/**
* License Agreement.
*
* Rich Faces - Natural Ajax for Java Server Faces (JSF)
*
* Copyright (C) 2007 Exadel, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.richfaces.validator;
import java.beans.FeatureDescriptor;
import java.util.Collection;
import java.util.EmptyStackException;
import java.util.Iterator;
import java.util.Locale;
import java.util.Map;
import java.util.ResourceBundle;
import java.util.Set;
import java.util.Stack;
import java.util.concurrent.ConcurrentHashMap;
import javax.el.ELResolver;
import javax.faces.FacesException;
import javax.faces.context.FacesContext;
import org.hibernate.validator.ClassValidator;
import org.hibernate.validator.InvalidValue;
/**
* Perform validation by Hibernate Validator annotations
*
* @author asmirnov
*
*/
public class HibernateValidator extends ObjectValidator {
private Map<ValidatorKey, ClassValidator<? extends Object>> classValidators = new ConcurrentHashMap<ValidatorKey, ClassValidator<? extends Object>>();
HibernateValidator() {
// This is a "singleton"-like class. Only factory methods allowed.
// Enforce class to load
ClassValidator.class.getName();
}
@Override
@SuppressWarnings("unchecked")
public String[] validateGraph(FacesContext context, Object value,
Set<String> profiles) {
if (null == context) {
throw new FacesException(INPUT_PARAMETERS_IS_NOT_CORRECT);
}
String validationMessages[] = null;
if (null != value) {
ClassValidator<Object> validator = (ClassValidator<Object>) getValidator(
value.getClass(), calculateLocale(context));
if (validator.hasValidationRules()) {
InvalidValue[] invalidValues = validator
.getInvalidValues(value);
if (null != invalidValues && invalidValues.length > 0) {
validationMessages = new String[invalidValues.length];
for (int i = 0; i < invalidValues.length; i++) {
InvalidValue invalidValue = invalidValues[i];
validationMessages[i] = invalidValue.getMessage();
}
}
}
}
return validationMessages;
}
/**
* Validate bean property in the base class aganist new value.
*
* @param beanClass
* @param property
* @param value
* @return
*/
protected InvalidValue[] validateClass(Class<? extends Object> beanClass,
String property, Object value, Locale locale) {
ClassValidator<? extends Object> classValidator = getValidator(
beanClass, locale);
InvalidValue[] invalidValues = classValidator
.getPotentialInvalidValues(property, value);
return invalidValues;
}
/**
* Get ( or create ) {@link ClassValidator} for a given bean class.
*
* @param beanClass
* @return
*/
@SuppressWarnings("unchecked")
protected ClassValidator<? extends Object> getValidator(
Class<? extends Object> beanClass, Locale locale) {
// TODO - localization support.
ValidatorKey key = new ValidatorKey(beanClass, locale);
ClassValidator result = classValidators.get(key);
if (null == result) {
result = createValidator(beanClass, locale);
classValidators.put(key, result);
}
return result;
}
/*
* Method for create new instance of ClassValidator, if same not in cache.
*
* @param beanClass - Class to validate @param locale - user Locale, used
* during validation process @return ClassValidator instance
*/
@SuppressWarnings("unchecked")
protected ClassValidator<? extends Object> createValidator(
Class<? extends Object> beanClass, Locale locale) {
ResourceBundle bundle = getCurrentResourceBundle(locale);
return bundle == null ? new ClassValidator(beanClass)
: new ClassValidator(beanClass, bundle);
}
@Override
protected String[] validate(Object base, String property, Object value,
Locale locale, Set<String> profiles) {
InvalidValue[] invalidValues = validateBean(base, property, value,
locale);
if (null == invalidValues) {
return null;
} else {
String[] result = new String[invalidValues.length];
for (int i = 0; i < invalidValues.length; i++) {
InvalidValue invalidValue = invalidValues[i];
result[i] = invalidValue.getMessage();
}
return result;
}
}
/**
* Validate bean property of the base object aganist new value
*
* @param base
* @param property
* @param value
* @return
*/
protected InvalidValue[] validateBean(Object base, String property, Object value,
Locale locale) {
Class<? extends Object> beanClass = base.getClass();
InvalidValue[] invalidValues = validateClass(beanClass, property,
value, locale);
return invalidValues;
}
}