/*
* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.richfaces.view.facelets.html;
import java.io.IOException;
import java.util.Arrays;
import java.util.Iterator;
import javax.el.ELException;
import javax.faces.FacesException;
import javax.faces.component.EditableValueHolder;
import javax.faces.component.StateHolder;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.ComponentSystemEvent;
import javax.faces.event.ComponentSystemEventListener;
import javax.faces.event.PostAddToViewEvent;
import javax.faces.validator.BeanValidator;
import javax.faces.validator.Validator;
import javax.faces.view.facelets.ComponentConfig;
import javax.faces.view.facelets.ComponentHandler;
import javax.faces.view.facelets.FaceletContext;
import org.richfaces.component.AbstractGraphValidator;
import org.richfaces.validator.FacesBeanValidator;
import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.collect.Iterables;
/**
* @author Nick Belaevski
*
*/
public class GraphValidatorHandler extends ComponentHandler {
private static final Joiner GROUPS_JOINER = Joiner.on(BeanValidator.VALIDATION_GROUPS_DELIMITER);
private static final Function<Class<?>, String> CLASS_TO_NAME = new Function<Class<?>, String>() {
public String apply(Class<?> input) {
return input.getName();
}
};
private class FacesBeanValidatorAddListener implements ComponentSystemEventListener, StateHolder {
private final SetupValidatorsParameter parameterObject;
public FacesBeanValidatorAddListener(SetupValidatorsParameter parameterObject) {
this.parameterObject = parameterObject;
}
public void processEvent(ComponentSystemEvent event) throws AbortProcessingException {
setupValidators(parameterObject, event.getComponent());
}
public Object saveState(FacesContext context) {
throw new UnsupportedOperationException();
}
public void restoreState(FacesContext context, Object state) {
throw new UnsupportedOperationException();
}
public boolean isTransient() {
return true;
}
public void setTransient(boolean newTransientValue) {
throw new UnsupportedOperationException();
}
}
public GraphValidatorHandler(ComponentConfig config) {
super(config);
}
private Class<? extends Validator> getBuiltInBeanValidatorClass(FacesContext context) {
try {
Validator beanValidator = context.getApplication().createValidator(BeanValidator.VALIDATOR_ID);
return beanValidator.getClass();
} catch(FacesException e){
return null;
}
}
private void setupValidators(SetupValidatorsParameter parameterObject, UIComponent component) {
if (component.getChildCount() == 0 && component.getFacetCount() == 0) {
return;
}
Iterator<UIComponent> facetsAndChildren = component.getFacetsAndChildren();
while (facetsAndChildren.hasNext()) {
UIComponent child = facetsAndChildren.next();
if (child instanceof EditableValueHolder) {
EditableValueHolder input = (EditableValueHolder) child;
setupValidator(parameterObject, input);
}
if (!(child instanceof AbstractGraphValidator)) {
// don't setup validators for nested GVs
setupValidators(parameterObject, child);
}
}
}
/**
* @param context TODO
* @param input
* @param defaultValidatorClass TODO
*/
private void setupValidator(SetupValidatorsParameter parameterObject, EditableValueHolder input) {
boolean addBeanValidator = true;
Validator defaultValidator = null;
Validator beanValidator = parameterObject.getValidator();
Validator[] validators = input.getValidators();
for (int i = 0; i < validators.length; i++) {
Validator nextValidator = validators[i];
if (nextValidator.getClass().equals(beanValidator.getClass())) {
addBeanValidator = false;
} else if (nextValidator.getClass().equals(parameterObject.getDefaultValidatorClass())) {
defaultValidator = nextValidator;
}
}
if (defaultValidator != null && defaultValidator instanceof BeanValidator) {
if (beanValidator instanceof FacesBeanValidator) {
FacesBeanValidator facesBeanValidator = (FacesBeanValidator) beanValidator;
facesBeanValidator.setValidateFields(false);
}
BeanValidator defaultBeanValidator = (BeanValidator) defaultValidator;
Class<?>[] groups = parameterObject.getGroups();
if(null == defaultBeanValidator.getValidationGroups() && null != groups && groups.length >0){
defaultBeanValidator.setValidationGroups(GROUPS_JOINER.join(Iterables.transform(Arrays.asList(groups), CLASS_TO_NAME)));
}
}
if (addBeanValidator) {
input.addValidator(beanValidator);
}
}
@Override
public void applyNextHandler(FaceletContext ctx, UIComponent c) throws IOException, FacesException, ELException {
super.applyNextHandler(ctx, c);
if (c instanceof AbstractGraphValidator) {
AbstractGraphValidator graphValidator = (AbstractGraphValidator) c;
FacesContext facesContext = ctx.getFacesContext();
SetupValidatorsParameter parameterObject = new SetupValidatorsParameter(graphValidator, getBuiltInBeanValidatorClass(facesContext), graphValidator.getGroups());
if (c.isInView()) {
setupValidators(parameterObject, c);
} else {
c.subscribeToEvent(PostAddToViewEvent.class, new FacesBeanValidatorAddListener(parameterObject));
}
}
}
}