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Prevent NPE - issue #105 #106

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4 changes: 3 additions & 1 deletion src/main/java/com/tinkerpop/frames/annotations/AdjacencyAnnotationHandler.java
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,8 @@ public Object processVertex(final Adjacency adjacency, final Method method, fina
returnValue = framedGraph.addVertex(null, returnType);
newVertex = ((VertexFrame) returnValue).asVertex();
} else {
if (arguments[0] == null)
throw new IllegalArgumentException("null passed to @Adjacency " + method.getName() + " labelled " + adjacency.label());
newVertex = ((VertexFrame) arguments[0]).asVertex();
}
addEdges(adjacency, framedGraph, vertex, newVertex);
Expand Down Expand Up @@ -101,4 +103,4 @@ private void removeEdges(final Direction direction, final String label, final Ve
}
}
}
}
}