com.tectonica.thirdparty.Jackson2 Maven / Gradle / Ivy
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/*
* Copyright (C) 2014 Zach Melamed
*
* Latest version available online at https://github.com/zach-m/tectonica-commons
*
* 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 com.tectonica.thirdparty;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.core.io.JsonStringEncoder;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
/**
* Convenience wrapper for Jackson APIs version 2.x. Requires:
*
*
* <dependency>
* <groupId>com.fasterxml.jackson.core</groupId>
* <artifactId>jackson-databind</artifactId>
* </dependency>
*
*
* @author Zach Melamed
*/
public class Jackson2
{
private static final ObjectMapper treeMapper = new ObjectMapper();
public static JsonNode parse(String jsonObject)
{
try
{
return treeMapper.readValue(jsonObject, JsonNode.class);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
public static ArrayNode parseArray(String jsonArray)
{
try
{
return treeMapper.readValue(jsonArray, ArrayNode.class);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
// ///////////////////////////////////////////////////////////////////
public static String escape(String text)
{
return new String(JsonStringEncoder.getInstance().quoteAsUTF8(text));
}
// ///////////////////////////////////////////////////////////////////
private static final ObjectMapper fieldsMapper = createFieldsMapper();
private static final ObjectMapper propsMapper = createPropsMapper();
public static ObjectMapper createFieldsMapper()
{
ObjectMapper mapper = new ObjectMapper();
// limit to fields only
mapper.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);
mapper.setVisibility(PropertyAccessor.GETTER, Visibility.NONE);
mapper.setVisibility(PropertyAccessor.SETTER, Visibility.NONE);
// general configuration
mapper.setSerializationInclusion(Include.NON_NULL);
mapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
return mapper;
}
public static ObjectMapper createPropsMapper()
{
ObjectMapper mapper = new ObjectMapper();
// limit to props only
mapper.setVisibility(PropertyAccessor.FIELD, Visibility.NONE);
mapper.setVisibility(PropertyAccessor.GETTER, Visibility.ANY);
mapper.setVisibility(PropertyAccessor.SETTER, Visibility.ANY);
// general configuration
mapper.setSerializationInclusion(Include.NON_NULL);
mapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
return mapper;
}
// ///////////////////////////////////////////////////////////////////
public static String toJson(Object o, ObjectMapper mapper)
{
try
{
return mapper.writeValueAsString(o);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
public static void toJson(OutputStream os, Object o, ObjectMapper mapper)
{
try
{
mapper.writeValue(os, o);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
public static void toJson(Writer w, Object o, ObjectMapper mapper)
{
try
{
mapper.writeValue(w, o);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
public static T fromJson(String jsonStr, Class clz, ObjectMapper mapper)
{
try
{
return mapper.readValue(jsonStr, clz);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
public static T fromJson(InputStream is, Class clz, ObjectMapper mapper)
{
try
{
return mapper.readValue(is, clz);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
public static T fromJson(Reader r, Class clz, ObjectMapper mapper)
{
try
{
return mapper.readValue(r, clz);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
public static T fromJson(String jsonStr, Class clz, Class paramClz, ObjectMapper mapper)
{
try
{
JavaType jt = mapper.getTypeFactory().constructParametrizedType(clz, clz, paramClz);
return mapper.readValue(jsonStr, jt);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
public static T fromJson(InputStream is, Class clz, Class paramClz, ObjectMapper mapper)
{
try
{
JavaType jt = mapper.getTypeFactory().constructParametrizedType(clz, clz, paramClz);
return mapper.readValue(is, jt);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
public static T fromJson(Reader r, Class clz, Class paramClz, ObjectMapper mapper)
{
try
{
JavaType jt = mapper.getTypeFactory().constructParametrizedType(clz, clz, paramClz);
return mapper.readValue(r, jt);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
// ///////////////////////////////////////////////////////////////////
public static String propsToJson(Object o)
{
return toJson(o, propsMapper);
}
public static void propsToJson(OutputStream os, Object o)
{
toJson(os, o, propsMapper);
}
public static void propsToJson(Writer w, Object o)
{
toJson(w, o, propsMapper);
}
public static T propsFromJson(String jsonStr, Class clz)
{
return fromJson(jsonStr, clz, propsMapper);
}
public static T propsFromJson(InputStream is, Class clz)
{
return fromJson(is, clz, propsMapper);
}
public static T propsFromJson(Reader r, Class clz)
{
return fromJson(r, clz, propsMapper);
}
public static T propsFromJson(String jsonStr, Class clz, Class paramClz)
{
return fromJson(jsonStr, clz, paramClz, propsMapper);
}
public static T propsFromJson(InputStream is, Class clz, Class paramClz)
{
return fromJson(is, clz, paramClz, propsMapper);
}
public static T propsFromJson(Reader r, Class clz, Class paramClz)
{
return fromJson(r, clz, paramClz, propsMapper);
}
public static String fieldsToJson(Object o)
{
return toJson(o, fieldsMapper);
}
public static void fieldsToJson(OutputStream os, Object o)
{
toJson(os, o, fieldsMapper);
}
public static void fieldsToJson(Writer w, Object o)
{
toJson(w, o, fieldsMapper);
}
public static T fieldsFromJson(String jsonStr, Class clz)
{
return fromJson(jsonStr, clz, fieldsMapper);
}
public static T fieldsFromJson(InputStream is, Class clz)
{
return fromJson(is, clz, fieldsMapper);
}
public static T fieldsFromJson(Reader r, Class clz)
{
return fromJson(r, clz, fieldsMapper);
}
public static T fieldsFromJson(String jsonStr, Class clz, Class paramClz)
{
return fromJson(jsonStr, clz, paramClz, fieldsMapper);
}
public static T fieldsFromJson(InputStream is, Class clz, Class paramClz)
{
return fromJson(is, clz, paramClz, fieldsMapper);
}
public static T fieldsFromJson(Reader r, Class clz, Class paramClz)
{
return fromJson(r, clz, paramClz, fieldsMapper);
}
}