better message when dependency is interface

2012-03-15 00:14:18 +04:00
parent 9524b48676
commit 245a4f079c
1 changed files with 4 additions and 0 deletions
@@ -339,6 +339,10 @@ public class DependencyInjectorGenerator {
    private void initializeByConstructorCall(Field field, Field neededFor) {
        Class<?> type = field.getType();

+        if (type.isInterface()) {
+            throw new IllegalArgumentException("cannot instantiate interface: " + type.getName() + " needed for " + neededFor);
+        }
+
        // Look for constructor
        Constructor<?>[] constructors = type.getConstructors();
        if (constructors.length == 0 || !Modifier.isPublic(constructors[0].getModifiers())) {