com.caucho.rewrite.Not Maven / Gradle / Ivy
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/*
* Copyright (c) 1998-2018 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 Scott Ferguson
*/
package com.caucho.rewrite;
import com.caucho.config.ConfigException;
import com.caucho.config.Configurable;
import com.caucho.util.L10N;
import javax.annotation.PostConstruct;
import javax.servlet.http.HttpServletRequest;
/**
* True if the child predicate is false.
*
* Complex tests can be built using <resin:Not>,
* <resin:And> and <resin:Or> on top of simpler primary
* predicates.
*
*
* <web-app xmlns:resin="urn:java:com.caucho.resin">
*
* <resin:Forbidden regexp="^/local/">
* <resin:Not>
* <resin:IfAddress value="192.168.1.10"/>
* </resin:Not>
* </resin:Forbidden>
*
* </web-app>
*
*
* Predicates may be used for security and rewrite actions.
*/
@Configurable
public class Not implements RequestPredicate {
private static final L10N L = new L10N(Not.class);
private RequestPredicate _predicate;
public Not()
{
}
public Not(RequestPredicate predicate)
{
add(predicate);
}
/**
* Add a child predicate. The child must fail for Not to pass.
*
* @param predicate the child predicate
*/
@Configurable
public void add(RequestPredicate predicate)
{
if (_predicate != null)
throw new ConfigException(L.l("<resin:Not> requires a single value"));
_predicate = predicate;
}
@PostConstruct
public void init()
{
if (_predicate == null)
throw new ConfigException(L.l("<resin:Not> requires a value"));
}
/**
* True if the predicate matches.
*
* @param request the servlet request to test
*/
public boolean isMatch(HttpServletRequest request)
{
return ! _predicate.isMatch(request);
}
@Override
public String toString()
{
return getClass().getSimpleName() + "[" + _predicate + "]";
}
}