Added CanAttackOnlyAloneAbility.

Mage/src/mage/abilities/keyword/CanAttackOnlyAloneAbility.java

@@ -0,0 +1,65 @@
+/*
+* Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without modification, are
+* permitted provided that the following conditions are met:
+*
+*    1. Redistributions of source code must retain the above copyright notice, this list of
+*       conditions and the following disclaimer.
+*
+*    2. Redistributions in binary form must reproduce the above copyright notice, this list
+*       of conditions and the following disclaimer in the documentation and/or other materials
+*       provided with the distribution.
+*
+* THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
+* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+* The views and conclusions contained in the software and documentation are those of the
+* authors and should not be interpreted as representing official policies, either expressed
+* or implied, of BetaSteward_at_googlemail.com.
+*/
+
+package mage.abilities.keyword;
+
+import java.io.ObjectStreamException;
+import mage.Constants.Zone;
+import mage.abilities.MageSingleton;
+import mage.abilities.StaticAbility;
+
+/**
+ * @author LevelX2
+ */
+public class CanAttackOnlyAloneAbility extends StaticAbility<CanAttackOnlyAloneAbility> implements MageSingleton {
+
+    private static final CanAttackOnlyAloneAbility fINSTANCE = new CanAttackOnlyAloneAbility();
+
+    private Object readResolve() throws ObjectStreamException {
+        return fINSTANCE;
+    }
+
+    public static CanAttackOnlyAloneAbility getInstance() {
+        return fINSTANCE;
+    }
+
+    private CanAttackOnlyAloneAbility() {
+        super(Zone.BATTLEFIELD, null);
+    }
+
+    @Override
+    public String getRule() {
+        return "{this} can only attack alone.";
+    }
+
+    @Override
+    public CanAttackOnlyAloneAbility copy() {
+        return fINSTANCE;
+    }
+
+}

Mage/src/mage/game/combat/Combat.java

@@ -33,6 +33,7 @@ import java.util.*;
 import mage.Constants.Outcome;
 import mage.abilities.Ability;
 import mage.abilities.effects.RequirementEffect;
+import mage.abilities.keyword.CanAttackOnlyAloneAbility;
 import mage.abilities.keyword.CantAttackAloneAbility;
 import mage.abilities.keyword.VigilanceAbility;
 import mage.filter.common.FilterControlledCreaturePermanent;
@@ -206,6 +207,24 @@ public class Combat implements Serializable, Copyable<Combat> {
         for (CombatGroup group: groups) {
             count += group.getAttackers().size();
         }
+
+        if (count > 1) {
+            List<UUID> tobeRemoved = new ArrayList<UUID>();
+            for (CombatGroup group: groups) {
+                for (UUID attackingCreatureId: group.getAttackers()) {
+                    Permanent attacker = game.getPermanent(attackingCreatureId);
+                    if (count >1 && attacker != null && attacker.getAbilities().containsKey(CanAttackOnlyAloneAbility.getInstance().getId())) {
+                        game.informPlayers(attacker.getName() + " can only attack alone. Removing it from combat.");
+                        tobeRemoved.add(attackingCreatureId);
+                        count--;
+                    }
+                }
+            }
+            for (UUID attackingCreatureId : tobeRemoved) {
+                this.removeAttacker(attackingCreatureId, game);
+            }
+        }
+
         if (count == 1) {
             List<UUID> tobeRemoved = new ArrayList<UUID>();
             for (CombatGroup group: groups) {
@@ -222,6 +241,7 @@ public class Combat implements Serializable, Copyable<Combat> {
             }
 
         }
+
     }
 
     public void selectBlockers(Game game) {