Package org.apache.isis.core.metamodel.facets.properties.choices.enums

Source Code of org.apache.isis.core.metamodel.facets.properties.choices.enums.PropertyChoicesFacetDerivedFromChoicesFacet

/*
*  Licensed to the Apache Software Foundation (ASF) under one
*  or more contributor license agreements.  See the NOTICE file
*  distributed with this work for additional information
*  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
*  with the License.  You may obtain a copy of the License at
*
*        http://www.apache.org/licenses/LICENSE-2.0
*
*  Unless required by applicable law or agreed to in writing,
*  software distributed under the License is distributed on an
*  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
*  KIND, either express or implied.  See the License for the
*  specific language governing permissions and limitations
*  under the License.
*/

package org.apache.isis.core.metamodel.facets.properties.choices.enums;

import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facets.FacetedMethod;
import org.apache.isis.core.metamodel.facets.propparam.choices.ChoicesFacet;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;
import org.apache.isis.core.metamodel.spec.SpecificationLoader;
import org.apache.isis.core.metamodel.facets.properties.choices.PropertyChoicesFacetAbstract;

public class PropertyChoicesFacetDerivedFromChoicesFacet extends PropertyChoicesFacetAbstract {

    public PropertyChoicesFacetDerivedFromChoicesFacet(final FacetHolder holder, final SpecificationLoader specificationLookup) {
        super(holder, specificationLookup);
    }

    @Override
    public Object[] getChoices(final ObjectAdapter adapter, final SpecificationLoader specificationLookup) {
        final FacetHolder facetHolder = getFacetHolder();
        final FacetedMethod noap = (FacetedMethod) facetHolder;
        final ObjectSpecification noSpec = getSpecification(noap.getType());
        final ChoicesFacet choicesFacet = noSpec.getFacet(ChoicesFacet.class);
        if (choicesFacet == null) {
            return new Object[0];
        }
        return choicesFacet.getChoices(adapter);
    }

    public ObjectSpecification getSpecification(final Class<?> type) {
        return type == null ? null : getSpecificationLoader().loadSpecification(type);
    }

}
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