/**
 * Copyright (c) Istituto Nazionale di Fisica Nucleare (INFN). 2006-2016
 *
 * 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
 *
 *     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.glite.security.voms.admin.persistence.dao.lookup;

/**
 * 
 * A VOMS DAO that supports lookup by certificate. 
 * 
 *
 * @param <T> the type of the returned entity 
 */
public interface FindByCertificateDAO<T> {

  /**
   * Implements lookup by certificate subject
   * 
   * @param certificateSubject the certificate subject
   * 
   * @return the entity linked to the certificate subject passed as argument, <code>null</code> if no entity is found
   */
  public T findBySubject(String certificateSubject);
  
  /**
   * Implements lookup by certificate subject and issuer
   * 
   * @param certificateSubject the certificate subject
   * @param certificateIssuer the certificate issuer
   * 
   * @return the entity linked to the certificate subject passed as argument, <code>null</code> if no entity is found
   */
  public T findBySubjectAndIssuer(String certificateSubject, String certificateIssuer);
  
}