Quick fix for Issue #57

src/main/java/edu/rpi/legup/puzzle/shorttruthtable/ShortTruthTableCell.java

@@ -34,7 +34,7 @@ public ShortTruthTableCell(Point location){
 
     //Getters
 
-    public ShortTruthTableStatement getStatementRefference() {
+    public ShortTruthTableStatement getStatementReference() {
         return statement;
     }
 
@@ -67,7 +67,7 @@ public boolean isAssigned(){
 
     //Setters
 
-    void setStatementRefference(ShortTruthTableStatement statement){
+    void setStatementReference(ShortTruthTableStatement statement){
         this.statement = statement;
     }
 

src/main/java/edu/rpi/legup/puzzle/shorttruthtable/ShortTruthTableImporter.java

@@ -169,7 +169,7 @@ private ShortTruthTableBoard generateBoard(List<List<ShortTruthTableCell>> allCe
                 //for a cell to exist at (x, y), it must be a valid row and within the statment length
                 if(y%2==0 && x < statements.get(statementIndex).getLength()) {
                     cell = allCells.get(statementIndex).get(x);
-                    System.out.println("Importer: check cell statement ref: "+cell.getStatementRefference());
+                    System.out.println("Importer: check cell statement ref: "+cell.getStatementReference());
                 }else{
                     //if it is not a valid cell space, add a NOT_IN_PLAY cell
                     cell = new ShortTruthTableCell(' ', ShortTruthTableCellType.NOT_IN_PLAY, new Point(x, y));

src/main/java/edu/rpi/legup/puzzle/shorttruthtable/ShortTruthTableStatement.java

@@ -9,7 +9,6 @@
 import java.awt.Point;
 import java.util.List;
 import java.util.ArrayList;
-import java.util.Arrays;
 
 
 public class ShortTruthTableStatement extends PuzzleElement<String>{
@@ -52,7 +51,7 @@ private ShortTruthTableStatement(String statement, ShortTruthTableStatement pare
 		//construct the cell for this node in the tree
 		cell = cells.get(index);
 		//give the cell a reference back to this statement
-		cell.setStatementRefference(this);
+		cell.setStatementReference(this);
 
 		//get the strings on either side of this char in the string rep
 		String left = statement.substring(0, index);

src/main/java/edu/rpi/legup/puzzle/shorttruthtable/rules/basic/BasicRule_Generic.java

@@ -8,13 +8,8 @@
 
 import edu.rpi.legup.puzzle.shorttruthtable.ShortTruthTableBoard;
 import edu.rpi.legup.puzzle.shorttruthtable.ShortTruthTableCell;
-import edu.rpi.legup.puzzle.shorttruthtable.ShortTruthTableCellType;
-import edu.rpi.legup.puzzle.shorttruthtable.ShortTruthTableStatement;
 import edu.rpi.legup.model.rules.ContradictionRule;
 
-import java.awt.*;
-import java.util.List;
-
 public abstract class BasicRule_Generic extends BasicRule {
 
     final ContradictionRule correspondingContradictionRule;
@@ -42,7 +37,7 @@ public String checkRuleRawAt(TreeTransition transition, PuzzleElement element){
         //check that it is assigned to the right value
         ShortTruthTableBoard originalBoard = (ShortTruthTableBoard) transition.getParents().get(0).getBoard();
 
-        //Use this board to check what would happen if the cell what the oppisite value
+        //Use this board to check what would happen if the cell what the opposite value
         ShortTruthTableBoard testBoard = originalBoard.copy();
         ((ShortTruthTableCell) testBoard.getPuzzleElement(element)).setType(cell.getType().getNegation());
 
@@ -51,18 +46,62 @@ public String checkRuleRawAt(TreeTransition transition, PuzzleElement element){
 
         //if elimination, check the parent
         if(this.eliminationRule){
-            checkElement = cell.getStatementRefference().getParentStatement().getCell();
+            System.out.println("Is an elimination rule");
+            checkElement = cell.getStatementReference().getParentStatement().getCell();
         }
 
         //see if there is a contradiction
+        if (this.eliminationRule)
+            System.out.println("Parent check contradiction START");
         String checkContradiction = correspondingContradictionRule.checkContradictionAt(testBoard, checkElement);
+        if (this.eliminationRule)
+        {
+            System.out.println("Parent check contradiction END");
+            System.out.println("Parent contradiction: " + checkContradiction);
+        }
 
-        //if there is a contradition when the modified element is negated, then the basic riule must be true
-        if(checkContradiction==null)
-            return null;
 
+        //if there is a contradiction when the modified element is negated, then the basic rule must be true
+        if(checkContradiction==null && !eliminationRule)
+        {
+            return null;
+        }
+        // if it's an elimination rule, check if the original case was also invalid
+        else if (checkContradiction == null && eliminationRule)
+        {
+            String checkOriginalContradiction = correspondingContradictionRule.checkContradictionAt(originalBoard, checkElement);
+            if (checkOriginalContradiction == null)
+                return "Invalid use of " + this.ruleName;
+            else
+                return null;
+        }
         return "Negated Contradiction Failed: "+checkContradiction;
 
+//        if (this.eliminationRule)
+//        {
+//            System.out.println("Elimination rule check entered");
+//            // If the rule is an elimination rule, we can check if the statement contains a contradiction. If it does
+//            // contain a contradiction, then we know that the rule must be false
+//
+//            String checkContradiction = correspondingContradictionRule.checkContradictionAt(originalBoard, checkElement);
+//            System.out.println("checkContradiction: " + checkContradiction);
+//            if (checkContradiction == null) // original board contains a contradiction: this is bad!
+//                return "This is not a valid use of " + this.ruleName + "!";
+//            return null;
+//        }
+//        else
+//        {
+//            // If the rule is not an elimination rule, we can check to see if negating the modified cell will create
+//            // a contradiction
+//
+//            // Use the original board to check what would happen if the cell what the opposite value
+//            ShortTruthTableBoard testBoard = originalBoard.copy();
+//            ((ShortTruthTableCell) testBoard.getPuzzleElement(element)).setType(cell.getType().getNegation());
+//            String checkContradiction = correspondingContradictionRule.checkContradictionAt(testBoard, checkElement);
+//            if (checkContradiction == null) // modified board contains a contradiction: this is good!
+//                return null;
+//            return "Negated Contradiction Failed: "+checkContradiction;
+//        }
     }
 
     /**

src/main/java/edu/rpi/legup/puzzle/shorttruthtable/rules/basic/elimination/BasicRuleAndElimination.java

@@ -6,7 +6,7 @@ public class BasicRuleAndElimination extends BasicRule_GenericElimination {
 
     public BasicRuleAndElimination() {
         super("And", new ContradictionRuleAnd());
-        System.out.println("and eliminatio constructor");
+        //System.out.println("and elimination constructor");
     }
 
 }

src/main/java/edu/rpi/legup/puzzle/shorttruthtable/rules/caserule/CaseRule_GenericStatement.java

@@ -3,8 +3,6 @@
 import edu.rpi.legup.model.gameboard.Board;
 import edu.rpi.legup.model.gameboard.CaseBoard;
 import edu.rpi.legup.model.gameboard.PuzzleElement;
-import edu.rpi.legup.model.rules.CaseRule;
-import edu.rpi.legup.model.tree.TreeTransition;
 
 import edu.rpi.legup.puzzle.shorttruthtable.ShortTruthTableBoard;
 import edu.rpi.legup.puzzle.shorttruthtable.ShortTruthTableCell;
@@ -14,7 +12,6 @@
 
 
 import java.util.ArrayList;
-import java.util.List;
 
 public abstract class CaseRule_GenericStatement extends CaseRule_Generic {
 
@@ -63,10 +60,10 @@ public CaseBoard getCaseBoard(Board board) {
             //the statement must be assigned with unassigned sub-statements
             if(!cell.getType().isTrueOrFalse()) continue;
             System.out.println("  Operation is known");
-            if(cell.getStatementRefference().getRightStatement().getCell().getType().isTrueOrFalse()) continue;
+            if(cell.getStatementReference().getRightStatement().getCell().getType().isTrueOrFalse()) continue;
             System.out.println("  right side is unknown");
             if(this.operation != ShortTruthTableOperation.NOT &&
-                    cell.getStatementRefference().getRightStatement().getCell().getType().isTrueOrFalse()) continue;
+                    cell.getStatementReference().getRightStatement().getCell().getType().isTrueOrFalse()) continue;
             System.out.println("  left side is unknown");
 
             System.out.println("    Valid choice");
@@ -113,7 +110,7 @@ private ArrayList<Board> getCasesFromCell(ShortTruthTableBoard board, PuzzleElem
 
             //get the statement of the square that was selected
             ShortTruthTableCell cell = b.getCellFromElement(puzzleElement);
-            ShortTruthTableStatement statement = cell.getStatementRefference();
+            ShortTruthTableStatement statement = cell.getStatementReference();
 
             //modify its children
             //avoid error if it is a NOT statement

src/main/java/edu/rpi/legup/puzzle/shorttruthtable/rules/contradiction/ContradictionRuleAnd.java

@@ -13,6 +13,7 @@ public ContradictionRuleAnd(){
                 new ShortTruthTableCellType[][] {
                     {n, T, F},
                     {F, T, n},
+                    // {F, T, F},
                     {T, F, T},
                 }
         );

src/main/java/edu/rpi/legup/puzzle/shorttruthtable/rules/contradiction/ContradictionRule_GenericStatement.java

@@ -9,11 +9,8 @@
 import edu.rpi.legup.puzzle.shorttruthtable.ShortTruthTableCell;
 import edu.rpi.legup.puzzle.shorttruthtable.ShortTruthTableCellType;
 import edu.rpi.legup.puzzle.shorttruthtable.ShortTruthTableStatement;
-import edu.rpi.legup.puzzle.shorttruthtable.ShortTruthTableOperation;
 
-import java.util.Set;
 import java.util.Arrays;
-import java.util.Iterator;
 
 
 public abstract class ContradictionRule_GenericStatement extends ContradictionRule{
@@ -36,16 +33,21 @@ public ContradictionRule_GenericStatement(String ruleName, String description, S
 
 
     @Override
-    public String checkContradictionAt(Board puzzleBoard, PuzzleElement puzzleElement) {
+    public String checkContradictionAt(Board puzzleBoard, PuzzleElement operatorPuzzleElement) {
 
-        //cast the board toa shortTruthTableBoard
+        //cast the board to a shortTruthTableBoard
         ShortTruthTableBoard board = (ShortTruthTableBoard) puzzleBoard;
 
         //get the cell that contradicts another cell in the board
-        ShortTruthTableCell cell = board.getCellFromElement(puzzleElement);
-        ShortTruthTableStatement statement = cell.getStatementRefference();
+        ShortTruthTableCell cell = board.getCellFromElement(operatorPuzzleElement);
+        ShortTruthTableStatement statement = cell.getStatementReference();
+        // ShortTruthTableStatement parentStatement = statement.getParentStatement();
+        System.out.println("Statement: " + statement);
+
 
         //must be the correct statement
+        System.out.println("Symbol: " + cell.getSymbol());
+
         if(cell.getSymbol() != this.operationSymbol)
             return "This cell does not contain the correct operation";
 
@@ -58,10 +60,11 @@ public String checkContradictionAt(Board puzzleBoard, PuzzleElement puzzleElemen
         //get the pattern for this sub-statement
         ShortTruthTableCellType[] testPattern = statement.getCellTypePattern();
 
-        //if the board pattern matches any contradiction patter, it is a valid contradiction
+        //if the board pattern matches any contradiction pattern, it is a valid contradiction
+        System.out.println("Name: " + this.ruleName);
         System.out.println("Testing pattern: "+Arrays.toString(testPattern));
         for(ShortTruthTableCellType[] pattern : contradictionPatterns){
-            System.out.println("compareing to: "+Arrays.toString(pattern));
+            System.out.println("Comparing to: "+Arrays.toString(pattern));
             boolean matches = true;
             for(int i = 0; i<3; i++){
                 //null means that part does not affect the statement
@@ -74,12 +77,12 @@ public String checkContradictionAt(Board puzzleBoard, PuzzleElement puzzleElemen
             }
             //if testPattern matches one of the valid contradiction patterns, the contradiction is correct
             if(matches){
-                System.out.println("This is a valid contradiction: matches pat: "+pattern);
+                System.out.println("This is a valid contradiction: matches pat: "+Arrays.toString(pattern));
                 return null;
             }
         }
 
-        System.out.println("not patterns match. There is not a contradiction");
+        System.out.println("No patterns match. There is not a contradiction");
         return "This cell does not match any contradiction pattern for this rule";
 
     }