Package eu.woolplatform.utils.validation

Class TypeConversion

java.lang.Object

eu.woolplatform.utils.validation.TypeConversion

public class TypeConversion
extends Object

This class can perform various type conversions.

Constructor Summary

Constructors

Constructor	Description
TypeConversion()

Method Summary

Modifier and Type	Method	Description
static Boolean	getBoolean(Object obj)	Converts the specified object to a boolean.
static Double	getDouble(Object obj)	Converts the specified object to a double.
static <T extends Enum<?>> T	getEnum(Object obj, Class<T> enumClass)	Converts the specified object to an enum.
static Integer	getInt(Object obj)	Converts the specified object to an integer.
static <T> T	getJson(Object obj, com.fasterxml.jackson.core.type.TypeReference<T> typeRef)	Converts an object to the specified type using the Jackson ObjectMapper.
static <T> T	getJson(Object obj, Class<T> clazz)	Converts an object to the specified type using the Jackson ObjectMapper.
static Long	getLong(Object obj)	Converts the specified object to a long.
static String	getString(Object obj)	Converts the specified object to a string.

Methods inherited from class java.lang.Object

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

Constructor Detail

TypeConversion

public TypeConversion()

Method Detail

getString

public static String getString(Object obj)

Converts the specified object to a string. If the object is null, this method returns null. Otherwise it will call toString().

Parameters:

obj - the object or null

Returns:

the string or null

getInt

public static Integer getInt(Object obj)
                      throws ParseException

Converts the specified object to an integer. If the object is null, this method returns null. If it's a Number, it will return the integer value. Otherwise it will call toString() and try to parse the string value.

Parameters:

obj - the object or null

Returns:

the integer or null

Throws:

ParseException - if a string value can't be parsed as an integer

getLong

public static Long getLong(Object obj)
                    throws ParseException

Converts the specified object to a long. If the object is null, this method returns null. If it's a Number, it will return the long value. Otherwise it will call toString() and try to parse the string value.

Parameters:

obj - the object or null

Returns:

the long or null

Throws:

ParseException - if a string value can't be parsed as a long

getDouble

public static Double getDouble(Object obj)
                        throws ParseException

Converts the specified object to a double. If the object is null, this method returns null. If it's a Number, it will return the double value. Otherwise it will call toString() and try to parse the string value.

Parameters:

obj - the object or null

Returns:

the double or null

Throws:

ParseException - if a string value can't be parsed as a double

getBoolean

public static Boolean getBoolean(Object obj)
                          throws ParseException

Converts the specified object to a boolean. If the object is null, this method returns null. If it's a Boolean, it will return the boolean value. Otherwise it will call toString() and try to parse the string value.

Parameters:

obj - the object or null

Returns:

the boolean or null

Throws:

ParseException - if a string value can't be parsed as a boolean

getEnum

public static <T extends Enum<?>> T getEnum(Object obj,
                                            Class<T> enumClass)
                                     throws ParseException

Converts the specified object to an enum. If the object is null, this method returns null. If it's an instance of the specified enum class, it just returns the object. Otherwise it gets the string value and does a case-insensitive comparison with the possible enum values.

Type Parameters:

T - the type of enum to return

Parameters:

obj - the object or null

enumClass - the enum class

Returns:

the enum or null

Throws:

ParseException - if the enum value is invalid

getJson

public static <T> T getJson(Object obj,
                            Class<T> clazz)
                     throws ParseException

Converts an object to the specified type using the Jackson ObjectMapper. For example a Map could be converted to an object. This method does not parse JSON strings. If the object is null, this method returns null.

Type Parameters:

T - the return type

Parameters:

obj - the object or null

clazz - the return type

Returns:

the converted object or null

Throws:

ParseException - if the object can't be converted to the specified type

getJson

public static <T> T getJson(Object obj,
                            com.fasterxml.jackson.core.type.TypeReference<T> typeRef)
                     throws ParseException

Converts an object to the specified type using the Jackson ObjectMapper. For example a Map could be converted to an object. This method does not parse JSON strings. If the object is null, this method returns null.

If you want to convert to MyObject, you can specify:
new TypeReference<MyObject>() {}

Type Parameters:

T - the return type

Parameters:

obj - the object or null

typeRef - the return type

Returns:

the converted object or null

Throws:

ParseException - if the object can't be converted to the specified type