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.Set;
  
  import org.apache.ambari.server.controller.spi.Predicate;
  import org.apache.ambari.server.controller.utilities.PredicateHelper;
  
  /**
   * Predicate that operates on one other predicate.
   */
  public abstract class UnaryPredicate implements BasePredicate {
    private final Predicate predicate;
  
    public UnaryPredicate(Predicate predicate) {
      assert(predicate != null);
      this.predicate = predicate;
    }
  
    public Predicate getPredicate() {
      return predicate;
    }
  
    @Override
    public Set<String> getPropertyIds() {
      return PredicateHelper.getPropertyIds(predicate);
    }
  
    @Override
    public void accept(PredicateVisitor visitor) {
      visitor.acceptUnaryPredicate(this);
    }
  
    @Override
    public boolean equals(Object o) {
      if (this == o) return true;
      if (!(o instanceof UnaryPredicate)) return false;
  
      UnaryPredicate that = (UnaryPredicate) o;
  
      return predicate.equals(that.predicate);
    }
  
    @Override
    public int hashCode() {
      return predicate.hashCode();
    }
  
    public abstract String getOperator();
  
  
    // ----- Object overrides --------------------------------------------------
  
    @Override
    public String toString() {
      return getOperator() + "(" + getPredicate() + ")";
    }
  }
  