/**
* Copyright (C) 2014 JBoss Inc
*
* 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.dashbuilder.dataset.backend;
import java.nio.ByteBuffer;
import java.util.UUID;
import javax.enterprise.context.ApplicationScoped;
import org.apache.commons.codec.binary.Base64;
import org.dashbuilder.dataset.uuid.UUIDGenerator;
/**
* UUID generator based on the <i>java.util.UUID</i> utility
*/
@ApplicationScoped
public class BackendUUIDGenerator implements UUIDGenerator {
public String newUuid() {
UUID uuid = UUID.randomUUID();
return uuid.toString();
}
public String newUuidBase64() {
String uuidStr = newUuid();
return uuidToBase64(uuidStr);
}
public String uuidToBase64(String str) {
Base64 base64 = new Base64();
UUID uuid = UUID.fromString(str);
ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
bb.putLong(uuid.getMostSignificantBits());
bb.putLong(uuid.getLeastSignificantBits());
return base64.encodeBase64URLSafeString(bb.array());
}
public String uuidFromBase64(String str) {
Base64 base64 = new Base64();
byte[] bytes = base64.decodeBase64(str);
ByteBuffer bb = ByteBuffer.wrap(bytes);
UUID uuid = new UUID(bb.getLong(), bb.getLong());
return uuid.toString();
}
}