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/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Velocity", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import java.io.StringWriter;
import java.util.Properties;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.exception.ParseErrorException;
import org.apache.velocity.exception.MethodInvocationException;
/**
* This class is a simple demonstration of how the Velocity Template Engine
* can be used in a standalone application using the Velocity utility class.
*
* It demonstrates two of the 'helper' methods found in the org.apache.velocity.util.Velocity
* class, mergeTemplate() and evaluate().
*
*
* @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
* @version $Id: Example2.java,v 1.3 2001/03/20 18:03:10 geirm Exp $
*/
public class Example2
{
public static void main( String args[] )
{
/* first, we init the runtime engine. Defaults are fine. */
try
{
Velocity.init();
}
catch(Exception e)
{
System.out.println("Problem initializing Velocity : " + e );
return;
}
/* lets make a Context and put data into it */
VelocityContext context = new VelocityContext();
context.put("name", "Velocity");
context.put("project", "Jakarta");
/* lets render a template */
StringWriter w = new StringWriter();
try
{
Velocity.mergeTemplate("example2.vm", context, w );
}
catch (Exception e )
{
System.out.println("Problem merging template : " + e );
}
System.out.println(" template : " + w );
/*
* lets dynamically 'create' our template
* and use the evaluate() method to render it
*/
String s = "We are using $project $name to render this.";
w = new StringWriter();
try
{
Velocity.evaluate( context, w, "mystring", s );
}
catch( ParseErrorException pee )
{
/*
* thrown if something is wrong with the
* syntax of our template string
*/
System.out.println("ParseErrorException : " + pee );
}
catch( MethodInvocationException mee )
{
/*
* thrown if a method of a reference
* called by the template
* throws an exception. That won't happen here
* as we aren't calling any methods in this
* example, but we have to catch them anyway
*/
System.out.println("MethodInvocationException : " + mee );
}
catch( Exception e )
{
System.out.println("Exception : " + e );
}
System.out.println(" string : " + w );
}
}
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