content: /*
   *  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.causeway.core.metamodel.facets.object.navchild;
  
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.core.metamodel.context.MetaModelContext;
  import org.apache.causeway.core.metamodel.facetapi.FacetUtil;
  import org.apache.causeway.core.metamodel.postprocessors.MetaModelPostProcessorAbstract;
  import org.apache.causeway.core.metamodel.spec.ObjectSpecification;
  import org.apache.causeway.core.metamodel.spec.feature.MixedIn;
  import org.apache.causeway.core.metamodel.spec.feature.ObjectAssociation;
  import org.apache.causeway.core.metamodel.spec.feature.ObjectMember;
  
  /**
   * Installs the {@link NavigableSubtreeFacet} 
   * as aggregated via {@link NavigableSubtreeSequenceFacet} collected from {@link ObjectAssociation}s.
   * {@link ObjectMember}s of the {@link ObjectSpecification}.
   */
  public class NavigableSubtreeFacetPostProcessor extends MetaModelPostProcessorAbstract {
  
      public NavigableSubtreeFacetPostProcessor(final MetaModelContext metaModelContext) {
          super(metaModelContext);
      }
  
      @Override
      public void postProcessObject(final ObjectSpecification objSpec) {
          var navigableSubtreeSequenceFacets = 
              objSpec.streamAssociations(MixedIn.EXCLUDED)
                  .flatMap(assoc->assoc.lookupFacet(NavigableSubtreeSequenceFacet.class).stream())
                  .collect(Can.toCan());
          
          FacetUtil.addFacetIfPresent(NavigableSubtreeFacet.create(navigableSubtreeSequenceFacets, objSpec));
      }
  
  }
  