/*
* 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.
*/
package com.facebook.presto.type;
import com.facebook.presto.spi.type.ParametricType;
import com.facebook.presto.spi.type.StandardTypes;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.spi.type.TypeManager;
import com.facebook.presto.spi.type.TypeParameter;
import java.util.List;
import static com.facebook.presto.spi.type.CharType.createCharType;
public class CharParametricType
implements ParametricType
{
public static final CharParametricType CHAR = new CharParametricType();
@Override
public String getName()
{
return StandardTypes.CHAR;
}
@Override
public Type createType(TypeManager typeManager, List<TypeParameter> parameters)
{
if (parameters.isEmpty()) {
return createCharType(1);
}
if (parameters.size() != 1) {
throw new IllegalArgumentException("Expected at most one parameter for CHAR");
}
TypeParameter parameter = parameters.get(0);
if (!parameter.isLongLiteral()) {
throw new IllegalArgumentException("CHAR length must be a number");
}
return createCharType(parameter.getLongLiteral());
}
}