Package com.github.jsonldjava.utils

Class Obj

java.lang.Object

com.github.jsonldjava.utils.Obj

public class Obj
extends Object

Constructor Summary

Constructors

Constructor	Description
Obj()

Method Summary

Modifier and Type	Method	Description
static boolean	contains(Object map, String... keys)
static boolean	equals(Object v1, Object v2)	A null-safe equals check using v1.equals(v2) if they are both not null.
static Object	get(Map<String,Object> map, String... keys)	Used to make getting values from maps embedded in maps embedded in maps easier TODO: roll out the loops for efficiency
static Map<String,Object>	newMap()	Helper function for creating maps and tuning them as necessary.
static Map<String,Object>	newMap(String key, Object value)	Helper function for creating maps and tuning them as necessary.
static Object	put(Object map, String key1, Object value)
static Object	put(Object map, String key1, String key2, Object value)
static Object	put(Object map, String key1, String key2, String key3, Object value)
static Object	put(Object map, String key1, String key2, String key3, String key4, Object value)
static Object	remove(Object map, String k1, String k2)

Methods inherited from class java.lang.Object

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

Constructor Details

Obj

public Obj()

Method Details

newMap

public static Map<String,Object> newMap()

Helper function for creating maps and tuning them as necessary.

Returns:

A new Map instance.

newMap

public static Map<String,Object> newMap(String key,
 Object value)

Helper function for creating maps and tuning them as necessary.

Parameters:

key - A key to add to the map on creation.

value - A value to attach to the key in the new map.

Returns:

A new Map instance.

get

public static Object get(Map<String,Object> map,
 String... keys)

Used to make getting values from maps embedded in maps embedded in maps easier TODO: roll out the loops for efficiency

Parameters:

map - The map to get a key from

keys - The list of keys to attempt to get from the map. The first key found with a non-null value is returned, or if none are found, the original map is returned.

Returns:

The key from the map, or the original map if none of the keys are found.

put

public static Object put(Object map,
 String key1,
 Object value)

put

public static Object put(Object map,
 String key1,
 String key2,
 Object value)

put

public static Object put(Object map,
 String key1,
 String key2,
 String key3,
 Object value)

put

public static Object put(Object map,
 String key1,
 String key2,
 String key3,
 String key4,
 Object value)

contains

public static boolean contains(Object map,
 String... keys)

remove

public static Object remove(Object map,
 String k1,
 String k2)

equals

public static boolean equals(Object v1,
 Object v2)

A null-safe equals check using v1.equals(v2) if they are both not null.

Parameters:

v1 - The source object for the equals check.

v2 - The object to be checked for equality using the first objects equals method.

Returns:

True if the objects were both null. True if both objects were not null and v1.equals(v2). False otherwise.