PlayerPredicates: add new class like CardPredicates but for Players

.gitattributes

@@ -611,6 +611,7 @@ forge-game/src/main/java/forge/game/player/Player.java svneol=native#text/plain
 forge-game/src/main/java/forge/game/player/PlayerActionConfirmMode.java -text
 forge-game/src/main/java/forge/game/player/PlayerController.java -text
 forge-game/src/main/java/forge/game/player/PlayerOutcome.java -text
+forge-game/src/main/java/forge/game/player/PlayerPredicates.java -text svneol=unset#text/plain
 forge-game/src/main/java/forge/game/player/PlayerStatistics.java -text
 forge-game/src/main/java/forge/game/player/PlayerView.java -text
 forge-game/src/main/java/forge/game/player/RegisteredPlayer.java -text

forge-game/src/main/java/forge/game/player/PlayerPredicates.java

@@ -0,0 +1,29 @@
+package forge.game.player;
+
+import java.util.Comparator;
+
+import com.google.common.base.Predicate;
+
+import forge.game.spellability.SpellAbility;
+import forge.game.zone.ZoneType;
+
+public final class PlayerPredicates {
+
+    public static final Predicate<Player> isTargetableBy(final SpellAbility source) {
+        return new Predicate<Player>() {
+            @Override
+            public boolean apply(final Player p) {
+                return p.canBeTargetedBy(source);
+            }
+        };
+    }
+
+    public static final Comparator<Player> compareByZoneSize(final ZoneType zone) {
+        return new Comparator<Player>() {
+            @Override
+            public int compare(Player arg0, Player arg1) {
+                return Integer.compare(arg0.getCardsIn(zone).size(), arg1.getCardsIn(zone).size());
+            }
+        };
+    }
+}