/*
* 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.deltaspike.core.spi.config;
/**
* <p>A filter which can be added to the
* {@link org.apache.deltaspike.core.api.config.ConfigResolver}.
* The filter can be used to decrypt config values or prepare
* values for logging.</p>
*
* <p>Registering a {@code ConfigFilter} can either be done via the
* {@code java.util.ServiceLoader} pattern or by manually adding it via
* {@link org.apache.deltaspike.core.api.config.ConfigResolver#addConfigFilter(ConfigFilter)}.</p>
*/
public interface ConfigFilter
{
/**
* Filter the given configuration value
* @param key
* @param value
* @return the filtered value or the original input String if no filter shall be applied
*/
String filterValue(String key, String value);
/**
* Filter the given configuration value for usage in logs.
* This might be used to mask out passwords, etc.
* @param key
* @param value
* @return the filtered value or the original input String if no filter shall be applied
*/
String filterValueForLog(String key, String value);
}