SoloMapComponentRejectPolicy.java 文件源码

/**
 * @throws a MultipleSoloMapComponentException if a duplicate
 *         instance of SoloMapComponent exists.
 * @return true if the object can be added to the MapHandler.
 */
public boolean canAdd(BeanContextSupport bc, Object obj)
        throws MultipleSoloMapComponentException {
    if (obj instanceof SoloMapComponent) {
        Class firstClass = obj.getClass();
        for (Iterator it = bc.iterator(); it.hasNext();) {
            Object someObj = it.next();
            if (someObj instanceof SoloMapComponent) {
                Class secondClass = someObj.getClass();

                if (firstClass == secondClass
                        || firstClass.isAssignableFrom(secondClass)
                        || secondClass.isAssignableFrom(firstClass)) {

                    throw new MultipleSoloMapComponentException(firstClass, secondClass);
                }
            }
        }
    }
    return true;
}