Hi,
In my code I use a small utility class to do something like
org.apache.velocity.app.Velocity.evaluate()
but without parsing the template String every time I want to
render the template.
This class - appended to this message - is a simplification
from my code, was not tested and was made for a older
version of Velocity.
So, the questions are:
- Is someone interested on this little thing?
- Am I using the right classes, i.e.: should I really use
org.apache.velocity.runtime.RuntimeInstance
or should I use something else?
If you are interested, I will fix it according to the experts
remarks, test it and post it.
Have fun,
Paulo Gaspar
http://www.krankikom.de
http://www.ruhronline.de
import java.io.Writer;
import java.io.StringReader;
import java.io.Reader;
import java.io.StringWriter;
import org.apache.velocity.context.Context;
import org.apache.velocity.context.InternalContextAdapterImpl;
import org.apache.velocity.runtime.RuntimeInstance;
import org.apache.velocity.runtime.parser.node.SimpleNode;
import org.apache.velocity.runtime.parser.ParseException;
class StaticTemplate
{ private RuntimeInstance m_runtimeInstance;
private SimpleNode m_nodeTree = null;
private String m_logTag;
protected StaticTemplate(RuntimeInstance i_runtimeInstance, String
i_logTag, Reader i_reader)
throws ParseException
{ super();
m_logTag = i_logTag;
m_runtimeInstance = i_runtimeInstance;
m_nodeTree = m_runtimeInstance.parse(i_reader, m_logTag);
}
protected StaticTemplate( RuntimeInstance i_runtimeInstance,
String i_logTag, String i_templateText
)
throws ParseException
{ this(i_runtimeInstance, i_logTag, new StringReader(i_templateText));
}
private void render(Writer o_writer, Context i_ctx)
throws Exception
{ InternalContextAdapterImpl ica = new
InternalContextAdapterImpl(i_ctx);
ica.pushCurrentTemplateName(m_logTag);
m_nodeTree.init(ica, m_runtimeInstance);
try
{ m_nodeTree.render(ica, o_writer);
}
finally
{ ica.popCurrentTemplateName();
}
}
public String render(Context i_ctx)
throws Exception
{ Writer wrt = new StringWriter();
render(wrt, i_ctx);
return wrt.toString();
}
}
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