I was trying to implement TextArea form type as mentioned in Activiti in Action book. I have placed my jar file under webapps\activiti-explorer\WEB-INF\lib and have restarted tomcat. I then realized that AbstractFormType class is missing in Activiti-engine-5.14.jar.
When I look at an older version of jar like Activiti-engine-5.4.jar, its present there.
Yes you were right. I have downloaded the example from book-webapp-explorer. In the source code, I could see that it was imported from org.activiti.engine.impl.form.AbstractFormType but now its available at org.activiti.engine.form.AbstractFormType