com.igormaznitsa.meta.common.utils

Class GetUtils

java.lang.Object

com.igormaznitsa.meta.common.utils.GetUtils

@Weight(value=LIGHT)
public final class GetUtils
extends java.lang.Object

Auxiliary methods to get values.

Since:

1.0

Constructor Summary

Constructors

Modifier	Constructor and Description
private	GetUtils()

Method Summary

Modifier and Type	Method and Description
static <T> T	ensureNonNull(T value) Get value if it is not null.
static <T> T	ensureNonNull(T value, T defaultValue) Get value and ensure that the value is not null
static java.lang.String	ensureNonNullAndNonEmpty(java.lang.String value, java.lang.String dflt) Get non-null non-empty string.
static java.lang.String	ensureNonNullStr(java.lang.String value) Ensure that a string will not be null.
static <T> T	findFirstNonNull(T... objects) Find the first non-null value in an array and return that.

Methods inherited from class java.lang.Object

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

Constructor Detail

GetUtils

private GetUtils()

Method Detail

ensureNonNull

public static <T> T ensureNonNull(T value,
                                  T defaultValue)

Get value and ensure that the value is not null

Type Parameters:

T - type of value

Parameters:

value - the value

defaultValue - the default value to be returned if the value is null

Returns:

not null value

Throws:

java.lang.AssertionError - if both the value and the default value are null

Since:

1.0

ensureNonNull

public static <T> T ensureNonNull(T value)

Get value if it is not null.

Type Parameters:

T - type of value

Parameters:

value - the value

Returns:

the value if it is not null

Throws:

java.lang.AssertionError - if the value is null

Since:

1.0

findFirstNonNull

public static <T> T findFirstNonNull(T... objects)

Find the first non-null value in an array and return that.

Type Parameters:

T - type of value

Parameters:

objects - array to find value

Returns:

the first non-null value from the array

Throws:

java.lang.AssertionError - if the array is null or it doesn't contain a non-null value

Since:

1.0

ensureNonNullAndNonEmpty

public static java.lang.String ensureNonNullAndNonEmpty(java.lang.String value,
                                                        @Constraint(value="notEmpty(X)")
                                                        java.lang.String dflt)

Get non-null non-empty string.

Parameters:

value - a base string

dflt - default string to be provided if value is null or empty

Returns:

non-nullable non-empty string

Since:

1.1.1

ensureNonNullStr

public static java.lang.String ensureNonNullStr(java.lang.String value)

Ensure that a string will not be null.

Parameters:

value - value to be checked

Returns:

the value if it is not null or empty string if the value is null

Since:

1.1.1