eu.chargetime.ocpp.utilities

Class MoreObjects

java.lang.Object

eu.chargetime.ocpp.utilities.MoreObjects

public final class MoreObjects
extends Object

This class consists of static utility methods for operating on objects. These utilities include null-safe or null-tolerant methods for computing the hash code of an object, returning a string for an object, comparing two objects, etc.

Cut and modified version from Guava (needed to minimize dependency tree for client).

Author:

Eugene Pakhomov

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MoreObjects.ToStringHelper Simple decorator to encapsulate actual toString helper implementation.
static class	MoreObjects.ToStringHelperImpl Support class for toStringHelper(java.lang.Object).

Method Summary

Modifier and Type	Method and Description
static byte[]	clone(byte[] array) Creates shallow copy of input array.
static <T> T[]	clone(T[] array) Creates shallow copy of input array.
static boolean	deepEquals(Object a, Object b) Returns true if the arguments are deeply equal to each other and false otherwise.
static boolean	equals(Object a, Object b) Returns true if the arguments are equal to each other and false otherwise.
static int	hash(Object... values) Generates a hash code for a sequence of input values.
static int	hashCode(Object o) Returns the hash code of a non-null argument and 0 for a null argument.
static MoreObjects.ToStringHelper	toStringHelper(Class<?> clazz) Returns helper to generate string representation of given input class.
static MoreObjects.ToStringHelper	toStringHelper(Class<?> clazz, boolean outputFullDetails) Returns helper to generate string representation of given input class.
static MoreObjects.ToStringHelper	toStringHelper(Object self) Returns helper to generate string representation of given input object.
static MoreObjects.ToStringHelper	toStringHelper(Object self, boolean outputFullDetails) Returns helper to generate string representation of given input object.
static MoreObjects.ToStringHelper	toStringHelper(String className) Returns helper to generate string representation of class with given className.
static MoreObjects.ToStringHelper	toStringHelper(String className, boolean outputFullDetails) Returns helper to generate string representation of class with given className.

Methods inherited from class java.lang.Object

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

Method Detail

equals

public static boolean equals(Object a,
                             Object b)

Returns true if the arguments are equal to each other and false otherwise. Consequently, if both arguments are null, true is returned and if exactly one argument is null, false is returned. Otherwise, equality is determined by using the equals method of the first argument.

Parameters:

a - an object

b - an object to be compared with a for equality

Returns:

true if the arguments are equal to each other and false otherwise

See Also:

Object.equals(Object)

deepEquals

public static boolean deepEquals(Object a,
                                 Object b)

Returns true if the arguments are deeply equal to each other and false otherwise.

Two null values are deeply equal. If both arguments are arrays, the algorithm in Arrays.deepEquals is used to determine equality. Otherwise, equality is determined by using the equals method of the first argument.

Parameters:

a - an object

b - an object to be compared with a for deep equality

Returns:

true if the arguments are deeply equal to each other and false otherwise

See Also:

Arrays.deepEquals(Object[], Object[]), equals(Object, Object)

hashCode

public static int hashCode(Object o)

Returns the hash code of a non-null argument and 0 for a null argument.

Parameters:

o - an object

Returns:

the hash code of a non-null argument and 0 for a null argument

See Also:

Object.hashCode()

hash

public static int hash(Object... values)

Generates a hash code for a sequence of input values. The hash code is generated as if all the input values were placed into an array, and that array were hashed by calling Arrays.hashCode(Object[]).

This method is useful for implementing Object.hashCode() on objects containing multiple fields. For example, if an object that has three fields, x, y, and z, one could write:

 @Override public int hashCode() {
     return Objects.hash(x, y, z);
 }
 

Warning: When a single object reference is supplied, the returned value does not equal the hash code of that object reference. This value can be computed by calling hashCode(Object).

Parameters:

values - the values to be hashed

Returns:

a hash value of the sequence of input values

See Also:

Arrays.hashCode(Object[])

clone

public static <T> T[] clone(T[] array)

Creates shallow copy of input array. Returns null in case when null is passed as argument.

Type Parameters:

T - type of passed array elements

Parameters:

array - the array to be copied

Returns:

copy of input array or null in case when null is passed as argument

clone

public static byte[] clone(byte[] array)

Creates shallow copy of input array. Returns null in case when null is passed as argument.

Parameters:

array - the array to be copied

Returns:

copy of input array or null in case when null is passed as argument

toStringHelper

public static MoreObjects.ToStringHelper toStringHelper(Object self)

Returns helper to generate string representation of given input object.

Parameters:

self - the object to be represented as string

Returns:

helper to generate string representation of given input object

toStringHelper

public static MoreObjects.ToStringHelper toStringHelper(Object self,
                                                        boolean outputFullDetails)

Returns helper to generate string representation of given input object.

Parameters:

self - the object to be represented as string

outputFullDetails - the flag to be set to output all elements of container (list, set, queue, map) or array of objects

Returns:

helper to generate string representation of given input object

toStringHelper

public static MoreObjects.ToStringHelper toStringHelper(Class<?> clazz)

Returns helper to generate string representation of given input class.

Parameters:

clazz - the class to be represented as string

Returns:

helper to generate string representation of given input class

toStringHelper

public static MoreObjects.ToStringHelper toStringHelper(Class<?> clazz,
                                                        boolean outputFullDetails)

Returns helper to generate string representation of given input class.

Parameters:

clazz - the class to be represented as string

outputFullDetails - the flag to be set to output all elements of container (list, set, queue, map) or array of objects

Returns:

helper to generate string representation of given input class

toStringHelper

public static MoreObjects.ToStringHelper toStringHelper(String className)

Returns helper to generate string representation of class with given className.

Parameters:

className - the name of class to be represented as string

Returns:

helper to generate string representation of class with given className

toStringHelper

public static MoreObjects.ToStringHelper toStringHelper(String className,
                                                        boolean outputFullDetails)

Returns helper to generate string representation of class with given className.

Parameters:

className - the name of class to be represented as string

outputFullDetails - the flag to be set to output all elements of container (list, set, queue, map) or array of objects

Returns:

helper to generate string representation of class with given className