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package org.apache.maven.configuration;
/*
* 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.
*/
/**
* Preprocesses a value from a bean configuration before the bean configurator unmarshals it into a bean property. A
* common use case for such preprocessing is the evaluation of variables within the configuration value.
*
* @author Benjamin Bentmann
*/
public interface BeanConfigurationValuePreprocessor
{
/**
* Preprocesses the specified bean configuration value. The optional type provided to this method is a hint (not a
* requirement) for the preprocessor to resolve the value to a compatible value or a (string) value than can be
* unmarshalled into that type. The preprocessor is not required to perform any type conversion but should rather
* filter out incompatible values from its result.
*
* @param value The configuration value to preprocess, must not be {@code null}.
* @param type The target type of the value, may be {@code null}.
* @return The processed configuration value or {@code null} if none.
* @throws BeanConfigurationException If an error occurred while preprocessing the value.
*/
Object preprocessValue( String value, Class<?> type )
throws BeanConfigurationException;
}
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