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.external.library.msgpack;
  
  import static org.msgpack.core.MessagePack.Code.FIXARRAY_PREFIX;
  import static org.msgpack.core.MessagePack.Code.FIXSTR_PREFIX;
  import static org.msgpack.core.MessagePack.Code.STR32;
  
  import java.nio.ByteBuffer;
  import java.nio.charset.StandardCharsets;
  
  import org.apache.asterix.om.types.ATypeTag;
  import org.apache.asterix.om.types.IAType;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  
  public class MessagePackUtils {
  
      public static ATypeTag peekUnknown(IAType type) {
          switch (type.getTypeTag()) {
              case MISSING:
              case NULL:
                  return type.getTypeTag();
              default:
                  return ATypeTag.TYPE;
          }
      }
  
      public static void packFixPos(ByteBuffer buf, byte in) throws HyracksDataException {
          byte mask = (byte) (1 << 7);
          if ((in & mask) != 0) {
              throw HyracksDataException.create(org.apache.hyracks.api.exceptions.ErrorCode.ILLEGAL_STATE,
                      "fixint7 must be positive");
          }
          buf.put(in);
      }
  
      public static void packFixStr(ByteBuffer buf, String in) throws HyracksDataException {
          byte[] strBytes = in.getBytes(StandardCharsets.UTF_8);
          if (strBytes.length > 31) {
              throw HyracksDataException.create(org.apache.hyracks.api.exceptions.ErrorCode.ILLEGAL_STATE,
                      "fixint7 must be positive");
          }
          buf.put((byte) (FIXSTR_PREFIX + strBytes.length));
          buf.put(strBytes);
      }
  
      public static void packStr(ByteBuffer out, String in) {
          out.put(STR32);
          byte[] strBytes = in.getBytes(StandardCharsets.UTF_8);
          out.putInt(strBytes.length);
          out.put(strBytes);
      }
  
      public static void packFixArrayHeader(ByteBuffer buf, byte numObj) {
          buf.put((byte) (FIXARRAY_PREFIX + (0x0F & numObj)));
      }
  }
  