io.virtdata.libbasics.shared.from_string.to_unset.NullIfNullOrEmpty Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of virtdata-lib-realer Show documentation

With inspiration from other libraries

There is a newer version: 2.12.15

package io.virtdata.libbasics.shared.from_string.to_unset;

import io.virtdata.annotations.Categories;
import io.virtdata.annotations.Category;
import io.virtdata.annotations.ThreadSafeMapper;

import java.util.function.Function;

/**
 * Yield a null value if the input String is either null or empty.
 */
@Categories(Category.nulls)
@ThreadSafeMapper
public class NullIfNullOrEmpty implements Function {
    
    @Override
    public String apply(String s) {
        if (s==null || s.isEmpty()) {
            return null;
        }
        return s;
    }
}