/*
* Copyright (C) 2010 Google Inc.
*
* 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 com.google.greaze.rest.server;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import com.google.greaze.definition.HeaderMap;
import com.google.greaze.definition.HttpMethod;
import com.google.greaze.definition.UrlParams;
import com.google.greaze.definition.WebServiceSystemException;
import com.google.greaze.definition.rest.ResourceId;
import com.google.greaze.definition.rest.RestRequestBase;
import com.google.greaze.definition.rest.RestRequestSpec;
import com.google.greaze.definition.rest.RestResourceBase;
import com.google.greaze.webservice.server.RequestData;
import com.google.greaze.webservice.server.RequestReceiver;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonParseException;
/**
* Receives and parses a REST request at the server side on a {@link HttpServletRequest}.
*
* @author Inderjeet Singh
*/
public class RestRequestBaseReceiver<I extends ResourceId, R extends RestResourceBase<I, R>>
extends RequestReceiver {
public RestRequestBaseReceiver(GsonBuilder gsonBuilder, RestRequestSpec spec) {
super(gsonBuilder, spec);
}
protected RestRequestSpec getSpec() {
return (RestRequestSpec) spec;
}
public RestRequestBase<I, R> receive(HttpServletRequest request, I resourceId) {
try {
RequestData requestData = RequestData.create(request, spec, gson);
@SuppressWarnings("unchecked")
R requestBody = requestData.hasRequestBody()
? (R) requestData.getRequestBody().getSimpleBody() : null;
return createRequest(requestData.getMethod(), requestData.getHeaders(),
requestData.getUrlParams(), resourceId, requestBody, requestData.isInlined());
} catch (IOException e) {
throw new WebServiceSystemException(e);
} catch (JsonParseException e) {
// Not a Web service request
throw new WebServiceSystemException(e);
}
}
protected RestRequestBase<I, R> createRequest(HttpMethod method, HeaderMap requestHeaders,
UrlParams urlParams, I resourceId, R requestBody, boolean inlined) {
return new RestRequestBase<I, R>(method, requestHeaders, urlParams,
resourceId, requestBody, getSpec().getResourceType(), inlined);
}
}