From b4d46a12423301cb767ca55f137ef30e97aea04c Mon Sep 17 00:00:00 2001
From: Martin Lippert <lippertm@vmware.com>
Date: Thu, 4 Aug 2022 14:32:04 +0200
Subject: [PATCH] integrated additional reflection invocations to create
 UpdateMavenProjectJobs to be able to work with m2e 1.x and m2e 2.x at the
 same time

---
 .../boot/test/BootProjectTestHarness.java     | 38 +++++++++++++++++--
 1 file changed, 35 insertions(+), 3 deletions(-)

diff --git a/eclipse-extensions/org.springframework.ide.eclipse.boot.test/src/org/springframework/ide/eclipse/boot/test/BootProjectTestHarness.java b/eclipse-extensions/org.springframework.ide.eclipse.boot.test/src/org/springframework/ide/eclipse/boot/test/BootProjectTestHarness.java
index f1468307a..dc327e56f 100644
--- a/eclipse-extensions/org.springframework.ide.eclipse.boot.test/src/org/springframework/ide/eclipse/boot/test/BootProjectTestHarness.java
+++ b/eclipse-extensions/org.springframework.ide.eclipse.boot.test/src/org/springframework/ide/eclipse/boot/test/BootProjectTestHarness.java
@@ -15,8 +15,11 @@ import static org.junit.Assert.fail;
 import static org.springsource.ide.eclipse.commons.livexp.ui.ProjectLocationSection.getDefaultProjectLocation;
 
 import java.io.File;
+import java.lang.reflect.Constructor;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
 
@@ -359,16 +362,45 @@ public class BootProjectTestHarness {
 		boolean refreshFromLocal = true;
 		boolean cleanProjects = true;
 		boolean updateConfig = true;
-		IProject[] projects = {project};
 		boolean offline = false;
 		boolean forceUpdateDeps = true;
-		UpdateMavenProjectJob job = new UpdateMavenProjectJob(projects, offline, forceUpdateDeps,
-				updateConfig, cleanProjects, refreshFromLocal);
+
+		UpdateMavenProjectJob job = createUpdateMavenProjectJob(project, offline, forceUpdateDeps, updateConfig, cleanProjects, refreshFromLocal);
+
 		job.schedule();
 		job.join();
 //		debug("updateMavenProjectDependencies("+project.getName()+") DONE");
 	}
 
+	/**
+	 * Helper method to create the job to update maven projects.
+	 *
+	 * Due to m2e 2.0 changing the signature of the constructor (parameter from IProject[] to Collection<IProject>)
+	 * we need to call the constructor via reflection to allow this code to work with m2e 1.x and m2e 2.x at the same time
+	 */
+	private static UpdateMavenProjectJob createUpdateMavenProjectJob(IProject project, boolean offline,
+			boolean forceUpdateDeps, boolean updateConfig, boolean cleanProjects, boolean refreshFromLocal) {
+		Object args = new IProject[] {project};
+
+		try {
+			// check for m2e 1.x version (public UpdateMavenProjectJob(IProject[] projects, ...)
+			Constructor<UpdateMavenProjectJob> constructor = UpdateMavenProjectJob.class.getConstructor(
+					IProject[].class, boolean.class, boolean.class, boolean.class, boolean.class, boolean.class);
+			return constructor.newInstance(args, offline, forceUpdateDeps, updateConfig, cleanProjects, refreshFromLocal);
+		} catch (Exception e) {
+		}
+
+		try {
+			// check for m2e 2.x version (public UpdateMavenProjectJob(Collection<IProject> projects, ...)
+			Constructor<UpdateMavenProjectJob> constructor = UpdateMavenProjectJob.class.getConstructor(
+					Collection.class, boolean.class, boolean.class, boolean.class, boolean.class, boolean.class);
+			return constructor.newInstance(Collections.singleton(project), offline, forceUpdateDeps, updateConfig, cleanProjects, refreshFromLocal);
+		} catch (Exception e) {
+		}
+
+		return null;
+	}
+
 	public static IProject createPredefinedMavenProject(final String projectName, final String bundleName)
 				throws CoreException, Exception {
 			IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject(projectName);