parameter evaluation during compilation
---------------------------------------
Key: TAPESTRY-2462
URL: https://issues.apache.org/jira/browse/TAPESTRY-2462
Project: Tapestry
Issue Type: Bug
Components: tapestry-core
Affects Versions: 4.1.5
Reporter: Pieter Schoenmakers
When the HiveMindExpressionCompiler.generateGetter does its thing to:
<binding name="condition" value="prop == null || !(prop.length () ==
0)"/>
a NullPointerException is shown in the console output, see below. Removing the
! from the expression solves the problem. I expect the problem to be in
ognl.BooleanExpression.toGetSourceString(), but I do not have enough Tapestry
experience to fix it myself.
The problem is not that there is console output, however undesirable that is.
The problem is that code is evaluated during compilation.
java.lang.NullPointerException: target is null for method length
at ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1327)
at ognl.ASTMethod.getValueBody(ASTMethod.java:90)
at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
at ognl.SimpleNode.getValue(SimpleNode.java:258)
at ognl.ASTChain.getValueBody(ASTChain.java:138)
at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
at ognl.SimpleNode.getValue(SimpleNode.java:258)
at ognl.ASTEq.getValueBody(ASTEq.java:50)
at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
at ognl.SimpleNode.getValue(SimpleNode.java:258)
at ognl.ASTNot.getValueBody(ASTNot.java:49)
at ognl.BooleanExpression.toGetSourceString(BooleanExpression.java:41)
at ognl.ASTNot.toGetSourceString(ASTNot.java:61)
at ognl.OgnlRuntime.getChildSource(OgnlRuntime.java:2711)
at ognl.OgnlRuntime.getChildSource(OgnlRuntime.java:2670)
at ognl.ASTOr.toGetSourceString(ASTOr.java:104)
at
org.apache.tapestry.services.impl.HiveMindExpressionCompiler.generateGetter(HiveMindExpressionCompiler.java:309)
at
org.apache.tapestry.services.impl.HiveMindExpressionCompiler.compileExpression(HiveMindExpressionCompiler.java:152)
at ognl.OgnlRuntime.compileExpression(OgnlRuntime.java:414)
at ognl.Ognl.compileExpression(Ognl.java:141)
at
org.apache.tapestry.services.impl.ExpressionCacheImpl.parse(ExpressionCacheImpl.java:152)
at
org.apache.tapestry.services.impl.ExpressionCacheImpl.getCompiledExpression(ExpressionCacheImpl.java:115)
at
$ExpressionCache_11a9687fd44.getCompiledExpression($ExpressionCache_11a9687fd44.java)
at
org.apache.tapestry.binding.ExpressionBinding.resolveExpression(ExpressionBinding.java:134)
at
org.apache.tapestry.binding.ExpressionBinding.getObject(ExpressionBinding.java:125)
at
org.apache.tapestry.binding.AbstractBinding.getObject(AbstractBinding.java:84)
at
org.apache.tapestry.enhance.EnhanceUtils.toBoolean(EnhanceUtils.java:173)
at $Conditional_244.getCondition($Conditional_244.java)
at
org.apache.tapestry.components.Conditional.evaluateCondition(Conditional.java:60)
at
org.apache.tapestry.components.Conditional.renderComponent(Conditional.java:39)
at
org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:724)
at
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:187)
at
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:538)
at org.apache.tapestry.html.Shell.renderComponent(Shell.java:125)
at
org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:724)
at
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:187)
at
org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:107)
at
org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:724)
at
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:185)
at org.apache.tapestry.AbstractPage.renderPage(AbstractPage.java:249)
at
org.apache.tapestry.engine.RequestCycle.renderPage(RequestCycle.java:400)
at
org.apache.tapestry.services.impl.DefaultResponseBuilder.renderResponse(DefaultResponseBuilder.java:159)
at
org.apache.tapestry.services.impl.ResponseRendererImpl.renderResponse(ResponseRendererImpl.java:33)
at
$ResponseRenderer_11a9687fc23.renderResponse($ResponseRenderer_11a9687fc23.java)
at org.apache.tapestry.engine.PageService.service(PageService.java:68)
at $IEngineService_11a9687fc90.service($IEngineService_11a9687fc90.java)
at
org.apache.tapestry.services.impl.EngineServiceOuterProxy.service(EngineServiceOuterProxy.java:72)
at
org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:241)
at nl.adp.bs.apollo.tapestry.Engine.service(Engine.java:27)
at
org.apache.tapestry.services.impl.InvokeEngineTerminator.service(InvokeEngineTerminator.java:54)
at
$WebRequestServicer_11a9687fc6d.service($WebRequestServicer_11a9687fc6d.java)
at
org.apache.tapestry.services.impl.DisableCachingFilter.service(DisableCachingFilter.java:54)
at
$WebRequestServicerFilter_11a9687fc6f.service($WebRequestServicerFilter_11a9687fc6f.java)
at
$WebRequestServicer_11a9687fc71.service($WebRequestServicer_11a9687fc71.java)
at
$WebRequestServicer_11a9687fc69.service($WebRequestServicer_11a9687fc69.java)
at
org.apache.tapestry.services.impl.WebRequestServicerPipelineBridge.service(WebRequestServicerPipelineBridge.java:61)
at
$ServletRequestServicer_11a9687fc4f.service($ServletRequestServicer_11a9687fc4f.java)
at
org.apache.tapestry.request.DecodedRequestInjector.service(DecodedRequestInjector.java:55)
at
$ServletRequestServicerFilter_11a9687fc4b.service($ServletRequestServicerFilter_11a9687fc4b.java)
at
$ServletRequestServicer_11a9687fc51.service($ServletRequestServicer_11a9687fc51.java)
at
org.apache.tapestry.multipart.MultipartDecoderFilter.service(MultipartDecoderFilter.java:52)
at
$ServletRequestServicerFilter_11a9687fc49.service($ServletRequestServicerFilter_11a9687fc49.java)
at
$ServletRequestServicer_11a9687fc51.service($ServletRequestServicer_11a9687fc51.java)
at
org.apache.tapestry.services.impl.SetupRequestEncoding.service(SetupRequestEncoding.java:53)
at
$ServletRequestServicerFilter_11a9687fc4d.service($ServletRequestServicerFilter_11a9687fc4d.java)
at
$ServletRequestServicer_11a9687fc51.service($ServletRequestServicer_11a9687fc51.java)
at
$ServletRequestServicer_11a9687fc43.service($ServletRequestServicer_11a9687fc43.java)
at
org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:126)
at
org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:103)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:106)
at nl.emma.logging.LogFilter.doFilter(LogFilter.java:46)
at
com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70)
at
com.caucho.server.security.SecurityFilterChain.doFilter(SecurityFilterChain.java:135)
at
com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:209)
at
com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:173)
at
com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
at
com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:274)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:514)
at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:520)
at com.caucho.util.ThreadPool.run(ThreadPool.java:442)
at java.lang.Thread.run(Thread.java:595)
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