null check added

MeshModel/src/main/cz/fidentis/analyst/mesh/core/MeshComponent.java

@@ -22,7 +22,7 @@ public abstract class MeshComponent {
      * @return true if newParent was successfully added, false otherwise
      */
     public boolean addParent(MeshComponent newParent){
-        if (parents.contains(newParent))
+        if (newParent == null || parents.contains(newParent))
             return false;
         parents.add(newParent);
         return true;

MeshModel/src/main/cz/fidentis/analyst/mesh/core/MeshComposite.java

@@ -19,7 +19,7 @@ public class MeshComposite extends MeshComponent {
      */
     @Override
     public boolean addChild(MeshComponent newChild) {
-        if (children.contains(newChild))
+        if (newChild == null || children.contains(newChild))
             return false;
 
         children.add(newChild);

MeshModel/src/main/cz/fidentis/analyst/mesh/core/MeshEdge.java

@@ -6,6 +6,8 @@ public class MeshEdge extends MeshComposite {
 
     public MeshEdge(MeshPoint point1, MeshPoint point2){
         super();
+        if (point1 == null || point2 == null)
+            throw new NullPointerException("point1 and point2 cannot be null");
         super.addChild(point1);
         super.addChild(point2);
     }

MeshModel/src/main/cz/fidentis/analyst/mesh/core/MeshFacet.java

@@ -16,6 +16,9 @@ public class MeshFacet extends MeshComposite {
      * @return point from pointPool if it is in pointPool, null otherwise
      */
     public MeshPoint getPoint(MeshPoint point) {
+        if (point == null)
+            return null;
+
         MeshPoint result = pointPool.get(point);
         if (result == null) {
             pointPool.put(point, point);
@@ -30,6 +33,9 @@ public class MeshFacet extends MeshComposite {
      * @return edge from edgePool if it is in edgePool, null otherwise
      */
     public MeshEdge getEdge(MeshEdge edge) {
+        if (edge == null)
+            return null;
+
         MeshEdge result = edgePool.get(edge);
         if (result == null) {
             edgePool.put(edge, edge);

MeshModel/src/main/cz/fidentis/analyst/mesh/core/MeshPoint.java

@@ -7,6 +7,9 @@ public class MeshPoint extends MeshLeaf {
     private final Vector3d position, normal, texCoord;
 
     public MeshPoint(Vector3d position, Vector3d normal , Vector3d texCoord) {
+        if (position == null || normal == null || texCoord == null)
+            throw new NullPointerException("position, normal and texCoord cannot be null");
+
         this.position = position;
         this.normal = normal;
         this.texCoord = texCoord;