RecreatableObjectFacetForDomainObjectAnnotation.java

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 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
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package org.apache.isis.core.metamodel.facets.object.domainobject.recreatable;

import org.apache.isis.applib.annotation.DomainObject;
import org.apache.isis.applib.annotation.Nature;
import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facets.PostConstructMethodCache;
import org.apache.isis.core.metamodel.facets.object.viewmodel.ViewModelFacet;
import org.apache.isis.core.metamodel.facets.object.recreatable.RecreatableObjectFacetDeclarativeInitializingAbstract;
import org.apache.isis.core.metamodel.services.ServicesInjector;
import org.apache.isis.core.metamodel.specloader.SpecificationLoader;

public class RecreatableObjectFacetForDomainObjectAnnotation extends
        RecreatableObjectFacetDeclarativeInitializingAbstract {

    public static ViewModelFacet create(
            final DomainObject domainObject,
            final SpecificationLoader specificationLoader,
            final AdapterManager adapterManager,
            final ServicesInjector servicesInjector,
            final FacetHolder holder,
            final PostConstructMethodCache postConstructMethodCache) {

        if(domainObject == null) {
            return null;
        }

        final Nature nature = domainObject.nature();
        switch (nature)
        {
            case NOT_SPECIFIED:
            case JDO_ENTITY:
            case MIXIN:
                // not a recreatable object, so no facet
                return null;

            case VIEW_MODEL:
                final ViewModelFacet existingFacet = holder.getFacet(ViewModelFacet.class);
                if (existingFacet != null) {
                    if (existingFacet.getArchitecturalLayer() == ArchitecturalLayer.APPLICATION) {
                        // if compatible existing facet, then just ignore
                        // (otherwise the metamodel
                        return null;
                    }
                    // otherwise, we continue through and add the new facet making the existing one the
                    // underlying.  The metamodel validator on RecreatableObjectFacetFactory will then mark the
                    // model as invalid because of incompatible semantics.
                }
                return new RecreatableObjectFacetForDomainObjectAnnotation(
                        holder,
                        ArchitecturalLayer.APPLICATION,
                        specificationLoader, adapterManager, servicesInjector, postConstructMethodCache);

            case EXTERNAL_ENTITY:
            case INMEMORY_ENTITY:
                return new RecreatableObjectFacetForDomainObjectAnnotation(
                        holder,
                        ArchitecturalLayer.DOMAIN,
                        specificationLoader, adapterManager, servicesInjector, postConstructMethodCache);
        }
        // shouldn't happen, the above switch should match all cases.
        throw new IllegalArgumentException("nature of '" + nature + "' not recognized");
    }

    private RecreatableObjectFacetForDomainObjectAnnotation(
            final FacetHolder holder,
            final ArchitecturalLayer architecturalLayer,
            final SpecificationLoader specificationLoader,
            final AdapterManager adapterManager,
            final ServicesInjector servicesInjector,
            final PostConstructMethodCache postConstructMethodCache) {
        super(holder, architecturalLayer, RecreationMechanism.INITIALIZES, specificationLoader, adapterManager, servicesInjector,
                postConstructMethodCache);
    }

}