add Split property to identify Split cards for Cardbuilder

src/magic/data/CardProperty.java

@@ -220,6 +220,11 @@ public enum CardProperty {
             card.setTransformCardName(value);
         }
     },
+    SPLIT() {
+      public void setProperty(final MagicCardDefinition card, final String value) {
+          card.setSplitCardName(value);
+      }
+    },
     ORACLE() {
         public void setProperty(final MagicCardDefinition card, final String value) {
             card.setText(value);

src/magic/model/MagicCard.java

@@ -172,6 +172,10 @@ public class MagicCard
         return getCardDefinition().isFlipCard();
     }
 
+    public boolean isSplitCard() {
+        return getCardDefinition().isSplitCard();
+    }
+
     public boolean isNameless() {
         return getName().isEmpty();
     }

src/magic/model/MagicCardDefinition.java

@@ -88,12 +88,14 @@ public class MagicCardDefinition implements MagicAbilityStore, IRenderableCard {
 
     private MagicCardDefinition flipCardDefinition;
     private MagicCardDefinition transformCardDefinition;
+    private MagicCardDefinition splitCardDefinition;
 
     private String abilityProperty;
     private String requiresGroovy;
     private String effectProperty;
     private String flipCardName;
     private String transformCardName;
+    private String splitCardName;
 
     public MagicCardDefinition() {
         initialize();
@@ -128,6 +130,10 @@ public class MagicCardDefinition implements MagicAbilityStore, IRenderableCard {
         transformCardName = value;
     }
 
+    public void setSplitCardName(final String value) {
+        splitCardName = value;
+    }
+
     public void setHidden() {
         hidden = true;
     }
@@ -177,6 +183,9 @@ public class MagicCardDefinition implements MagicAbilityStore, IRenderableCard {
         if (getTransformedDefinition().isHidden()) {
             transformCardDefinition.loadAbilities();
         }
+        if (getSplitDefinition() != UNKNOWN) {
+            splitCardDefinition.loadAbilities();
+        }
     }
 
     public boolean isValid() {
@@ -381,6 +390,15 @@ public class MagicCardDefinition implements MagicAbilityStore, IRenderableCard {
         return transformCardDefinition;
     }
 
+    public MagicCardDefinition getSplitDefinition() {
+        if (splitCardDefinition == null) {
+            splitCardDefinition = isSplitCard() ?
+                CardDefinitions.getMissingOrCard(splitCardName) :
+                UNKNOWN;
+        }
+        return splitCardDefinition;
+    }
+
     public MagicCardDefinition getCardDefinition() {
         return this;
     }
@@ -433,6 +451,10 @@ public class MagicCardDefinition implements MagicAbilityStore, IRenderableCard {
         return transformCardName != null;
     }
 
+    public boolean isSplitCard() {
+        return splitCardName != null;
+    }
+
     public boolean hasMultipleAspects() {
         return isFlipCard() || isDoubleFaced();
     }

src/magic/model/MagicPermanent.java

@@ -1145,6 +1145,10 @@ public class MagicPermanent extends MagicObjectImpl implements MagicSource, Magi
         return hasState(MagicPermanentState.Flipped);
     }
 
+    public boolean isSplitCard() {
+        return false;
+    }
+
     public boolean isTransformed() {
         return hasState(MagicPermanentState.Transformed);
     }

src/magic/ui/cardBuilder/IRenderableCard.java

@@ -27,6 +27,7 @@ public interface IRenderableCard {
     boolean hasType(MagicType type);
     boolean isToken();
     boolean isFlipCard();
+    boolean isSplitCard();
     boolean isDoubleFaced();
     boolean hasAbility(MagicAbility ability);
     boolean isPlaneswalker();