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Hyperledger Fabric Java Chaincode Shim

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/*
 * Copyright 2019 IBM All Rights Reserved.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

package org.hyperledger.fabric.shim.impl;

import com.google.protobuf.ByteString;
import com.google.protobuf.InvalidProtocolBufferException;
import java.io.UncheckedIOException;
import java.util.function.Function;
import java.util.logging.Logger;
import org.hyperledger.fabric.protos.peer.QueryResponse;
import org.hyperledger.fabric.protos.peer.QueryResponseMetadata;
import org.hyperledger.fabric.protos.peer.QueryResultBytes;
import org.hyperledger.fabric.shim.ledger.QueryResultsIteratorWithMetadata;

/**
 * QueryResult Iterator.
 *
 * Implementation of {@link QueryResultsIteratorWithMetadata}, by extending
 * {@link org.hyperledger.fabric.shim.ledger.QueryResultsIterator} implementations, {@link QueryResultsIteratorImpl}
 *
 * @param 
 */
public final class QueryResultsIteratorWithMetadataImpl extends QueryResultsIteratorImpl
        implements QueryResultsIteratorWithMetadata {
    private static final Logger LOGGER = Logger.getLogger(QueryResultsIteratorWithMetadataImpl.class.getName());

    private final QueryResponseMetadata metadata;

    /**
     * @param handler
     * @param channelId
     * @param txId
     * @param responseBuffer
     * @param mapper
     */
    public QueryResultsIteratorWithMetadataImpl(
            final ChaincodeInvocationTask handler,
            final String channelId,
            final String txId,
            final ByteString responseBuffer,
            final Function mapper) {
        super(handler, channelId, txId, responseBuffer, mapper);
        try {
            final QueryResponse queryResponse = QueryResponse.parseFrom(responseBuffer);
            metadata = QueryResponseMetadata.parseFrom(queryResponse.getMetadata());
        } catch (final InvalidProtocolBufferException e) {
            LOGGER.warning("can't parse response metadata");
            throw new UncheckedIOException(e);
        }
    }

    @Override
    public QueryResponseMetadata getMetadata() {
        return metadata;
    }
}