/*-
* -\-\-
* Helios Client
* --
* Copyright (C) 2016 Spotify AB
* --
* 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.spotify.helios.common;
import static com.fasterxml.jackson.databind.DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES;
import static com.fasterxml.jackson.databind.MapperFeature.SORT_PROPERTIES_ALPHABETICALLY;
import static com.fasterxml.jackson.databind.SerializationFeature.ORDER_MAP_ENTRIES_BY_KEYS;
import static com.fasterxml.jackson.databind.SerializationFeature.WRITE_DATES_AS_TIMESTAMPS;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.MappingIterator;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectReader;
import com.fasterxml.jackson.databind.ObjectWriter;
import com.fasterxml.jackson.databind.type.TypeFactory;
import com.google.common.base.Throwables;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Type;
import java.util.Map;
public class Json {
private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper()
.configure(SORT_PROPERTIES_ALPHABETICALLY, true)
.configure(ORDER_MAP_ENTRIES_BY_KEYS, true)
.configure(WRITE_DATES_AS_TIMESTAMPS, false)
.configure(FAIL_ON_UNKNOWN_PROPERTIES, false);
private static final ObjectWriter NORMALIZING_OBJECT_WRITER = new ObjectMapper()
.setSerializationInclusion(JsonInclude.Include.NON_EMPTY)
.configure(SORT_PROPERTIES_ALPHABETICALLY, true)
.configure(ORDER_MAP_ENTRIES_BY_KEYS, true)
.configure(WRITE_DATES_AS_TIMESTAMPS, false)
.writer();
private static final ObjectWriter PRETTY_OBJECT_WRITER = new ObjectMapper()
.configure(SORT_PROPERTIES_ALPHABETICALLY, true)
.configure(ORDER_MAP_ENTRIES_BY_KEYS, true)
.configure(WRITE_DATES_AS_TIMESTAMPS, false)
.writerWithDefaultPrettyPrinter();
private static final TypeReference<Map<String, Object>> MAP_TYPE =
new TypeReference<Map<String, Object>>() {};
/**
* Serialize an object to json. Use when it is not know whether an object can be json
* serializable.
*
* @param value The object to serialize.
* @return The byte array for the given object.
* @throws JsonProcessingException If the json cannot be generated.
* @see #asBytesUnchecked(Object)
*/
public static byte[] asBytes(final Object value) throws JsonProcessingException {
return OBJECT_MAPPER.writeValueAsBytes(value);
}
/**
* Serialize an object to json. Use when object is expected to be json serializable.
*
* @param value The object to serialize.
* @return The byte array for the given object.
* @see #asBytes(Object)
*/
public static byte[] asBytesUnchecked(final Object value) {
try {
return OBJECT_MAPPER.writeValueAsBytes(value);
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
}
/**
* Serialize an object to a json string. Use when it is not know whether an object can be json
* serializable.
*
* @param value The object to serialize.
* @return The serialized object.
* @throws JsonProcessingException If the json cannot be generated.
* @see #asStringUnchecked(Object)
*/
public static String asString(final Object value) throws JsonProcessingException {
return OBJECT_MAPPER.writeValueAsString(value);
}
/**
* Serialize an object to a json string. Use when object is expected to be json serializable.
*
* @param value The object to serialize.
* @return The serialized object.
* @see #asString(Object)
*/
public static String asStringUnchecked(final Object value) {
try {
return asString(value);
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
}
/**
* Serialize an object to a json string. Use when it is not know whether an object can be json
* serializable.
*
* @param value The object to serialize.
* @return The serialized object.
* @throws JsonProcessingException If the json cannot be generated.
* @see #asPrettyStringUnchecked(Object)
*/
public static String asPrettyString(final Object value) throws JsonProcessingException {
return PRETTY_OBJECT_WRITER.writeValueAsString(value);
}
/**
* Serialize an object to a json string. Use when object is expected to be json serializable.
*
* @param value The object to serialize.
* @return The serialized object.
* @see #asPrettyString(Object)
*/
public static String asPrettyStringUnchecked(final Object value) {
try {
return asPrettyString(value);
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
}
/**
* Serialize an object to a json string, ordering fields and omitting null and empty fields.
* Use when it is not know whether an object can be json serializable.
*
* @param value The object to serialize.
* @return The serialized object.
* @throws JsonProcessingException If the json cannot be generated.
* @see #asPrettyStringUnchecked(Object)
*/
public static String asNormalizedString(final Object value) throws JsonProcessingException {
return NORMALIZING_OBJECT_WRITER.writeValueAsString(value);
}
/**
* Serialize an object to a json string, ordering fields and omitting null and empty fields.
* Use when object is expected to be json serializable.
*
* @param value The object to serialize.
* @return The serialized object.
* @see #asPrettyString(Object)
*/
public static String asNormalizedStringUnchecked(final Object value) {
try {
return asNormalizedString(value);
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
}
public static <T> T read(final String content, final Class<T> clazz) throws IOException {
return OBJECT_MAPPER.readValue(content, clazz);
}
public static <T> T read(final String content, final TypeReference<?> typeReference)
throws IOException {
return OBJECT_MAPPER.readValue(content, typeReference);
}
public static <T> T read(final String content, final JavaType javaType)
throws IOException {
return OBJECT_MAPPER.readValue(content, javaType);
}
public static <T> T read(final byte[] bytes, final Class<T> clazz) throws IOException {
return OBJECT_MAPPER.readValue(bytes, clazz);
}
public static <T> T read(final byte[] bytes, final TypeReference<?> typeReference)
throws IOException {
return OBJECT_MAPPER.readValue(bytes, typeReference);
}
public static <T> T read(final byte[] bytes, final JavaType javaType)
throws IOException {
return OBJECT_MAPPER.readValue(bytes, javaType);
}
public static <T> T readUnchecked(final String content, final Class<T> clazz) {
try {
return OBJECT_MAPPER.readValue(content, clazz);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static <T> T readUnchecked(final String content, final TypeReference<?> typeReference) {
try {
return OBJECT_MAPPER.readValue(content, typeReference);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static <T> T readUnchecked(final String content, final JavaType javaType) {
try {
return OBJECT_MAPPER.readValue(content, javaType);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static <T> T readUnchecked(final byte[] bytes, final Class<T> clazz) {
try {
return OBJECT_MAPPER.readValue(bytes, clazz);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static <T> T readUnchecked(final byte[] bytes, final TypeReference<?> typeReference) {
try {
return OBJECT_MAPPER.readValue(bytes, typeReference);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static <T> T readUnchecked(final byte[] bytes, final JavaType javaType) {
try {
return OBJECT_MAPPER.readValue(bytes, javaType);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static MappingIterator<Map<String, Object>> readValues(
final InputStream stream, final TypeReference<Map<String, Object>> typeReference)
throws IOException {
final JsonParser parser = OBJECT_MAPPER.getFactory().createParser(stream);
return OBJECT_MAPPER.readValues(parser, typeReference);
}
public static MappingIterator<JsonNode> readValues(
final InputStream stream)
throws IOException {
final JsonParser parser = OBJECT_MAPPER.getFactory().createParser(stream);
return OBJECT_MAPPER.readValues(parser, JsonNode.class);
}
public static JsonNode readTree(final byte[] bytes) throws IOException {
return OBJECT_MAPPER.readTree(bytes);
}
public static JsonNode readTree(final String content) throws IOException {
return OBJECT_MAPPER.readTree(content);
}
public static JsonNode readTree(final File file) throws IOException {
return OBJECT_MAPPER.readTree(file);
}
public static JsonNode readTreeUnchecked(final byte[] bytes) {
try {
return readTree(bytes);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static JsonNode readTreeUnchecked(final String content) {
try {
return readTree(content);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static JsonNode readTreeUnchecked(final File file) {
try {
return readTree(file);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static JavaType type(Type type) {
return OBJECT_MAPPER.constructType(type);
}
public static JavaType type(final TypeReference<?> typeReference) {
return OBJECT_MAPPER.getTypeFactory().constructType(typeReference);
}
public static TypeFactory typeFactory() {
return OBJECT_MAPPER.getTypeFactory();
}
public static ObjectReader reader() {
return OBJECT_MAPPER.reader();
}
public static ObjectWriter writer() {
return OBJECT_MAPPER.writer();
}
public static byte[] sha1digest(final Object obj) throws IOException {
final String json = NORMALIZING_OBJECT_WRITER.writeValueAsString(obj);
final Map<String, Object> map = OBJECT_MAPPER.readValue(json, MAP_TYPE);
return sha1digest(map);
}
public static byte[] sha1digest(final Map<String, ?> obj) throws IOException {
final byte[] bytes = NORMALIZING_OBJECT_WRITER.writeValueAsBytes(obj);
return Hash.sha1digest(bytes);
}
}