Some bugfixes

ccm-core/src/main/java/org/libreccm/imexport/EntityImExporterTreeManager.java

@@ -254,16 +254,12 @@ final class EntityImExporterTreeManager {
 
         //Check if the nodes list has an entry for the required module.
         if (!nodes.containsKey(requiredClass.getName())) {
-
             LOGGER.fatal("Required EntityImExporter for \"{}\" no found.",
                          requiredClass.getName());
             throw new DependencyException(String.format(
                 "EntityImExporter for type \"%s\" depends on type \"%s\" "
                     + "but no EntityImExporter for type \"%s\" is available.",
-                node
+                node.getEntityImExporter().getEntityClass(),
-                    .getEntityImExporter()
-                    .getClass()
-                    .getAnnotation(Processes.class).value().getName(),
                 requiredClass.getName(),
                 requiredClass.getName()));
         }

ccm-core/src/main/java/org/libreccm/imexport/EntityImExporterTreeNode.java

@@ -22,6 +22,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
+import java.util.stream.Collectors;
 
 /**
  * A node in the dependency tree managed by {@link EntityImExporterTreeManager}.
@@ -106,8 +107,9 @@ final class EntityImExporterTreeNode {
     public int hashCode() {
         int hash = 7;
         hash = 47
-               * hash 
+                   * hash
-               + Objects.hashCode(this.entityImExporter.getClass().getName());
+                   + Objects
+                .hashCode(this.entityImExporter.getClass().getName());
         return hash;
     }
 
@@ -128,6 +130,29 @@ final class EntityImExporterTreeNode {
             other.getEntityImExporter().getClass().getName());
     }
 
-    
+    @Override
+    public String toString() {
+        return String.format(
+            "%s{ "
+                + "entityImExporter: %s, "
+                + "dependentImExporters: [%s], "
+                + "dependsOn: [%s]"
+                + " }",
+            super.toString(),
+            entityImExporter.getEntityClass().toString(),
+            dependentImExporters
+                .stream()
+                .map(EntityImExporterTreeNode::getEntityImExporter)
+                .map(AbstractEntityImExporter::getEntityClass)
+                .map(Class::getName)
+                .collect(Collectors.joining(", ")),
+            dependsOn
+                .stream()
+                .map(EntityImExporterTreeNode::getEntityImExporter)
+                .map(AbstractEntityImExporter::getEntityClass)
+                .map(Class::getName)
+                .collect(Collectors.joining(", "))
+        );
+    }
 
 }