org.apache.flink.configuration

Class YamlParserUtils

java.lang.Object

org.apache.flink.configuration.YamlParserUtils

public class YamlParserUtils
extends Object

This class contains utility methods to load standard yaml file and convert object to standard yaml syntax.

Constructor Summary

Constructors

Constructor and Description
YamlParserUtils()

Method Summary

Modifier and Type	Method and Description
static List<String>	convertAndDumpYamlFromFlatMap(Map<String,Object> flattenMap) Converts a flat map into a nested map structure and outputs the result as a list of YAML-formatted strings.
static <T> T	convertToObject(String value, Class<T> type)
static Map<String,Object>	loadYamlFile(File file) Loads the contents of the given YAML file into a map.
static String	toYAMLString(Object value) Converts the given value to a string representation in the YAML syntax.

Methods inherited from class java.lang.Object

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

Constructor Detail

YamlParserUtils

public YamlParserUtils()

Method Detail

loadYamlFile

@Nonnull
public static Map<String,Object> loadYamlFile(File file)
                                                throws Exception

Loads the contents of the given YAML file into a map.

Parameters:

file - the YAML file to load.

Returns:

a non-null map representing the YAML content. If the file is empty or only contains comments, an empty map is returned.

Throws:

FileNotFoundException - if the YAML file is not found.

org.snakeyaml.engine.v2.exceptions.YamlEngineException - if the file cannot be parsed.

IOException - if an I/O error occurs while reading from the file stream.

Exception

toYAMLString

public static String toYAMLString(Object value)

Converts the given value to a string representation in the YAML syntax. This method uses a YAML parser to convert the object to YAML format.

The resulting YAML string may have line breaks at the end of each line. This method removes the line break at the end of the string if it exists.

Note: This method may perform escaping on certain characters in the value to ensure proper YAML syntax.

Parameters:

value - The value to be converted.

Returns:

The string representation of the value in YAML syntax.

convertAndDumpYamlFromFlatMap

public static List<String> convertAndDumpYamlFromFlatMap(Map<String,Object> flattenMap)

Converts a flat map into a nested map structure and outputs the result as a list of YAML-formatted strings. Each item in the list represents a single line of the YAML data. The method is synchronized and thus thread-safe.

Parameters:

flattenMap - A map containing flattened keys (e.g., "parent.child.key") associated with their values.

Returns:

A list of strings that represents the YAML data, where each item corresponds to a line of the data.

convertToObject

public static <T> T convertToObject(String value,
                                    Class<T> type)