io.micronaut.jackson.convert.ArrayNodeToArrayConverter 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.convert;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import io.micronaut.core.convert.ConversionContext;
import io.micronaut.core.convert.TypeConverter;
import javax.inject.Inject;
import javax.inject.Provider;
import javax.inject.Singleton;
import java.util.Optional;
/**
* Converts {@link ArrayNode} instances to arrays.
*
* @author Graeme Rocher
* @since 1.0
*/
@Singleton
public class ArrayNodeToArrayConverter implements TypeConverter {
private final Provider objectMapper;
/**
* Create a converter to convert form ArrayNode to Array.
*
* @param objectMapper To convert from Json to Array
* @deprecated Use {@link #ArrayNodeToArrayConverter(Provider)} instead
*/
@Deprecated
public ArrayNodeToArrayConverter(ObjectMapper objectMapper) {
this(() -> objectMapper);
}
/**
* Create a converter to convert form ArrayNode to Array.
*
* @param objectMapper To convert from Json to Array
*/
@Inject
public ArrayNodeToArrayConverter(Provider objectMapper) {
this.objectMapper = objectMapper;
}
@Override
public Optional convert(ArrayNode node, Class targetType, ConversionContext context) {
try {
Object[] result = objectMapper.get().treeToValue(node, targetType);
return Optional.of(result);
} catch (JsonProcessingException e) {
context.reject(e);
return Optional.empty();
}
}
}