792f606a64
Contains the cql3 grammer and supporting classes, which will be converted one by one. From commit bf599fb5b062cbcc652da78b7d699e7a01b949ad.
74 lines
2.8 KiB
Java
74 lines
2.8 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.cassandra.cql3;
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import org.apache.cassandra.db.marshal.AbstractType;
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import org.apache.cassandra.exceptions.InvalidRequestException;
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public class TypeCast implements Term.Raw
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{
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private final CQL3Type.Raw type;
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private final Term.Raw term;
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public TypeCast(CQL3Type.Raw type, Term.Raw term)
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{
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this.type = type;
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this.term = term;
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}
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public Term prepare(String keyspace, ColumnSpecification receiver) throws InvalidRequestException
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{
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if (!term.testAssignment(keyspace, castedSpecOf(keyspace, receiver)).isAssignable())
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throw new InvalidRequestException(String.format("Cannot cast value %s to type %s", term, type));
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if (!testAssignment(keyspace, receiver).isAssignable())
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throw new InvalidRequestException(String.format("Cannot assign value %s to %s of type %s", this, receiver.name, receiver.type.asCQL3Type()));
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return term.prepare(keyspace, receiver);
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}
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private ColumnSpecification castedSpecOf(String keyspace, ColumnSpecification receiver) throws InvalidRequestException
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{
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return new ColumnSpecification(receiver.ksName, receiver.cfName, new ColumnIdentifier(toString(), true), type.prepare(keyspace).getType());
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}
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public AssignmentTestable.TestResult testAssignment(String keyspace, ColumnSpecification receiver)
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{
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try
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{
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AbstractType<?> castedType = type.prepare(keyspace).getType();
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if (receiver.type.equals(castedType))
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return AssignmentTestable.TestResult.EXACT_MATCH;
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else if (receiver.type.isValueCompatibleWith(castedType))
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return AssignmentTestable.TestResult.WEAKLY_ASSIGNABLE;
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else
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return AssignmentTestable.TestResult.NOT_ASSIGNABLE;
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}
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catch (InvalidRequestException e)
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{
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throw new AssertionError();
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}
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}
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@Override
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public String toString()
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{
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return "(" + type + ")" + term;
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}
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}
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