/*
* 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.choices.method;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.List;
import org.apache.isis.core.commons.lang.ObjectExtensions;
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.facets.param.choices.ActionChoicesFacetAbstract;
import org.apache.isis.core.metamodel.spec.DomainModelException;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;
import org.apache.isis.core.metamodel.spec.SpecificationLoader;
import org.apache.isis.core.metamodel.facets.CollectionUtils;
public class ActionChoicesFacetViaMethod extends ActionChoicesFacetAbstract implements ImperativeFacet {
private final Method method;
private final Class<?> choicesType;
private final SpecificationLoader specificationLookup;
private final AdapterManager adapterMap;
public ActionChoicesFacetViaMethod(final Method method, final Class<?> choicesType, final FacetHolder holder, final SpecificationLoader specificationLookup, final AdapterManager adapterManager) {
super(holder);
this.method = method;
this.choicesType = choicesType;
this.specificationLookup = specificationLookup;
this.adapterMap = 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.CHOICES_OR_AUTOCOMPLETE;
}
@Override
public boolean impliesResolve() {
return true;
}
@Override
public boolean impliesObjectChanged() {
return false;
}
@Override
public Object[][] getChoices(final ObjectAdapter owningAdapter) {
final Object invoke = ObjectAdapter.InvokeUtils.invoke(method, owningAdapter);
if (!(invoke instanceof Object[])) {
throw new DomainModelException("Expected an array of collections (Object[]) containing choices for all parameters, but got " + invoke + " instead. Perhaps the parameter number is missing!");
}
final Object[] options = (Object[]) invoke;
final Object[][] results = new Object[options.length][];
for (int i = 0; i < results.length; i++) {
if (options[i] == null) {
results[i] = null;
} else if (options[i].getClass().isArray()) {
results[i] = ObjectExtensions.asArray(options[i]);
} else {
final ObjectSpecification specification = getSpecificationLookup().loadSpecification(choicesType);
results[i] = CollectionUtils.getCollectionAsObjectArray(options[i], specification, getAdapterMap());
}
}
return results;
}
@Override
protected String toStringValues() {
return "method=" + method + ",type=" + choicesType;
}
// ///////////////////////////////////////////////////////
// Dependencies
// ///////////////////////////////////////////////////////
private SpecificationLoader getSpecificationLookup() {
return specificationLookup;
}
private AdapterManager getAdapterMap() {
return adapterMap;
}
}