org.springframework.webflow.context.servlet.HttpServletRequestParameterMap Maven / Gradle / Ivy
/*
* Copyright 2002-2006 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.springframework.webflow.context.servlet;
import java.util.Iterator;
import javax.servlet.http.HttpServletRequest;
import org.springframework.binding.collection.CompositeIterator;
import org.springframework.binding.collection.StringKeyedMapAdapter;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.webflow.core.collection.CollectionUtils;
/**
* Map backed by the Servlet HTTP request parameter map for accessing request
* parameters. Also provides support for multi-part requests, providing
* transparent access to the request "fileMap" as a request parameter entry.
*
* @author Keith Donald
*/
public class HttpServletRequestParameterMap extends StringKeyedMapAdapter {
/**
* The wrapped HTTP request.
*/
private HttpServletRequest request;
/**
* Create a new map wrapping the parameters of given request.
*/
public HttpServletRequestParameterMap(HttpServletRequest request) {
this.request = request;
}
protected Object getAttribute(String key) {
if (request instanceof MultipartHttpServletRequest) {
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest)request;
Object data = multipartRequest.getFileMap().get(key);
if (data != null) {
return data;
}
}
String[] parameters = request.getParameterValues(key);
if (parameters == null) {
return null;
} else if (parameters.length == 1) {
return parameters[0];
} else {
return parameters;
}
}
protected void setAttribute(String key, Object value) {
throw new UnsupportedOperationException("HttpServletRequest parameter maps are immutable");
}
protected void removeAttribute(String key) {
throw new UnsupportedOperationException("HttpServletRequest parameter maps are immutable");
}
protected Iterator getAttributeNames() {
if (request instanceof MultipartHttpServletRequest) {
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest)request;
CompositeIterator iterator = new CompositeIterator();
iterator.add(multipartRequest.getFileMap().keySet().iterator());
iterator.add(CollectionUtils.toIterator(request.getParameterNames()));
return iterator;
}
else {
return CollectionUtils.toIterator(request.getParameterNames());
}
}
}