1 files changed, 46 insertions, 0 deletions
diff --git a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/SimpleCommandExecutor.java b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/SimpleCommandExecutor.java
new file mode 100644
index 0000000000..169654a766
--- /dev/null
+++ b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/SimpleCommandExecutor.java
@@ -0,0 +1,46 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Oracle. 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:
+ *     Oracle - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.jpt.common.utility.internal;
+
+import org.eclipse.jpt.common.utility.Command;
+
+/**
+ * Straightforward implementation of {@link StatefulCommandExecutor}.
+ */
+public class SimpleCommandExecutor
+	implements StatefulCommandExecutor
+{
+	private boolean active = false;
+
+	public SimpleCommandExecutor() {
+		super();
+	}
+
+	public void start() {
+		if (this.active) {
+			throw new IllegalStateException("Not stopped."); //$NON-NLS-1$
+		}
+		this.active = true;
+	}
+
+	public void execute(Command command) {
+		if (this.active) {
+			command.execute();
+		}
+	}
+
+	public void stop() {
+		if ( ! this.active) {
+			throw new IllegalStateException("Not started."); //$NON-NLS-1$
+		}
+		this.active = false;
+	}
+
+}