public static PropertyType getPropertyType(String key) {
        PropertyType type = null;
        Property prop = PROPERTIES.get(key);
        if (prop != null) {
            type = prop.getPropertyType();
        }
        return type;
    }
Get the type of a property

@param key name of the property
@return the type of the property
tika-core/src/main/java/org/apache/tika/metadata/Property.java