/*
 * 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.raptor.util;

import static com.google.common.base.Preconditions.checkArgument;
import static java.lang.String.format;
import static java.util.Locale.ENGLISH;

public final class MetadataUtil
{
    private MetadataUtil() {}

    public static String checkSchemaName(String schemaName)
    {
        return checkLowerCase(schemaName, "schemaName");
    }

    public static String checkTableName(String tableName)
    {
        return checkLowerCase(tableName, "tableName");
    }

    private static String checkLowerCase(String value, String name)
    {
        if (value == null) {
            throw new NullPointerException(format("%s is null", name));
        }
        checkArgument(value.equals(value.toLowerCase(ENGLISH)), "%s is not lowercase", name);
        return value;
    }
}
