Wire in visitors to RocketComponent. Added some abstract

implementations of RocketComponentVisitior which provide for recursive
actions.

core/src/net/sf/openrocket/rocketcomponent/RocketComponent.java

@@ -23,7 +23,7 @@ import net.sf.openrocket.util.SimpleStack;
 import net.sf.openrocket.util.UniqueID;
 
 
-public abstract class RocketComponent implements ChangeSource, Cloneable, Iterable<RocketComponent> {
+public abstract class RocketComponent implements ChangeSource, Cloneable, Iterable<RocketComponent>, Visitable<RocketComponentVisitor,RocketComponent> {
 	private static final LogHelper log = Application.getLogger();
 	private static final Translator trans = Application.getTranslator();
 	
@@ -1691,7 +1691,11 @@ public abstract class RocketComponent implements ChangeSource, Cloneable, Iterab
 		return id.hashCode();
 	}
 	
-	
+	///////////// Visitor pattern implementation
+	@Override
+	public void accept(RocketComponentVisitor visitor) {
+		visitor.visit(this);
+	}
 
 	////////////  Helper methods for subclasses
 	

core/src/net/sf/openrocket/rocketcomponent/RocketComponentVisitor.java

@@ -0,0 +1,5 @@
+package net.sf.openrocket.rocketcomponent;
+
+public interface RocketComponentVisitor extends Visitor<RocketComponentVisitor, RocketComponent> {
+	
+}

core/src/net/sf/openrocket/rocketvisitors/BredthFirstRecusiveVisitor.java

@@ -0,0 +1,21 @@
+package net.sf.openrocket.rocketvisitors;
+
+import net.sf.openrocket.rocketcomponent.RocketComponent;
+import net.sf.openrocket.rocketcomponent.RocketComponentVisitor;
+
+public abstract class BredthFirstRecusiveVisitor implements RocketComponentVisitor {
+
+	@Override
+	public final void visit(RocketComponent visitable) {
+
+		for ( RocketComponent child: visitable.getChildren() ) {
+			this.visit(child);
+		}
+		
+		this.doAction(visitable);
+		
+	}
+	
+	protected abstract void doAction( RocketComponent visitable );
+
+}

core/src/net/sf/openrocket/rocketvisitors/DepthFirstRecusiveVisitor.java

@@ -0,0 +1,21 @@
+package net.sf.openrocket.rocketvisitors;
+
+import net.sf.openrocket.rocketcomponent.RocketComponent;
+import net.sf.openrocket.rocketcomponent.RocketComponentVisitor;
+
+public abstract class DepthFirstRecusiveVisitor implements RocketComponentVisitor {
+
+	@Override
+	public final void visit(RocketComponent visitable) {
+
+		this.doAction(visitable);
+		
+		for ( RocketComponent child: visitable.getChildren() ) {
+			this.visit(child);
+		}
+		
+	}
+	
+	protected abstract void doAction( RocketComponent visitable );
+
+}