/*
 * 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.polaris.persistence.nosql.impl.indexes;

import static org.apache.polaris.persistence.nosql.api.obj.ObjRef.objRef;

import java.nio.ByteBuffer;
import java.util.concurrent.ThreadLocalRandom;
import org.apache.polaris.persistence.nosql.api.obj.ObjRef;
import org.apache.polaris.persistence.nosql.api.obj.SimpleTestObj;

public final class Util {
  private Util() {}

  private static final char[] HEX = {
    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
  };

  public static String asHex(ByteBuffer b) {
    StringBuilder sb = new StringBuilder();
    for (int p = b.position(); p < b.limit(); p++) {
      int v = b.get(p);
      sb.append(HEX[(v >> 4) & 0xf]);
      sb.append(HEX[v & 0xf]);
    }
    return sb.toString();
  }

  public static ObjRef randomObjId() {
    return objRef(SimpleTestObj.TYPE, ThreadLocalRandom.current().nextLong(), 1);
  }
}
