/*
* 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.param.defaults.fromtype;
import org.apache.isis.core.metamodel.facetapi.FacetUtil;
import org.apache.isis.core.metamodel.facetapi.FeatureType;
import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
import org.apache.isis.core.metamodel.facets.actions.defaults.ActionDefaultsFacet;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;
import org.apache.isis.core.metamodel.facets.object.defaults.DefaultedFacet;
public class ActionParameterDefaultFacetDerivedFromTypeFactory extends FacetFactoryAbstract {
public ActionParameterDefaultFacetDerivedFromTypeFactory() {
super(FeatureType.PARAMETERS_ONLY);
}
/**
* If there is a {@link DefaultedFacet} on any of the action's parameter
* types, then installs a {@link ActionDefaultsFacet} for the action.
*/
@Override
public void processParams(final ProcessParameterContext processParameterContext) {
// don't overwrite any defaults already picked up
if (processParameterContext.getFacetHolder().getFacet(ActionDefaultsFacet.class) != null) {
return;
}
// try to infer defaults from any of the parameter's underlying types
final Class<?>[] parameterTypes = processParameterContext.getMethod().getParameterTypes();
final DefaultedFacet[] parameterTypeDefaultedFacets = new DefaultedFacet[parameterTypes.length];
boolean hasAtLeastOneDefault = false;
for (int i = 0; i < parameterTypes.length; i++) {
final Class<?> paramType = parameterTypes[i];
parameterTypeDefaultedFacets[i] = getDefaultedFacet(paramType);
hasAtLeastOneDefault = hasAtLeastOneDefault | (parameterTypeDefaultedFacets[i] != null);
}
if (hasAtLeastOneDefault) {
FacetUtil.addFacet(new ActionParameterDefaultFacetDerivedFromTypeFacets(parameterTypeDefaultedFacets, processParameterContext.getFacetHolder()));
}
}
private DefaultedFacet getDefaultedFacet(final Class<?> paramType) {
final ObjectSpecification paramTypeSpec = getSpecificationLoader().loadSpecification(paramType);
return paramTypeSpec.getFacet(DefaultedFacet.class);
}
}