/*
* 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.progmodel.facets.param.validate.perspec;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.List;
import org.apache.isis.applib.annotation.MustSatisfy;
import org.apache.isis.applib.spec.Specification;
import org.apache.isis.core.metamodel.facetapi.Facet;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facetapi.FacetUtil;
import org.apache.isis.core.metamodel.facetapi.FeatureType;
import org.apache.isis.core.metamodel.facets.AnnotationBasedFacetFactoryAbstract;
public class MustSatisfySpecificationOnParameterFacetFactory extends AnnotationBasedFacetFactoryAbstract {
public MustSatisfySpecificationOnParameterFacetFactory() {
super(FeatureType.PARAMETERS_ONLY);
}
@Override
public void processParams(final ProcessParameterContext processParameterContext) {
final java.lang.annotation.Annotation[] parameterAnnotations = getParameterAnnotations(processParameterContext.getMethod())[processParameterContext.getParamNum()];
for (final Annotation parameterAnnotation : parameterAnnotations) {
if (parameterAnnotation instanceof MustSatisfy) {
final MustSatisfy annotation = (MustSatisfy) parameterAnnotation;
FacetUtil.addFacet(create(annotation, processParameterContext.getFacetHolder()));
return;
}
}
}
private Facet create(final MustSatisfy annotation, final FacetHolder holder) {
if (annotation == null) {
return null;
}
final Class<?>[] values = annotation.value();
final List<Specification> specifications = new ArrayList<Specification>();
for (final Class<?> value : values) {
final Specification specification = newSpecificationElseNull(value);
if (specification != null) {
specifications.add(specification);
}
}
return specifications.size() > 0 ? new MustSatisfySpecificationOnParameterFacet(specifications, holder) : null;
}
private static Specification newSpecificationElseNull(final Class<?> value) {
if (!(Specification.class.isAssignableFrom(value))) {
return null;
}
try {
return (Specification) value.newInstance();
} catch (final InstantiationException e) {
return null;
} catch (final IllegalAccessException e) {
return null;
}
}
}