/**
 * 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.operations.users;

import org.glite.security.voms.admin.operations.BaseUserAdministrativeOperation;
import org.glite.security.voms.admin.operations.VOMSContext;
import org.glite.security.voms.admin.operations.VOMSPermission;
import org.glite.security.voms.admin.persistence.dao.VOMSUserDAO;

public class FindUserOperation extends BaseUserAdministrativeOperation {

  Long id;

  String dn = null;

  String caDN = null;

  String emailAddress = null;

  private FindUserOperation(Long userId) {

    id = userId;
    setAuthorizedUser(VOMSUserDAO.instance().findById(userId));

  }

  private FindUserOperation(String dn, String ca) {

    this.dn = dn;
    this.caDN = ca;

    setAuthorizedUser(VOMSUserDAO.instance().lookup(dn, caDN));

  }

  private FindUserOperation(String emailAddress) {

    this.emailAddress = emailAddress;
  }

  protected Object doExecute() {

    if (dn == null)

      return VOMSUserDAO.instance().findById(id);

    else if (emailAddress == null)

      return VOMSUserDAO.instance().lookup(dn, caDN);

    else
      return VOMSUserDAO.instance().findByEmail(emailAddress);

  }

  public static FindUserOperation instance(Long id) {

    return new FindUserOperation(id);
  }

  public static FindUserOperation instance(String dn, String caDN) {

    return new FindUserOperation(dn, caDN);
  }

  public static FindUserOperation instance(String emailAddress) {

    return new FindUserOperation(emailAddress);
  }

  @Override
  protected void setupPermissions() {

    addRequiredPermission(VOMSContext.getVoContext(), VOMSPermission
      .getContainerReadPermission().setMembershipReadPermission());

  }

}