Changed DatabaseMotorFinder to have a little template pattern in it to make implementing DatabaseMotorFinderWithMissingMotors much easier.

core/src/net/sf/openrocket/file/DatabaseMotorFinder.java

@@ -16,6 +16,27 @@ import net.sf.openrocket.startup.Application;
  */
 public class DatabaseMotorFinder implements MotorFinder {
 	
+	/**
+	 * Do something when a missing motor is found.
+	 * 
+	 * This implementation adds a Warning.MissingMotor to the warning set and returns null.
+	 * 
+	 * Override this function to change the behavior.
+	 * 
+	 * @return The Motor which will be put in the Rocket.
+	 */
+	protected Motor handleMissingMotor(Type type, String manufacturer, String designation, double diameter, double length, String digest, WarningSet warnings) {
+		Warning.MissingMotor mmw = new Warning.MissingMotor();
+		mmw.setDesignation(designation);
+		mmw.setDigest(digest);
+		mmw.setDiameter(diameter);
+		mmw.setLength(length);
+		mmw.setManufacturer(manufacturer);
+		mmw.setType(type);
+		warnings.add(mmw);
+		return null;
+	}
+	
 	@Override
 	public Motor findMotor(Type type, String manufacturer, String designation, double diameter, double length, String digest, WarningSet warnings) {
 		
@@ -28,15 +49,7 @@ public class DatabaseMotorFinder implements MotorFinder {
 		
 		// No motors
 		if (motors.size() == 0) {
-			Warning.MissingMotor mmw = new Warning.MissingMotor();
+			return handleMissingMotor(type, manufacturer, designation, diameter, length, digest, warnings);
-			mmw.setDesignation(designation);
-			mmw.setDigest(digest);
-			mmw.setDiameter(diameter);
-			mmw.setLength(length);
-			mmw.setManufacturer(manufacturer);
-			mmw.setType(type);
-			warnings.add(mmw);
-			return null;
 		}		
 		
 		// One motor

core/src/net/sf/openrocket/file/DatabaseMotorFinderWithMissingMotors.java

@@ -0,0 +1,27 @@
+package net.sf.openrocket.file;
+
+import net.sf.openrocket.aerodynamics.WarningSet;
+import net.sf.openrocket.motor.Motor;
+import net.sf.openrocket.motor.Motor.Type;
+import net.sf.openrocket.motor.ThrustCurveMotorPlaceholder;
+
+public class DatabaseMotorFinderWithMissingMotors extends DatabaseMotorFinder
+implements MotorFinder {
+
+	/**
+	 * This implementation returns a ThrustCurveMotorPlaceholder.
+	 */
+	@Override
+	protected Motor handleMissingMotor(Type type, String manufacturer, String designation, double diameter, double length, String digest, WarningSet warnings) {
+		Motor motor = new ThrustCurveMotorPlaceholder(type,
+				manufacturer,
+				designation,
+				diameter,
+				length,
+				digest,
+				/* delay */ Double.NaN,
+				/*launchMass*/ Double.NaN,
+				/*emptyMass*/ Double.NaN);
+		return motor;
+	}
+}