PropertyNotFoundException if source object has no constructor with a parameter for the property not found

When trying to convert from the following class(es):

public class XOrderSearchResultRecordType {
    protected AdsType ads;
    //getter, setter
}

...

public class AdsType {
    protected List<XAdRecord> xAdRecord;
    //getter, setter

Using the following configuration:

    public void configure(MapperFactory factory) {
        factory .classMap(XOrderSearchResultRecordType.class, Target.class)
                .field("ads.xAdRecord", "targetField").register();
    }
}

I get a PropertyNotFoundException on “xAdRecord”. Curiously, specifying the name of the field as XAdRecord (notice the capital X) makes Orika work. Also, adding a constructor to AdsType above with xAdRecord as a parameter will make Orika work (happens in PropertyResolver.getProperty(…) on line 706). Stacktrace:

Caused by: ma.glasnost.orika.MappingException: ClassMapBuilder.map(XOrderSearchResultRecordType, AdOrder).field('ads.xAdRecord', 'placement'): Error: could not resolve nested property [ads.xAdRecord] on XOrderSearchResultRecordType, because xAdRecord does not belong to AdsType
	at ma.glasnost.orika.metadata.ClassMapBuilder.fieldMap(ClassMapBuilder.java:338)
	at ma.glasnost.orika.metadata.ClassMapBuilder.fieldMap(ClassMapBuilder.java:311)
	at ma.glasnost.orika.metadata.ClassMapBuilder.field(ClassMapBuilder.java:249)
	at net.persgroep.adhub.converter.XOrderSearchResultRecordTypeMappingConfigurer.configure(XOrderSearchResultRecordTypeMappingConfigurer.java:18)
	at net.persgroep.adhub.converter.OrikaModelMapper.configureNewMapperFacade(OrikaModelMapper.java:51)
	at net.persgroep.adhub.converter.OrikaModelMapper.setApplicationContext(OrikaModelMapper.java:78)
	at org.springframework.context.support.ApplicationContextAwareProcessor.invokeAwareInterfaces(ApplicationContextAwareProcessor.java:121)
	at org.springframework.context.support.ApplicationContextAwareProcessor.postProcessBeforeInitialization(ApplicationContextAwareProcessor.java:97)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:409)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1620)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
	... 74 more
Caused by: ma.glasnost.orika.PropertyNotFoundException: could not resolve nested property [ads.xAdRecord] on XOrderSearchResultRecordType, because xAdRecord does not belong to AdsType
	at ma.glasnost.orika.property.PropertyResolver.getNestedProperty(PropertyResolver.java:500)
	at ma.glasnost.orika.property.PropertyResolver.getProperty(PropertyResolver.java:676)
	at ma.glasnost.orika.property.PropertyResolver.getProperty(PropertyResolver.java:634)
	at ma.glasnost.orika.metadata.ClassMapBuilder.resolveProperty(ClassMapBuilder.java:879)
	at ma.glasnost.orika.metadata.FieldMapBuilder.<init>(FieldMapBuilder.java:78)
	at ma.glasnost.orika.metadata.FieldMapBuilder.<init>(FieldMapBuilder.java:61)
	at ma.glasnost.orika.metadata.ClassMapBuilder.fieldMap(ClassMapBuilder.java:328)
	... 84 more

[rubin55]

Argh… from the JavaBeans 1.01 spec document, section 8.8: capitalization of inferred names:

"When we use design patterns to infer a property or event name, we need to decide what rules to follow for capitalizing the inferred name. If we extract the name from the middle of a normal mixedCase style Java name then the name will, by default, begin with a capital letter. Java programmers are accustomed to having normal identifiers start with lower case letters. Vigorous reviewer input has convinced us that we should follow this same conventional rule for property and event names.

Thus when we extract a property or event name from the middle of an existing Java name, we normally convert the first character to lower case. However to support the occasional use of all upper-case names, we check if the first two characters of the name are both upper case and if so leave it alone. So for example, “FooBah” becomes “fooBah” “Z” becomes “z” “URL” becomes “URL”

We provide a method Introspector.decapitalize which implements this conversion rule."

I consider this is a bug in the specification (which dates from '97), but I have no illusion that that will ever be fixed… Alas, maybe someone else will run into this issue and bump into this ticket. I hope the above clarifies why capitalization of a field might or might not happen.

[elaatifi]

We’ve introduced RegexPropertyResolver to support your own convention: https://orika-mapper.github.io/orika-docs/extensibility.html