/*
* Copyright 2002-2007 the original author or authors.
*
* Licensed 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.internna.iwebmvc.core.dwr;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.directwebremoting.WebContext;
import org.directwebremoting.WebContextFactory;
import org.directwebremoting.convert.BaseV20Converter;
import org.directwebremoting.extend.InboundContext;
import org.directwebremoting.extend.InboundVariable;
import org.directwebremoting.extend.MarshallException;
import org.directwebremoting.extend.NonNestedOutboundVariable;
import org.directwebremoting.extend.OutboundContext;
import org.directwebremoting.extend.OutboundVariable;
import org.directwebremoting.util.LocalUtil;
import org.internna.iwebmvc.core.IWebMvcException;
import org.internna.iwebmvc.core.crypto.Cipherer;
import org.internna.iwebmvc.core.crypto.Decipherer;
import org.internna.iwebmvc.utils.Assert;
import org.internna.iwebmvc.utils.ClassUtils;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.servlet.support.RequestContextUtils;
/**
* DWR converter for Class objects from/to an encrypted String
*
* @author Jose Noheda
*/
public class EncryptedClassConverter extends BaseV20Converter {
private static Decipherer decipherer;
private static Cipherer cipherer;
private static Log log = LogFactory.getLog(EncryptedClassConverter.class);
protected void initEncryption() {
WebContext webCtx = WebContextFactory.get();
WebApplicationContext springContext = RequestContextUtils.getWebApplicationContext(webCtx.getHttpServletRequest(), webCtx.getServletContext());
decipherer = (Decipherer) springContext.getBean("cryptographyManager");
cipherer = (Cipherer) decipherer;
if (log.isInfoEnabled()) log.info("Class converter found cipherer/decipherer: " + decipherer.getClass().getName());
}
public Object convertInbound(Class<?> paramType, InboundVariable data, InboundContext ctx) throws MarshallException {
if (decipherer == null) initEncryption();
String className = LocalUtil.decode(data.getValue());
try {
Assert.isEncrypted(decipherer, className);
return ClassUtils.forName(decipherer.decrypt(className));
} catch (Exception cne) {
throw new MarshallException(paramType, new IWebMvcException("Could not convert class from: " + className, cne));
}
}
public OutboundVariable convertOutbound(Object data, OutboundContext ctx) throws MarshallException {
if (decipherer == null) initEncryption();
try {
return new NonNestedOutboundVariable("'" + cipherer.encrypt(((Class<?>) data).getName()) + "'");
} catch (Exception e) {
throw new MarshallException(data.getClass(), new IWebMvcException("Could not generate encrypted class name from: " + data, e));
}
}
}