DelegatingSecurityFilter.java

/**
 * Licensed to the Austrian Association for Software Tool Integration (AASTI)
 * under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright
 * ownership. The AASTI 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.openengsb.ui.common.util;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DelegatingSecurityFilter implements Filter {
    private static final Logger LOGGER = LoggerFactory.getLogger(DelegatingSecurityFilter.class);

    private Filter securityFilterChain;

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
        ServletException {
        Filter delegatedFilter = getFilterBean();
        LOGGER.debug("delegate to org.springframework.security.web.filterChainProxy");
        delegatedFilter.doFilter(request, response, chain);
    }

    private Filter getFilterBean() {
        if (securityFilterChain == null) {
            throw new IllegalStateException("Could not load required security filter.");
        }
        return securityFilterChain;
    }

    public void setSecurityFilterChain(Filter securityFilterChain) {
        this.securityFilterChain = securityFilterChain;
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void destroy() {
    }

}