Validators.java

package com.twasyl.slideshowfx.ui.controls.validators;

/**
 * Class providing implementation of {@link IValidator}.
 *
 * @author Thierry Wasylczenko
 * @version 1.0
 * @since SlideshowFX 1.3
 */
public final class Validators {

    /**
     * Creates a validator checking a given string is not empty. If the string is {@code null}, the string is
     * considered invalid.
     *
     * @return A validator checking non empty strings.
     */
    public static IValidator<String> isNotEmpty() {
        return (value) -> value != null && !value.trim().isEmpty();
    }

    /**
     * Creates a validator checking a given string is an integer.
     *
     * @return A validator checking integer strings.
     */
    public static IValidator<String> isInteger() {
        return (value) -> {
            try {
                Integer.parseInt(value);
                return true;
            } catch (NumberFormatException ex) {
                return false;
            }
        };
    }
}