/*
* 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.db.marshal;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import com.google.common.base.Objects;
import org.apache.cassandra.cql3.CQL3Type;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.exceptions.SyntaxException;
import org.apache.cassandra.serializers.*;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.cassandra.utils.Pair;
/**
* A user defined type.
*
* A user type is really just a tuple type on steroids.
*/
public class UserType extends TupleType
{
public final String keyspace;
public final ByteBuffer name;
private final List<ByteBuffer> fieldNames;
public UserType(String keyspace, ByteBuffer name, List<ByteBuffer> fieldNames, List<AbstractType<?>> fieldTypes)
{
super(fieldTypes);
assert fieldNames.size() == fieldTypes.size();
this.keyspace = keyspace;
this.name = name;
this.fieldNames = fieldNames;
}
public static UserType getInstance(TypeParser parser) throws ConfigurationException, SyntaxException
{
Pair<Pair<String, ByteBuffer>, List<Pair<ByteBuffer, AbstractType>>> params = parser.getUserTypeParameters();
String keyspace = params.left.left;
ByteBuffer name = params.left.right;
List<ByteBuffer> columnNames = new ArrayList<>(params.right.size());
List<AbstractType<?>> columnTypes = new ArrayList<>(params.right.size());
for (Pair<ByteBuffer, AbstractType> p : params.right)
{
columnNames.add(p.left);
columnTypes.add(p.right.freeze());
}
return new UserType(keyspace, name, columnNames, columnTypes);
}
public AbstractType<?> fieldType(int i)
{
return type(i);
}
public List<AbstractType<?>> fieldTypes()
{
return types;
}
public ByteBuffer fieldName(int i)
{
return fieldNames.get(i);
}
public List<ByteBuffer> fieldNames()
{
return fieldNames;
}
public String getNameAsString()
{
return UTF8Type.instance.compose(name);
}
// Note: the only reason we override this is to provide nicer error message, but since that's not that much code...
@Override
public void validate(ByteBuffer bytes) throws MarshalException
{
ByteBuffer input = bytes.duplicate();
for (int i = 0; i < size(); i++)
{
// we allow the input to have less fields than declared so as to support field addition.
if (!input.hasRemaining())
return;
if (input.remaining() < 4)
throw new MarshalException(String.format("Not enough bytes to read size of %dth field %s", i, fieldName(i)));
int size = input.getInt();
// size < 0 means null value
if (size < 0)
continue;
if (input.remaining() < size)
throw new MarshalException(String.format("Not enough bytes to read %dth field %s", i, fieldName(i)));
ByteBuffer field = ByteBufferUtil.readBytes(input, size);
types.get(i).validate(field);
}
// We're allowed to get less fields than declared, but not more
if (input.hasRemaining())
throw new MarshalException("Invalid remaining data after end of UDT value");
}
@Override
public int hashCode()
{
return Objects.hashCode(keyspace, name, fieldNames, types);
}
@Override
public boolean equals(Object o)
{
if(!(o instanceof UserType))
return false;
UserType that = (UserType)o;
return keyspace.equals(that.keyspace) && name.equals(that.name) && fieldNames.equals(that.fieldNames) && types.equals(that.types);
}
@Override
public CQL3Type asCQL3Type()
{
return CQL3Type.UserDefined.create(this);
}
@Override
public String toString()
{
return getClass().getName() + TypeParser.stringifyUserTypeParameters(keyspace, name, fieldNames, types);
}
}