| /* |
| * 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.cassandra.db; |
| |
| import java.nio.ByteBuffer; |
| import java.security.MessageDigest; |
| import java.util.Objects; |
| |
| import org.apache.cassandra.utils.FBUtilities; |
| import org.apache.cassandra.utils.ObjectSizes; |
| |
| public abstract class AbstractClusteringPrefix implements ClusteringPrefix |
| { |
| protected static final ByteBuffer[] EMPTY_VALUES_ARRAY = new ByteBuffer[0]; |
| |
| private static final long EMPTY_SIZE = ObjectSizes.measure(new Clustering(EMPTY_VALUES_ARRAY)); |
| |
| protected final Kind kind; |
| protected final ByteBuffer[] values; |
| |
| protected AbstractClusteringPrefix(Kind kind, ByteBuffer[] values) |
| { |
| this.kind = kind; |
| this.values = values; |
| } |
| |
| public Kind kind() |
| { |
| return kind; |
| } |
| |
| public ClusteringPrefix clustering() |
| { |
| return this; |
| } |
| |
| public int size() |
| { |
| return values.length; |
| } |
| |
| public ByteBuffer get(int i) |
| { |
| return values[i]; |
| } |
| |
| public ByteBuffer[] getRawValues() |
| { |
| return values; |
| } |
| |
| public int dataSize() |
| { |
| int size = 0; |
| for (int i = 0; i < size(); i++) |
| { |
| ByteBuffer bb = get(i); |
| size += bb == null ? 0 : bb.remaining(); |
| } |
| return size; |
| } |
| |
| public void digest(MessageDigest digest) |
| { |
| for (int i = 0; i < size(); i++) |
| { |
| ByteBuffer bb = get(i); |
| if (bb != null) |
| digest.update(bb.duplicate()); |
| } |
| FBUtilities.updateWithByte(digest, kind().ordinal()); |
| } |
| |
| public long unsharedHeapSize() |
| { |
| return EMPTY_SIZE + ObjectSizes.sizeOnHeapOf(values); |
| } |
| |
| public long unsharedHeapSizeExcludingData() |
| { |
| return EMPTY_SIZE + ObjectSizes.sizeOnHeapExcludingData(values); |
| } |
| |
| @Override |
| public final int hashCode() |
| { |
| int result = 31; |
| for (int i = 0; i < size(); i++) |
| result += 31 * Objects.hashCode(get(i)); |
| return 31 * result + Objects.hashCode(kind()); |
| } |
| |
| @Override |
| public final boolean equals(Object o) |
| { |
| if(!(o instanceof ClusteringPrefix)) |
| return false; |
| |
| ClusteringPrefix that = (ClusteringPrefix)o; |
| if (this.kind() != that.kind() || this.size() != that.size()) |
| return false; |
| |
| for (int i = 0; i < size(); i++) |
| if (!Objects.equals(this.get(i), that.get(i))) |
| return false; |
| |
| return true; |
| } |
| } |