/**
* 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.wicket.ui.components.widgets;
import java.util.Collection;
import java.util.List;
import com.google.common.base.Function;
import com.google.common.collect.Collections2;
import com.google.common.collect.Lists;
import com.vaynberg.wicket.select2.TextChoiceProvider;
import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager.ConcurrencyChecking;
import org.apache.isis.core.metamodel.adapter.oid.RootOid;
import org.apache.isis.core.metamodel.adapter.oid.RootOidDefault;
import org.apache.isis.viewer.wicket.model.mementos.ObjectAdapterMemento;
import org.apache.isis.viewer.wicket.model.models.ScalarModel;
public abstract class ObjectAdapterMementoProviderAbstract extends TextChoiceProvider<ObjectAdapterMemento> {
private static final long serialVersionUID = 1L;
private static final String NULL_PLACEHOLDER = "$$_isis_null_$$";
private static final String NULL_DISPLAY_TEXT = "";
private final ScalarModel scalarModel;
public ObjectAdapterMementoProviderAbstract(final ScalarModel scalarModel){
this.scalarModel = scalarModel;}
@Override
protected String getDisplayText(ObjectAdapterMemento choice) {
return choice != null? choice.getObjectAdapter(ConcurrencyChecking.NO_CHECK).titleString(null) : NULL_DISPLAY_TEXT;
}
@Override
protected Object getId(ObjectAdapterMemento choice) {
return choice != null? choice.toString(): NULL_PLACEHOLDER;
}
@Override
public void query(String term, int page, com.vaynberg.wicket.select2.Response<ObjectAdapterMemento> response) {
final List<ObjectAdapterMemento> mementos = Lists.newArrayList(obtainMementos(term));
// if not mandatory, and the list doesn't contain null already, then add it in.
if(!scalarModel.isRequired() && !mementos.contains(null)) {
mementos.add(0, null);
}
response.addAll(mementos);
}
protected abstract List<ObjectAdapterMemento> obtainMementos(String term);
@Override
public Collection<ObjectAdapterMemento> toChoices(Collection<String> ids) {
Function<String, ObjectAdapterMemento> function = new Function<String, ObjectAdapterMemento>() {
@Override
public ObjectAdapterMemento apply(String input) {
if(NULL_PLACEHOLDER.equals(input)) {
return null;
}
final RootOid oid = RootOidDefault.deString(input, ObjectAdapterMemento.getOidMarshaller());
return ObjectAdapterMemento.createPersistent(oid);
}
};
return Collections2.transform(ids, function);
}
}