/*
* Copyright 2012-2017 the original author or authors.
*
* 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 org.springframework.boot.configurationprocessor.fieldvalues;
import java.util.Collections;
import java.util.Map;
import javax.lang.model.element.TypeElement;
import org.springframework.boot.configurationprocessor.fieldvalues.javac.JavaCompilerFieldValuesParser;
/**
* Parser which can be used to obtain the field values from an {@link TypeElement}.
*
* @author Phillip Webb
* @since 1.1.2
* @see JavaCompilerFieldValuesParser
*/
@FunctionalInterface
public interface FieldValuesParser {
/**
* Implementation of {@link FieldValuesParser} that always returns an empty result.
*/
FieldValuesParser NONE = new FieldValuesParser() {
@Override
public Map<String, Object> getFieldValues(TypeElement element) {
return Collections.emptyMap();
}
};
/**
* Return the field values for the given element.
* @param element the element to inspect
* @return a map of field names to values.
* @throws Exception if the values cannot be extracted
*/
Map<String, Object> getFieldValues(TypeElement element) throws Exception;
}