/*
* 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.viewer.html.task;
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.facets.collections.modify.CollectionFacet;
import org.apache.isis.core.metamodel.facets.collections.modify.CollectionFacetUtils;
import org.apache.isis.core.metamodel.spec.Persistability;
import org.apache.isis.core.metamodel.spec.feature.ObjectAction;
import org.apache.isis.core.runtime.system.context.IsisContext;
import org.apache.isis.core.runtime.system.transaction.MessageBroker;
import org.apache.isis.viewer.html.action.Action;
import org.apache.isis.viewer.html.action.ActionException;
import org.apache.isis.viewer.html.component.Page;
import org.apache.isis.viewer.html.context.Context;
import org.apache.isis.viewer.html.request.ForwardRequest;
import org.apache.isis.viewer.html.request.Request;
public final class InvokeMethod implements Action {
@Override
public void execute(final Request request, final Context context, final Page page) {
final String idString = request.getObjectId();
if (idString == null) {
throw new ActionException("Task no longer in progress");
}
final ObjectAdapter target = context.getMappedObject(idString);
final String id = request.getActionId();
final ObjectAction action = context.getMappedAction(id);
if (action == null) {
throw new ActionException("No such action: " + id);
}
boolean executeImmediately = false;
// TODO use new promptForParameters method instead of all this
final boolean isContributedMethod = action.isContributed();
if (action.getParameterCount() == 0) {
executeImmediately = true;
} else if (action.getParameterCount() == 1 && isContributedMethod && target.getSpecification().isOfType(action.getParameters().get(0).getSpecification())) {
executeImmediately = true;
}
if (executeImmediately) {
final ObjectAdapter[] parameters = isContributedMethod ? new ObjectAdapter[] { target } : null;
final ObjectAdapter result = action.execute(target, parameters);
final MessageBroker broker = IsisContext.getMessageBroker();
final List<String> messages = broker.getMessages();
final List<String> warnings = broker.getWarnings();
context.setMessagesAndWarnings(messages, warnings);
context.processChanges();
final String targetId = context.mapObject(target);
displayMethodResult(request, context, page, result, targetId);
} else {
final MethodTask methodTask = new MethodTask(context, target, action);
context.addTaskCrumb(methodTask);
request.forward(ForwardRequest.task(methodTask));
}
}
static void displayMethodResult(final Request request, final Context context, final Page page, final ObjectAdapter result, final String targetId) {
if (result == null) {
// TODO ask context for page to display - this will be the most
// recent object prior to the task
// null object - so just view service
request.forward(ForwardRequest.viewService(targetId));
} else {
if (result.getSpecification().isParentedOrFreeCollection()) {
final CollectionFacet facet = CollectionFacetUtils.getCollectionFacetFromSpec(result);
if (facet.size(result) == 1) {
forwardObjectResult(request, context, facet.firstElement(result));
} else {
forwardCollectionResult(request, context, result);
}
} else if (result.getSpecification().isValueOrIsParented()) {
// TODO deal with this object properly, it might not be just a
// simple string
final List<String> messages = context.getMessages();
messages.add(0, "Action returned: " + result.titleString());
request.forward(ForwardRequest.viewObject(targetId));
} else if (result.getSpecification().isNotCollection()) {
forwardObjectResult(request, context, result);
} else {
throw new UnknownTypeException(result.getSpecification().getFullIdentifier());
}
}
}
static void forwardCollectionResult(final Request request, final Context context, final ObjectAdapter coll) {
final String collectionId = context.mapCollection(coll);
request.forward(ForwardRequest.listCollection(collectionId));
}
static void forwardObjectResult(final Request request, final Context context, final ObjectAdapter resultAdapter) {
final String objectId = context.mapObject(resultAdapter);
if (resultAdapter.isTransient() && resultAdapter.getSpecification().persistability() == Persistability.USER_PERSISTABLE) {
request.forward(ForwardRequest.editObject(objectId));
} else if (resultAdapter.getSpecification().isService()) {
request.forward(ForwardRequest.viewService(objectId));
} else {
request.forward(ForwardRequest.viewObject(objectId));
}
}
@Override
public String name() {
return "method";
}
}