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/*
 * Copyright 2016-2018 52°North Initiative for Geospatial Open Source
 * Software 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.stream;

import java.util.Collection;
import java.util.Collections;
import java.util.Objects;
import java.util.Optional;

import javax.inject.Inject;
import javax.inject.Provider;

import org.n52.janmayen.component.AbstractSimilarityKeyRepository;
import org.n52.janmayen.http.MediaType;
import org.n52.janmayen.lifecycle.Constructable;

/**
 * TODO JavaDoc
 *
 * @author Christian Autermann
 */
public class StreamWriterRepository extends AbstractSimilarityKeyRepository> implements
        Constructable {

    private Collection>> writers;

    @Override
    public void init() {
        Objects.requireNonNull(this.writers);
        setProducers(this.writers);
    }

    public  Optional> getWriter(MediaType mediaType,
            Class type) {
        return getWriter(new StreamWriterKey(type, mediaType));
    }

    @SuppressWarnings("unchecked")
    public  Optional> getWriter(StreamWriterKey key) {
        return get(key).map(x -> (StreamWriter) x);
    }

    @Inject
    public void set(Optional>>> writers) {
        this.writers = writers.orElseGet(Collections::emptyList);
    }
}