/*
 * Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Sam
 */

package com.caucho.server.rewrite;

import com.caucho.util.L10N;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Locale;
import java.util.regex.Pattern;

/**
* A rewrite condition that passes if the value of the Locale matches
 * a regexp.
*/
public class LocaleCondition
  extends AbstractCondition
{
  private static final L10N L = new L10N(LocaleCondition.class);

  private final Pattern _regexp;
  private boolean _sendVary = true;

  LocaleCondition(String regexp)
  {
    _regexp = Pattern.compile(regexp, Pattern.CASE_INSENSITIVE);
  }

  public String getTagName()
  {
    return "locale";
  }

  public void setSendVary(boolean sendVary)
  {
    _sendVary = sendVary;
  }

  public boolean isMatch(HttpServletRequest request,
                         HttpServletResponse response)
  {
    if (_sendVary)
      addHeaderValue(response, "Vary", "Accept-Language");

    Locale locale = request.getLocale();

    if (locale == null)
      return false;
    else
      return _regexp.matcher(locale.toString()).find();
  }
}