/**
 * 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.groups;

import org.glite.security.voms.admin.operations.BaseVomsOperation;
import org.glite.security.voms.admin.operations.VOMSContext;
import org.glite.security.voms.admin.operations.VOMSPermission;
import org.glite.security.voms.admin.persistence.dao.VOMSGroupDAO;
import org.glite.security.voms.admin.persistence.model.VOMSGroup;
import org.glite.security.voms.admin.util.PathNamingScheme;

public class FindGroupOperation extends BaseVomsOperation {

  Long id = null;

  String name = null;

  private FindGroupOperation(Long id) {

    this.id = id;

  }

  private FindGroupOperation(String name) {

    this.name = name;
  }

  protected Object doExecute() {

    if (id != null)
      return VOMSGroupDAO.instance().findById(id);

    if (name != null)
      return VOMSGroupDAO.instance().findByName(name);

    return null;
  }

  public static FindGroupOperation instance(Long id) {

    return new FindGroupOperation(id);
  }

  public static FindGroupOperation instance(String name) {

    return new FindGroupOperation(name);
  }

  protected void setupPermissions() {

    if (name != null) {

      String parentGroupName = PathNamingScheme.getParentGroupName(name);

      VOMSContext ctxt = VOMSContext.instance(VOMSGroupDAO.instance()
        .findByName(parentGroupName));

      addRequiredPermission(ctxt, VOMSPermission.getContainerReadPermission());

    } else if (id != null) {

      VOMSGroup parentGroup = VOMSGroupDAO.instance().findById(id).getParent();

      VOMSContext ctxt = VOMSContext.instance(parentGroup);

      addRequiredPermission(ctxt, VOMSPermission.getContainerReadPermission());

    }

    return;
  }
}