new method with tests to get all cards with a filter predicate.

New method in Interface API to get all cards in a given setCode.
This has changed the implementation of getArtCount avoiding to iterate over all the possible card prints.

forge-core/src/main/java/forge/card/CardDb.java

@@ -29,6 +29,7 @@ import forge.util.Lang;
 import forge.util.TextUtil;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.tuple.Pair;
+import org.checkerframework.checker.nullness.compatqual.NullableDecl;
 
 import java.util.*;
 import java.util.Map.Entry;
@@ -721,18 +722,16 @@ public final class CardDb implements ICardDatabase, IDeckGenPool {
     }
 
     @Override
-    public int getArtCount(String cardName, String setName) {
-        if (cardName == null || setName == null)
+    public int getArtCount(String cardName, String setCode) {
+        if (cardName == null || setCode == null)
             return 0;
-        Collection<PaperCard> cards = getAllCards(cardName);
-        if (null == cards || cards.size() == 0)
-            return 0;
-        int artCount = 0;
-        for (PaperCard pc : cards) {
-            if (pc.getEdition().equalsIgnoreCase(setName))
-                artCount++;
-        }
-        return artCount;
+        Collection<PaperCard> cardsInSet = getAllCards(cardName, new Predicate<PaperCard>() {
+            @Override
+            public boolean apply(PaperCard card) {
+                return card.getEdition().equalsIgnoreCase(setCode);
+            }
+        });
+        return cardsInSet.size();
     }
 
     // returns a list of all cards from their respective latest (or preferred) editions
@@ -839,6 +838,11 @@ public final class CardDb implements ICardDatabase, IDeckGenPool {
         return Lists.newArrayList(Iterables.filter(getAllCards(), predicate));
     }
 
+    @Override
+    public List<PaperCard> getAllCards(final String cardName, Predicate<PaperCard> predicate){
+        return Lists.newArrayList(Iterables.filter(getAllCards(cardName), predicate));
+    }
+
     /**
      * Returns a modifiable list of cards matching the given predicate
      */

forge-core/src/main/java/forge/card/ICardDatabase.java

@@ -79,6 +79,7 @@ public interface ICardDatabase extends Iterable<PaperCard> {
     Collection<PaperCard> getAllCards();
     Collection<PaperCard> getAllCards(String cardName);
     Collection<PaperCard> getAllCards(Predicate<PaperCard> predicate);
+    Collection<PaperCard> getAllCards(String cardName,Predicate<PaperCard> predicate);
     Collection<PaperCard> getAllCards(CardEdition edition);
     Collection<PaperCard> getUniqueCards();
 

forge-gui-desktop/src/test/java/forge/card/CardDbTestCase.java

@@ -1,5 +1,6 @@
 package forge.card;
 
+import com.google.common.base.Predicate;
 import forge.StaticData;
 import forge.item.IPaperCard;
 import forge.item.PaperCard;
@@ -10,7 +11,10 @@ import org.testng.annotations.Test;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.time.Instant;
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Date;
+import java.util.List;
 
 import static org.testng.Assert.*;
 
@@ -101,6 +105,44 @@ public class CardDbTestCase extends ForgeCardMockTestCase {
         this.legacyCardDb = new LegacyCardDb(data.getCommonCards().getAllCards(), data.getEditions());
     }
 
+    /*
+     * TEST FOR GET ALL CARDS
+     */
+
+    @Test
+    public void testGetAllCardsWithName(){
+        List<PaperCard> allCounterSpellPrints = this.cardDb.getAllCards(this.cardNameCounterspell);
+        assertNotNull(allCounterSpellPrints);
+        for (PaperCard card : allCounterSpellPrints)
+            assertEquals(card.getName(), this.cardNameCounterspell);
+    }
+
+    @Test
+    public void testGetAllCardsThatWerePrintedInSets(){
+        List<String> allowedSets = new ArrayList<>();
+        allowedSets.add(this.latestArtShivanDragonEdition);
+        Predicate<PaperCard> wasPrinted = (Predicate<PaperCard>) this.cardDb.wasPrintedInSets(allowedSets);
+        List<PaperCard> allCardsInSet = this.cardDb.getAllCards(wasPrinted);
+        assertNotNull(allCardsInSet);
+    }
+
+    @Test void testGetAllCardsOfaGivenNameAndLegalInSets(){
+        List<String> allowedSets = new ArrayList<>(Arrays.asList(this.editionsCounterspell));
+        Predicate<PaperCard> printedInSets = (Predicate<PaperCard>) this.cardDb.wasPrintedInSets(allowedSets);
+        List<PaperCard> allCounterSpellsInSets = this.cardDb.getAllCards(this.cardNameCounterspell, printedInSets);
+        assertNotNull(allCounterSpellsInSets);
+        assertTrue(allCounterSpellsInSets.size() > 0);
+        assertTrue(allCounterSpellsInSets.size() > 1);
+        for (PaperCard card : allCounterSpellsInSets) {
+            assertEquals(card.getName(), this.cardNameCounterspell);
+        }
+    }
+
+
+    /*
+     * TEST FOR CARD RETRIEVAL METHODS
+     */
+
     @Test
     public void testGetCardByName() {
         PaperCard legacyCard = this.legacyCardDb.getCard(cardNameShivanDragon);