/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.component.fhir;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;

import ca.uhn.fhir.parser.IParser;
import org.apache.camel.Exchange;
import org.apache.camel.spi.annotations.Dataformat;
import org.hl7.fhir.instance.model.api.IBaseResource;

@Dataformat("fhirXml")
public class FhirXmlDataFormat extends FhirDataFormat {

    @Override
    public void marshal(Exchange exchange, Object o, OutputStream outputStream) throws Exception {
        IBaseResource iBaseResource;
        if (!(o instanceof IBaseResource)) {
            iBaseResource = exchange.getContext().getTypeConverter().mandatoryConvertTo(IBaseResource.class, exchange, o);
        } else {
            iBaseResource = (IBaseResource) o;
        }

        IParser parser = getFhirContext().newXmlParser();
        configureParser(parser);
        parser.encodeResourceToWriter(iBaseResource, new OutputStreamWriter(outputStream));
        if (isContentTypeHeader()) {
            exchange.getMessage().setHeader(Exchange.CONTENT_TYPE, parser.getEncoding().getResourceContentTypeNonLegacy());
        }
    }

    @Override
    public Object unmarshal(Exchange exchange, InputStream inputStream) throws Exception {
        IParser parser = getFhirContext().newXmlParser();
        configureParser(parser);
        return parser.parseResource(new InputStreamReader(inputStream));
    }

    @Override
    public String getDataFormatName() {
        return "fhirXml";
    }
}
