From the forum: http://forums.opensymphony.com/thread.jspa?threadID=22588&tstart=0

Hi

I have comitted DatePickerTagTest that has a test for the singleClick boolean field.
tag.setSingleClick("true");

Will result in a Freemarker template engine error.

22:58:44,609 ERROR [freemarker.runtime]
Error on line 21, column 31 in template/simple/datepicker.ftl
Expecting a string, date or number here, Expression parameters.singleclick is instead a freemarker.ext.beans.BooleanModel
The problematic instruction:
----------
==> ${parameters.singleclick} [on line 21, column 29 in template/simple/datepicker.ftl]
in include "/${parameters.templateDir}/simple/datepicker.ftl" [on line 2, column 1 in template/xhtml/datepicker.ftl]
----------

Java backtrace for programmers:
----------
freemarker.core.NonStringException: Error on line 21, column 31 in template/simple/datepicker.ftl
Expecting a string, date or number here, Expression parameters.singleclick is instead a freemarker.ext.beans.BooleanModel
at freemarker.core.Expression.getStringValue(Expression.java:126)
at freemarker.core.Expression.getStringValue(Expression.java:93)
at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.Environment.include(Environment.java:1375)
at freemarker.core.Include.accept(Include.java:155)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.Environment.process(Environment.java:176)
at freemarker.template.Template.process(Template.java:231)
at com.opensymphony.webwork.components.template.FreemarkerTemplateEngine.renderTem plate(FreemarkerTemplateEngine.java:124)
at com.opensymphony.webwork.components.UIBean.mergeTemplate(UIBean.java:630)
at com.opensymphony.webwork.components.UIBean.end(UIBean.java:584)
at com.opensymphony.webwork.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSup port.java:21)
at com.opensymphony.webwork.views.jsp.ui.DatePickerTagTest.testSingleclick(DatePic kerTagTest.java:53)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.ja va:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at junit.textui.TestRunner.doRun(TestRunner.java:116)
at com.intellij.rt.execution.junit2.IdeaJUnitAgent.doRun(IdeaJUnitAgent.java:58)
at junit.textui.TestRunner.start(TestRunner.java:172)
at com.intellij.rt.execution.junit.TextTestRunner2.startRunnerWithArgs(TextTestRun ner2.java:23)
at com.intellij.rt.execution.junit2.JUnitStarter.prepareStreamsAndStart(JUnitStart er.java:98)
at com.intellij.rt.execution.junit2.JUnitStarter.main(JUnitStarter.java:32)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.ja va:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:90)