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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* 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.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());
}
}
}