/**
 * Copyright 2011-2013 Akiban Technologies, Inc.
 * 
 * Licensed 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.
 */

/* The original from which this derives bore the following: */

/*

   Derby - Class org.apache.derby.impl.sql.compile.UserDefinedTypeCompiler

   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 com.akiban.sql.compiler;

import com.akiban.sql.parser.*;

import com.akiban.sql.StandardException;
import com.akiban.sql.types.DataTypeDescriptor;
import com.akiban.sql.types.TypeId;

public class UserDefinedTypeCompiler extends TypeCompiler
{
    protected UserDefinedTypeCompiler(TypeId typeId) {
        super(typeId);
    }

    /**
     * Right now, casting is not allowed from one user defined type
     * to another.
     *
     * @param otherType 
     * @param forDataTypeFunction
     * @return true if otherType is convertible to this type, else false.
     * 
     *@see TypeCompiler#convertible
     */
    public boolean convertible(TypeId otherType, boolean forDataTypeFunction) {
        if (getTypeId().isAnsiUDT()) {
            if (!otherType.isAnsiUDT() ) { 
                return false; 
            }
            return getTypeId().getSQLTypeName().equals(otherType.getSQLTypeName());
        }
                
        /*
        ** We are a non-ANSI user defined type, we are
        ** going to have to let the client find out
        ** the hard way.
        */
        return true;
    }

    /** @see TypeCompiler#compatible */
    public boolean compatible(TypeId otherType) {
        return convertible(otherType, false);
    }
            
    /**
     * @see TypeCompiler#getCorrespondingPrimitiveTypeName
     */

    public String getCorrespondingPrimitiveTypeName() {
        return getTypeId().getCorrespondingJavaTypeName();
    }

    /**
     * Get the method name for getting out the corresponding primitive
     * Java type.
     *
     * @return String The method call name for getting the
     *                              corresponding primitive Java type.
     */
    public String getPrimitiveMethodName() {
        return "getObject";
    }

    /**
     * @see TypeCompiler#getCastToCharWidth
     */
    public int getCastToCharWidth(DataTypeDescriptor dts) {
        // This is the maximum maximum width for user types
        return -1;
    }

}