nl.vpro.validation.StringListValidator Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of media-domain Show documentation

The basic domain classes for 'media', the core of POMS. Also, the 'update' XML bindings for it. It also contains some closely related domain classes like the enum to contain NICAM kijkwijzer settings.

There is a newer version: 8.3.1

Show newest version

package nl.vpro.validation;

import java.util.Collection;
import java.util.regex.Pattern;

import jakarta.validation.ConstraintValidator;
import jakarta.validation.ConstraintValidatorContext;

/**
 * @author Michiel Meeuwissen
 * @since 3.1.0
 */
public class StringListValidator implements ConstraintValidator> {

    private int maxLength = Integer.MAX_VALUE;
    private int minLength = 0;
    private boolean notNull = true;
    private Pattern pattern = null;


    @Override
    public void initialize(StringList stringList) {
        maxLength = stringList.maxLength();
        minLength = stringList.minLenght();
        notNull = stringList.notNull();
        String p = stringList.pattern();
        pattern = ".*".equals(p) || p == null ? null : Pattern.compile(p);

    }

    @Override
    public boolean isValid(Collection value, ConstraintValidatorContext context) {
        if (value == null) return true;
        int i = -1;
        StringBuilder message = new StringBuilder();
        for (String s : value) {
            i++;
            if (s == null) {
                if (notNull) {
                    appendError(message, i, "value is null");
                }
                continue;
            }
            if (s.length() > maxLength) {
                appendError(message, i, "value is longer than {maxLength}");
            }
            if (s.length() < minLength) {
                appendError(message, i, "value is smaller than {minLength}");
            }
            if (pattern != null && !pattern.matcher(s).matches()) {
                appendError(message, i, "value does not match {pattern}");
            }
        }
        if (!message.isEmpty()) {
            context.disableDefaultConstraintViolation();
            context.buildConstraintViolationWithTemplate(message.toString()).addConstraintViolation();
            return false;
        }
        return true;
    }
    private void appendError(StringBuilder message, int i, String template) {
        if (!message.isEmpty()) {
            message.append("\n");
        }
        message.append('[').append(i).append("] ").append(template);
    }

}