CODEWITHSUNDEEP
javamavenjpadatanucleus
Adrian Ber
Adrian Ber

Reputation: 21390

Datanucleus enhancer error: transient method

I have a class

@Entity
public class MyClass extends BaseClass {
    ... 
    public boolean isOpenAt(Date x) {
        return true; // or whatever
    }
}

@MappedSuperclass
@Access(AccessType.Field)
public abstract class BaseClass {
    ...
}

Running mvn datanucleus:enhance I get the error org.datanucleus.metadata.InvalidClassMetaDataException: "MyClass.openAt" : declared in MetaData, but this field doesnt exist in the class! Any idea why?

I'm using org.datanucleus:datanucleus-core:3.2.7, org.datanucleus:datanucleus-accessplatform-jpa-rdbms:3.3.2, org.eclipse.persistence:javax.persistence:2.1.0, org.datanucleus:datanucleus-maven-plugin:3.3.0-release.

Upvotes: 0

Views: 175

Answers (1)

iluxa
iluxa

Reputation: 6969

Disclaimer: I have no idea what datanucleus is.

That said, it's likely that isOpenAt() method gets treated as a getter (similar to getFirstName(), say), since according to According to the JavaBeans spec,

Boolean properties

In addition, for boolean properties, we allow a getter method to match the pattern:

public boolean is<PropertyName>();

This "isPropertyName" method may be provided instead of a "get" method, or it may be provided in addition to a "get" method. In either case, if the is method is present for a boolean property then we will use the "is" method to read the property value. An example boolean property might be:

public boolean isMarsupial(); public void setMarsupial(boolean m);

Try renaming isOpenAt() into seeIfOpenAt() and see if that helps.

Upvotes: 1

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