org.apache.myfaces.shared_tomahawk.util.ParametrizableFacesMessage Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of tomahawk21 Show documentation
JSF components and utilities that can be used with any JSF implementation. This library is based on the JSF1.1 version of Tomahawk, but with minor source code and build changes to take advantage of JSF2.1 features. A JSF2.1 implementation is required to use this version of the Tomahawk library.
The newest version!
/*
 * 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.shared_tomahawk.util;

import java.text.MessageFormat;
import java.util.Locale;

import javax.el.ValueExpression;
import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;

/** 
 * This class encapsulates a FacesMessage to evaluate the label
 * expression on render response, where f:loadBundle is available
 * 
 * @author Leonardo Uribe (latest modification by $Author: lu4242 $)
 * @version $Revision: 1305679 $ $Date: 2012-03-26 18:42:04 -0500 (Mon, 26 Mar 2012) $
 */
public class ParametrizableFacesMessage extends FacesMessage
{
    /**
     * 
     */
    private static final long serialVersionUID = 7792947730961657948L;

    private final Object _args[];
    private String _evaluatedDetail;
    private String _evaluatedSummary;
    private transient Object _evaluatedArgs[];
    private Locale _locale;

    public ParametrizableFacesMessage(
            String summary, String detail, Object[] args, Locale locale)
    {
        super(summary, detail);
        if(locale == null)
        {
            throw new NullPointerException("locale");
        }
        _locale = locale;
        _args = args;
    }

    public ParametrizableFacesMessage(FacesMessage.Severity severity,
            String summary, String detail, Object[] args, Locale locale)
    {
        super(severity, summary, detail);
        if(locale == null)
        {
            throw new NullPointerException("locale");
        }
        _locale = locale;
        _args = args;
    }

    @Override
    public String getDetail()
    {
        if (_evaluatedArgs == null && _args != null)
        {
            evaluateArgs();
        }
        if (_evaluatedDetail == null)
        {
            MessageFormat format = new MessageFormat(super.getDetail(), _locale);
            _evaluatedDetail = format.format(_evaluatedArgs);
        }
        return _evaluatedDetail;
    }

    @Override
    public void setDetail(String detail)
    {
        super.setDetail(detail);
        _evaluatedDetail = null;
    }
    
    public String getUnformattedDetail()
    {
        return super.getDetail();
    }

    @Override
    public String getSummary()
    {
        if (_evaluatedArgs == null && _args != null)
        {
            evaluateArgs();
        }
        if (_evaluatedSummary == null)
        {
            MessageFormat format = new MessageFormat(super.getSummary(), _locale);
            _evaluatedSummary = format.format(_evaluatedArgs);
        }
        return _evaluatedSummary;
    }

    @Override
    public void setSummary(String summary)
    {
        super.setSummary(summary);
        _evaluatedSummary = null;
    }
    
    public String getUnformattedSummary()
    {
        return super.getSummary();
    }

    private void evaluateArgs()
    {
        _evaluatedArgs = new Object[_args.length];
        FacesContext facesContext = null;
        for (int i = 0; i < _args.length; i++)
        {
            if (_args[i] == null)
            {
                continue;
            }
            else if (_args[i] instanceof ValueBinding)
            {
                if (facesContext == null)
                {
                    facesContext = FacesContext.getCurrentInstance();
                }
                _evaluatedArgs[i] = ((ValueBinding)_args[i]).getValue(facesContext);
            }
            else if (_args[i] instanceof ValueExpression)
            {
                if (facesContext == null)
                {
                    facesContext = FacesContext.getCurrentInstance();
                }
                _evaluatedArgs[i] = ((ValueExpression)_args[i]).getValue(facesContext.getELContext());
            }
            else 
            {
                _evaluatedArgs[i] = _args[i];
            }
        }
    }
}