org.mod4j.runtime.validation.MinValueValidator Maven / Gradle / Ivy

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This module contains a small number of Java classes and Spring configuration files used in applications generated by mod4j.

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package org.mod4j.runtime.validation;

import org.springframework.util.Assert;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;

/**
 * @author Eric Jan Malotaux
 * 
 */
public class MinValueValidator implements Validator {

    private String field;

    private long min;

    private Class clazz;

    /**
     * @param field
     * @param min
     */
    public MinValueValidator(Class clazz, String field, long min) {
        this.clazz = clazz;
        this.field = field;
        this.min = min;
    }

    @SuppressWarnings("unchecked")
    public boolean supports(Class clazz) {
        return this.clazz.isAssignableFrom(clazz);
    }

    public void validate(Object target, Errors errors) {

        Long value = null;

        if (errors.getFieldValue(field) instanceof Integer) {
            value = ((Integer) errors.getFieldValue(field)).longValue();
        } else if (errors.getFieldValue(field) instanceof Long) {
            value = ((Long) errors.getFieldValue(field));
        }

        if (value != null) {
            Assert.notNull(value);
            if (value < min) {
                errors.rejectValue(field, "field.value.min", new Long[] { new Long(min), new Long(value) }, field
                        + " should be at least " + min + ", but was " + value);
            }
        }
    }
}