1 files changed, 64 insertions, 0 deletions
diff --git a/org.eclipse.m2e.editor/src/org/eclipse/m2e/editor/composites/ParentGatherer.java b/org.eclipse.m2e.editor/src/org/eclipse/m2e/editor/composites/ParentGatherer.java
new file mode 100644
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--- /dev/null
+++ b/org.eclipse.m2e.editor/src/org/eclipse/m2e/editor/composites/ParentGatherer.java
@@ -0,0 +1,64 @@
+/*******************************************************************************
+ * Copyright (c) 2010 Sonatype, Inc.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *      Sonatype, Inc. - initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.m2e.editor.composites;
+
+import java.util.LinkedList;
+
+import org.apache.maven.execution.MavenExecutionRequest;
+import org.apache.maven.project.MavenProject;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.m2e.core.MavenPlugin;
+import org.eclipse.m2e.core.embedder.IMaven;
+import org.eclipse.m2e.core.project.IMavenProjectFacade;
+import org.eclipse.m2e.core.project.MavenProjectManager;
+
+/**
+ * Helper class to get the parent chain given a pom 
+ */
+public class ParentGatherer {
+  private MavenProject mavenProject;
+
+  private IMavenProjectFacade projectFacade;
+
+  public ParentGatherer(MavenProject leafProject, IMavenProjectFacade facade) {
+    this.mavenProject = leafProject;
+    this.projectFacade = facade;
+  }
+
+  /**
+   * Return the list of parents for a give pom
+   * @param monitor
+   * @return list of {@link MavenProject} from the given project to its ultimate parent. 
+   * The first entry is the given pom, the last one the ultimate parent.
+   * @throws CoreException
+   */
+  public LinkedList<MavenProject> getParentHierarchy(IProgressMonitor monitor) throws CoreException {
+    LinkedList<MavenProject> hierarchy = new LinkedList<MavenProject>();
+    IMaven maven = MavenPlugin.getDefault().getMaven();
+    MavenProjectManager projectManager = MavenPlugin.getDefault().getMavenProjectManager();
+    maven.detachFromSession(mavenProject);
+
+    hierarchy.add(mavenProject);
+
+    MavenProject project = mavenProject;
+    while(project.getModel().getParent() != null) {
+      if(monitor.isCanceled()) {
+        return null;
+      }
+      MavenExecutionRequest request = projectManager.createExecutionRequest(projectFacade, monitor);
+      project = maven.resolveParentProject(request, project, monitor);
+      hierarchy.add(project);
+    }
+    return hierarchy;
+  }
+}