loop to streams

Mage.Server/src/main/java/mage/server/ChatSession.java

@@ -129,9 +129,7 @@ public class ChatSession {
                     clientsToRemove.add(userId);
                 }
             }
-            for (UUID userIdToRemove : clientsToRemove) {
+            clients.keySet().removeAll(clientsToRemove);
-                clients.remove(userIdToRemove);
-            }
 
         }
     }

Mage.Server/src/main/java/mage/server/game/GameController.java

@@ -46,6 +46,7 @@ import mage.game.Table;
 import mage.game.events.Listener;
 import mage.game.events.PlayerQueryEvent;
 import mage.game.events.TableEvent;
+import mage.game.match.MatchPlayer;
 import mage.game.permanent.Permanent;
 import mage.interfaces.Action;
 import mage.players.Player;
@@ -65,7 +66,6 @@ import java.util.*;
 import java.util.Map.Entry;
 import java.util.concurrent.*;
 import java.util.zip.GZIPOutputStream;
-import mage.game.match.MatchPlayer;
 
 /**
  * @author BetaSteward_at_googlemail.com
@@ -108,12 +108,7 @@ public class GameController implements GameCallback {
         this.tableId = tableId;
         this.choosingPlayerId = choosingPlayerId;
         this.gameOptions = gameOptions;
-        for (Player player : game.getPlayers().values()) {
+        useTimeout = game.getPlayers().values().stream().allMatch(Player::isHuman);
-            if (!player.isHuman()) {
-                useTimeout = false; // no timeout for AI players because of beeing idle
-                break;
-            }
-        }
         init();
 
     }
@@ -832,13 +827,8 @@ public class GameController implements GameCallback {
         }
         final String message = new StringBuilder(game.getStep().getType().toString()).append(" - Waiting for ").append(controller.getName()).toString();
         for (final Entry<UUID, GameSessionPlayer> entry : gameSessions.entrySet()) {
-            boolean skip = false;
+            boolean skip = players.stream().anyMatch(playerId -> entry.getKey().equals(playerId));
-            for (UUID uuid : players) {
+
-                if (entry.getKey().equals(uuid)) {
-                    skip = true;
-                    break;
-                }
-            }
             if (!skip) {
                 entry.getValue().inform(message);
             }

Mage/src/main/java/mage/abilities/condition/common/DashedCondition.java

@@ -45,13 +45,10 @@ public enum DashedCondition implements Condition {
     public boolean apply(Game game, Ability source) {
         Card card = game.getCard(source.getSourceId());
         if (card != null) {
-            for (Ability ability : card.getAbilities()) {
+            return card.getAbilities().stream()
-                if (ability instanceof DashAbility) {
+                    .filter(a -> a instanceof DashAbility)
-                    if (((DashAbility) ability).isActivated(source, game)) {
+                    .anyMatch(d -> ((DashAbility)d).isActivated(source, game));
-                        return true;
+
-                    }
-                }
-            }
         }
         return false;
     }

Mage/src/main/java/mage/abilities/condition/common/EvokedCondition.java

@@ -48,13 +48,9 @@ public enum EvokedCondition implements Condition {
     public boolean apply(Game game, Ability source) {
         Card card = game.getCard(source.getSourceId());
         if (card != null) {
-            for (Ability ability: card.getAbilities()) {
+            return card.getAbilities().stream()
-                if (ability instanceof EvokeAbility) {
+                    .filter(ab -> ab instanceof EvokeAbility)
-                    if(((EvokeAbility) ability).isActivated(source, game)) {
+                    .anyMatch(evoke -> ((EvokeAbility) evoke).isActivated(source, game));
-                        return true;
-                    }
-                }
-            }
         }
         return false;
     }

Mage/src/main/java/mage/abilities/costs/mana/ManaCosts.java

@@ -27,13 +27,15 @@
  */
 package mage.abilities.costs.mana;
 
-import java.util.List;
-import java.util.UUID;
 import mage.Mana;
 import mage.abilities.Ability;
 import mage.abilities.costs.VariableCost;
 import mage.game.Game;
 
+import java.util.List;
+import java.util.UUID;
+import java.util.stream.Collectors;
+
 /**
  *
  * @author BetaSteward_at_googlemail.com
@@ -63,14 +65,10 @@ public interface ManaCosts<T extends ManaCost> extends List<T>, ManaCost {
 
 
     static ManaCosts<ManaCost> removeVariableManaCost(ManaCosts<ManaCost> m) {
-        ManaCosts<ManaCost> manaCosts = new ManaCostsImpl<>();
+        return m.stream()
-        for(ManaCost manaCost : m){
+                .filter(mc -> !(mc instanceof VariableManaCost))
-            if(!(manaCost instanceof VariableManaCost)){
+                .collect(Collectors.toCollection(ManaCostsImpl<ManaCost>::new));
-                manaCosts.add(manaCost);
 
-            }
-        }
-        return manaCosts;
     }
 
 }

Mage/src/main/java/mage/abilities/dynamicvalue/common/DiscardCostCardConvertedMana.java

@@ -18,11 +18,7 @@ public class DiscardCostCardConvertedMana implements DynamicValue {
         for (Cost cost : sourceAbility.getCosts()) {
             if (cost instanceof DiscardTargetCost) {
                 DiscardTargetCost discardCost = (DiscardTargetCost) cost;
-                int cmc = 0;
+                return discardCost.getCards().stream().mapToInt(Card::getConvertedManaCost).sum();
-                for (Card card : discardCost.getCards()) {
-                    cmc += card.getConvertedManaCost();
-                }
-                return cmc;
             }
         }
         return 0;

Mage/src/main/java/mage/abilities/dynamicvalue/common/SacrificeCostCreaturesPower.java

@@ -6,7 +6,6 @@ import mage.abilities.costs.common.SacrificeTargetCost;
 import mage.abilities.dynamicvalue.DynamicValue;
 import mage.abilities.effects.Effect;
 import mage.game.Game;
-import mage.game.permanent.Permanent;
 
 /**
  * @author LevelX2
@@ -18,11 +17,8 @@ public class SacrificeCostCreaturesPower implements DynamicValue {
         for (Cost cost : sourceAbility.getCosts()) {
             if (cost instanceof SacrificeTargetCost) {
                 SacrificeTargetCost sacrificeCost = (SacrificeTargetCost) cost;
-                int powerSum = 0;
+                return sacrificeCost.getPermanents()
-                for (Permanent permanent : sacrificeCost.getPermanents()) {
+                        .stream().mapToInt(p -> p.getPower().getValue()).sum();
-                    powerSum += permanent.getPower().getValue();
-                }
-                return powerSum;
             }
         }
         return 0;

Mage/src/main/java/mage/abilities/dynamicvalue/common/SacrificeCostCreaturesToughness.java

@@ -6,7 +6,6 @@ import mage.abilities.costs.common.SacrificeTargetCost;
 import mage.abilities.dynamicvalue.DynamicValue;
 import mage.abilities.effects.Effect;
 import mage.game.Game;
-import mage.game.permanent.Permanent;
 
 /**
  * @author LevelX2
@@ -18,11 +17,7 @@ public class SacrificeCostCreaturesToughness implements DynamicValue {
         for (Cost cost : sourceAbility.getCosts()) {
             if (cost instanceof SacrificeTargetCost) {
                 SacrificeTargetCost sacrificeCost = (SacrificeTargetCost) cost;
-                int toughnessSum = 0;
+                return sacrificeCost.getPermanents().stream().mapToInt(p -> p.getToughness().getValue()).sum();
-                for (Permanent permanent : sacrificeCost.getPermanents()) {
-                    toughnessSum += permanent.getToughness().getValue();
-                }
-                return toughnessSum;
             }
         }
         return 0;

Mage/src/main/java/mage/abilities/keyword/ConspireAbility.java

@@ -27,10 +27,6 @@
  */
 package mage.abilities.keyword;
 
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.Set;
-import java.util.UUID;
 import mage.abilities.Ability;
 import mage.abilities.SpellAbility;
 import mage.abilities.StaticAbility;
@@ -56,6 +52,11 @@ import mage.game.stack.StackObject;
 import mage.players.Player;
 import mage.target.common.TargetControlledPermanent;
 
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Set;
+import java.util.UUID;
+
 /*
  * 702.77. Conspire
  * 702.77a Conspire is a keyword that represents two abilities.
@@ -165,7 +166,7 @@ public class ConspireAbility extends StaticAbility implements OptionalAdditional
                 if (conspireCost.canPay(ability, getSourceId(), getControllerId(), game)
                         && player.chooseUse(Outcome.Benefit, "Pay " + conspireCost.getText(false) + " ?", ability, game)) {
                     activateConspire(ability, game);
-                    for (Iterator it = ((Costs) conspireCost).iterator(); it.hasNext();) {
+                    for (Iterator it = conspireCost.iterator(); it.hasNext(); ) {
                         Cost cost = (Cost) it.next();
                         ability.getCosts().add(cost.copy());
                     }

Mage/src/main/java/mage/game/draft/DraftImpl.java

@@ -28,20 +28,16 @@
 
 package mage.game.draft;
 
-import java.util.*;
-
 import mage.cards.Card;
 import mage.cards.ExpansionSet;
 import mage.game.draft.DraftOptions.TimingOption;
-import mage.game.events.Listener;
+import mage.game.events.*;
-import mage.game.events.PlayerQueryEvent;
-import mage.game.events.PlayerQueryEventSource;
-import mage.game.events.TableEvent;
 import mage.game.events.TableEvent.EventType;
-import mage.game.events.TableEventSource;
 import mage.players.Player;
 import mage.players.PlayerList;
 
+import java.util.*;
+
 /**
  *
  * @author BetaSteward_at_googlemail.com
@@ -262,22 +258,16 @@ public abstract class DraftImpl implements Draft {
         if(isAbort()) {
             return true;
         }
-        for (DraftPlayer player: players.values()) {
+        return players.values()
-            if (player.isPicking()) {
+                .stream()
-                return false;
+                .noneMatch(DraftPlayer::isPicking);
-            }
+
-        }
-        return true;
     }
 
     @Override
     public boolean allJoined() {
-        for (DraftPlayer player: this.players.values()) {
+        return players.values().stream()
-            if (!player.isJoined()) {
+                .allMatch(DraftPlayer::isJoined);
-                return false;
-            }
-        }
-        return true;
     }
 
     @Override