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 org.apache.ambari.server.controller.spi.Resource;
  
  
  /**
   * Predicate that checks if a given value is less than or equal to a {@link Resource} property.
   */
  public class LessEqualsPredicate<T> extends ComparisonPredicate<T> {
  
    /**
     * Construct a LessEqualsPredicate.
     *
     * @param propertyId  the property id
     * @param value       the value
     *
     * @throws IllegalArgumentException if the given value is null
     */
    public LessEqualsPredicate(String propertyId, Comparable<T> value) {
      super(propertyId, value);
      if (value == null) {
        throw new IllegalArgumentException("Value can't be null.");
      }
    }
  
    @Override
    public boolean evaluate(Resource resource) {
      Object propertyValue = resource.getPropertyValue(getPropertyId());
      return propertyValue != null && compareValueTo(propertyValue) >= 0;
    }
  
    @Override
    public String getOperator() {
      return "<=";
    }
  
    @Override
    public ComparisonPredicate<T> copy(String propertyId) {
      return new LessEqualsPredicate<>(propertyId, getValue());
    }
  }
  