| /* |
| * 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.db.marshal.AbstractType; |
| import org.apache.cassandra.exceptions.InvalidRequestException; |
| |
| public class TypeCast extends 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.testAssignment(keyspace, castedSpecOf(keyspace, receiver)).isAssignable()) |
| throw new InvalidRequestException(String.format("Cannot cast value %s to type %s", term, type)); |
| |
| if (!testAssignment(keyspace, receiver).isAssignable()) |
| throw new InvalidRequestException(String.format("Cannot assign value %s to %s of type %s", this, receiver.name, 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 AssignmentTestable.TestResult testAssignment(String keyspace, ColumnSpecification receiver) |
| { |
| AbstractType<?> castedType = type.prepare(keyspace).getType(); |
| if (receiver.type.equals(castedType)) |
| return AssignmentTestable.TestResult.EXACT_MATCH; |
| else if (receiver.type.isValueCompatibleWith(castedType)) |
| return AssignmentTestable.TestResult.WEAKLY_ASSIGNABLE; |
| else |
| return AssignmentTestable.TestResult.NOT_ASSIGNABLE; |
| } |
| |
| public AbstractType<?> getExactTypeIfKnown(String keyspace) |
| { |
| return type.prepare(keyspace).getType(); |
| } |
| |
| public String getText() |
| { |
| return "(" + type + ")" + term; |
| } |
| } |