/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.deltaspike.jsf.impl.util;
import org.apache.deltaspike.core.api.config.view.metadata.ViewConfigResolver;
import org.apache.deltaspike.core.api.provider.BeanProvider;
import org.apache.deltaspike.core.api.config.view.navigation.NavigationParameterContext;
import org.apache.deltaspike.jsf.api.config.JsfModuleConfig;
import org.apache.deltaspike.jsf.impl.listener.phase.WindowMetaData;
import org.apache.deltaspike.jsf.impl.message.FacesMessageEntry;
import javax.el.ELException;
import javax.enterprise.context.ContextNotActiveException;
import javax.faces.FacesException;
import javax.faces.application.FacesMessage;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.InvocationTargetException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArrayList;
public abstract class JsfUtils
{
private static final String SB_ADD_PARAMETER = "SB:" + JsfUtils.class + "#addParameter";
public static <T> T getValueOfExpression(String expression, Class<T> targetType)
{
FacesContext facesContext = FacesContext.getCurrentInstance();
return facesContext.getApplication().evaluateExpressionGet(facesContext, expression, targetType);
}
public static String getValueOfExpressionAsString(String expression)
{
Object result = getValueOfExpression(expression, Object.class);
return result != null ? result.toString() : "null";
}
public static Set<RequestParameter> getViewConfigPageParameters()
{
ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
Set<RequestParameter> result = new HashSet<RequestParameter>();
if (externalContext == null || //detection of early config for different mojarra versions
externalContext.getRequestParameterValuesMap() == null || externalContext.getRequest() == null)
{
return result;
}
NavigationParameterContext navigationParameterContext =
BeanProvider.getContextualReference(NavigationParameterContext.class);
for (Map.Entry<String, String> entry : navigationParameterContext.getPageParameters().entrySet())
{
//TODO add multi-value support
result.add(new RequestParameter(entry.getKey(), new String[]{entry.getValue()}));
}
return result;
}
/**
* Adds the current page-parameters to the given url
*
* @param externalContext current external-context
* @param url current url
* @param encodeValues flag which indicates if parameter values should be encoded or not
* @return url with request-parameters
*/
public static String addPageParameters(ExternalContext externalContext, String url, boolean encodeValues)
{
StringBuilder finalUrl = new StringBuilder(url);
boolean existingParameters = url.contains("?");
for (RequestParameter requestParam : getViewConfigPageParameters())
{
String key = requestParam.getKey();
for (String parameterValue : requestParam.getValues())
{
if (!url.contains(key + "=" + parameterValue) &&
!url.contains(key + "=" + encodeURLParameterValue(parameterValue, externalContext)))
{
if (!existingParameters)
{
finalUrl.append("?");
existingParameters = true;
}
else
{
finalUrl.append("&");
}
finalUrl.append(key);
finalUrl.append("=");
if (encodeValues)
{
finalUrl.append(JsfUtils.encodeURLParameterValue(parameterValue, externalContext));
}
else
{
finalUrl.append(parameterValue);
}
}
}
}
return finalUrl.toString();
}
/**
* Adds a paramter to the given url.
*
* @param externalContext current external-context
* @param url current url
* @param encodeValues flag which indicates if parameter values should be encoded or not
* @param name the paramter name
* @param value the paramter value
* @return url with appended parameter
*/
public static String addParameter(ExternalContext externalContext, String url, boolean encodeValues,
String name, String value)
{
// don't append if already available
if (url.contains(name + "=" + value)
|| url.contains(name + "=" + encodeURLParameterValue(value, externalContext)))
{
return url;
}
StringBuilder finalUrl = SharedStringBuilder.get(SB_ADD_PARAMETER);
finalUrl.append(url);
if (url.contains("?"))
{
finalUrl.append("&");
}
else
{
finalUrl.append("?");
}
finalUrl.append(name);
finalUrl.append("=");
if (encodeValues)
{
finalUrl.append(JsfUtils.encodeURLParameterValue(value, externalContext));
}
else
{
finalUrl.append(value);
}
return finalUrl.toString();
}
/**
* Adds the current request-parameters to the given url
*
* @param externalContext current external-context
* @param url current url
* @param encodeValues flag which indicates if parameter values should be encoded or not
* @return url with request-parameters
*/
public static String addRequestParameters(ExternalContext externalContext, String url, boolean encodeValues)
{
if (externalContext.getRequestParameterValuesMap().isEmpty())
{
return url;
}
StringBuilder finalUrl = new StringBuilder(url);
boolean existingParameters = url.contains("?");
for (Map.Entry<String, String[]> entry : externalContext.getRequestParameterValuesMap().entrySet())
{
for (String value : entry.getValue())
{
if (!url.contains(entry.getKey() + "=" + value) &&
!url.contains(entry.getKey() + "=" + encodeURLParameterValue(value, externalContext)))
{
if (!existingParameters)
{
finalUrl.append("?");
existingParameters = true;
}
else
{
finalUrl.append("&");
}
finalUrl.append(entry.getKey());
finalUrl.append("=");
if (encodeValues)
{
finalUrl.append(JsfUtils.encodeURLParameterValue(value, externalContext));
}
else
{
finalUrl.append(value);
}
}
}
}
return finalUrl.toString();
}
/**
* Encodes the given value using URLEncoder.encode() with the charset returned
* from ExternalContext.getResponseCharacterEncoding().
* This is exactly how the ExternalContext impl encodes URL parameter values.
*
* @param value value which should be encoded
* @param externalContext current external-context
* @return encoded value
*/
public static String encodeURLParameterValue(String value, ExternalContext externalContext)
{
// copied from MyFaces ServletExternalContextImpl.encodeURL()
try
{
return URLEncoder.encode(value, externalContext.getResponseCharacterEncoding());
}
catch (UnsupportedEncodingException e)
{
throw new UnsupportedOperationException("Encoding type="
+ externalContext.getResponseCharacterEncoding() + " not supported", e);
}
}
public static ViewConfigResolver getViewConfigResolver()
{
return BeanProvider.getContextualReference(ViewConfigResolver.class);
}
public static void saveFacesMessages(ExternalContext externalContext)
{
JsfModuleConfig jsfModuleConfig = BeanProvider.getContextualReference(JsfModuleConfig.class);
if (!jsfModuleConfig.isAlwaysKeepMessages())
{
return;
}
try
{
WindowMetaData windowMetaData = BeanProvider.getContextualReference(WindowMetaData.class);
Map<String, Object> requestMap = externalContext.getRequestMap();
@SuppressWarnings({ "unchecked" })
List<FacesMessageEntry> facesMessageEntryList =
(List<FacesMessageEntry>)requestMap.get(FacesMessageEntry.class.getName());
if (facesMessageEntryList == null)
{
facesMessageEntryList = new CopyOnWriteArrayList<FacesMessageEntry>();
}
windowMetaData.setFacesMessageEntryList(facesMessageEntryList);
}
catch (ContextNotActiveException e)
{
//TODO log it in case of project-stage development
//we can't handle it correctly -> delegate to the jsf-api (which has some restrictions esp. before v2.2)
FacesContext.getCurrentInstance().getExternalContext().getFlash().setKeepMessages(true);
}
}
public static void tryToRestoreMessages(FacesContext facesContext)
{
JsfModuleConfig jsfModuleConfig = BeanProvider.getContextualReference(JsfModuleConfig.class);
if (!jsfModuleConfig.isAlwaysKeepMessages())
{
return;
}
try
{
WindowMetaData windowMetaData = BeanProvider.getContextualReference(WindowMetaData.class);
@SuppressWarnings({ "unchecked" })
List<FacesMessageEntry> facesMessageEntryList = windowMetaData.getFacesMessageEntryList();
List<FacesMessage> originalMessageList = new ArrayList<FacesMessage>(facesContext.getMessageList());
if (facesMessageEntryList != null)
{
for (FacesMessageEntry messageEntry : facesMessageEntryList)
{
if (isNewMessage(originalMessageList, messageEntry.getFacesMessage()))
{
facesContext.addMessage(messageEntry.getComponentId(), messageEntry.getFacesMessage());
}
}
facesMessageEntryList.clear();
}
}
catch (ContextNotActiveException e)
{
//TODO discuss how we handle it
}
}
public static Throwable getRootCause(Throwable throwable)
{
while ((ELException.class.isInstance(throwable) || FacesException.class.isInstance(throwable) ||
InvocationTargetException.class.isInstance(throwable)) && throwable.getCause() != null)
{
throwable = throwable.getCause();
}
return throwable;
}
public static boolean isNewMessage(List<FacesMessage> facesMessages, FacesMessage messageToCheck)
{
for (FacesMessage facesMessage : facesMessages)
{
if ((facesMessage.getSummary() != null && facesMessage.getSummary().equals(messageToCheck.getSummary()) ||
facesMessage.getSummary() == null && messageToCheck.getSummary() == null) &&
(facesMessage.getDetail() != null && facesMessage.getDetail().equals(messageToCheck.getDetail()) ||
facesMessage.getDetail() == null && messageToCheck.getDetail() == null))
{
return false;
}
}
return true;
}
}