/*
* This file is part of rockframework.
*
* rockframework is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* rockframework 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>;.
*/
package br.net.woodstock.rockframework.web.faces.utils;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.ResourceBundle;
import javax.el.ELContext;
import javax.el.ExpressionFactory;
import javax.el.ValueExpression;
import javax.faces.application.Application;
import javax.faces.application.FacesMessage;
import javax.faces.application.FacesMessage.Severity;
import javax.faces.context.FacesContext;
import javax.faces.model.SelectItem;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import br.net.woodstock.rockframework.core.util.LabelSupport;
import br.net.woodstock.rockframework.core.utils.Conditions;
import br.net.woodstock.rockframework.core.utils.Enums;
import br.net.woodstock.rockframework.web.common.utils.HttpServletResponses;
public abstract class FacesContexts {
private FacesContexts() {
//
}
// Faces
public static void addMessage(final String message) {
FacesContexts.addMessage(FacesMessage.SEVERITY_INFO, message, null);
}
public static void addMessage(final Severity severity, final String message, final String detail) {
FacesContext fc = FacesContexts.getFacesContext();
fc.addMessage(null, new FacesMessage(severity, message, detail));
}
public static void addError(final Exception exception) {
FacesContext fc = FacesContexts.getFacesContext();
fc.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, exception.getMessage(), null));
}
public static FacesContext getFacesContext() {
return FacesContext.getCurrentInstance();
}
public static ResourceBundle getResourceBundle(final String name) {
FacesContext fc = FacesContexts.getFacesContext();
Application application = fc.getApplication();
ResourceBundle resource = application.getResourceBundle(fc, name);
return resource;
}
@SuppressWarnings({ "cast", "unchecked" })
public static <T> T getBean(final String name, final Class<T> clazz) {
FacesContext fc = FacesContexts.getFacesContext();
Application app = fc.getApplication();
ELContext el = fc.getELContext();
ExpressionFactory factory = app.getExpressionFactory();
ValueExpression expression = (ValueExpression) factory.createValueExpression(el, "#{" + name + "}", clazz);
T value = (T) expression.getValue(el);
return value;
}
public static String getMessage(final String name, final String key) {
FacesContext context = FacesContext.getCurrentInstance();
Application application = context.getApplication();
ResourceBundle bundle = application.getResourceBundle(context, name);
String message = bundle.getString(key);
return message;
}
// Http
public static HttpServletRequest getRequest() {
FacesContext fc = FacesContexts.getFacesContext();
return (HttpServletRequest) fc.getExternalContext().getRequest();
}
public static HttpServletResponse getResponse() {
FacesContext fc = FacesContexts.getFacesContext();
return (HttpServletResponse) fc.getExternalContext().getResponse();
}
public static HttpSession getSession() {
FacesContext fc = FacesContexts.getFacesContext();
return (HttpSession) fc.getExternalContext().getSession(true);
}
public static ServletContext getServletContext() {
FacesContext fc = FacesContexts.getFacesContext();
return (ServletContext) fc.getExternalContext().getContext();
}
// Utils
public static void download(final byte[] bytes, final String fileName) throws IOException {
FacesContext fc = FacesContexts.getFacesContext();
HttpServletResponse response = FacesContexts.getResponse();
HttpServletResponses.download(response, bytes, fileName);
fc.responseComplete();
}
// SelectItems
public static List<SelectItem> getItemsFromEnum(final Class<? extends Enum<?>> clazz) {
return FacesContexts.getItemsFromEnum(clazz, null);
}
public static List<SelectItem> getItemsFromMap(final Map<Object, Object> map) {
return FacesContexts.getItemsFromMap(map, null);
}
@SuppressWarnings("rawtypes")
public static List<SelectItem> getItemsFromEnum(final Class<? extends Enum<?>> clazz, final String noSelectionLabel) {
List<SelectItem> list = new ArrayList<SelectItem>();
if (Conditions.isNotEmpty(noSelectionLabel)) {
SelectItem selectItem = new SelectItem(null, noSelectionLabel, null, false, true);
list.add(selectItem);
}
Enum[] array = Enums.getValues(clazz);
for (Enum tmp : array) {
String value = tmp.name();
String label = null;
if (tmp instanceof LabelSupport) {
LabelSupport le = (LabelSupport) tmp;
label = le.getLabel();
} else {
label = tmp.name();
}
list.add(new SelectItem(value, label));
}
return list;
}
public static List<SelectItem> getItemsFromMap(final Map<Object, Object> map, final String noSelectionLabel) {
List<SelectItem> list = new ArrayList<SelectItem>();
if (Conditions.isNotEmpty(noSelectionLabel)) {
SelectItem selectItem = new SelectItem(null, noSelectionLabel, null, false, true);
list.add(selectItem);
}
for (Entry<Object, Object> entry : map.entrySet()) {
Object value = entry.getKey();
String label = null;
if (entry.getValue() != null) {
label = entry.getValue().toString();
} else {
label = entry.getKey().toString();
}
list.add(new SelectItem(value, label));
}
return list;
}
}