com.igormaznitsa.meta.common.utils

Class GetUtils

java.lang.Object

com.igormaznitsa.meta.common.utils.GetUtils

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

Auxiliary methods to get values.

Since:

1.0

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 String	ensureNonNullAndNonEmpty(String value, String dflt) Get non-null non-empty string.
static String	ensureNonNullStr(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

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:

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:

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:

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

Since:

1.0

ensureNonNullAndNonEmpty

public static String ensureNonNullAndNonEmpty(String value,
                                              @Constraint(value="notEmpty(X)")
                                              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 String ensureNonNullStr(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