/*
* 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 com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import org.apache.isis.core.commons.authentication.AuthenticationSession;
import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
import org.apache.isis.core.metamodel.consent.InteractionInitiatedBy;
import org.apache.isis.core.metamodel.deployment.DeploymentCategory;
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.specloader.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 DeploymentCategory deploymentCategory;
private final SpecificationLoader specificationLoader;
private final AuthenticationSessionProvider authenticationSessionProvider;
private final AdapterManager adapterManager;
public ActionChoicesFacetViaMethod(
final Method method,
final Class<?> choicesType,
final FacetHolder holder,
final DeploymentCategory deploymentCategory,
final SpecificationLoader specificationLoader,
final AuthenticationSessionProvider authenticationSessionProvider,
final AdapterManager adapterManager) {
super(holder);
this.method = method;
this.choicesType = choicesType;
this.deploymentCategory = deploymentCategory;
this.specificationLoader = specificationLoader;
this.authenticationSessionProvider = authenticationSessionProvider;
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.CHOICES_OR_AUTOCOMPLETE;
}
@Override
public Object[][] getChoices(
final ObjectAdapter owningAdapter,
final InteractionInitiatedBy interactionInitiatedBy) {
final Object objectOrCollection = ObjectAdapter.InvokeUtils.invoke(method, owningAdapter);
if (!(objectOrCollection instanceof Object[])) {
throw new DomainModelException(String.format(
"Expected an array of collections (Object[]) containing choices for all parameters, "
+ "but got %s instead. Perhaps the parameter number is missing?",
objectOrCollection));
}
final Object[] options = (Object[]) objectOrCollection;
final Object[][] results = new Object[options.length][];
for (int i = 0; i < results.length; i++) {
final Class<?> parameterType = method.getParameterTypes()[i];
results[i] = handleResults(options[i], parameterType,
interactionInitiatedBy);
}
return results;
}
private Object[] handleResults(
final Object collectionOrArray,
final Class<?> parameterType,
final InteractionInitiatedBy interactionInitiatedBy) {
if (collectionOrArray == null) {
return null;
}
final ObjectAdapter collectionAdapter = getAdapterManager().adapterFor(collectionOrArray);
final AuthenticationSession authenticationSession = getAuthenticationSession();
final DeploymentCategory deploymentCategory = getDeploymentCategory();
final List<ObjectAdapter> visibleAdapters =
ObjectAdapter.Util.visibleAdapters(
collectionAdapter,
interactionInitiatedBy);
final List<Object> filteredObjects = Lists.newArrayList(
Iterables.transform(visibleAdapters, ObjectAdapter.Functions.getObject()));
final ObjectSpecification parameterSpec = getSpecification(parameterType);
return CollectionUtils.getCollectionAsObjectArray(filteredObjects, parameterSpec, getAdapterManager());
}
@Override
protected String toStringValues() {
return "method=" + method + ",type=" + choicesType;
}
protected ObjectSpecification getSpecification(final Class<?> type) {
return type != null ? getSpecificationLoader().loadSpecification(type) : null;
}
// ///////////////////////////////////////////////////////
// Dependencies
// ///////////////////////////////////////////////////////
protected SpecificationLoader getSpecificationLoader() {
return specificationLoader;
}
protected AdapterManager getAdapterManager() {
return adapterManager;
}
protected DeploymentCategory getDeploymentCategory() {
return deploymentCategory;
}
protected AuthenticationSession getAuthenticationSession() {
return authenticationSessionProvider.getAuthenticationSession();
}
}