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/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2000 Blacksmith, Inc.
This library 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 library 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 library; if not, see http://www.gnu.org
*/
package net.wotonomy.web;
import java.text.Format;
import net.wotonomy.foundation.NSDictionary;
import net.wotonomy.foundation.NSNumberFormatter;
import net.wotonomy.foundation.NSTimestampFormatter;
/**
* WOString renders a dynamically generated string in the output.
* Bindings are:
* <ul>
* <li>value: a property returning a value which will be rendered as the
* output. If a formatter is not used, then the value must be convertable
* to a String with toString().</li>
* <li>escapeHTML: a property returning a value convertable to a Boolean
* indicating whether the any html characters in the output should be
* escaped so they are shown as html characters rather than interpreted
* as html.</li>
* <li>formatter: a property returning a Format object that will be
* used to format the value into a String.</li>
* <li>dateformat: a property returning a DateFormat object that will be
* used to format the value into a String.</li>
* <li>numberformat: a property returning a NumberFormat object that will be
* used to format the value into a String. Not yet implemented.</li>
* <li>valueWhenEmpty: a property returning a String that will be used
* in place of an empty or null value. Not yet implemented.</li>
* </ul>
*
* @author michael@mpowers.net
* @author $Author: cgruber $
* @version $Revision: 905 $
*/
public class WOString extends WODynamicElement
{
protected Object value;
protected boolean escapeHTML;
protected Format formatter;
protected String dateformat;
protected String numberformat;
protected Object valueWhenEmpty;
/**
* The default constructor.
*/
protected WOString ()
{
}
public WOString (
String aName, NSDictionary anAssociationMap, WOElement aRootElement)
{
super( aName, anAssociationMap, aRootElement );
escapeHTML = true;
}
public void appendToResponse (WOResponse aResponse, WOContext aContext)
{
WOComponent c = aContext.component();
numberformat = stringForProperty("numberformat", c );
dateformat = stringForProperty("dateformat", c );
formatter = (Format) valueForProperty("formatter", c );
escapeHTML = booleanForProperty("escapeHTML", c );
value = valueForProperty("value", c );
valueWhenEmpty = valueForProperty("valueWhenEmpty", c );
Object result = value;
if ( result != null )
{
if ( formatter != null )
{
try
{
result = formatter.format( result );
}
catch ( IllegalArgumentException exc )
{
}
}
if ( dateformat != null )
{
try
{
result = new NSTimestampFormatter( dateformat ).format( result );
}
catch ( IllegalArgumentException exc )
{
}
}
if ( numberformat != null )
{
try
{
result = new NSNumberFormatter( numberformat ).format( result );
}
catch ( IllegalArgumentException exc )
{
}
}
}
if ( result == null )
{
result = valueWhenEmpty;
if ( result == null )
{
result = "nil";
}
}
if ( escapeHTML )
{
aResponse.appendContentHTMLString( result.toString() );
}
else
{
aResponse.appendContentString( result.toString() );
}
}
}
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