mirror of https://github.com/apache/cloudstack.git
75 lines
2.7 KiB
Java
75 lines
2.7 KiB
Java
//
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// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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//
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package com.cloud.utils;
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import com.cloud.utils.exception.CloudRuntimeException;
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import org.apache.xerces.impl.xpath.regex.RegularExpression;
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import java.util.UUID;
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public class UuidUtils {
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private static final RegularExpression uuidRegex = new RegularExpression("[0-9a-fA-F]{8}(?:-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}");
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public static String first(String uuid) {
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return uuid.substring(0, uuid.indexOf('-'));
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}
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/**
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* Checks if the parameter is a valid UUID (based on {@link UuidUtils#uuidRegex}).
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* <br/>
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* Example: 24abcb8f-4211-374f-a2e1-e5c0b7e88a2d -> true
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* 24abcb8f4211374fa2e1e5c0b7e88a2dda23 -> false
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*/
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public static boolean isUuid(String uuid) {
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return uuidRegex.matches(uuid);
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}
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/**
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* Returns a valid UUID in string format from a 32 digit UUID string without hyphens.
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* Example: 24abcb8f4211374fa2e1e5c0b7e88a2d -> 24abcb8f-4211-374f-a2e1-e5c0b7e88a2d
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*/
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public static String normalize(String noHyphen) {
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if (noHyphen.length() != 32 || noHyphen.contains("-")) {
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throw new CloudRuntimeException("Invalid string format");
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}
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StringBuilder stringBuilder = new StringBuilder();
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stringBuilder.append(noHyphen.substring(0, 8)).append("-")
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.append(noHyphen.substring(8, 12)).append("-")
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.append(noHyphen.substring(12, 16)).append("-")
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.append(noHyphen.substring(16, 20)).append("-")
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.append(noHyphen.substring(20, 32));
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String uuid = stringBuilder.toString();
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if (!isUuid(uuid)) {
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throw new CloudRuntimeException("Error generating UUID");
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}
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return uuid;
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}
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public static RegularExpression getUuidRegex() {
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return uuidRegex;
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}
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public static UUID nameUUIDFromBytes(byte[] name) {
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return UUID.nameUUIDFromBytes(name);
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}
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}
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