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.cassandra.index.sasi.utils;
  
  import java.nio.ByteBuffer;
  
  import org.apache.cassandra.db.marshal.*;
  import org.apache.cassandra.serializers.MarshalException;
  
  public class TypeUtil
  {
      public static boolean isValid(ByteBuffer term, AbstractType<?> validator)
      {
          try
          {
              validator.validate(term);
              return true;
          }
          catch (MarshalException e)
          {
              return false;
          }
      }
  
      public static ByteBuffer tryUpcast(ByteBuffer term, AbstractType<?> validator)
      {
          if (term.remaining() == 0)
              return null;
  
          try
          {
              if (validator instanceof Int32Type && term.remaining() == 2)
              {
                  return Int32Type.instance.decompose((int) term.getShort(term.position()));
              }
              else if (validator instanceof LongType)
              {
                  long upcastToken;
  
                  switch (term.remaining())
                  {
                      case 2:
                          upcastToken = (long) term.getShort(term.position());
                          break;
  
                      case 4:
                          upcastToken = (long) Int32Type.instance.compose(term);
                          break;
  
                      default:
                          upcastToken = Long.parseLong(UTF8Type.instance.getString(term));
                  }
  
                  return LongType.instance.decompose(upcastToken);
              }
              else if (validator instanceof DoubleType && term.remaining() == 4)
              {
                  return DoubleType.instance.decompose((double) FloatType.instance.compose(term));
              }
  
              // maybe it was a string after all
              return validator.fromString(UTF8Type.instance.getString(term));
          }
          catch (Exception e)
          {
              return null;
          }
      }
  }
  