| /* |
| * Copyright 2017 HugeGraph Authors |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with this |
| * work for additional information regarding copyright ownership. The ASF |
| * licenses this file to You 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 com.baidu.hugegraph.computer.core.store.hgkvfile.file.reader; |
| |
| import com.baidu.hugegraph.computer.core.store.hgkvfile.entry.KvEntry; |
| import com.baidu.hugegraph.computer.core.store.hgkvfile.buffer.EntryIterator; |
| import com.baidu.hugegraph.computer.core.store.hgkvfile.entry.EntriesUtil; |
| import com.baidu.hugegraph.iterator.CIter; |
| import com.baidu.hugegraph.iterator.MapperIterator; |
| |
| public class HgkvDir4SubKvReaderImpl implements HgkvDirReader { |
| |
| private final HgkvDirReader reader; |
| |
| public HgkvDir4SubKvReaderImpl(String path, boolean useInlinePointer) { |
| this.reader = new HgkvDirReaderImpl(path, useInlinePointer, true); |
| } |
| |
| public HgkvDir4SubKvReaderImpl(String path) { |
| this(path, true); |
| } |
| |
| @Override |
| public EntryIterator iterator() { |
| return new KvEntryWithFirstSubKvIter(this.reader); |
| } |
| |
| private static class KvEntryWithFirstSubKvIter implements EntryIterator { |
| |
| private final CIter<KvEntry> entries; |
| |
| public KvEntryWithFirstSubKvIter(HgkvDirReader reader) { |
| this.entries = new MapperIterator<>(reader.iterator(), entry -> { |
| return EntriesUtil.kvEntryWithFirstSubKv(entry); |
| }); |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return this.entries.hasNext(); |
| } |
| |
| @Override |
| public KvEntry next() { |
| return this.entries.next(); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| this.entries.close(); |
| } |
| } |
| } |