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.autocomplete;
  
  import java.util.Collections;
  import java.util.function.BiConsumer;
  
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.commons.internal.reflection._GenericResolver.ResolvedMethod;
  import org.apache.causeway.commons.internal.reflection._Reflect;
  import org.apache.causeway.core.metamodel.consent.InteractionInitiatedBy;
  import org.apache.causeway.core.metamodel.facetapi.Facet;
  import org.apache.causeway.core.metamodel.facetapi.FacetAbstract;
  import org.apache.causeway.core.metamodel.facetapi.FacetHolder;
  import org.apache.causeway.core.metamodel.facets.param.autocomplete.MinLengthUtil;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.core.metamodel.object.MmVisibilityUtils;
  import org.apache.causeway.core.metamodel.services.publishing.ExecutionPublisher;
  
  import lombok.extern.log4j.Log4j2;
  
  @Log4j2
  public abstract class AutoCompleteFacetAbstract
  extends FacetAbstract
  implements AutoCompleteFacet {
  
      private static final Class<? extends Facet> type() {
          return AutoCompleteFacet.class;
      }
  
      private final Class<?> repositoryClass;
      private final ResolvedMethod repositoryMethod;
  
      /**
       * lazily populated
       */
      private Integer minLength;
  
      public AutoCompleteFacetAbstract(
              final FacetHolder holder,
              final Class<?> repositoryClass,
              final ResolvedMethod repositoryMethod) {
  
          super(type(), holder);
  
          this.repositoryClass = repositoryClass;
          this.repositoryMethod = repositoryMethod;
      }
  
      public Class<?> getRepositoryClass() {
          return repositoryClass;
      }
  
      @Override
      public Can<ManagedObject> execute(
              final String search,
              final InteractionInitiatedBy interactionInitiatedBy) {
  
          var resultAdapter = executionPublisher()
          .withPublishingSuppressed(()->{
                  final Object list = _Reflect.invokeMethodOn(repositoryMethod.method(), getRepository(), search)
                          .ifFailure(e->log.warn("failure while executing auto-complete", e))
                          .getValue().orElseGet(Collections::emptyList);
                  return getObjectManager().adapt(list);
          });
  
          return MmVisibilityUtils.streamVisibleAdapters(resultAdapter, interactionInitiatedBy)
                  .collect(Can.toCan());
  
      }
  
      private Object getRepository() {
          return getServiceRegistry().lookupService(repositoryClass).orElse(null);
      }
  
      private ExecutionPublisher executionPublisher() {
          return getServiceRegistry().lookupServiceElseFail(ExecutionPublisher.class);
      }
  
      @Override
      public int getMinLength() {
          if(minLength == null) {
              minLength = MinLengthUtil.determineMinLength(repositoryMethod);
          }
          return minLength;
      }
  
      @Override
      public void visitAttributes(final BiConsumer<String, Object> visitor) {
          super.visitAttributes(visitor);
          visitor.accept("repositoryClass", repositoryClass);
          visitor.accept("repositoryMethod", repositoryMethod);
          visitor.accept("minLength", getMinLength());
      }
  }
  