspace.fs.readFile(Uri.file(context.asAbsolutePath("package.json")));
+	const packageJson = JSON.parse(buffer.toString());
+	cachedJreNames = packageJson?.contributes?.configuration?.properties?.["java.configuration.runtimes"]?.items?.properties?.name?.enum;
+}
+
+export function getSupportedJreNames(): string[] {
+	return cachedJreNames;
+}
 
 export async function listJdks(force?: boolean): Promise<IJavaRuntime[]> {
 	if (force || !cachedJdks) {

src/utils.ts

@@ -5,7 +5,7 @@ import * as path from 'path';
 import { workspace, WorkspaceConfiguration, commands, Uri, version } from 'vscode';
 import { Commands } from './commands';
 import { IJavaRuntime } from 'jdk-utils';
-import { listJdks, sortJdksBySource, sortJdksByVersion } from './jdkUtils';
+import { getSupportedJreNames, listJdks, sortJdksBySource, sortJdksByVersion } from './jdkUtils';
 
 export function getJavaConfiguration(): WorkspaceConfiguration {
 	return workspace.getConfiguration('java');
@@ -228,6 +228,7 @@ async function addAutoDetectedJdks(configuredJREs: any[]): Promise<any[]> {
 	sortJdksByVersion(autoDetectedJREs);
 	sortJdksBySource(autoDetectedJREs);
 	const addedJreNames: Set<string> = new Set<string>();
+	const supportedJreNames: string[] = getSupportedJreNames();
 	for (const jre of configuredJREs) {
 		if (jre.name) {
 			addedJreNames.add(jre.name);
@@ -246,7 +247,7 @@ async function addAutoDetectedJdks(configuredJREs: any[]): Promise<any[]> {
 			jreName = `JavaSE-1.${majorVersion}`;
 		}
 
-		if (addedJreNames.has(jreName)) {
+		if (addedJreNames.has(jreName) || !supportedJreNames?.includes(jreName)) {
 			continue;
 		}