/*
 * #%L
 * Protempa Framework
 * %%
 * Copyright (C) 2012 - 2013 Emory University
 * %%
 * 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%
 */
package org.protempa;

import java.util.List;
import org.protempa.proposition.Proposition;

/**
 * After propositions have been assembled for a given key id, this
 * {@link PropositionDataStreamerProcessor} assembles all of the references
 * for each proposition.
 * 
 * @author Andrew Post
 */
final class ReferenceLinkerPropositionDataStreamerProcessor
        extends PropositionDataStreamerProcessor implements AutoCloseable {
    
    private final DataStreamer refsStreamer;
    private final RefDataStreamerProcessor refsProcessor;
    private final List<? extends DataStreamingEventIterator<UniqueIdPair>> refItrs;

    ReferenceLinkerPropositionDataStreamerProcessor(
            List<? extends DataStreamingEventIterator<UniqueIdPair>> refItrs) {
        assert refItrs != null : "refIrs cannot be null";
        this.refsStreamer = new DataStreamer();
        this.refsProcessor = new RefDataStreamerProcessor();
        this.refItrs = refItrs;
    }

    @Override
    protected void fireKeyCompleted(String keyId, List<Proposition> data)
            throws DataSourceReadException {
        this.refsProcessor.setPropositions(data);
        this.refsProcessor.setKeyId(keyId);
        this.refsStreamer.doStream(this.refsProcessor, this.refItrs);
        this.refsProcessor.clear();
        super.fireKeyCompleted(keyId, data);
    }

    @Override
    public void close() {
        super.close();
        this.refsStreamer.close();
    }
    
}
