private boolean getState()

in modeler/cayenne-modeler/src/main/java/org/apache/cayenne/modeler/action/PasteAction.java [496:542]
32 lines of code
27 McCabe index (conditional complexity)

    private boolean getState() {
        try {
            Object content = Toolkit.getDefaultToolkit().getSystemClipboard().getData(
                    CayenneTransferable.CAYENNE_FLAVOR);

            if (content instanceof List) {
                content = ((List) content).get(0);
            }

            Object currentObject = getProjectController().getCurrentObject();

            if (currentObject == null) {
                return false;
            }

            /**
             * Checking all available pairs source-pasting object
             */

            return ((currentObject instanceof DataChannelDescriptor || currentObject instanceof DataNodeDescriptor) && content instanceof DataMap)
                    ||

                    (currentObject instanceof DataMap && isTreeLeaf(content))
                    ||

                    (currentObject instanceof DataMap && content instanceof DataMap)
                    ||

                    (currentObject instanceof DbEntity && (content instanceof DbAttribute
                            || content instanceof DbRelationship || isTreeLeaf(content)))
                    ||

                    (currentObject instanceof ObjEntity && (content instanceof ObjAttribute
                            || content instanceof ObjRelationship || content instanceof ObjCallbackMethod || isTreeLeaf(content)))
                    ||

                    (currentObject instanceof Embeddable && (content instanceof EmbeddableAttribute || isTreeLeaf(content)))
                    ||

                    (currentObject instanceof Procedure
                            && (content instanceof ProcedureParameter || isTreeLeaf(content)) ||

                            (currentObject instanceof Query && isTreeLeaf(content)));
        } catch (Exception ex) {
            return false;
        }
    }