mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-05-26 13:20:57 +02:00
76 lines
1.9 KiB
Java
76 lines
1.9 KiB
Java
/*
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* Copyright 2009 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package seaweedfs.client.btree;
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import com.google.common.primitives.Longs;
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public class BlockPointer implements Comparable<BlockPointer> {
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private static final BlockPointer NULL = new BlockPointer(-1);
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public static BlockPointer start() {
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return NULL;
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}
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public static BlockPointer pos(long pos) {
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if (pos < -1) {
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throw new CorruptedCacheException("block pointer must be >= -1, but was" + pos);
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}
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if (pos == -1) {
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return NULL;
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}
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return new BlockPointer(pos);
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}
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private final long pos;
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private BlockPointer(long pos) {
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this.pos = pos;
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}
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public boolean isNull() {
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return pos < 0;
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}
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public long getPos() {
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return pos;
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}
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@Override
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public String toString() {
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return String.valueOf(pos);
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}
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@Override
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public boolean equals(Object obj) {
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if (obj == null || obj.getClass() != getClass()) {
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return false;
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}
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BlockPointer other = (BlockPointer) obj;
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return pos == other.pos;
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}
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@Override
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public int hashCode() {
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return Longs.hashCode(pos);
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}
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@Override
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public int compareTo(BlockPointer o) {
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return Longs.compare(pos, o.pos);
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}
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}
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