io.micronaut.jackson.env.JsonPropertySourceLoader Maven / Gradle / Ivy
/*
* Copyright 2017-2019 original 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 io.micronaut.jackson.env;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.MapType;
import com.fasterxml.jackson.databind.type.TypeFactory;
import io.micronaut.context.env.AbstractPropertySourceLoader;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
/**
* A {@link io.micronaut.context.env.PropertySourceLoader} that reads application.json files if they exist.
*
* @author Graeme Rocher
* @since 1.0
*/
public class JsonPropertySourceLoader extends AbstractPropertySourceLoader {
/**
* File extension for property source loader.
*/
public static final String FILE_EXTENSION = "json";
@Override
public Set getExtensions() {
return Collections.singleton(FILE_EXTENSION);
}
@Override
protected void processInput(String name, InputStream input, Map finalMap) throws IOException {
ObjectMapper objectMapper = new ObjectMapper(new JsonFactory());
TypeFactory factory = TypeFactory.defaultInstance();
MapType mapType = factory.constructMapType(LinkedHashMap.class, String.class, Object.class);
Map map = objectMapper.readValue(input, mapType);
processMap(finalMap, map, "");
}
}