| /* |
| * 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 org.apache.flink.table.runtime.util; |
| |
| import org.apache.flink.core.memory.MemorySegment; |
| import org.apache.flink.core.memory.MemorySegmentFactory; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| */ |
| public class BytesHashMapSpillMemorySegmentPool implements MemorySegmentPool { |
| |
| private final List<MemorySegment> segments; |
| private final int pageSize; |
| private int allocated; |
| |
| public BytesHashMapSpillMemorySegmentPool(int pageSize) { |
| this.segments = Collections.EMPTY_LIST; |
| this.pageSize = pageSize; |
| this.allocated = 0; |
| } |
| |
| public BytesHashMapSpillMemorySegmentPool(List<MemorySegment> memorySegments) { |
| this.segments = memorySegments; |
| this.pageSize = memorySegments.get(0).size(); |
| this.allocated = 0; |
| } |
| |
| @Override |
| public MemorySegment nextSegment() { |
| allocated++; |
| if (allocated <= segments.size()) { |
| return segments.get(allocated - 1); |
| } else { |
| return MemorySegmentFactory.wrap(new byte[pageSize()]); |
| } |
| } |
| |
| @Override |
| public void returnAll(List<MemorySegment> memory) { |
| throw new UnsupportedOperationException("not support!"); |
| } |
| |
| @Override |
| public int pageSize() { |
| return pageSize; |
| } |
| |
| @Override |
| public void clear() { |
| allocated = 0; |
| } |
| } |