Class JavaUtils

java.lang.Object

org.springframework.amqp.utils.JavaUtils

public final class JavaUtils
extends Object

Chained utility methods to simplify some Java repetitive code. Obtain a reference to the singleton INSTANCE and then chain calls to the utility methods.

Since:

2.1.4

Author:

Gary Russell, Artem Bilan

Field Summary

Fields

Modifier and Type	Field	Description
static final JavaUtils	INSTANCE	The singleton instance of this utility class.

Method Summary

Modifier and Type	Method	Description
<T> JavaUtils	acceptIfCondition(boolean condition, @Nullable T value, Consumer<T> consumer)	Invoke Consumer.accept(Object) with the value if it is not null and the condition is true.
<T1, T2> JavaUtils	acceptIfCondition(boolean condition, T1 t1, T2 t2, BiConsumer<T1,T2> consumer)	Invoke BiConsumer.accept(Object, Object) with the arguments if the condition is true.
JavaUtils	acceptIfHasText(@Nullable String value, Consumer<String> consumer)	Invoke Consumer.accept(Object) with the value if it is not null or empty.
<T> JavaUtils	acceptIfHasText(T t1, @Nullable String value, BiConsumer<T,String> consumer)	Invoke BiConsumer.accept(Object, Object) with the arguments if the value argument is not null or empty.
<T> JavaUtils	acceptIfNotNull(@Nullable T value, Consumer<T> consumer)	Invoke Consumer.accept(Object) with the value if it is not null.
<T1, T2> JavaUtils	acceptIfNotNull(T1 t1, @Nullable T2 t2, BiConsumer<T1,T2> consumer)	Invoke BiConsumer.accept(Object, Object) with the arguments if the t2 argument is not null.
<T> JavaUtils	acceptOrElseIfNotNull(@Nullable T value, @Nullable T alternative, Consumer<T> consumer)	Invoke Consumer.accept(Object) with the value or alternative if one of them is not null.

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final JavaUtils INSTANCE

The singleton instance of this utility class.

Method Details

acceptIfCondition

public <T> JavaUtils acceptIfCondition(boolean condition,
 @Nullable T value,
 Consumer<T> consumer)

Invoke Consumer.accept(Object) with the value if it is not null and the condition is true.

Type Parameters:

T - the value type.

Parameters:

condition - the condition.

value - the value. Skipped if null.

consumer - the consumer.

Returns:

this.

acceptIfNotNull

public <T> JavaUtils acceptIfNotNull(@Nullable T value,
 Consumer<T> consumer)

Invoke Consumer.accept(Object) with the value if it is not null.

Type Parameters:

T - the value type.

Parameters:

value - the value.

consumer - the consumer.

Returns:

this.

acceptIfHasText

public JavaUtils acceptIfHasText(@Nullable String value,
 Consumer<String> consumer)

Invoke Consumer.accept(Object) with the value if it is not null or empty.

Parameters:

value - the value.

consumer - the consumer.

Returns:

this.

acceptIfCondition

public <T1,
T2> JavaUtils acceptIfCondition(boolean condition,
 T1 t1,
 T2 t2,
 BiConsumer<T1,T2> consumer)

Invoke BiConsumer.accept(Object, Object) with the arguments if the condition is true.

Type Parameters:

T1 - the first argument type.

T2 - the second argument type.

Parameters:

condition - the condition.

t1 - the first consumer argument

t2 - the second consumer argument

consumer - the consumer.

Returns:

this.

acceptIfNotNull

public <T1,
T2> JavaUtils acceptIfNotNull(T1 t1,
 @Nullable T2 t2,
 BiConsumer<T1,T2> consumer)

Invoke BiConsumer.accept(Object, Object) with the arguments if the t2 argument is not null.

Type Parameters:

T1 - the first argument type.

T2 - the second argument type.

Parameters:

t1 - the first argument

t2 - the second consumer argument

consumer - the consumer.

Returns:

this.

acceptIfHasText

public <T> JavaUtils acceptIfHasText(T t1,
 @Nullable String value,
 BiConsumer<T,String> consumer)

Invoke BiConsumer.accept(Object, Object) with the arguments if the value argument is not null or empty.

Type Parameters:

T - the first argument type.

Parameters:

t1 - the first consumer argument.

value - the second consumer argument

consumer - the consumer.

Returns:

this.

acceptOrElseIfNotNull

public <T> JavaUtils acceptOrElseIfNotNull(@Nullable T value,
 @Nullable T alternative,
 Consumer<T> consumer)

Invoke Consumer.accept(Object) with the value or alternative if one of them is not null.

Type Parameters:

T - the value type.

Parameters:

value - the value.

alternative - the other value if the value argument is null.

consumer - the consumer.

Returns:

this.

Since:

4.0