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EnumType.setParameterValues(Properties) reads the passed properties using properties.get() instead of properties.getProperty(). This causes NullPointerExceptions when passing in correctly configured parameters that contain nested defaults.
Example:
public class EnumByNameType extends EnumType {
private static final long serialVersionUID = -5179606529789070604L;
@Override
public void setParameterValues(Properties parameters) { Properties patchedParams = new Properties(parameters); patchedParams.setProperty(TYPE, Integer.toString(Types.VARCHAR)); super.setParameterValues(patchedParams ); }
One should always use getProperty() when dealing with Java Properties.
Also feel free to make a complaint to the original Java properties class developer for the poor API design 
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