io.micronaut.jackson.convert.ArrayNodeToIterableConverter 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.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import io.micronaut.core.convert.ConversionContext;
import io.micronaut.core.convert.ConversionService;
import io.micronaut.core.convert.TypeConverter;
import io.micronaut.core.type.Argument;
import javax.inject.Inject;
import javax.inject.Singleton;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Optional;
/**
* @author Graeme Rocher
* @since 1.0
*/
@Singleton
public class ArrayNodeToIterableConverter implements TypeConverter {
private final ConversionService conversionService;
/**
* Create a new converter to convert from json to given type iteratively.
*
* @param objectMapper To convert from Json
* @param conversionService Convert the given json node to the given target type.
* @deprecated Use {@link #ArrayNodeToIterableConverter(ConversionService)} instead
*/
@Deprecated
public ArrayNodeToIterableConverter(ObjectMapper objectMapper, ConversionService conversionService) {
this(conversionService);
}
/**
* Create a new converter to convert from json to given type iteratively.
*
* @param conversionService Convert the given json node to the given target type.
*/
@Inject
public ArrayNodeToIterableConverter(ConversionService conversionService) {
this.conversionService = conversionService;
}
@Override
public Optional convert(ArrayNode node, Class targetType, ConversionContext context) {
Map> typeVariables = context.getTypeVariables();
Class elementType = typeVariables.isEmpty() ? Map.class : typeVariables.values().iterator().next().getType();
List results = new ArrayList();
node.elements().forEachRemaining(jsonNode -> {
Optional converted = conversionService.convert(jsonNode, elementType, context);
if (converted.isPresent()) {
results.add(converted.get());
}
});
return Optional.of(results);
}
}