ZorkConditions are immutable objects

src/main/java/com/github/dtschust/zork/Zork.java

@@ -61,7 +61,6 @@ public class Zork {
     }
 
 
-
     /* I love how basic java main functions are sometimes.*/
     public static void main(String[] args) {
         if (args.length != 1) {

src/main/java/com/github/dtschust/zork/ZorkCommand.java

@@ -1,13 +1,14 @@
 package com.github.dtschust.zork;
 
 /* Special Command condition */
-public class ZorkCommand extends ZorkCondition {
+public class ZorkCommand implements ZorkEvaluatable {
     public final String command;
 
     public ZorkCommand(String command) {
         this.command = command;
     }
 
+    @Override
     public boolean evaluate(Zork zork) {
         return command.equals(zork.userInput);
     }

src/main/java/com/github/dtschust/zork/ZorkCondition.java

@@ -1,8 +1,10 @@
 package com.github.dtschust.zork;
 
 /* Generic condition*/
-public abstract class ZorkCondition {
+public abstract class ZorkCondition implements ZorkEvaluatable {
-    public String object;
+    public final String object;
 
-    public abstract boolean evaluate(Zork zork);
+    protected ZorkCondition(String object) {
+        this.object = object;
+    }
 }

src/main/java/com/github/dtschust/zork/ZorkConditionHas.java

@@ -2,9 +2,16 @@ package com.github.dtschust.zork;
 
 /* Has conditions*/
 public class ZorkConditionHas extends ZorkCondition {
-    public String has;
+    private final String has;
-    public String owner;
+    private final String owner;
 
+    public ZorkConditionHas(String has, String object, String owner) {
+        super(object);
+        this.has = has;
+        this.owner = owner;
+    }
+
+    @Override
     public boolean evaluate(Zork zork) {
         /*Inventory is a special case as it isn't the name of any object in the game, check for it specifically*/
         if (owner.equals("inventory")) {

src/main/java/com/github/dtschust/zork/ZorkConditionStatus.java

@@ -2,8 +2,14 @@ package com.github.dtschust.zork;
 
 /* Status conditions*/
 public class ZorkConditionStatus extends ZorkCondition {
-    public String status;
+    private final String status;
 
+    public ZorkConditionStatus(String status, String object) {
+        super(object);
+        this.status = status;
+    }
+
+    @Override
     public boolean evaluate(Zork zork) {
         ZorkObject tested = zork.game.Objects.get(object);
         return tested != null && tested.status.equals(status);

src/main/java/com/github/dtschust/zork/ZorkEvaluatable.java

@@ -0,0 +1,5 @@
+package com.github.dtschust.zork;
+
+public interface ZorkEvaluatable {
+    boolean evaluate(Zork zork);
+}

src/main/java/com/github/dtschust/zork/ZorkTrigger.java

@@ -4,14 +4,14 @@ import java.util.ArrayList;
 
 /*Trigger*/
 public class ZorkTrigger {
-    public ArrayList<ZorkCondition> conditions = new ArrayList<>();
+    public ArrayList<ZorkEvaluatable> conditions = new ArrayList<>();
     public ArrayList<String> print = new ArrayList<>();
     public ArrayList<String> action = new ArrayList<>();
     public String type = "single"; /*By default, single*/
     public boolean hasCommand = false;
 
     public boolean evaluate(Zork zork) {
-        for (ZorkCondition condition : conditions) {
+        for (ZorkEvaluatable condition : conditions) {
             if (!condition.evaluate(zork)) {
                 return false;
             }

src/main/java/com/github/dtschust/zork/parser/ZorkReader.java

@@ -2,10 +2,7 @@ package com.github.dtschust.zork.parser;
 
 import com.github.dtschust.zork.*;
 import org.w3c.dom.CharacterData;
-import org.w3c.dom.Document;
+import org.w3c.dom.*;
-import org.w3c.dom.Element;
-import org.w3c.dom.Node;
-import org.w3c.dom.NodeList;
 
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
@@ -19,6 +16,16 @@ public class ZorkReader {
         this.filename = filename;
     }
 
+    /* Get a string from an element (XML parsing stuff)*/
+    public static String getString(Element e) {
+        Node child = e.getFirstChild();
+        if (child instanceof CharacterData) {
+            CharacterData cd = (CharacterData) child;
+            return cd.getData();
+        }
+        return "?";
+    }
+
     public ZorkGame build() {
         int j, k, l;
 
@@ -100,18 +107,19 @@ public class ZorkReader {
                                 NodeList object = condition.getElementsByTagName("object");
                                 NodeList has = condition.getElementsByTagName("has");
                                 if (has.getLength() > 0) {
-                                    ZorkConditionHas tempConditionHas = new ZorkConditionHas();
-                                    tempConditionHas.has = getString((Element) has.item(0));
-                                    tempConditionHas.object = getString((Element) object.item(0));
                                     NodeList owner = condition.getElementsByTagName("owner");
-                                    tempConditionHas.owner = getString((Element) owner.item(0));
+                                    ZorkConditionHas tempConditionHas = new ZorkConditionHas(
+                                            getString((Element) has.item(0)),
+                                            getString((Element) object.item(0)),
+                                            getString((Element) owner.item(0))
+                                    );
                                     tempTrigger.conditions.add(tempConditionHas);
-
                                 } else {
-                                    ZorkConditionStatus tempConditionStatus = new ZorkConditionStatus();
-                                    tempConditionStatus.object = getString((Element) object.item(0));
                                     NodeList sstatus = condition.getElementsByTagName("status");
-                                    tempConditionStatus.status = getString((Element) sstatus.item(0));
+                                    ZorkConditionStatus tempConditionStatus = new ZorkConditionStatus(
+                                            getString((Element) sstatus.item(0)),
+                                            getString((Element) object.item(0))
+                                    );
                                     tempTrigger.conditions.add(tempConditionStatus);
                                 }
 
@@ -211,18 +219,18 @@ public class ZorkReader {
                                 NodeList object = condition.getElementsByTagName("object");
                                 NodeList has = condition.getElementsByTagName("has");
                                 if (has.getLength() > 0) {
-                                    ZorkConditionHas tempConditionHas = new ZorkConditionHas();
-                                    tempConditionHas.has = getString((Element) has.item(0));
-                                    tempConditionHas.object = getString((Element) object.item(0));
                                     NodeList owner = condition.getElementsByTagName("owner");
-                                    tempConditionHas.owner = getString((Element) owner.item(0));
+                                    ZorkConditionHas tempConditionHas = new ZorkConditionHas(
+                                            getString((Element) has.item(0)),
+                                            getString((Element) object.item(0)),
+                                            getString((Element) owner.item(0)));
                                     tempTrigger.conditions.add(tempConditionHas);
-
                                 } else {
-                                    ZorkConditionStatus tempConditionStatus = new ZorkConditionStatus();
-                                    tempConditionStatus.object = getString((Element) object.item(0));
                                     NodeList sstatus = condition.getElementsByTagName("status");
-                                    tempConditionStatus.status = getString((Element) sstatus.item(0));
+                                    ZorkConditionStatus tempConditionStatus = new ZorkConditionStatus(
+                                            getString((Element) sstatus.item(0)),
+                                            getString((Element) object.item(0))
+                                    );
                                     tempTrigger.conditions.add(tempConditionStatus);
                                 }
 
@@ -305,18 +313,19 @@ public class ZorkReader {
                                 NodeList object = condition.getElementsByTagName("object");
                                 NodeList has = condition.getElementsByTagName("has");
                                 if (has.getLength() > 0) {
-                                    ZorkConditionHas tempConditionHas = new ZorkConditionHas();
-                                    tempConditionHas.has = getString((Element) has.item(0));
-                                    tempConditionHas.object = getString((Element) object.item(0));
                                     NodeList owner = condition.getElementsByTagName("owner");
-                                    tempConditionHas.owner = getString((Element) owner.item(0));
+                                    ZorkConditionHas tempConditionHas = new ZorkConditionHas(
+                                            getString((Element) has.item(0)),
+                                            getString((Element) object.item(0)),
+                                            getString((Element) owner.item(0))
+                                    );
                                     tempTrigger.conditions.add(tempConditionHas);
-
                                 } else {
-                                    ZorkConditionStatus tempConditionStatus = new ZorkConditionStatus();
-                                    tempConditionStatus.object = getString((Element) object.item(0));
                                     NodeList sstatus = condition.getElementsByTagName("status");
-                                    tempConditionStatus.status = getString((Element) sstatus.item(0));
+                                    ZorkConditionStatus tempConditionStatus = new ZorkConditionStatus(
+                                            getString((Element) sstatus.item(0)),
+                                            getString((Element) object.item(0))
+                                    );
                                     tempTrigger.conditions.add(tempConditionStatus);
                                 }
 
@@ -380,18 +389,18 @@ public class ZorkReader {
                                 NodeList object = condition.getElementsByTagName("object");
                                 NodeList has = condition.getElementsByTagName("has");
                                 if (has.getLength() > 0) {
-                                    ZorkConditionHas tempConditionHas = new ZorkConditionHas();
-                                    tempConditionHas.has = getString((Element) has.item(0));
-                                    tempConditionHas.object = getString((Element) object.item(0));
                                     NodeList owner = condition.getElementsByTagName("owner");
-                                    tempConditionHas.owner = getString((Element) owner.item(0));
+                                    ZorkConditionHas tempConditionHas = new ZorkConditionHas(
+                                            getString((Element) has.item(0)),
+                                            getString((Element) object.item(0)),
+                                            getString((Element) owner.item(0)));
                                     tempCreature.conditions.add(tempConditionHas);
-
                                 } else {
-                                    ZorkConditionStatus tempConditionStatus = new ZorkConditionStatus();
-                                    tempConditionStatus.object = getString((Element) object.item(0));
                                     NodeList sstatus = condition.getElementsByTagName("status");
-                                    tempConditionStatus.status = getString((Element) sstatus.item(0));
+                                    ZorkConditionStatus tempConditionStatus = new ZorkConditionStatus(
+                                            getString((Element) sstatus.item(0)),
+                                            getString((Element) object.item(0))
+                                    );
                                     tempCreature.conditions.add(tempConditionStatus);
                                 }
 
@@ -406,7 +415,6 @@ public class ZorkReader {
                                 Element action = (Element) actions.item(l);
                                 tempCreature.action.add(getString(action));
                             }
-
                         }
 
                         NodeList triggers = element.getElementsByTagName("trigger");
@@ -426,18 +434,18 @@ public class ZorkReader {
                                 NodeList object = condition.getElementsByTagName("object");
                                 NodeList has = condition.getElementsByTagName("has");
                                 if (has.getLength() > 0) {
-                                    ZorkConditionHas tempConditionHas = new ZorkConditionHas();
-                                    tempConditionHas.has = getString((Element) has.item(0));
-                                    tempConditionHas.object = getString((Element) object.item(0));
                                     NodeList owner = condition.getElementsByTagName("owner");
-                                    tempConditionHas.owner = getString((Element) owner.item(0));
+                                    ZorkConditionHas tempConditionHas = new ZorkConditionHas(
+                                            getString((Element) has.item(0)),
+                                            getString((Element) object.item(0)),
+                                            getString((Element) owner.item(0)));
                                     tempTrigger.conditions.add(tempConditionHas);
-
                                 } else {
-                                    ZorkConditionStatus tempConditionStatus = new ZorkConditionStatus();
-                                    tempConditionStatus.object = getString((Element) object.item(0));
                                     NodeList sstatus = condition.getElementsByTagName("status");
-                                    tempConditionStatus.status = getString((Element) sstatus.item(0));
+                                    ZorkConditionStatus tempConditionStatus = new ZorkConditionStatus(
+                                            getString((Element) sstatus.item(0)),
+                                            getString((Element) object.item(0))
+                                    );
                                     tempTrigger.conditions.add(tempConditionStatus);
                                 }
 
@@ -479,15 +487,4 @@ public class ZorkReader {
         return data;
     }
 
-
-    /* Get a string from an element (XML parsing stuff)*/
-    public static String getString(Element e) {
-        Node child = e.getFirstChild();
-        if (child instanceof CharacterData) {
-            CharacterData cd = (CharacterData) child;
-            return cd.getData();
-        }
-        return "?";
-    }
-
 }