rapture.common.impl.jackson.JacksonUtil Maven / Gradle / Ivy
/**
* The MIT License (MIT)
*
* Copyright (c) 2011-2016 Incapture Technologies LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package rapture.common.impl.jackson;
import rapture.common.exception.ExceptionToString;
import rapture.common.exception.RaptureExceptionFactory;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.StringWriter;
import java.net.HttpURLConnection;
import java.util.LinkedHashMap;
import java.util.Map;
import java.io.InputStream;
import org.apache.log4j.Logger;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectWriter;
import com.google.common.base.Charsets;
/**
* Copied from standard jackson utility classes
*
* and work http://www.mkyong.com/java/how-to-enable-pretty-print-json-output-jackson/
*
* This class wraps any exceptions thrown by Jackson into RaptureException (unchecked) and throws that. If you need checked exceptions, use JacksonUtilChecked
*
* @author alan
*/
@SuppressWarnings("deprecation")
public final class JacksonUtil {
private static final Logger log = Logger.getLogger(JacksonUtil.class);
public static final ObjectMapper DEFAULT_MAPPER = MapperFactory.createDefault();
private static final ObjectWriter PRETTY_PRINTER = DEFAULT_MAPPER.writerWithDefaultPrettyPrinter();
public static Map getHashFromObject(Object obj) {
return getMapFromJson(jsonFromObject(obj));
}
public static Map getMapFromJson(String json) {
try {
JsonFactory factory = new JsonFactory();
TypeReference> typeRef = new TypeReference>() {
};
return DEFAULT_MAPPER.>readValue(factory.createJsonParser(json), typeRef);
} catch (IOException e) {
throw RaptureExceptionFactory.create(HttpURLConnection.HTTP_INTERNAL_ERROR, "Error parsing json content " + json, e);
}
}
public static Map getMapFromJson(InputStream json) {
try {
JsonFactory factory = new JsonFactory();
TypeReference> typeRef = new TypeReference>() {
};
return DEFAULT_MAPPER.>readValue(factory.createJsonParser(json), typeRef);
} catch (IOException e) {
throw RaptureExceptionFactory.create(HttpURLConnection.HTTP_INTERNAL_ERROR, "Error parsing json content " + json, e);
}
}
public static String jsonFromObject(Object object) {
StringWriter writer = new StringWriter();
try {
DEFAULT_MAPPER.writeValue(writer, object);
} catch (IOException e) {
throw new RuntimeException(e);
}
return writer.toString();
}
public static byte[] bytesJsonFromObject(Object object) {
ByteArrayOutputStream os = new ByteArrayOutputStream();
try {
DEFAULT_MAPPER.writeValue(os, object);
} catch (IOException e) {
throw new RuntimeException(e);
}
return os.toByteArray();
}
public static T objectFromJson(JsonNode json, Class klass) {
T object;
if (klass == null) {
throw RaptureExceptionFactory.create("Null class given to objectFromJson");
}
try {
object = DEFAULT_MAPPER.convertValue(json, klass);
} catch (RuntimeException e) {
throw RaptureExceptionFactory.create(HttpURLConnection.HTTP_INTERNAL_ERROR, "Error making " + klass.getName() + " object from json " + json, e);
}
return object;
}
public static T objectFromJson(String json, Class klass) {
T object;
try {
object = DEFAULT_MAPPER.readValue(json, klass);
} catch (IOException | RuntimeException e) {
throw RaptureExceptionFactory.create(HttpURLConnection.HTTP_INTERNAL_ERROR, "Error making " + klass.getName() + " object from json " + json, e);
}
return object;
}
public static T objectFromJson(String json, TypeReference tr) {
T object;
try {
object = DEFAULT_MAPPER.readValue(json, tr);
} catch (IOException | RuntimeException e) {
throw RaptureExceptionFactory.create(HttpURLConnection.HTTP_INTERNAL_ERROR, "Error parsing json content from TR " + json, e);
}
return object;
}
public static String prettyfy(String json) {
JsonNode node = treeFromJson(json);
try {
return PRETTY_PRINTER.writeValueAsString(node);
} catch (Exception e) {
log.error("error printing json: " + ExceptionToString.format(e));
}
return json;
}
public static JsonNode treeFromJson(String json) {
try {
return DEFAULT_MAPPER.readTree(json);
} catch (IOException | RuntimeException e) {
throw RaptureExceptionFactory.create(HttpURLConnection.HTTP_INTERNAL_ERROR, "Error parsing json content " + json, e);
}
}
public static T objectFromJson(byte[] jsonBytes, Class klass) {
return objectFromJson(new String(jsonBytes, Charsets.UTF_8), klass);
}
private JacksonUtil() {
}
}