/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.wicket.markup.head.filter;
import org.apache.wicket.markup.head.HeaderItem;
import org.apache.wicket.markup.head.filter.FilteringHeaderResponse.IHeaderResponseFilter;
/**
* A filter that takes another filter and always returns the opposite of another filter. This is
* useful where you have two filters (i.e. one for header and one for footer) and want to ensure
* that nothing ever has false returned for both cases.
*
* @author Jeremy Thomerson
*/
public class OppositeHeaderResponseFilter implements IHeaderResponseFilter
{
private final String name;
private final IHeaderResponseFilter other;
/**
* Construct.
*
* @param name
* the name used by this filter for its bucket o' stuff
* @param other
* the other filter to return the opposite of
*/
public OppositeHeaderResponseFilter(String name, IHeaderResponseFilter other)
{
this.name = name;
this.other = other;
}
@Override
public String getName()
{
return name;
}
@Override
public boolean accepts(HeaderItem item)
{
return !other.accepts(item);
}
}