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jFormchecker integration utils that connects it to frameworks/APIs
package de.jformchecker.utils;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.time.LocalDate;
import java.util.Date;
import java.util.List;
import org.apache.commons.beanutils.PropertyUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import de.jformchecker.FormCheckerElement;
import de.jformchecker.FormCheckerForm;
import de.jformchecker.elements.CheckboxInput;
import de.jformchecker.elements.DateInputCompound;
import de.jformchecker.elements.IgnoreFormElement;
import de.jformchecker.elements.Label;
import de.jformchecker.elements.LongTextInput;
import de.jformchecker.elements.NumberInput;
import de.jformchecker.elements.TextInput;
import de.jformchecker.fieldmarkers.FieldType;
import de.jformchecker.fieldmarkers.LongText;
/**
* Helps working with Beans. Can transfer beans to forms and vice versa.
*
* @author jochen
*
*/
public class BeanUtils {
final static Logger logger = LoggerFactory.getLogger(BeanUtils.class);
public static FormCheckerForm fromBean(Object o) {
FormCheckerForm f = new FormCheckerForm() {
private Object connectedBean;
@Override
public void init() {
connectedBean = o;
try {
for (Field f : o.getClass().getDeclaredFields()) { // TODO: Either check the fields (which is better i think) or read bean-methods. Now it is mixed
// check if it is ignored
IgnoreFormElement ignored = f.getAnnotation(IgnoreFormElement.class);
if (ignored != null) {
continue;
}
String name = f.getName();
Object fieldValue = null;
try {
fieldValue = PropertyUtils.getProperty(o, f.getName());
} catch (InvocationTargetException e) {
// field value is null, no problem
}
String description = name;
Label label = f.getAnnotation(Label.class);
if (label != null) {
description = label.text();
}
FormCheckerElement el;
LongText longTextMarked = f.getAnnotation(LongText.class);
if (longTextMarked != null) {
el = LongTextInput.build(name).setDescription(description);
if (fieldValue != null) {
el.setPreSetValue(fieldValue.toString());
}
} else
if (f.getAnnotation(FieldType.class) != null) {
FieldType fieldType = f.getAnnotation(FieldType.class);
Class c = fieldType.type();
FormCheckerElement i = c.newInstance();
i.setDescription(description);
i.setName(name);
el = i;
}
else if (fieldValue instanceof Boolean) {
el = CheckboxInput.build(name).setDescription(description);
if (fieldValue != null) {
el.setPreSetValue(fieldValue.toString());
}
} else if (fieldValue instanceof LocalDate) { // We
// prefer
// the
// Java
// 8
// API!
LocalDate dateVal = (LocalDate) fieldValue;
el = DateInputCompound.build(name).presetValue(java.sql.Date.valueOf(dateVal))
.setDescription(description);
} else if (fieldValue instanceof Integer) {
Integer intVal = (Integer) fieldValue;
el = NumberInput.build(name).presetIntValue(intVal).setDescription(description);
if (fieldValue != null) {
((NumberInput) el).presetIntValue(intVal);
}
} else {
el = TextInput.build(name).setDescription(description);
if (fieldValue != null) {
el.setPreSetValue(fieldValue.toString());
}
}
this.add(el);
}
} catch (IllegalAccessException | NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// first, fill bean with result of form!
try {
BeanUtils.fillBean(this, o);
addFormValidator(new BeanValidationFormValidator(o));
} catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
// Run hook if bean wants it to tweak additional things
if (o instanceof FormCheckerBean) {
((FormCheckerBean) o).preRun(f);
}
return f;
}
public static void fillBean(FormCheckerForm form, Object bean)
throws IllegalAccessException, InvocationTargetException, NoSuchMethodException {
List elements = form.getElements();
for (FormCheckerElement elem : elements) {
String key = elem.getName();
if (PropertyUtils.isWriteable(bean, key)) {
PropertyDescriptor pd = PropertyUtils.getPropertyDescriptor(bean, key);
Object className = pd.getPropertyType().getName();
if (className.equals("java.lang.String")) {
PropertyUtils.setSimpleProperty(bean, key, elem.getValue());
} else if (className.equals("java.lang.Boolean") || className.equals("boolean")) {
if ("true".equals(elem.getValue())) {
PropertyUtils.setSimpleProperty(bean, key, true);
} else {
PropertyUtils.setSimpleProperty(bean, key, false);
}
} else if (className.equals("java.lang.Integer") || className.equals("int")) {
try {
if (elem.getValue() != null && !"".equals(elem.getValue())) {
PropertyUtils.setSimpleProperty(bean, key, Integer.parseInt(elem.getValue()));
}
} catch (NumberFormatException e) {
logger.info("unable to set int property because can not parse to int", e);
}
} else if (className.equals("java.lang.Long") || className.equals("long")) {
try {
PropertyUtils.setSimpleProperty(bean, key, Long.parseLong(elem.getValue()));
} catch (NumberFormatException e) {
logger.info("unable to set long property because can not parse to int", e);
}
} else if (className.equals("java.time.LocalDate")) {
if (elem instanceof DateInputCompound) {
Date dateVal = ((DateInputCompound) elem).getDateValue();
LocalDate dateValLocalDate = new java.sql.Date(dateVal.getTime()).toLocalDate();
PropertyUtils.setSimpleProperty(bean, key, dateValLocalDate);
}
}
} else {
logger.info("unable to fill property coming from form: " + key);
}
}
// Run hook if bean wants it to get additionalThings out of the form
if (bean instanceof FormCheckerBean) {
((FormCheckerBean) bean).postRun(form);
}
}
}