/*
* 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.bdd.common.fixtures;
import java.util.ArrayList;
import java.util.List;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.facets.collections.modify.CollectionFacet;
import org.apache.isis.viewer.bdd.common.AliasRegistry;
import org.apache.isis.viewer.bdd.common.CellBinding;
import org.apache.isis.viewer.bdd.common.ScenarioValueException;
import com.google.common.collect.Iterables;
public class AbstractListFixturePeer extends AbstractFixturePeer {
private final String listAlias;
/**
* @see #collectionAdapters()
*/
private List<ObjectAdapter> objects;
public AbstractListFixturePeer(final AliasRegistry aliasesRegistry, final String listAlias,
final CellBinding... cellBindings) {
super(aliasesRegistry, cellBindings);
this.listAlias = listAlias;
}
protected boolean isValidListAlias() {
return getListAdapter() != null && isList();
}
protected ObjectAdapter getListAdapter() {
return getAliasRegistry().getAliased(listAlias);
}
public void assertIsList() throws ScenarioValueException {
if (!(getListAdapter() != null)) {
throw new ScenarioValueException("no such alias");
}
if (!isList()) {
throw new ScenarioValueException("not a list");
}
}
public boolean isList() {
return getCollectionFacet() != null;
}
/**
* Lazily populated, and populated only once.
*/
protected List<ObjectAdapter> collectionAdapters() {
if (objects == null) {
objects = new ArrayList<ObjectAdapter>();
Iterables.addAll(objects, collectionContents());
}
return objects;
}
private Iterable<ObjectAdapter> collectionContents() {
return getCollectionFacet().iterable(getListAdapter());
}
private CollectionFacet getCollectionFacet() {
return getListAdapter() != null ? getListAdapter().getSpecification().getFacet(CollectionFacet.class) : null;
}
}