fix: correct direction of < and > , also renamed less to lower

Author: Julia Pham

src/main/java/de/vill/model/constraint/ExpressionConstraint.java

@@ -78,13 +78,13 @@ public boolean evaluate(Set<Feature> selectedFeatures) {
 
         if (ConstantSymbols.EQUALS.equals(expressionSymbol)) {
             return leftResult == rightResult;
-        } else if (ConstantSymbols.GREATER.equals(expressionSymbol)) {
+        } else if (ConstantSymbols.LOWER.equals(expressionSymbol)) {
             return leftResult < rightResult;
-        } else if (ConstantSymbols.LESS.equals(expressionSymbol)) {
+        } else if (ConstantSymbols.GREATER.equals(expressionSymbol)) {
             return leftResult > rightResult;
-        } else if (ConstantSymbols.LESS_OR_EQUAL.equals(expressionSymbol)) {
-            return leftResult >= rightResult;
         } else if (ConstantSymbols.GREATER_OR_EQUAL.equals(expressionSymbol)) {
+            return leftResult >= rightResult;
+        } else if (ConstantSymbols.LOWER_OR_EQUAL.equals(expressionSymbol)) {
             return leftResult <= rightResult;
         } else if (ConstantSymbols.NOT_EQUALS.equals(expressionSymbol)) {
             return leftResult != rightResult;

src/main/java/de/vill/model/constraint/GreaterEqualsEquationConstraint.java

@@ -10,7 +10,7 @@
 
 public class GreaterEqualsEquationConstraint extends ExpressionConstraint {
     public GreaterEqualsEquationConstraint(final Expression left, final Expression right) {
-        super(left, right, ConstantSymbols.LESS_OR_EQUAL);
+        super(left, right, ConstantSymbols.GREATER_OR_EQUAL);
     }
 
     @Override

src/main/java/de/vill/model/constraint/GreaterEquationConstraint.java

@@ -10,7 +10,7 @@
 
 public class GreaterEquationConstraint extends ExpressionConstraint {
     public GreaterEquationConstraint(final Expression left, final Expression right) {
-        super(left, right, ConstantSymbols.LESS);
+        super(left, right, ConstantSymbols.GREATER);
     }
 
     @Override

src/main/java/de/vill/model/constraint/LowerEqualsEquationConstraint.java

@@ -8,7 +8,7 @@
 
 public class LowerEqualsEquationConstraint extends ExpressionConstraint {
     public LowerEqualsEquationConstraint(final Expression left, final Expression right) {
-        super(left, right, ConstantSymbols.GREATER_OR_EQUAL);
+        super(left, right, ConstantSymbols.LOWER_OR_EQUAL);
     }
 
     @Override

src/main/java/de/vill/model/constraint/LowerEquationConstraint.java

@@ -8,7 +8,7 @@
 
 public class LowerEquationConstraint extends ExpressionConstraint {
     public LowerEquationConstraint(final Expression left, final Expression right) {
-        super(left, right, ConstantSymbols.GREATER);
+        super(left, right, ConstantSymbols.LOWER);
     }
 
     @Override

src/main/java/de/vill/util/ConstantSymbols.java

@@ -12,10 +12,10 @@ public class ConstantSymbols {
     // Comparison
     public static final String EQUALS = "==";
     public static final String NOT_EQUALS = "!=";
-    public static final String GREATER = "<";
-    public static final String LESS = ">";
-    public static final String GREATER_OR_EQUAL = "<=";
-    public static final String LESS_OR_EQUAL = ">=";
+    public static final String GREATER = ">";
+    public static final String LOWER = "<";
+    public static final String GREATER_OR_EQUAL = ">=";
+    public static final String LOWER_OR_EQUAL = "<=";
 
     //Parenthesis
     public static final String PAREN_OPEN = "(";