/*
* 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 org.apache.cassandra.exceptions.InvalidRequestException;
public class TypeCast implements Term.Raw
{
private final CQL3Type.Raw type;
private final Term.Raw term;
public TypeCast(CQL3Type.Raw type, Term.Raw term)
{
this.type = type;
this.term = term;
}
public Term prepare(String keyspace, ColumnSpecification receiver) throws InvalidRequestException
{
if (!term.isAssignableTo(keyspace, castedSpecOf(keyspace, receiver)))
throw new InvalidRequestException(String.format("Cannot cast value %s to type %s", term, type));
if (!isAssignableTo(keyspace, receiver))
throw new InvalidRequestException(String.format("Cannot assign value %s to %s of type %s", this, receiver, receiver.type.asCQL3Type()));
return term.prepare(keyspace, receiver);
}
private ColumnSpecification castedSpecOf(String keyspace, ColumnSpecification receiver) throws InvalidRequestException
{
return new ColumnSpecification(receiver.ksName, receiver.cfName, new ColumnIdentifier(toString(), true), type.prepare(keyspace).getType());
}
public boolean isAssignableTo(String keyspace, ColumnSpecification receiver) throws InvalidRequestException
{
try
{
return receiver.type.isValueCompatibleWith(type.prepare(keyspace).getType());
}
catch (InvalidRequestException e)
{
throw new AssertionError();
}
}
@Override
public String toString()
{
return "(" + type + ")" + term;
}
}