/**
* Copyright (C) 2010 Orbeon, Inc.
*
* This program is free software; you can redistribute it and/or modify it under the terms of the
* GNU Lesser General Public License as published by the Free Software Foundation; either version
* 2.1 of the License, or (at your option) any later version.
*
* This program 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.
* See the GNU Lesser General Public License for more details.
*
* The full text of the license is available at http://www.gnu.org/copyleft/lesser.html
*/
package org.orbeon.oxf.processor;
import org.orbeon.oxf.common.OXFException;
import org.orbeon.oxf.externalcontext.ExternalContext;
import org.orbeon.oxf.pipeline.api.PipelineContext;
import org.orbeon.oxf.xml.XMLReceiver;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* NOTE: This processor depends on the Servlet API.
*/
public class ServletFilterGenerator extends ProcessorImpl {
public static final String FILTER_CHAIN = "filter-chain"; // used by ServletFilterGenerator and OPSServletFilter
public ServletFilterGenerator() {
addOutputInfo(new ProcessorInputOutputInfo(OUTPUT_DATA));
}
public ProcessorOutput createOutput(String name) {
final ProcessorOutput output = new ProcessorOutputImpl(ServletFilterGenerator.this, name) {
public void readImpl(PipelineContext context, XMLReceiver xmlReceiver) {
final FilterChain chain = (FilterChain) context.getAttribute(FILTER_CHAIN);
ExternalContext externalContext = (ExternalContext) context.getAttribute(org.orbeon.oxf.pipeline.api.PipelineContext.EXTERNAL_CONTEXT);
ServletRequest request = (ServletRequest) externalContext.getRequest().getNativeRequest();
ServletResponse response = (ServletResponse) externalContext.getResponse().getNativeResponse();
if (chain == null)
throw new OXFException("Filter chain not found. Make sure that ServletFilterGenerator is used only when ProcessorFilter is configured.");
// Include the result as XML
ServletResponseWrapper wrapper = new ServletResponseWrapper((HttpServletResponse) response);
try {
chain.doFilter(request, wrapper);
} catch (IOException e) {
throw new OXFException(e);
} catch (ServletException e) {
throw new OXFException(e);
}
// Parse the result
wrapper.parse(xmlReceiver);
}
};
addOutput(name, output);
return output;
}
}