1 files changed, 74 insertions, 0 deletions
diff --git a/org.eclipse.mylyn.tasks.core/src/org/eclipse/mylyn/internal/tasks/core/operations/TaskListOperation.java b/org.eclipse.mylyn.tasks.core/src/org/eclipse/mylyn/internal/tasks/core/operations/TaskListOperation.java
new file mode 100644
index 000000000..42a73f20b
--- /dev/null
+++ b/org.eclipse.mylyn.tasks.core/src/org/eclipse/mylyn/internal/tasks/core/operations/TaskListOperation.java
@@ -0,0 +1,74 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Tasktop Technologies and others.
+ * 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:
+ *     Tasktop Technologies - initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.mylyn.internal.tasks.core.operations;
+
+import java.lang.reflect.InvocationTargetException;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.OperationCanceledException;
+import org.eclipse.core.runtime.SubProgressMonitor;
+import org.eclipse.core.runtime.jobs.ISchedulingRule;
+import org.eclipse.core.runtime.jobs.Job;
+import org.eclipse.mylyn.internal.tasks.core.ITaskListRunnable;
+import org.eclipse.mylyn.internal.tasks.core.TaskList;
+
+public abstract class TaskListOperation {
+
+	private final ISchedulingRule rule;
+
+	private final TaskList taskList;
+
+	public TaskListOperation(TaskList taskList) {
+		this(null, taskList);
+	}
+
+	public TaskListOperation(ISchedulingRule rule, TaskList taskList) {
+		this.rule = rule;
+		this.taskList = taskList;
+	}
+
+	protected abstract void operations(IProgressMonitor monitor)
+			throws CoreException, InvocationTargetException, InterruptedException;
+
+	final public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
+		final InvocationTargetException[] ite = new InvocationTargetException[1];
+		try {
+			ITaskListRunnable runnable = new ITaskListRunnable() {
+
+				public void execute(IProgressMonitor monitor) throws CoreException {
+					try {
+						Job.getJobManager().beginRule(rule, new SubProgressMonitor(monitor, IProgressMonitor.UNKNOWN));
+						operations(monitor);
+					} catch (InvocationTargetException e) {
+						ite[0] = e;
+					} catch (InterruptedException e) {
+						throw new OperationCanceledException(e.getMessage());
+					} finally {
+						Job.getJobManager().endRule(rule);
+					}
+				}
+			};
+			getTaskList().run(runnable, monitor);
+		} catch (CoreException e) {
+			throw new InvocationTargetException(e);
+		}
+
+		if (ite[0] != null) {
+			throw ite[0];
+		}
+	}
+
+	protected TaskList getTaskList() {
+		return taskList;
+	}
+}