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.cql3;
  
  import java.nio.ByteBuffer;
  
  import org.apache.cassandra.cql3.constraints.ConstraintViolationException;
  import org.apache.cassandra.exceptions.InvalidRequestException;
  import org.apache.cassandra.schema.TableMetadata;
  import org.apache.cassandra.serializers.MarshalException;
  import org.apache.cassandra.utils.FBUtilities;
  
  /**
   * A collection of static validation functions reused across statements.
   *
   * Note: this hosts functions that were historically in ThriftValidation, but
   * it's not necessary clear that this is the best place to have this (this is
   * certainly not horrible either though).
   */
  public abstract class Validation
  {
  
      /**
       * Validates a (full serialized) partition key.
       *
       * @param metadata the metadata for the table of which to check the key.
       * @param key the serialized partition key to check.
       *
       * @throws InvalidRequestException if the provided {@code key} is invalid.
       */
      public static void validateKey(TableMetadata metadata, ByteBuffer key)
      {
          if (key == null || key.remaining() == 0)
              throw new InvalidRequestException("Key may not be empty");
  
          // check that key can be handled by ByteArrayUtil.writeWithShortLength and ByteBufferUtil.writeWithShortLength
          if (key.remaining() > FBUtilities.MAX_UNSIGNED_SHORT)
          {
              throw new InvalidRequestException("Key length of " + key.remaining() +
                                                " is longer than maximum of " +
                                                FBUtilities.MAX_UNSIGNED_SHORT);
          }
  
          try
          {
              metadata.partitionKeyType.validate(key);
          }
          catch (MarshalException e)
          {
              throw new InvalidRequestException(e.getMessage());
          }
      }
  
      public static void checkConstraints(TableMetadata metadata, ByteBuffer key)
      {
          try
          {
              metadata.partitionKeyType.checkConstraints(key, metadata.partitionKeyConstraints);
          }
          catch (ConstraintViolationException e)
          {
              throw new InvalidRequestException(e.getMessage(), e);
          }
      }
  }
  