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Public API for the Apache MyFaces Trinidad project
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/*
* 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.myfaces.trinidad.util;
import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.el.ValueExpression;
import org.apache.myfaces.trinidad.logging.TrinidadLogger;
/**
* Factory class to return {@link FacesMessage} objects.
* @version $Name: $ ($Revision: adfrt/faces/adf-faces-api/src/main/java/oracle/adf/view/faces/util/MessageFactory.java#0 $) $Date: 30-nov-2005.11:48:33 $
*/
public final class MessageFactory
{
private MessageFactory()
{
}
/**
* Creates a FacesMessage for the given Throwable.
* The severity is {@link FacesMessage#SEVERITY_ERROR}
* @param error The root cause of this Exception will be used.
*/
public static FacesMessage getMessage(Throwable error)
{
_LOG.fine(error);
Throwable unwrap = ComponentUtils.unwrap(error);
String detail = unwrap.getLocalizedMessage();
if (detail == null)
{
// this is unusual. It is probably an unexpected RT error
// in the framework. log at warning level:
detail = unwrap.getClass().getName();
_LOG.warning(error);
}
// bug 4733165:
FacesMessage message =
new FacesMessage(FacesMessage.SEVERITY_ERROR, null, detail);
return message;
}
/**
* Creates a FacesMessage containing formatted text and
* a severity of SEVERITY_ERROR.
*
* @param context faces context
* @param messageId the bundle key for the translated string
* @param parameters parameters to be substituted in the placeholders
* of the translated string.
* @return a FacesMessage object
*/
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object[] parameters
)
{
return getMessage(context, FacesMessage.SEVERITY_ERROR,
messageId, parameters, null);
}
/**
* Creates a FacesMessage containing formatted text and
* a severity of SEVERITY_ERROR.
*
* @param context faces context
* @param messageId the bundle key for the translated string
* @param parameters parameters to be substituted in the placeholders
* of the translated string.
* @param component The component generating the message
* (allows label tracking)
* @return a FacesMessage object
*/
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object[] parameters,
UIComponent component
)
{
return _createFacesMessage(context, FacesMessage.SEVERITY_ERROR, messageId,
parameters, _getLabel(component));
}
/**
* Creates a FacesMessage containing formatted text and
* a severity of SEVERITY_ERROR.
*
* @param context faces context
* @param messageId the bundle key for the translated string
* @param parameters parameters to be substituted in the placeholders
* of the translated string.
* @param label The label of the component generating the message
* @return a FacesMessage object
*/
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object[] parameters,
Object label
)
{
return _createFacesMessage(context, FacesMessage.SEVERITY_ERROR, messageId,
parameters, label);
}
/**
* Creates a FacesMessage containing formatted text.
*
* @param context faces context
* @param severity the message severity
* @param messageId the bundle key for the translated string
* @param parameters parameters to be substituted in the placeholders
* of the translated string.
* @return a FacesMessage object
*/
public static FacesMessage getMessage(
FacesContext context,
FacesMessage.Severity severity,
String messageId,
Object[] parameters
)
{
return getMessage(context, severity,
messageId, parameters, null);
}
/**
* Creates a FacesMessage containing formatted text.
*
* @param context faces context
* @param severity the message severity
* @param messageId the bundle key for the translated string
* @param parameters parameters to be substituted in the placeholders
* of the translated string.
* @param component The component generating the message
* (allows label tracking)
* @return a FacesMessage object
*/
public static FacesMessage getMessage(
FacesContext context,
FacesMessage.Severity severity,
String messageId,
Object[] parameters,
UIComponent component
)
{
return _createFacesMessage(context, severity, messageId,
parameters, _getLabel(component));
}
/**
* Creates a FacesMessage without any parameters, and
* a severity of SEVERITY_ERROR.
*
* @param context faces context
* @param messageId the bundle key for the translated string
* @return a FacesMessage object
*/
public static FacesMessage getMessage(
FacesContext context,
String messageId
)
{
return getMessage(context, messageId, (Object[]) null, (UIComponent) null);
}
/**
* Returns the localized string
* @param context
* @param messageId
* @return String
*/
public static String getString(
FacesContext context,
String messageId
)
{
return LocaleUtils.__getSummaryString(context, messageId);
}
/**
* Creates a FacesMessage without any parameters, and
* a severity of SEVERITY_ERROR.
*
* @param context faces context
* @param messageId the bundle key for the translated string
* @param component The component generating the message
* (allows label tracking)
* @return a FacesMessage object
*/
public static FacesMessage getMessage(
FacesContext context,
String messageId,
UIComponent component
)
{
return getMessage(context, messageId, (Object[]) null, component);
}
/**
* Creates a FacesMessage using a single parameter.
*
* @param context faces context
* @param messageId the bundle key for the translated string
* @param parameter parameter to be substituted for "{0}"
* @param label the label of the creating component
* @return a FacesMessage object
*/
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object parameter,
Object label
)
{
return getMessage(context, messageId, new Object[]{parameter}, label);
}
/**
* Creates a FacesMessage using a single parameter.
*
* @param context faces context
* @param messageId the bundle key for the translated string
* @param parameter parameter to be substituted for "{0}"
* @return a FacesMessage object
*/
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object parameter
)
{
return getMessage(context, messageId, new Object[]{parameter});
}
/**
* Gets the translation summary and detail text from the message bundle.
* If customMessagePattern is set, then it is used as the
* detail part of the faces message. The summary and detail string are
* formatted based on the supplied parameters. Returns a
* FacesMessage using the formatted summary and detail message with
* severity set to error.
*
* @param context faces context
* @param messageId the bundle key for the translated string
* @param customMessagePattern Custom error message. It can also contain
* placeholders which will be formatted with the supplied parameters.
* This customizes the detail part of the {@link FacesMessage}.
* If value is null. Then picksup translation summary and detail from
* the bundle, which is then formatted and used in construction of faces
* message.
* @param parameters parameters to be substituted in the placeholders
* of the translated string.
* @return a FacesMessage object
*/
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object customMessagePattern,
Object[] parameters)
{
return getMessage(context, messageId, customMessagePattern,
parameters, null);
}
/**
* Gets the translation summary and detail text from the message bundle.
* If customMessagePattern is set, then it is used as the
* detail part of the faces message. The summary and detail string are
* formatted based on the supplied parameters. Returns a
* FacesMessage using the formatted summary and detail message with
* severity set to error.
*
* @param context faces context
* @param messageId the bundle key for the translated string
* @param customMessagePattern Custom error message. It can also contain
* placeholders which will be formatted with the supplied parameters.
* This customizes the detail part of the {@link FacesMessage}.
* If value is null. Then picksup translation summary and detail from
* the bundle, which is then formatted and used in construction of faces
* message.
* @param parameters parameters to be substituted in the placeholders
* of the translated string.
* @param component The component generating the message
* (allows label tracking)
* @return a FacesMessage object
*/
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object customMessagePattern,
Object[] parameters,
UIComponent component)
{
return getMessage(context, messageId, customMessagePattern,
parameters, _getLabel(component));
}
/**
* Gets the translation summary and detail text from the message bundle.
* If customMessagePattern is set, then it is used as the
* detail part of the faces message. The summary and detail string are
* formatted based on the supplied parameters. Returns a
* FacesMessage using the formatted summary and detail message with
* severity set to error.
*
* @param context faces context
* @param messageId the bundle key for the translated string
* @param customMessagePattern Custom error message. It can also contain
* placeholders which will be formatted with the supplied parameters.
* This customizes the detail part of the {@link FacesMessage}.
* If value is null. Then picksup translation summary and detail from
* the bundle, which is then formatted and used in construction of faces
* message.
* @param parameters parameters to be substituted in the placeholders
* of the translated string.
* @param label the label of the creating component
* @return a FacesMessage object
*/
public static FacesMessage getMessage(
FacesContext context,
String messageId,
Object customMessagePattern,
Object[] parameters,
Object label)
{
if (null != customMessagePattern)
{
String summary = LocaleUtils.__getSummaryString(context, messageId);
ErrorMessages msgs = _getErrorMessage(summary, customMessagePattern,
parameters);
return _createFacesMessage(FacesMessage.SEVERITY_ERROR, msgs, label);
}
return _createFacesMessage(context, FacesMessage.SEVERITY_ERROR, messageId,
parameters, label);
}
private static FacesMessage _createFacesMessage(
FacesContext context,
FacesMessage.Severity severity,
String messageId,
Object[] parameters,
Object label
)
{
ErrorMessages errMsgs
= LocaleUtils.__getErrorMessages(context, messageId);
ErrorMessages formattedErrMsgs
= _getBindingOrFormattedErrorMessages(errMsgs, parameters);
return _createFacesMessage(severity, formattedErrMsgs, label);
}
// private static FacesMessage _createFacesMessage(
// FacesMessage.Severity severity,
// ErrorMessages messageStrings,
// UIComponent component
// )
// {
// return _createFacesMessage(severity, messageStrings, _getLabel(component));
// }
private static FacesMessage _createFacesMessage(
FacesMessage.Severity severity,
ErrorMessages messageStrings,
Object label
)
{
if (messageStrings instanceof BindingErrorMessages)
{
return new BindingFacesMessage(severity, messageStrings, label);
}
String summary = messageStrings.getMessage();
String detail = messageStrings.getDetailMessage();
return new LabeledFacesMessage(severity, summary, detail, label);
}
private static Object[] _getProcessedBindings(
FacesContext facesContext,
Object[] parameters)
{
FacesContext context = facesContext;
Object[] resolvedParameters = new Object[parameters.length];
for (int i = 0; i < parameters.length; i++)
{
Object o = parameters[i];
if (o instanceof ValueExpression)
{
if (context == null)
context = FacesContext.getCurrentInstance();
o = ((ValueExpression) o).getValue(context.getELContext());
}
resolvedParameters[i] = o;
}
return resolvedParameters;
}
private static String _getFormattedString(String pattern, Object parameters[])
{
if (parameters == null)
return pattern;
FastMessageFormat formatter = new FastMessageFormat(pattern);
String fmtedMsgStr = formatter.format(parameters);
return fmtedMsgStr;
}
private static boolean _containsBinding(Object[] parameters)
{
if (parameters == null)
return false;
for (int i = 0; i < parameters.length; i++)
{
if (parameters[i] instanceof ValueExpression)
return true;
}
return false;
}
//A Factory
private static ErrorMessages _getErrorMessage(
String summary,
Object customMessagePattern,
Object[] parameters)
{
_assertIsValidCustomMessageType(customMessagePattern);
boolean isCustomMsgValueBound = (customMessagePattern instanceof ValueExpression);
boolean containsBinding = _containsBinding(parameters);
if (isCustomMsgValueBound || containsBinding)
{
if (!(isCustomMsgValueBound))
{
String customMesg = (String)customMessagePattern;
return new BindingErrorMessages(summary, customMesg, parameters);
}
else
{
ValueExpression customMessage = (ValueExpression)customMessagePattern;
return new CustomDetailErrorMessage(summary, customMessage,
parameters, containsBinding);
}
}
else
{
String detailMsgPattern = (String)customMessagePattern;
ErrorMessages errorMsg = new FormattedErrorMessages(summary,
detailMsgPattern,
parameters);
return errorMsg;
}
}
private static Object _getLabel(UIComponent component)
{
Object o = null;
if (component != null)
{
o = component.getAttributes().get("label");
if (o == null)
o = component.getValueExpression ("label");
}
return o;
}
private static void _assertIsValidCustomMessageType(Object customMessagePattern)
{
if (!(customMessagePattern instanceof ValueExpression ||
customMessagePattern instanceof String))
throw new IllegalArgumentException(_LOG.getMessage(
"CUSTOM_MESSAGE_SHOULD_BE_VALUEBINDING_OR_STRING_TYPE"));
}
private static ErrorMessages _getBindingOrFormattedErrorMessages(
ErrorMessages unFormattedErrorMessages,
Object[] parameters)
{
if (!_containsBinding(parameters))
return new FormattedErrorMessages(unFormattedErrorMessages.getMessage(),
unFormattedErrorMessages.getDetailMessage(),
parameters);
else
return new BindingErrorMessages(unFormattedErrorMessages.getMessage(),
unFormattedErrorMessages.getDetailMessage(),
parameters);
}
private static class BindingFacesMessage extends LabeledFacesMessage
{
public BindingFacesMessage(FacesMessage.Severity severity,
ErrorMessages messageStrings,
Object label)
{
super(severity, null, null, label);
_messageStrings = messageStrings;
}
@Override
public String getDetail()
{
return _messageStrings.getDetailMessage();
}
@Override
public String getSummary()
{
return _messageStrings.getMessage();
}
public void setDetail()
{
throw new UnsupportedOperationException();
}
public void setSummary()
{
throw new UnsupportedOperationException();
}
private final ErrorMessages _messageStrings;
private static final long serialVersionUID = 1L;
}
private static class BindingErrorMessages extends ErrorMessages
{
BindingErrorMessages(
String messageFormat, String detailMessageFormat, Object[] parameters)
{
super(messageFormat, detailMessageFormat);
_parameters = parameters;
if (parameters == null)
throw new NullPointerException();
}
@Override
public String getMessage()
{
String pattern = super.getMessage();
return _getFormattedString(pattern, getResolvedParameters());
}
@Override
public String getDetailMessage()
{
String pattern = super.getDetailMessage();
return _getFormattedString(pattern, getResolvedParameters());
}
protected final Object[] getResolvedParameters()
{
return _getProcessedBindings(null, _parameters);
}
protected final Object[] getParameters()
{
return _parameters;
}
private Object[] _parameters;
private static final long serialVersionUID = 1L;
}
// Though it may not be exactly correct to extend BindingErrorMessages
// as parameters might not have value binding. This inheritance keeps
// it simple.
private static class CustomDetailErrorMessage extends BindingErrorMessages
{
CustomDetailErrorMessage(
String messageFormat,
ValueExpression customDetailErrorMessage,
Object[] parameters,
boolean hasBoundParameters
)
{
super(messageFormat, null, parameters);
_customDetailErrorMessage = customDetailErrorMessage;
_hasBoundParameters = hasBoundParameters;
}
// Currently only detail message can be customized. So we override the
// detail message. If summary is to be overridden we have to do the
// same to it also.
@Override
public String getDetailMessage()
{
FacesContext context = FacesContext.getCurrentInstance();
String detailMsgPattern = (String)_customDetailErrorMessage.getValue(context.getELContext());
if(detailMsgPattern == null)
{
// Set a default message that might get used by FacesException
// constructor for example. This will often happen because
// ValidatorException constructor will call this method to
// get the exception message for its parent. So by default
// we'll use the EL String.
// Note that by default
detailMsgPattern = _customDetailErrorMessage.getExpressionString();
// Since that string will get parsed by FastMessageFormat, the { }
// of the EL must be escaped
//detailMsgPattern = '\'' + detailMsgPattern + '\'';
// No need to format this string, just return it here.
return detailMsgPattern;
}
Object[] params = super.getParameters();
if (_hasBoundParameters)
params = getResolvedParameters();
return _getFormattedString(detailMsgPattern, params);
}
private ValueExpression _customDetailErrorMessage;
private boolean _hasBoundParameters;
private static final long serialVersionUID = 1L;
}
private static class FormattedErrorMessages extends ErrorMessages
{
FormattedErrorMessages(String summary, String detail, Object[] parameters)
{
super(summary, detail);
_parameters = parameters;
}
@Override
public String getMessage()
{
return _getFormattedString(super.getMessage(), _parameters);
}
@Override
public String getDetailMessage()
{
return _getFormattedString(super.getDetailMessage(), _parameters);
}
Object[] _parameters;
private static final long serialVersionUID = 1L;
}
private static final TrinidadLogger _LOG = TrinidadLogger.createTrinidadLogger(MessageFactory.class);
}