/*
* 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.spec;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import com.google.common.collect.Lists;
import org.apache.isis.core.metamodel.facets.object.membergroups.MemberGroupLayoutFacet;
import org.apache.isis.core.metamodel.services.grid.fixedcols.applib.Hint;
public final class ObjectSpecifications {
private ObjectSpecifications() {
}
public static List<String> orderByMemberGroups(
final ObjectSpecification objSpec,
final Set<String> groupNamesToOrder,
final Hint hint) {
final MemberGroupLayoutFacet facet = objSpec.getFacet(MemberGroupLayoutFacet.class);
final List<String> leftColumnGroupNames = Lists.newArrayList(groupNamesToOrder);
// not expected to happen
if(facet == null) {
return leftColumnGroupNames;
}
if(hint == Hint.MIDDLE) {
return facet.getColumnSpans().getMiddle()>0? facet.getMiddle(): Collections.<String>emptyList();
}
if(hint == Hint.RIGHT) {
return facet.getColumnSpans().getRight()>0? facet.getRight(): Collections.<String>emptyList();
}
// else left; per the requested order, including any groups not mentioned in either list,
// but excluding any groups in the middle or right columns
final List<String> groupNamedInRequiredOrder = facet.getLeft();
final List<String> order = order(leftColumnGroupNames, groupNamedInRequiredOrder);
if(facet.getColumnSpans().getMiddle() > 0) {
order.removeAll(facet.getMiddle());
}
if(facet.getColumnSpans().getRight() > 0) {
order.removeAll(facet.getRight());
}
return order;
}
static List<String> order(final List<String> valuesToOrder, final List<String> valuesInRequiredOrder) {
int i=0;
for(String memberGroup: valuesInRequiredOrder) {
if(valuesToOrder.contains(memberGroup)) {
// move to next position
valuesToOrder.remove(memberGroup);
valuesToOrder.add(i++, memberGroup);
}
}
return valuesToOrder;
}
}