DisabledFacetOnPropertyDerivedFromImmutableFactory.java

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 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
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 *
 *        http://www.apache.org/licenses/LICENSE-2.0
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 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
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package org.apache.isis.core.metamodel.facets.properties.disabled.fromimmutable;

import org.apache.isis.core.metamodel.facetapi.FacetUtil;
import org.apache.isis.core.metamodel.facetapi.FeatureType;
import org.apache.isis.core.metamodel.facets.FacetFactory;
import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
import org.apache.isis.core.metamodel.facets.FacetedMethod;
import org.apache.isis.core.metamodel.facets.members.disabled.DisabledFacet;
import org.apache.isis.core.metamodel.facets.object.immutable.ImmutableFacet;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;

/**
 * REVIEW: I'm not sure this {@link FacetFactory} actually makes sense. Just
 * because a type is immutable, doesn't imply that the property can't change the
 * instance that it refers to?
 */
public class DisabledFacetOnPropertyDerivedFromImmutableFactory extends FacetFactoryAbstract {

    public DisabledFacetOnPropertyDerivedFromImmutableFactory() {
        super(FeatureType.PROPERTIES_ONLY);
    }

    @Override
    public void process(final ProcessMethodContext processMethodContext) {
        final ObjectSpecification spec = getSpecificationLoader().loadSpecification(processMethodContext.getMethod().getDeclaringClass());
        if (spec.containsDoOpFacet(ImmutableFacet.class)) {
            final ImmutableFacet immutableFacet = spec.getFacet(ImmutableFacet.class);
            final FacetedMethod facetHolder = processMethodContext.getFacetHolder();
            DisabledFacet facet = facetHolder.getFacet(DisabledFacet.class);
            if(facet != null && facet.isInvertedSemantics()) {
                // @Property(editing=ENABLED)
                return;
            }
            FacetUtil.addFacet(new DisabledFacetOnPropertyDerivedFromImmutable(immutableFacet, facetHolder));
        }
    }

}