JPAOverriddenAnnotationReader.java 文件源码

private Annotation getConvertsForAttribute(List<Element> elementsForProperty, XMLContext.Default defaults) {
    // NOTE : we use a map here to make sure that an xml and annotation referring to the same attribute
    // properly overrides.  Very sparse map, yes, but easy setup.
    // todo : revisit this
    // although bear in mind that this code is no longer used in 5.0...

    final Map<String,Convert> convertAnnotationsMap = new HashMap<String, Convert>();

    for ( Element element : elementsForProperty ) {
        final boolean isBasic = "basic".equals( element.getName() );
        final boolean isEmbedded = "embedded".equals( element.getName() );

        // todo : can be collections too

        final boolean canHaveConverts = isBasic || isEmbedded;

        if ( !canHaveConverts ) {
            continue;
        }

        final String attributeNamePrefix = isBasic ? null : propertyName;
        applyXmlDefinedConverts( element, defaults, attributeNamePrefix, convertAnnotationsMap );
    }

    // NOTE : per section 12.2.3.16 of the spec <convert/> is additive, although only if "metadata-complete" is not
    // specified in the XML

    if ( defaults.canUseJavaAnnotations() ) {
        // todo : note sure how to best handle attributeNamePrefix here
        applyPhysicalConvertAnnotations( propertyName, convertAnnotationsMap );
    }

    if ( !convertAnnotationsMap.isEmpty() ) {
        final AnnotationDescriptor groupingDescriptor = new AnnotationDescriptor( Converts.class );
        groupingDescriptor.setValue( "value", convertAnnotationsMap.values().toArray( new Convert[convertAnnotationsMap.size()]) );
        return AnnotationFactory.create( groupingDescriptor );
    }

    return null;
}