org.ujorm.tools.common

Class ObjectUtils

java.lang.Object

org.ujorm.tools.common.ObjectUtils

public abstract class ObjectUtils
extends Object

Static methods

Method Summary

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

iof

public static final <V,R> Optional<R> iof(@Nullable
                                          Object value,
                                          @Nonnull
                                          Class<V> requiredClass,
                                          @Nonnull
                                          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
                                      Object value,
                                      @Nonnull
                                      Class<V> requiredClass,
                                      @Nonnull
                                      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

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

Convert appendable to object type of PrintWriter