| /* |
| * 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.util.UUID; |
| |
| public abstract class TypeSizes |
| { |
| public static final TypeSizes NATIVE = new NativeDBTypeSizes(); |
| public static final TypeSizes VINT = new VIntEncodedTypeSizes(); |
| |
| private static final int BOOL_SIZE = 1; |
| private static final int SHORT_SIZE = 2; |
| private static final int INT_SIZE = 4; |
| private static final int LONG_SIZE = 8; |
| private static final int UUID_SIZE = 16; |
| |
| public abstract int sizeof(boolean value); |
| public abstract int sizeof(short value); |
| public abstract int sizeof(int value); |
| public abstract int sizeof(long value); |
| public abstract int sizeof(UUID value); |
| |
| /** assumes UTF8 */ |
| public int sizeof(String value) |
| { |
| int length = encodedUTF8Length(value); |
| assert length <= Short.MAX_VALUE; |
| return sizeof((short) length) + length; |
| } |
| |
| public static int encodedUTF8Length(String st) |
| { |
| int strlen = st.length(); |
| int utflen = 0; |
| for (int i = 0; i < strlen; i++) |
| { |
| int c = st.charAt(i); |
| if ((c >= 0x0001) && (c <= 0x007F)) |
| utflen++; |
| else if (c > 0x07FF) |
| utflen += 3; |
| else |
| utflen += 2; |
| } |
| return utflen; |
| } |
| |
| public int sizeofWithShortLength(ByteBuffer value) |
| { |
| return sizeof((short) value.remaining()) + value.remaining(); |
| } |
| |
| public int sizeofWithLength(ByteBuffer value) |
| { |
| return sizeof(value.remaining()) + value.remaining(); |
| } |
| |
| public static class NativeDBTypeSizes extends TypeSizes |
| { |
| public int sizeof(boolean value) |
| { |
| return BOOL_SIZE; |
| } |
| |
| public int sizeof(short value) |
| { |
| return SHORT_SIZE; |
| } |
| |
| public int sizeof(int value) |
| { |
| return INT_SIZE; |
| } |
| |
| public int sizeof(long value) |
| { |
| return LONG_SIZE; |
| } |
| |
| public int sizeof(UUID value) |
| { |
| return UUID_SIZE; |
| } |
| } |
| |
| public static class VIntEncodedTypeSizes extends TypeSizes |
| { |
| private static final int BOOL_SIZE = 1; |
| |
| public int sizeofVInt(long i) |
| { |
| if (i >= -112 && i <= 127) |
| return 1; |
| |
| int size = 0; |
| int len = -112; |
| if (i < 0) |
| { |
| i ^= -1L; // take one's complement' |
| len = -120; |
| } |
| long tmp = i; |
| while (tmp != 0) |
| { |
| tmp = tmp >> 8; |
| len--; |
| } |
| size++; |
| len = (len < -120) ? -(len + 120) : -(len + 112); |
| size += len; |
| return size; |
| } |
| |
| public int sizeof(long i) |
| { |
| return sizeofVInt(i); |
| } |
| |
| public int sizeof(boolean i) |
| { |
| return BOOL_SIZE; |
| } |
| |
| public int sizeof(short i) |
| { |
| return sizeofVInt(i); |
| } |
| |
| public int sizeof(int i) |
| { |
| return sizeofVInt(i); |
| } |
| |
| public int sizeof(UUID value) |
| { |
| return sizeofVInt(value.getMostSignificantBits()) + sizeofVInt(value.getLeastSignificantBits()); |
| } |
| } |
| } |