Package tools.common

Class ObjectUtils

java.lang.Object

tools.common.ObjectUtils

public abstract class ObjectUtils
extends Object

Static methods

Author:

Pavel Ponec

Method Summary

Modifier and Type	Method	Description
static final <V> boolean	check(@Nullable Object value, @NotNull Class<V> requiredClass, @NotNull Function<V,Boolean> function)	Check the result of a function in case the value have got the same class as the required one.
static final <V, R> Optional<R>	iof(@Nullable Object value, @NotNull Class<V> requiredClass, @NotNull Function<V,R> function)	Run a function in case the value is an instance of the required class.
static @NotNull PrintWriter	toPrintWriter(@NotNull Appendable appendable)	Convert appendable to object type of PrintWriter

Methods inherited from class java.lang.Object

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

Method Details

iof

public static final <V,
R> Optional<R> iof(@Nullable
 @Nullable Object value,
 @NotNull
 @NotNull Class<V> requiredClass,
 @NotNull
 @NotNull Function<V,R> function)

Run a function in case the value is an instance of the required class.
Usage:

   Object input = "ABC";
   int result = ObjectUtils.iof(input, String.class, v -> v.length()).orElse(0);
   assertEquals(3, result);
 

check

public static final <V> boolean check(@Nullable
 @Nullable Object value,
 @NotNull
 @NotNull Class<V> requiredClass,
 @NotNull
 @NotNull Function<V,Boolean> function)

Check the result of a function in case the value have got the same class as the required one.
Usage:

   Object input = "ABC";
   int result = ObjectUtils.check(input, String.class, v -> v.length()).orElse(0);
   assertEquals(3, result);
 

toPrintWriter

@NotNull
public static @NotNull PrintWriter toPrintWriter(@NotNull
 @NotNull Appendable appendable)

Convert appendable to object type of PrintWriter