/**
* 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.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.EmptyStackException;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Locale;
import java.util.Map;
import java.util.MissingResourceException;
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;
import org.hibernate.validator.MessageInterpolator;
import org.hibernate.validator.Validator;
/**
* Perform validation by Hibernate Validator annotations
*
* @author asmirnov
*
*/
public class HibernateValidator extends ObjectValidator {
static final String DEFAULT_VALIDATOR_MESSAGES = "org.hibernate.validator.resources.DefaultValidatorMessages";
static final String VALIDATOR_MESSAGES = "ValidatorMessages";
private Map<ValidatorKey, ClassValidator<? extends Object>> classValidators = new ConcurrentHashMap<ValidatorKey, ClassValidator<? extends Object>>();
HibernateValidator() {
super();
// This is a "singleton"-like class. Only factory methods allowed.
// Enforce class to load
ClassValidator.class.getName();
}
HibernateValidator(ObjectValidator parent){
super(parent);
// This is a "singleton"-like class. Only factory methods allowed.
// Enforce class to load
ClassValidator.class.getName();
}
@Override
@SuppressWarnings("unchecked")
public Collection<String> validateGraph(FacesContext context, Object value,
Set<String> profiles) {
if (null == context) {
throw new FacesException(INPUT_PARAMETERS_IS_NOT_CORRECT);
}
Collection<String> validationMessages = null;
if (null != value) {
ClassValidator<Object> validator = (ClassValidator<Object>) getValidator(
context, value.getClass());
if (validator.hasValidationRules()) {
InvalidValue[] invalidValues = validator
.getInvalidValues(value);
if (null != invalidValues && invalidValues.length > 0) {
validationMessages = new ArrayList<String>(invalidValues.length);
for (int i = 0; i < invalidValues.length; i++) {
InvalidValue invalidValue = invalidValues[i];
validationMessages.add(invalidValue.getMessage());
}
}
}
if(null != parent){
Collection<String> parentMessages = parent.validateGraph(context, value, profiles);
if(null != validationMessages){
if (null != parentMessages) {
validationMessages.addAll(parentMessages);
}
} else {
validationMessages = parentMessages;
}
}
}
return validationMessages;
}
/**
* Validate bean property in the base class aganist new value.
* @param beanClass
* @param property
* @param value
*
* @return
*/
protected InvalidValue[] validateClass(FacesContext facesContext,
Class<? extends Object> beanClass, String property, Object value) {
ClassValidator<? extends Object> classValidator =
getValidator(facesContext, beanClass);
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(
FacesContext facesContext, Class<? extends Object> beanClass) {
// TODO - localization support.
ValidatorKey key = new ValidatorKey(beanClass, calculateLocale(facesContext));
ClassValidator result = classValidators.get(key);
if (null == result) {
result = createValidator(facesContext, beanClass);
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(
FacesContext facesContext, Class<? extends Object> beanClass) {
ResourceBundle bundle = createHibernateMessages(facesContext);
return bundle == null ? new ClassValidator(beanClass)
: new ClassValidator(beanClass, bundle);
}
/**
* @param facesContext
* @return
*/
protected ResourceBundle createHibernateMessages(FacesContext facesContext) {
ResourceBundle bundle = getResourceBundle(facesContext, VALIDATOR_MESSAGES);
ResourceBundle defaultMessagesBundle = getResourceBundle(facesContext, DEFAULT_VALIDATOR_MESSAGES);
if(null != bundle && defaultMessagesBundle != null){
bundle = new ResourceBundleChain(bundle, defaultMessagesBundle);
} else if(null != defaultMessagesBundle){
bundle = defaultMessagesBundle;
}
return bundle;
}
@Override
protected Collection<String> validate(FacesContext facesContext, Object base, String property,
Object value, Set<String> profiles) {
InvalidValue[] invalidValues = validateBean(facesContext, base, property,
value);
if (null == invalidValues) {
return null;
} else {
Collection<String> result = new ArrayList<String>(invalidValues.length);
for (int i = 0; i < invalidValues.length; i++) {
InvalidValue invalidValue = invalidValues[i];
result.add(invalidValue.getMessage());
}
return result;
}
}
/**
* Validate bean property of the base object aganist new value
* @param base
* @param property
* @param value
*
* @return
*/
protected InvalidValue[] validateBean(FacesContext facesContext, Object base, String property,
Object value) {
Class<? extends Object> beanClass = base.getClass();
InvalidValue[] invalidValues = validateClass(facesContext, beanClass, property, value);
return invalidValues;
}
private static class JsfMessageInterpolator implements MessageInterpolator {
private Locale locale;
private MessageInterpolator delegate;
public JsfMessageInterpolator(Locale locale,
MessageInterpolator delegate) {
this.locale = locale;
this.delegate = delegate;
}
public String interpolate(String message, Validator validator,
MessageInterpolator defaultInterpolator) {
return delegate.interpolate(message, validator, defaultInterpolator);
}
}
static class ResourceBundleChain extends ResourceBundle {
private final ResourceBundle delegate;
public ResourceBundleChain(ResourceBundle delegate, ResourceBundle parent) {
this.delegate = delegate;
setParent(parent);
}
@Override
public Enumeration<String> getKeys() {
// TODO Auto-generated method stub
return null!=delegate?delegate.getKeys():Collections.<String>enumeration(Collections.<String>emptyList());
}
@Override
protected Object handleGetObject(String key) {
try {
return null != delegate ? delegate.getObject(key) : null;
} catch (MissingResourceException e) {
return null;
}
}
@Override
public Locale getLocale() {
return null!=delegate?delegate.getLocale():null;
}
}
}