/*
* Copyright (c) 2003 The Visigoth Software Society. 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 acknowledgement:
* "This product includes software developed by the
* Visigoth Software Society (http://www.visigoths.org/)."
* Alternately, this acknowledgement may appear in the software itself,
* if and wherever such third-party acknowledgements normally appear.
*
* 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
* project contributors may be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [email protected].
*
* 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
* nor may "FreeMarker" or "Visigoth" appear in their names
* without prior written permission of the Visigoth Software Society.
*
* 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 VISIGOTH SOFTWARE SOCIETY 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 Visigoth Software Society. For more
* information on the Visigoth Software Society, please see
* http://www.visigoths.org/
*/
package freemarker.template;
import java.io.Writer;
import java.io.PrintWriter;
import freemarker.core.Environment;
/**
* An API for objects that handle exceptions that are thrown during
* template rendering.
* @author <a href="mailto:[email protected]">Jonathan Revusky</a>
*/
public interface TemplateExceptionHandler {
/**
* handle the exception.
* @param te the exception that occurred.
* @param env The environment object that represents the rendering context
* @param out the character output stream to output to.
*/
void handleTemplateException(TemplateException te, Environment env, Writer out)
throws TemplateException;
/**
* This is a TemplateExceptionHandler which simply skips errors. It does nothing
* to handle the event. Note that the exception is still logged in any case, before
* being passed to the handler.
*/
TemplateExceptionHandler IGNORE_HANDLER = new TemplateExceptionHandler() {
public void handleTemplateException(TemplateException te, Environment env, Writer out) {
}
};
/**
* This is a TemplateExceptionHandler that simply rethrows the exception.
* Note that the exception is logged before being rethrown.
*/
TemplateExceptionHandler RETHROW_HANDLER =new TemplateExceptionHandler() {
public void handleTemplateException(TemplateException te, Environment env, Writer out)
throws TemplateException
{
throw te;
}
};
/**
* This is a TemplateExceptionHandler used when you develop the templates. This handler
* outputs the stack trace information to the client and then rethrows the exception.
*/
TemplateExceptionHandler DEBUG_HANDLER =new TemplateExceptionHandler() {
public void handleTemplateException(TemplateException te, Environment env, Writer out)
throws TemplateException
{
PrintWriter pw = (out instanceof PrintWriter)
? (PrintWriter) out
: new PrintWriter(out);
te.printStackTrace(pw);
pw.flush();
throw te;
}
};
/**
* This is a TemplateExceptionHandler used when you develop HTML templates. This handler
* outputs the stack trace information to the client and then rethrows the exception, and
* surrounds it with tags to make the error message readable with the browser.
*/
TemplateExceptionHandler HTML_DEBUG_HANDLER =new TemplateExceptionHandler() {
public void handleTemplateException(TemplateException te, Environment env, Writer out)
throws TemplateException
{
PrintWriter pw = (out instanceof PrintWriter)
? (PrintWriter) out
: new PrintWriter(out);
pw.println("<!-- FREEMARKER ERROR MESSAGE STARTS HERE -->"
+ "<script language=javascript>//\"></script>"
+ "<script language=javascript>//\'></script>"
+ "<script language=javascript>//\"></script>"
+ "<script language=javascript>//\'></script>"
+ "</title></xmp></script></noscript></style></object>"
+ "</head></pre></table>"
+ "</form></table></table></table></a></u></i></b>"
+ "<div align=left "
+ "style='background-color:#FFFF00; color:#FF0000; "
+ "display:block; border-top:double; padding:2pt; "
+ "font-size:medium; font-family:Arial,sans-serif; "
+ "font-style: normal; font-variant: normal; "
+ "font-weight: normal; text-decoration: none; "
+ "text-transform: none'>"
+ "<b style='font-size:medium'>FreeMarker template error!</b>"
+ "<pre><xmp>");
te.printStackTrace(pw);
pw.println("</xmp></pre></div></html>");
pw.flush();
throw te;
}
};
}
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