| /* |
| * Druid - a distributed column store. |
| * Copyright (C) 2012, 2013 Metamarkets Group Inc. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| package io.druid.segment; |
| |
| import com.metamx.common.guava.ResourceClosingYielder; |
| import com.metamx.common.guava.Sequence; |
| import com.metamx.common.guava.Yielder; |
| import com.metamx.common.guava.YieldingAccumulator; |
| import com.metamx.common.guava.YieldingSequenceBase; |
| |
| import java.io.Closeable; |
| |
| /** |
| */ |
| public class ReferenceCountingSequence<T> extends YieldingSequenceBase<T> |
| { |
| private final Sequence<T> baseSequence; |
| private final ReferenceCountingSegment segment; |
| |
| public ReferenceCountingSequence(Sequence<T> baseSequence, ReferenceCountingSegment segment) |
| { |
| this.baseSequence = baseSequence; |
| this.segment = segment; |
| } |
| |
| @Override |
| public <OutType> Yielder<OutType> toYielder( |
| OutType initValue, YieldingAccumulator<OutType, T> accumulator |
| ) |
| { |
| Closeable closeable = segment.increment(); |
| return new ResourceClosingYielder<OutType>(baseSequence.toYielder(initValue, accumulator), closeable); |
| } |
| } |