Index: lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/ValidationErrorDTO.java
===================================================================
diff -u
--- lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/ValidationErrorDTO.java	(revision 0)
+++ lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/ValidationErrorDTO.java	(revision b5f6179d64eaea2eb06d0892c9cea39af1664575)
@@ -0,0 +1,143 @@
+package org.lamsfoundation.lams.learningdesign.dto;
+
+import org.apache.struts.util.MessageResources;
+import org.lamsfoundation.lams.learningdesign.LearningDesign;
+
+
+public class ValidationErrorDTO {
+	
+	/** Struts Message Resource related variables */
+	public static final String CONFIG_PARAM = "org.lamsfoundation.lams.applicationResources";
+	public static final String OTHER_ERROR_KEY = "validation.error.other";
+	public static final String TRANSITION_ERROR_KEY = "validation.error.transitionNoActivityBeforeOrAfter";
+	public static final String ACTIVITY_TRANSITION_ERROR_KEY= "validation.error.activityWithNoTransition";
+	public static final String INPUT_TRANSITION_ERROR_TYPE1_KEY = "validation.error.inputTransitionType1";
+	public static final String INPUT_TRANSITION_ERROR_TYPE2_KEY = "validation.error.inputTransitionType2";
+	public static final String OUTPUT_TRANSITION_ERROR_TYPE1_KEY = "validation.error.outputTransitionType1";
+	public static final String OUTPUT_TRANSITION_ERROR_TYPE2_KEY = "validation.error.outputTransitionType2";
+	public static final String GROUPING_REQUIRED_ERROR_KEY = "validation.error.GroupingRequired";
+	public static final String GROUPING_NOT_REQUIRED_ERROR_KEY = "validation.error.GroupingNotRequired";
+	public static final String GROUPING_SELECTED_ERROR_KEY = "validation.error.GroupingSelected";
+	public static final String OPTIONAL_ACTIVITY_ERROR_KEY = "validation.error.OptionalActivity";
+	public static final String OPTIONAL_ACTIVITY_ORDER_ID_INVALID_ERROR_KEY = "validation.error.OptionalActivityOrderId";
+	public static final String SCHEDULE_GATE_ERROR_TYPE1_KEY = "validation.error.illegalScheduleGateOffsetsType1";
+	public static final String SCHEDULE_GATE_ERROR_TYPE2_KEY = "validation.error.illegalScheduleGateOffsetsType2";	
+	
+	
+	
+	private static MessageResources resources = MessageResources.getMessageResources(CONFIG_PARAM);
+	/**
+	 * Rule: Other (Covers any cases that are not covered by another code)
+	 */
+	public static final String OTHER_ERROR = resources.getMessage(OTHER_ERROR_KEY);
+	
+	/**
+	 * Rule: Each transition must have an activity before and after the transition
+	 */
+	public static final String TRANSITION_ERROR = resources.getMessage(TRANSITION_ERROR_KEY);
+	
+	/**
+	 * Rule: Exactly one top level activity will have no input transition
+	 * If more than one activity is missing an input transition
+	 */
+	public static final String INPUT_TRANSITION_ERROR_TYPE1 = resources.getMessage(INPUT_TRANSITION_ERROR_TYPE1_KEY);
+	
+	/**
+	 * Rule: Exactly one top level activity will have no input transition
+	 * If no activities are missing their input transitions
+	 */
+	public static final String INPUT_TRANSITION_ERROR_TYPE2= resources.getMessage(INPUT_TRANSITION_ERROR_TYPE2_KEY);
+	
+	/**
+	 * Rule: Exactly one top level activity will have no output transition
+	 * If more than one activity is missing the output transition.
+	 */
+	public static final String OUTPUT_TRANSITION_ERROR_TYPE1 = resources.getMessage(OUTPUT_TRANSITION_ERROR_TYPE1_KEY);
+	
+	/**
+	 * Rule: Exactly one top level activity will have no output transition
+	 * If no activities are missing their output transitions.
+	 */
+	public static final String OUTPUT_TRANSITION_ERROR_TYPE2 = resources.getMessage(OUTPUT_TRANSITION_ERROR_TYPE2_KEY);
+	
+	/**
+	 * Rule: If grouping is required then a grouping must have been applied to the activity
+	 */
+	public static final String GROUPING_REQUIRED_ERROR = resources.getMessage(GROUPING_REQUIRED_ERROR_KEY);
+	
+	/**
+	 * Rule: If grouping is not supported/required, then a grouping has not been applied to the activity.
+	 */
+	public static final String GROUPING_NOT_REQUIRED_ERROR = resources.getMessage(GROUPING_NOT_REQUIRED_ERROR_KEY);
+	
+	/**
+	 * Rule: If grouping is selected, then grouping exists
+	 */
+	public static final String GROUPING_SELECTED_ERROR = resources.getMessage(GROUPING_SELECTED_ERROR_KEY);
+	
+	/**
+	 * Rule: An optional activity must contain one or more activities
+	 */
+	public static final String OPTIONAL_ACTIVITY_ERROR = resources.getMessage(OPTIONAL_ACTIVITY_ERROR_KEY);
+	
+	/**
+	 * Rule: An optional activity must have valid order ids - the order ids should be 
+	 * sequential starting at 1 and must have no duplicates.
+	 */
+	public static final String OPTIONAL_ACTIVITY_ORDER_ID_INVALID_ERROR = resources.getMessage(OPTIONAL_ACTIVITY_ORDER_ID_INVALID_ERROR_KEY);
+	
+	/**
+	 * Rule: For any learning design that has more than one activity then each activity should 
+	 * have at least one input or one output transition. 
+	 */
+	public static final String ACTIVITY_TRANSITION_ERROR = resources.getMessage(ACTIVITY_TRANSITION_ERROR_KEY);
+
+	/**
+	 * Rule: For Schedule Gates (Activity) if start and end time offsets are set they should not be equal.
+	 */
+	public static final String SCHEDULE_GATE_ERROR_TYPE1 = resources.getMessage(SCHEDULE_GATE_ERROR_TYPE1_KEY);
+	
+	
+	/**
+	 * Rule: For Schedule Gates (Activity) if start and end time offsets are set then the start time offset should be 
+	 * greater than the end time offset.
+	 */
+	public static final String SCHEDULE_GATE_ERROR_TYPE2 = resources.getMessage(SCHEDULE_GATE_ERROR_TYPE2_KEY);
+	
+	private Integer UIID;
+	private String message; //the validation message explaining what the problem is
+	
+	
+	public ValidationErrorDTO(String message, Integer UIID)
+	{
+		this.message =  message;
+		this.UIID = UIID;
+		
+		
+	}
+	
+	public ValidationErrorDTO(String message)
+	{
+		this.message = message;
+	}
+
+	public ValidationErrorDTO(LearningDesign learningDesign)
+	{
+		
+	}
+	
+	public ValidationErrorDTO()
+	{		
+	}
+	
+	
+	public String getMessage() {
+		return message;
+	}
+	public Integer getUIID() {
+		return UIID;
+	}
+	
+	
+
+}