content: /*
   * 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.asterix.om.base;
  
  import java.io.DataInput;
  import java.io.DataOutput;
  import java.io.IOException;
  import java.util.Arrays;
  
  import org.apache.asterix.om.types.BuiltinType;
  import org.apache.asterix.om.types.IAType;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.node.ObjectNode;
  
  public class AUUID implements IAObject {
  
      public static final int UUID_CHARS = 36;
      public static final int UUID_BYTES = 16;
  
      protected final byte[] uuidBytes;
  
      private static final char[] CHARS;
  
      static {
          CHARS = new char[16];
          for (int i = 0; i < 16; i++) {
              CHARS[i] = Character.forDigit(i, 16);
          }
      }
  
      protected AUUID() {
          this(new byte[UUID_BYTES]);
      }
  
      public AUUID(byte[] bytes) {
          this.uuidBytes = bytes;
      }
  
      @Override
      public ObjectNode toJSON() {
          ObjectMapper om = new ObjectMapper();
          ObjectNode json = om.createObjectNode();
          json.put("AUUID", toString());
          return json;
      }
  
      @Override
      public IAType getType() {
          return BuiltinType.AUUID;
      }
  
      @Override
      public boolean deepEqual(IAObject obj) {
          if (!(obj instanceof AUUID)) {
              return false;
          }
          AUUID oUUID = (AUUID) obj;
          return Arrays.equals(oUUID.uuidBytes, this.uuidBytes);
      }
  
      @Override
      public int hash() {
          return Arrays.hashCode(uuidBytes);
      }
  
      @Override
      public String toString() {
          try {
              StringBuilder buf = new StringBuilder(UUID_CHARS + 9);
              buf.append("uuid: { ");
              appendLiteralOnly(buf);
              buf.append(" }");
              return buf.toString();
          } catch (IOException e) {
              throw new IllegalStateException(e);
          }
      }
  
      public void appendLiteralOnly(Appendable buf) throws IOException {
          appendLiteralOnly(uuidBytes, 0, buf);
      }
  
      private static void digits(byte b[], int offset, int count, Appendable result) throws IOException {
          for (int i = 0; i < count; i++) {
              result.append(CHARS[(b[offset + i] >> 4) & 0xf]);
              result.append(CHARS[b[offset + i] & 0xf]);
          }
      }
  
      public static void appendLiteralOnly(byte[] bytes, int offset, Appendable result) throws IOException {
          digits(bytes, offset, 4, result);
          result.append('-');
          digits(bytes, offset + 4, 2, result);
          result.append('-');
          digits(bytes, offset + 6, 2, result);
          result.append('-');
          digits(bytes, offset + 8, 2, result);
          result.append('-');
          digits(bytes, offset + 10, 6, result);
      }
  
      public void writeTo(DataOutput out) throws HyracksDataException {
          try {
              out.write(uuidBytes);
          } catch (IOException e) {
              throw HyracksDataException.create(e);
          }
      }
  
      public static AUUID readFrom(DataInput in) throws HyracksDataException {
          AUUID instance = new AUUID();
          try {
              in.readFully(instance.uuidBytes);
          } catch (IOException e) {
              throw HyracksDataException.create(e);
          }
          return instance;
      }
  
  }
  