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.serializers;
  
  import java.util.List;
  
  import org.apache.cassandra.db.TypeSizes;
  import org.apache.cassandra.db.marshal.ValueAccessor;
  
  public class TupleSerializer extends BytesSerializer
  {
      public final List<TypeSerializer<?>> fields;
  
      public TupleSerializer(List<TypeSerializer<?>> fields)
      {
          this.fields = fields;
      }
  
      public <V> void validate(V input, ValueAccessor<V> accessor) throws MarshalException
      {
          int offset = 0;
          for (int i = 0; i < fields.size(); i++)
          {
              // we allow the input to have less fields than declared so as to support field addition.
              if (accessor.isEmptyFromOffset(input, offset))
                  return;
  
              if (accessor.sizeFromOffset(input, offset) < Integer.BYTES)
                  throw new MarshalException(String.format("Not enough bytes to read size of %dth component", i));
  
              int size = accessor.getInt(input, offset);
              offset += TypeSizes.INT_SIZE;
  
              // size < 0 means null value
              if (size < 0)
                  continue;
  
              if (accessor.sizeFromOffset(input, offset) < size)
                  throw new MarshalException(String.format("Not enough bytes to read %dth component", i));
  
              V field = accessor.slice(input, offset, size);
              offset += size;
              fields.get(i).validate(field, accessor);
          }
  
          // We're allowed to get less fields than declared, but not more
          if (!accessor.isEmptyFromOffset(input, offset))
              throw new MarshalException("Invalid remaining data after end of tuple value");
      }
  }
  