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 org.apache.cassandra.cql3.terms.Term;
  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;
      }
  }
  