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// Licensed under the MIT license. See LICENSE file in the project root for full license information.

package de.bytefish.pgbulkinsert.pgsql.handlers;

import java.io.DataOutputStream;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.UUID;

public class UUIDValueHandler extends BaseValueHandler {

    @Override
    protected void internalHandle(DataOutputStream buffer, final UUID value) throws Exception {
        buffer.writeInt(16);

        ByteBuffer bb = toByteBuffer(value);

        buffer.writeInt(bb.getInt(0));
        buffer.writeShort(bb.getShort(4));
        buffer.writeShort(bb.getShort(6));

        buffer.write(Arrays.copyOfRange(bb.array(), 8, 16));
    }

    private static ByteBuffer toByteBuffer(UUID uuid) {
        ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
        bb.putLong(uuid.getMostSignificantBits());
        bb.putLong(uuid.getLeastSignificantBits());
        return bb;
    }

    @Override
    public int getLength(UUID value) {
        return 16;
    }
}