Can't compile trait using gmavenplus plugin

问题

I have a trait:

trait AbstractSender {

    abstract SentTrigger sendMail(Mail main)

    SentTrigger sentTrigger(Mail mail){
        //do smth here
    }
}

And I have a class:

class EmailSender implements AbstractSender{

    @Override
    SentTrigger sendMail(Mail mail){
        //do some stuff
    }
}

I try to compile it using gmavenplus plugin:

<plugin>
                    <groupId>org.codehaus.gmavenplus</groupId>
                    <artifactId>gmavenplus-plugin</artifactId>
                    <version>1.5</version>
                    <executions>
                        <execution>
                            <goals>
                                <goal>addSources</goal>
                                <goal>addTestSources</goal>
                                <goal>generateStubs</goal>
                                <goal>compile</goal>
                                <goal>testGenerateStubs</goal>
                                <goal>testCompile</goal>
                                <goal>removeStubs</goal>
                                <goal>removeTestStubs</goal>
                            </goals>
                        </execution>
                    </executions>
<dependencies>
                    <dependency>
                        <groupId>org.codehaus.groovy</groupId>
                        <artifactId>groovy-all</artifactId>
                        <!-- any version of Groovy \>= 1.5.0 should work here -->
                        <version>2.4.4</version>
                        <scope>runtime</scope>
                    </dependency>
                </dependencies>
                </plugin>

and get compile exception:

EmailSender is not abstract and does not override abstract method sentTrigger in AbstractSender

method sentTrigger is implemented. Generated java code looks this way:

@groovy.transform.Trait() public interface AbstractSender
 {
;
 SentTrigger sendMail(Mail mail);
 sentTrigger sentTrigger(Mail mail);
}

Which does explain compilation error. What do I do wrong with gmavenplus plugin?

回答1:

It's not a GMavenPlus configuration issue. You can put this in your GroovyConsole to demonstrate this

trait AbstractSender {
  abstract SentTrigger send(Mail main)

  SentTrigger sentTrigger(Mail mail) { }
}

class EmailSender implements AbstractSender{
  @Override
  SentTrigger sendMail(Mail mail) { }
}

class Mail { }
class SentTrigger { }

new  EmailSender()

The error message you're seeing is correct. EmailSender only implements sendMail(), not send(). If you rename sendMail() to send(), it should compile correctly.

来源：https://stackoverflow.com/questions/32224258/cant-compile-trait-using-gmavenplus-plugin

标签

groovy

traits