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Improved UUID management

This commit is contained in:
Luca Frosini 2021-10-21 16:29:35 +02:00
parent 42a650167b
commit 11b218fdec
3 changed files with 92 additions and 41 deletions
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41
src/main/java/org/gcube/informationsystem/utils/ReservedUUID.java
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@ -1,41 +0,0 @@
package org.gcube.informationsystem.utils;
import java.util.HashSet;
import java.util.Set;
import java.util.UUID;
public final class ReservedUUID {
public static final Set<String> RESERVED_UUID_STRING;
public static final Set<UUID> RESERVED_UUID;
static {
RESERVED_UUID_STRING = new HashSet<>();
RESERVED_UUID = new HashSet<>();
String[] uuidValidCharacters = {"1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"};
for(String string : uuidValidCharacters) {
String uuidString = "00000000-0000-0000-0000-000000000000";
uuidString.replaceAll("0", string);
RESERVED_UUID_STRING.add(uuidString);
RESERVED_UUID.add(UUID.fromString(uuidString));
}
}
public static boolean isReservedUUID(UUID uuid) {
return RESERVED_UUID.contains(uuid);
}
public static boolean isReservedUUID(String uuid) {
return RESERVED_UUID_STRING.contains(uuid);
}
public static Set<String> allUUIDAsString(){
return new HashSet<>(RESERVED_UUID_STRING);
}
public static Set<UUID> allUUID(){
return new HashSet<>(RESERVED_UUID);
}
}

57
src/main/java/org/gcube/informationsystem/utils/UUIDManager.java Normal file
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package org.gcube.informationsystem.utils;
import java.util.HashSet;
import java.util.Set;
import java.util.TreeSet;
import java.util.UUID;
/**
* @author Luca Frosini (ISTI - CNR)
*/
public final class UUIDManager {
public static final Set<String> RESERVED_UUID_STRING;
public static final Set<UUID> RESERVED_UUID;
private UUIDManager() {
}
static {
RESERVED_UUID_STRING = new HashSet<>();
RESERVED_UUID = new HashSet<>();
String[] uuidValidCharacters = {"0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"};
for(String string : uuidValidCharacters) {
String uuidString = "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX";
uuidString = uuidString.replaceAll("X", string);
RESERVED_UUID_STRING.add(uuidString);
RESERVED_UUID.add(UUID.fromString(uuidString));
}
}
public static boolean isReservedUUID(UUID uuid) {
return RESERVED_UUID.contains(uuid);
}
public static boolean isReservedUUID(String uuid) {
return RESERVED_UUID_STRING.contains(uuid);
}
public static Set<String> getAllReservedUUIDAsStrings(){
return new TreeSet<>(RESERVED_UUID_STRING);
}
public static Set<UUID> getAllReservedUUID(){
return new TreeSet<>(RESERVED_UUID);
}
public static UUID generateValidRandomUUID() {
UUID generated = UUID.randomUUID();
while(RESERVED_UUID.contains(generated)) {
generated = UUID.randomUUID();
}
return generated;
}
}

35
src/test/java/org/gcube/informationsystem/utils/UUIDManagerTest.java Normal file
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package org.gcube.informationsystem.utils;
import java.util.Set;
import java.util.UUID;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class UUIDManagerTest {
private static final Logger logger = LoggerFactory.getLogger(UUIDManagerTest.class);
@Test
public void testReservedUUID() {
Set<UUID> allUUID = UUIDManager.getAllReservedUUID();
logger.debug("Reserved UUIDs are {}", allUUID);
Set<String> allUUIDAsString = UUIDManager.getAllReservedUUIDAsStrings();
Assert.assertTrue(allUUID.size()==allUUIDAsString.size());
Assert.assertTrue(allUUID.size()==16);
Assert.assertTrue(allUUIDAsString.size()==16);
for(UUID uuid : allUUID) {
Assert.assertTrue(UUIDManager.isReservedUUID(uuid));
Assert.assertTrue(UUIDManager.isReservedUUID(uuid.toString()));
}
for(String uuidString : allUUIDAsString) {
Assert.assertTrue(UUIDManager.isReservedUUID(UUID.fromString(uuidString)));
Assert.assertTrue(UUIDManager.isReservedUUID(uuidString));
}
}
}