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.ambari.server.collections.functors;
  
  import java.util.Collection;
  import java.util.Iterator;
  import java.util.Map;
  
  import org.apache.ambari.server.collections.PredicateUtils;
  import org.apache.commons.collections4.Predicate;
  import org.apache.commons.collections4.functors.PredicateDecorator;
  
  /**
   * {@link AndPredicate} wraps {@link org.apache.commons.collections4.functors.AndPredicate} to
   * provide additional functionality like serializing to and from a Map and JSON formatted data.
   * <p>
   * See {@link DelegatedMultiplePredicateContainer}
   */
  public class AndPredicate extends DelegatedMultiplePredicateContainer {
    /**
     * The name of this {@link org.apache.ambari.server.collections.Predicate} implementation
     */
    public static final String NAME = "and";
  
    /**
     * Creates a new {@link AndPredicate} using the given {@link Map} of data.
     * <p>
     * It is expected that the map contains a single {@link java.util.Map.Entry} where the key name
     * is "and" and the value is a {@link Collection} of {@link Map}s representing the contained
     * predicates.
     *
     * @return a new {@link AndPredicate}
     */
    public static AndPredicate fromMap(Map<String, Object> map) {
      Object data = (map == null) ? null : map.get(NAME);
  
      if (data == null) {
        throw new IllegalArgumentException("Missing data for '" + NAME + "' operation");
      } else if (data instanceof Collection) {
        Collection<?> collection = (Collection) data;
        if (collection.size() == 2) {
          Iterator<?> iterator = collection.iterator();
          Object d1 = iterator.next();
          Object d2 = iterator.next();
  
          if ((d1 instanceof Map) && (d2 instanceof Map)) {
            return new AndPredicate(PredicateUtils.fromMap((Map) d1), PredicateUtils.fromMap((Map) d2));
          } else {
            throw new IllegalArgumentException(String.format("Unexpected data types for predicates: %s and %s", d1.getClass().getName(), d2.getClass().getName()));
          }
        } else {
          throw new IllegalArgumentException(String.format("Missing data for '" + NAME + "' operation - 2 predicates are needed, %d found", collection.size()));
        }
      } else {
        throw new IllegalArgumentException(String.format("Unexpected data type for '" + NAME + "' operation - %s", data.getClass().getName()));
      }
    }
  
    /**
     * Constructor.
     *
     * @param predicate1 the first predicate to process
     * @param predicate2 the second predicate to process (if the first one yields <code>true</code>
     */
    public AndPredicate(Predicate predicate1, Predicate predicate2) {
      super(NAME,
          (PredicateDecorator) org.apache.commons.collections4.functors.AndPredicate.andPredicate(predicate1, predicate2));
    }
  
    @Override
    public int hashCode() {
      return super.hashCode() + this.getClass().getName().hashCode();
    }
  
    @Override
    public boolean equals(Object obj) {
      return (obj == this) ||
          ((obj != null) && (super.equals(obj) && this.getClass().isInstance(obj) && (hashCode() == obj.hashCode())));
    }
  }
  