Class JsonWritingUtils

java.lang.Object

net.logstash.logback.composite.JsonWritingUtils

public class JsonWritingUtils
extends Object

Utilities for writing JSON

Note: This class is for internal use only and subject to backward incompatible change at any time.

Constructor Summary

Constructors

Constructor	Description
JsonWritingUtils()

Method Summary

Modifier and Type	Method	Description
static boolean	shouldWriteField(String fieldName)	Indicates whether the given field name must be written or not.
static void	writeMapEntries(JsonGenerator generator, Map<?,?> map)	Writes entries of the map as fields.
static void	writeMapStringFields(JsonGenerator generator, String fieldName, Map<String,String> map)	Writes a map as String fields to the generator if and only if the fieldName and values are not null.
static void	writeMapStringFields(JsonGenerator generator, String fieldName, Map<String,String> map, boolean lowerCaseKeys)	Writes a map as String fields to the generator if and only if the fieldName and values are not null.
static void	writeNumberField(JsonGenerator generator, String fieldName, int fieldValue)	Writes the field to the generator if and only if the fieldName is not null.
static void	writeNumberField(JsonGenerator generator, String fieldName, long fieldValue)	Writes the field to the generator if and only if the fieldName is not null.
static void	writeStringArrayField(JsonGenerator generator, String fieldName, String[] fieldValues)	Writes an array of strings to the generator if and only if the fieldName and values are not null.
static void	writeStringField(JsonGenerator generator, String fieldName, String fieldValue)	Writes the field to the generator if and only if the fieldName and fieldValue are not null.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

JsonWritingUtils

public JsonWritingUtils()

Method Details

writeMapEntries

public static void writeMapEntries(JsonGenerator generator,
 Map<?,?> map)

Writes entries of the map as fields.

Parameters:

generator - the JsonGenerator to produce JSON content

map - map whose entries are written as JSON field/values

writeMapStringFields

public static void writeMapStringFields(JsonGenerator generator,
 String fieldName,
 Map<String,String> map)

Writes a map as String fields to the generator if and only if the fieldName and values are not null.

Parameters:

generator - the JsonGenerator to produce JSON content

fieldName - name of the JSON property to write the map content under

map - map whose entries are written as JSON field/values

writeMapStringFields

public static void writeMapStringFields(JsonGenerator generator,
 String fieldName,
 Map<String,String> map,
 boolean lowerCaseKeys)

Writes a map as String fields to the generator if and only if the fieldName and values are not null.

Parameters:

generator - the JsonGenerator to produce JSON content

fieldName - name of the JSON property to write the map content under

map - map whose entries are written as JSON field/values

lowerCaseKeys - when true, the map keys will be written in lower case.

writeStringArrayField

public static void writeStringArrayField(JsonGenerator generator,
 String fieldName,
 String[] fieldValues)

Writes an array of strings to the generator if and only if the fieldName and values are not null.

Parameters:

generator - the JsonGenerator to produce JSON content

fieldName - the field name

fieldValues - the field values

writeStringField

public static void writeStringField(JsonGenerator generator,
 String fieldName,
 String fieldValue)

Writes the field to the generator if and only if the fieldName and fieldValue are not null.

Parameters:

generator - the JsonGenerator to produce JSON content

fieldName - the field name

fieldValue - the field value

writeNumberField

public static void writeNumberField(JsonGenerator generator,
 String fieldName,
 int fieldValue)

Writes the field to the generator if and only if the fieldName is not null.

Parameters:

generator - the JsonGenerator to produce JSON content

fieldName - the field name

fieldValue - the field value

writeNumberField

public static void writeNumberField(JsonGenerator generator,
 String fieldName,
 long fieldValue)

Writes the field to the generator if and only if the fieldName is not null.

Parameters:

generator - the JsonGenerator to produce JSON content

fieldName - the field name

fieldValue - the field value

shouldWriteField

public static boolean shouldWriteField(String fieldName)

Indicates whether the given field name must be written or not. A field should be written if its name is not null and not ignored.

Parameters:

fieldName - the field name

Returns:

true if the field should be written, false otherwise

See Also:

• LogstashCommonFieldNames.IGNORE_FIELD_INDICATOR