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/*
 * Copyright (C) 2015-2022 52°North Spatial Information Research GmbH
 *
 * 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.n52.svalbard.encode;

import java.io.OutputStream;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import org.n52.janmayen.http.MediaTypes;
import org.n52.shetland.ogc.ows.service.OwsOperationKey;
import org.n52.shetland.ogc.ows.service.OwsServiceRequest;
import org.n52.svalbard.encode.exception.EncodingException;
import org.n52.svalbard.encode.exception.UnsupportedEncoderInputException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.base.Joiner;

/**
 * @author Carsten Hollmann
 * @since 5.0.0
 *
 * @param  the request type
 */
public abstract class AbstractRequestEncoder extends AbstractXmlResponseEncoder {

    private static final Logger LOGGER = LoggerFactory.getLogger(AbstractResponseEncoder.class);

    private final Set encoderKeys;

    /**
     * constructor
     *
     * @param service
     *            Service
     * @param version
     *            Service version
     * @param operation
     *            Service operation name
     * @param namespace
     *            Service XML schema namespace
     * @param prefix
     *            Service XML schema prefix
     * @param responseType
     *            Response type
     * @param validate
     *            Indicator if the created/encoded object should be validated
     */
    public AbstractRequestEncoder(String service, String version, String operation, String namespace, String prefix,
            Class responseType, boolean validate) {
        super(service, version, operation, namespace, prefix, responseType, validate);
        OwsOperationKey key = new OwsOperationKey(service, version, operation);
        this.encoderKeys = new HashSet<>(Arrays.asList(new XmlEncoderKey(namespace, responseType),
                new OperationRequestEncoderKey(key, MediaTypes.TEXT_XML),
                new OperationRequestEncoderKey(key, MediaTypes.APPLICATION_XML)));
        LOGGER.debug("Encoder for the following keys initialized successfully: {}!",
                Joiner.on(", ").join(encoderKeys));
    }

    /**
     * constructor
     *
     * @param service
     *            Service
     * @param version
     *            Service version
     * @param operation
     *            Service operation name
     * @param namespace
     *            Service XML schema namespace
     * @param prefix
     *            Service XML schema prefix
     * @param responseType
     *            Response type
     */
    public AbstractRequestEncoder(String service, String version, String operation, String namespace, String prefix,
            Class responseType) {
        this(service, version, operation, namespace, prefix, responseType, false);
    }

    @Override
    public Set getKeys() {
        return Collections.unmodifiableSet(encoderKeys);
    }

    @Override
    public void encode(T request, OutputStream outputStream, EncodingContext encodingValues) throws EncodingException {
        if (request == null) {
            throw new UnsupportedEncoderInputException(this);
        }
        create(request, outputStream, encodingValues);
    }
}