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.controller.predicate;
  
  import java.util.Arrays;
  import java.util.HashSet;
  import java.util.Set;
  
  import org.apache.ambari.server.controller.spi.Predicate;
  import org.apache.ambari.server.controller.utilities.PredicateHelper;
  
  /**
   * Predicate which evaluates an array of predicates.
   */
  public abstract class ArrayPredicate implements BasePredicate {
    private final Predicate[] predicates;
    private final Set<String> propertyIds = new HashSet<>();
  
    // ----- Constructors -----------------------------------------------------
  
    /**
     * Constructor.
     *
     * @param predicates  the predicates
     */
    public ArrayPredicate(Predicate... predicates) {
      this.predicates = predicates;
      for (Predicate predicate : predicates) {
        propertyIds.addAll(PredicateHelper.getPropertyIds(predicate));
      }
    }
  
  
    // ----- BasePredicate ----------------------------------------------------
  
    @Override
    public Set<String> getPropertyIds() {
      return propertyIds;
    }
  
  
    // ----- PredicateVisitorAcceptor -----------------------------------------
  
    @Override
    public void accept(PredicateVisitor visitor) {
      visitor.acceptArrayPredicate(this);
    }
  
  
    // ----- ArrayPredicate ---------------------------------------------------
  
    public abstract String getOperator();
  
    /**
     * Factory method.
     *
     * @param predicates  the predicate array
     *
     * @return a new ArrayPredicate
     */
    public abstract Predicate create(Predicate... predicates);
  
  
    // ----- accessors --------------------------------------------------------
  
    /**
     * Get the predicates.
     *
     * @return the predicates
     */
    public Predicate[] getPredicates() {
      return predicates;
    }
  
  
    // ----- Object overrides --------------------------------------------------
  
    @Override
    public boolean equals(Object o) {
      if (this == o) return true;
      if (!(o instanceof ArrayPredicate)) return false;
  
      ArrayPredicate that = (ArrayPredicate) o;
  
      if (propertyIds != null ? !propertyIds.equals(that.propertyIds) : that.propertyIds != null) return false;
  
      // don't care about array order
      Set<Predicate> setThisPredicates = new HashSet<>(Arrays.asList(predicates));
      Set<Predicate> setThatPredicates = new HashSet<>(Arrays.asList(that.predicates));
      return setThisPredicates.equals(setThatPredicates);
    }
  
    @Override
    public int hashCode() {
      // don't care about array order
      int result = predicates != null ? new HashSet<>(Arrays.asList(predicates)).hashCode() : 0;
      result = 31 * result + (propertyIds != null ? propertyIds.hashCode() : 0);
      return result;
    }
  
    @Override
    public String toString() {
      StringBuilder sb = new StringBuilder();
  
      for (Predicate predicate : predicates) {
  
        boolean arrayPredicate = predicate instanceof ArrayPredicate;
  
        if (sb.length() > 0) {
          sb.append(" ").append(getOperator()).append(" ");
        }
  
        if (arrayPredicate) {
          sb.append("(").append(predicate).append(")");
        } else {
          sb.append(predicate);
        }
      }
      return sb.toString();
    }
  }
  