import org.springframework.samples.petclinic.model.BaseEntity; //导入依赖的package包/类
/**
 * 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);
}
 

import org.springframework.samples.petclinic.model.BaseEntity; //导入依赖的package包/类
/**
 * 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().intValue() == entityId && entityClass.isInstance(entity)) {
            return entity;
        }
    }
    throw new ObjectRetrievalFailureException(entityClass, entityId);
}
 

import org.springframework.samples.petclinic.model.BaseEntity; //导入依赖的package包/类
/**
 * 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);
}