/*
* 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.config.ConfigException;
import com.caucho.server.http.CauchoResponse;
import com.caucho.util.L10N;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
abstract public class AbstractCondition
implements Condition
{
private static final L10N L = new L10N(AbstractCondition.class);
public void init()
{
}
public String getTagName()
{
return getClass().getName();
}
/**
* Throws an exception if the passed value is null.
*/
protected void required(Object value, String name)
throws ConfigException
{
if (value == null)
throw new ConfigException(L.l("{0} requires '{1}' attribute.",
getTagName(), name));
}
protected void addHeaderValue(HttpServletResponse response, String header, String value)
{
while (response instanceof HttpServletResponseWrapper)
response = (HttpServletResponse) ((HttpServletResponseWrapper) response).getResponse();
if (response instanceof CauchoResponse) {
CauchoResponse res = (CauchoResponse) response;
String currentValue = res.getHeader(header);
if (currentValue != null) {
if (currentValue.equals(value)
|| (currentValue.contains(value + ","))
|| (currentValue.contains(", " + value))) {
}
else {
res.setHeader(header, currentValue + ", " + value);
}
}
else {
res.setHeader(header, value);
}
}
else {
response.addHeader(header, value);
}
}
public void destroy()
{
}
}