src/java/org/apache/cassandra/cql3/AbstractMarker.java

/*
 * 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.CollectionType;
import org.apache.cassandra.exceptions.InvalidRequestException;


/**
 * A single bind marker.
 */
public abstract class AbstractMarker extends Term.NonTerminal
{
    protected final int bindIndex;
    protected final ColumnSpecification receiver;

    protected AbstractMarker(int bindIndex, ColumnSpecification receiver)
    {
        this.bindIndex = bindIndex;
        this.receiver = receiver;
    }

    public void collectMarkerSpecification(ColumnSpecification[] boundNames)
    {
        boundNames[bindIndex] = receiver;
    }

    public boolean containsBindMarker()
    {
        return true;
    }

    /**
     * A parsed, but non prepared, bind marker.
     */
    public static class Raw implements Term.Raw
    {
        protected final int bindIndex;

        public Raw(int bindIndex)
        {
            this.bindIndex = bindIndex;
        }

        public AbstractMarker prepare(ColumnSpecification receiver) throws InvalidRequestException
        {
            if (!(receiver.type instanceof CollectionType))
                return new Constants.Marker(bindIndex, receiver);

            switch (((CollectionType)receiver.type).kind)
            {
                case LIST: return new Lists.Marker(bindIndex, receiver);
                case SET:  return new Sets.Marker(bindIndex, receiver);
                case MAP:  return new Maps.Marker(bindIndex, receiver);
            }
            throw new AssertionError();
        }

        public boolean isAssignableTo(ColumnSpecification receiver)
        {
            return true;
        }

        @Override
        public String toString()
        {
            return "?";
        }
    }
}