Spring bean to google guice conversion

Question

Below snippet is taken from here. My question is how can I have this binding in Guice.

<bean id="searchProcessor" class="com.googlecode.genericdao.search.jpa.JPASearchProcessor">
            <constructor-arg ref="metadataUtil" />
    </bean>

    <bean id="metadataUtil" class="com.googlecode.genericdao.search.jpa.hibernate.HibernateMetadataUtil"
            factory-method="getInstanceForEntityManagerFactory">
            <constructor-arg ref="entityManagerFactory" />
    </bean>

I need to @Inject JPASearchProcessor (see below). I am completely new to Guice.

@Inject
public void setSearchProcessor(JPASearchProcessor searchProcessor) {
        super.setSearchProcessor(searchProcessor);
}

Answer 1

I was able to resolve this by myself

A provider class HibernateMetadataUtilProvider is create to provide HibernateMetadataUtil

    package core.models.dao;

    import javax.persistence.EntityManagerFactory;

    import org.hibernate.ejb.HibernateEntityManagerFactory;

    import com.google.inject.Inject;
    import com.google.inject.Provider;
    import com.googlecode.genericdao.search.MetadataUtil;
    import com.googlecode.genericdao.search.jpa.hibernate.HibernateMetadataUtil;

    @SuppressWarnings("deprecation")
    public class HibernateMetadataUtilProvider
            implements Provider<MetadataUtil> {

        @Inject
        private EntityManagerFactory emf;

        @Override
        public MetadataUtil get() {
            return HibernateMetadataUtil.getInstanceForEntityManagerFactory((HibernateEntityManagerFactory) emf);
        }
     }

Another class JPASearchProcessorProvider is created which will inject JPASearchProcessor

    package core.models.dao;

    import com.google.inject.Inject;
    import com.google.inject.Provider;
    import com.googlecode.genericdao.search.MetadataUtil;
    import com.googlecode.genericdao.search.jpa.JPASearchProcessor;

    public class JPASearchProcessorProvider implements Provider<JPASearchProcessor> {

        @Inject
        private MetadataUtil mdu;

        @Override
        public JPASearchProcessor get() {
            return new JPASearchProcessor(mdu);
        }

    }

Then in our inject class we can simply bind these providers

    public class AppInjector extends AbstractModule {


        @Override
        protected void configure() {


            /*
             * JPA Bindings
             */
            bind(JPASearchProcessor.class).toProvider(JPASearchProcessorProvider.class);
            bind(MetadataUtil.class).toProvider(HibernateMetadataUtilProvider.class);


    }