treilly 2004/05/30 23:55:15 Added: id/src/java/org/apache/commons/id/uuid Constants.java Log: Constants interface with constants used in multiple classes Revision Changes Path 1.1 jakarta-commons-sandbox/id/src/java/org/apache/commons/id/uuid/Constants.java Index: Constants.java =================================================================== /* * Copyright 2004 The Apache Software Foundation. * * Licensed 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.commons.id.uuid; /** * <p>Constant values commonly needed in the uuid classes.</p> * * @author Commons-Id Team * @version $Revision: 1.1 $ $Date: 2004/05/31 06:55:15 $ * */ public interface Constants { //** Magic number constants /** Bits in a UUID. */ int UUID_BIT_LENGTH = 128; /** Number of bytes in a UUID. */ int UUID_BYTE_LENGTH = 16; //** Formatting and validation constants /** Chars in a UUID String. */ int UUID_UNFORMATTED_LENGTH = 32; /** Chars in a UUID String. */ int UUID_FORMATTED_LENGTH = 36; /** Token length of '-' separated tokens. */ int TOKENS_IN_UUID = 5; /** Array to check tokenized UUID's segment lengths */ int[] TOKEN_LENGTHS = {8, 4, 4, 4, 12}; /** Insertion point 1 for dashes in the string format */ int FORMAT_POSITION1 = 8; /** Insertion point 2 for dashes in the string format */ int FORMAT_POSITION2 = 13; /** Insertion point 3 for dashes in the string format */ int FORMAT_POSITION3 = 18; /** Insertion point 4 for dashes in the string format */ int FORMAT_POSITION4 = 23; /** The string prefix for a urn UUID identifier. */ String URN_PREFIX = "urn:uuid:"; //** UUID Variant Constants /** UUID variant bits described in the IETF Draft MSB order, * this is the "Reserved, NCS backward compatibility field" 0 x x with unknown bits as 0*/ int VARIANT_NCS_COMPAT = 0; /** UUID variant bits described in the IETF Draft MSB order, * this is the IETF Draft memo variant field 1 0 x with unknown bits as 0*/ int VARIANT_IETF_DRAFT = 2; /** UUID variant bits described in the IETF Draft MSB order, * this is the IETF Draft "Microsoft Corporation" field variant 1 1 0 x with unknown bits as 0*/ int VARIANT_MS = (byte) 6; /** UUID variant bits described in the IETF Draft MSB order, * this is the "Future Reserved variant 1 1 1 x with unknown bits as 0*/ int VARIANT_FUTURE = 7; //** UUID Version Constants /** Version one constant for UUID version one of four */ int VERSION_ONE = 1; /** Version two constant for UUID version two of four */ int VERSION_TWO = 2; /** Version three constant for UUID version three of four */ int VERSION_THREE = 3; /** Version four constant for UUID version four of four */ int VERSION_FOUR = 4; //** Exception message constants /** Message indicating this is not a version one UUID */ String WRONG_VAR_VER_MSG = "Not a ietf variant 2 or version 1 (time-based UUID)"; // ** Array positions and lengths of UUID fields ** // /** Byte length of time low field */ int TIME_LOW_BYTE_LEN = 4; /** Byte length of time low field */ int TIME_MID_BYTE_LEN = 2; /** Byte length of time low field */ int TIME_HI_BYTE_LEN = 2; /** Timestamp byte[] position of time low field */ int TIME_LOW_TS_POS = 4; /** Timestamp byte[] position mid field */ int TIME_MID_TS_POS = 2; /** Timestamp byte[] position hi field */ int TIME_HI_TS_POS = 0; /** uuid array position start of time low field */ int TIME_LOW_START_POS = 0; /** uuid array position start of mid field */ int TIME_MID_START_POS = 4; /** uuid array position start of hi field */ int TIME_HI_START_POS = 6; }
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