ca.uhn.fhir.jaxrs.server.util.JaxRsResponse.java Source code

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Here is the source code for ca.uhn.fhir.jaxrs.server.util.JaxRsResponse.java

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package ca.uhn.fhir.jaxrs.server.util;

import static org.apache.commons.lang3.StringUtils.isNotBlank;

/*
 * #%L
 * HAPI FHIR JAX-RS Server
 * %%
 * Copyright (C) 2014 - 2016 University Health Network
 * %%
 * 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.
 * #L%
 */

import java.io.IOException;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.util.Map.Entry;

import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;

import org.apache.commons.lang3.StringUtils;
import org.hl7.fhir.instance.model.api.IBaseBinary;

import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.parser.IParser;
import ca.uhn.fhir.rest.api.MethodOutcome;
import ca.uhn.fhir.rest.method.ParseAction;
import ca.uhn.fhir.rest.server.Constants;
import ca.uhn.fhir.rest.server.EncodingEnum;
import ca.uhn.fhir.rest.server.RestfulResponse;
import ca.uhn.fhir.rest.server.RestfulServerUtils;

/**
 * The JaxRsResponse is a jax-rs specific implementation of the RestfulResponse.
 * 
 * @author Peter Van Houte | peter.vanhoute@agfa.com | Agfa Healthcare
 */
public class JaxRsResponse extends RestfulResponse<JaxRsRequest> {

    /**
     * The constructor
     * 
     * @param request the JaxRs Request
     */
    public JaxRsResponse(JaxRsRequest request) {
        super(request);
    }

    /**
     * The response writer is a simple String Writer. All output is configured
     * by the server.
     */
    @Override
    public Writer getResponseWriter(int theStatusCode, String theStatusMessage, String theContentType,
            String theCharset, boolean theRespondGzip) throws UnsupportedEncodingException, IOException {
        return new StringWriter();
    }

    @Override
    public Response sendWriterResponse(int theStatus, String theContentType, String theCharset, Writer theWriter) {
        ResponseBuilder builder = buildResponse(theStatus);
        if (isNotBlank(theContentType)) {
            String charContentType = theContentType + "; charset="
                    + StringUtils.defaultIfBlank(theCharset, Constants.CHARSET_NAME_UTF8);
            builder.header(Constants.HEADER_CONTENT_TYPE, charContentType);
        }
        builder.entity(theWriter.toString());
        Response retVal = builder.build();
        return retVal;
    }

    @Override
    public Response sendAttachmentResponse(IBaseBinary bin, int statusCode, String contentType) throws IOException {
        ResponseBuilder response = buildResponse(statusCode);
        if (bin.getContent() != null && bin.getContent().length > 0) {
            response.header(Constants.HEADER_CONTENT_TYPE, contentType).entity(bin.getContent());
        }
        return response.build();
    }

    @Override
    public Response returnResponse(ParseAction<?> outcome, int operationStatus, boolean allowPrefer,
            MethodOutcome response, String resourceName) throws IOException {
        StringWriter writer = new StringWriter();
        if (outcome != null) {
            FhirContext fhirContext = getRequestDetails().getServer().getFhirContext();
            IParser parser = RestfulServerUtils.getNewParser(fhirContext, getRequestDetails());
            outcome.execute(parser, writer);
        }
        return sendWriterResponse(operationStatus, getParserType(), null, writer);
    }

    protected String getParserType() {
        EncodingEnum encodingEnum = RestfulServerUtils.determineResponseEncodingWithDefault(getRequestDetails())
                .getEncoding();
        return encodingEnum == EncodingEnum.JSON ? MediaType.APPLICATION_JSON : MediaType.APPLICATION_XML;
    }

    private ResponseBuilder buildResponse(int statusCode) {
        ResponseBuilder response = Response.status(statusCode);
        for (Entry<String, String> header : getHeaders().entrySet()) {
            response.header(header.getKey(), header.getValue());
        }
        return response;
    }

}