content: /*
   * Copyright 2012-2019 the original author or authors.
   *
   * Licensed 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
   *
   *      https://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.springframework.samples.petclinic.service;
  
  import org.springframework.orm.ObjectRetrievalFailureException;
  import org.springframework.samples.petclinic.model.BaseEntity;
  
  import java.util.Collection;
  
  /**
   * Utility methods for handling entities. Separate from the BaseEntity class mainly
   * because of dependency on the ORM-associated ObjectRetrievalFailureException.
   *
   * @author Juergen Hoeller
   * @author Sam Brannen
   * @see org.springframework.samples.petclinic.model.BaseEntity
   * @since 29.10.2003
   */
  public abstract class EntityUtils {
  
  	/**
  	 * Look up the entity of the given class with the given id in the given collection.
  	 * @param entities the collection to search
  	 * @param entityClass the entity class to look up
  	 * @param entityId the entity id to look up
  	 * @return the found entity
  	 * @throws ObjectRetrievalFailureException if the entity was not found
  	 */
  	public static <T extends BaseEntity> T getById(Collection<T> entities, Class<T> entityClass, int entityId)
  			throws ObjectRetrievalFailureException {
  		for (T entity : entities) {
  			if (entity.getId() == entityId && entityClass.isInstance(entity)) {
  				return entity;
  			}
  		}
  		throw new ObjectRetrievalFailureException(entityClass, entityId);
  	}
  
  }
  