/*
* Copyright 2013-2016 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.integration.support.json;
import java.io.File;
import java.io.InputStream;
import java.io.Reader;
import java.io.Writer;
import java.lang.reflect.Type;
import java.net.URL;
import java.util.Collection;
import java.util.Map;
import org.springframework.integration.mapping.support.JsonHeaders;
import org.springframework.util.Assert;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
/**
* Jackson 2 JSON-processor (@link https://github.com/FasterXML) {@linkplain JsonObjectMapper} implementation.
* Delegates <code>toJson</code> and <code>fromJson</code>
* to the {@linkplain com.fasterxml.jackson.databind.ObjectMapper}
* <p>
* It customizes Jackson's default properties with the following ones:
* <ul>
* <li>{@link MapperFeature#DEFAULT_VIEW_INCLUSION} is disabled</li>
* <li>{@link DeserializationFeature#FAIL_ON_UNKNOWN_PROPERTIES} is disabled</li>
* </ul>
*
* @author Artem Bilan
* @since 3.0
*/
public class Jackson2JsonObjectMapper extends AbstractJacksonJsonObjectMapper<JsonNode, JsonParser, JavaType> {
private final ObjectMapper objectMapper;
public Jackson2JsonObjectMapper() {
this.objectMapper = new ObjectMapper();
this.objectMapper.configure(MapperFeature.DEFAULT_VIEW_INCLUSION, false);
this.objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
}
public Jackson2JsonObjectMapper(ObjectMapper objectMapper) {
Assert.notNull(objectMapper, "objectMapper must not be null");
this.objectMapper = objectMapper;
}
@Override
public String toJson(Object value) throws Exception {
return this.objectMapper.writeValueAsString(value);
}
@Override
public void toJson(Object value, Writer writer) throws Exception {
this.objectMapper.writeValue(writer, value);
}
@Override
public JsonNode toJsonNode(Object value) throws Exception {
return this.objectMapper.valueToTree(value);
}
@Override
protected <T> T fromJson(Object json, JavaType type) throws Exception {
if (json instanceof String) {
return this.objectMapper.readValue((String) json, type);
}
else if (json instanceof byte[]) {
return this.objectMapper.readValue((byte[]) json, type);
}
else if (json instanceof File) {
return this.objectMapper.readValue((File) json, type);
}
else if (json instanceof URL) {
return this.objectMapper.readValue((URL) json, type);
}
else if (json instanceof InputStream) {
return this.objectMapper.readValue((InputStream) json, type);
}
else if (json instanceof Reader) {
return this.objectMapper.readValue((Reader) json, type);
}
else {
throw new IllegalArgumentException("'json' argument must be an instance of: " + supportedJsonTypes
+ " , but gotten: " + json.getClass());
}
}
@Override
public <T> T fromJson(JsonParser parser, Type valueType) throws Exception {
return this.objectMapper.readValue(parser, constructType(valueType));
}
@Override
@SuppressWarnings({ "unchecked" })
protected JavaType extractJavaType(Map<String, Object> javaTypes) throws Exception {
JavaType classType = this.createJavaType(javaTypes, JsonHeaders.TYPE_ID);
if (!classType.isContainerType() || classType.isArrayType()) {
return classType;
}
JavaType contentClassType = this.createJavaType(javaTypes, JsonHeaders.CONTENT_TYPE_ID);
if (classType.getKeyType() == null) {
return this.objectMapper.getTypeFactory()
.constructCollectionType((Class<? extends Collection<?>>) classType.getRawClass(), contentClassType);
}
JavaType keyClassType = this.createJavaType(javaTypes, JsonHeaders.KEY_TYPE_ID);
return this.objectMapper.getTypeFactory()
.constructMapType((Class<? extends Map<?, ?>>) classType.getRawClass(), keyClassType, contentClassType);
}
@Override
protected JavaType constructType(Type type) {
return this.objectMapper.constructType(type);
}
}