/*
* 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.defaults.method;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.List;
import org.apache.isis.core.commons.exceptions.UnknownTypeException;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facets.ImperativeFacet;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;
import org.apache.isis.core.metamodel.spec.SpecificationLoader;
import org.apache.isis.core.metamodel.facets.properties.defaults.PropertyDefaultFacetAbstract;
public class PropertyDefaultFacetViaMethod extends PropertyDefaultFacetAbstract implements ImperativeFacet {
private final Method method;
private final SpecificationLoader specificationLookup;
private final AdapterManager adapterManager;
public PropertyDefaultFacetViaMethod(final Method method, final FacetHolder holder, final SpecificationLoader specificationLookup, final AdapterManager adapterManager) {
super(holder);
this.method = method;
this.specificationLookup = specificationLookup;
this.adapterManager = adapterManager;
}
/**
* Returns a singleton list of the {@link Method} provided in the
* constructor.
*/
@Override
public List<Method> getMethods() {
return Collections.singletonList(method);
}
@Override
public Intent getIntent(final Method method) {
return Intent.DEFAULTS;
}
@Override
public boolean impliesResolve() {
return true;
}
@Override
public boolean impliesObjectChanged() {
return false;
}
@Override
public ObjectAdapter getDefault(final ObjectAdapter owningAdapter) {
final Object result = ObjectAdapter.InvokeUtils.invoke(method, owningAdapter);
if (result == null) {
return null;
}
return createAdapter(method.getReturnType(), result);
}
private ObjectAdapter createAdapter(final Class<?> type, final Object object) {
final ObjectSpecification specification = getSpecificationLookup().loadSpecification(type);
if (specification.isNotCollection()) {
return getAdapterManager().adapterFor(object);
} else {
throw new UnknownTypeException("not an object, is this a collection?");
}
}
@Override
protected String toStringValues() {
return "method=" + method;
}
// //////////////////////////////////////////////////////////////////
// Dependencies (from constructor)
// //////////////////////////////////////////////////////////////////
private SpecificationLoader getSpecificationLookup() {
return specificationLookup;
}
protected AdapterManager getAdapterManager() {
return adapterManager;
}
}