/**
 * 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.taglib;

import java.io.IOException;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.tagext.TagSupport;

import org.glite.security.voms.admin.configuration.VOMSConfiguration;
import org.glite.security.voms.admin.configuration.VOMSConfigurationConstants;

public class VersionTag extends TagSupport {

  /**
     * 
     */
  private static final long serialVersionUID = 1L;

  public VersionTag() {

    super();
  }

  @Override
  public int doStartTag() throws JspException {

    VOMSConfiguration conf = VOMSConfiguration.instance();

    String version = conf
      .getString(VOMSConfigurationConstants.VOMS_ADMIN_SERVER_VERSION);

    try {

      if (version == null)

        pageContext.getOut().print("undefined version");

      else
        pageContext.getOut().print(version);

    } catch (IOException e) {

      throw new JspTagException("Error writing version information!");
    }

    return SKIP_BODY;
  }

}