/**
 * 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.hadoop.fs.azurebfs.diagnostics;


import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.fs.azurebfs.contracts.diagnostics.ConfigurationValidator;
import org.apache.hadoop.fs.azurebfs.contracts.exceptions.InvalidConfigurationValueException;
import org.apache.hadoop.fs.azurebfs.utils.Base64;

/**
* String Base64 configuration value Validator.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class Base64StringConfigurationBasicValidator extends ConfigurationBasicValidator<String> implements ConfigurationValidator{

  public Base64StringConfigurationBasicValidator(final String configKey, final String defaultVal, final boolean throwIfInvalid){
    super(configKey, defaultVal, throwIfInvalid);
  }

  public String validate(final String configValue) throws InvalidConfigurationValueException {
    String result = super.validate((configValue));
    if (result != null) {
      return result;
    }

    if (!Base64.validateIsBase64String(configValue)) {
      throw new InvalidConfigurationValueException(getConfigKey());
    }
    return configValue;
  }
}
