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Type:
Bug
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Resolution: Fixed
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Priority:
Normal
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Affects Version/s: 6.0.0, 8.6.2
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Component/s: ZK Update Engine
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Security Level: Jimmy
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None
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None
Steps to Reproduce
Run the zul file below, wait 2 seconds.
<div apply="BackgroundComponentCreation"/>
Current Result
NPE:
Caused by: java.lang.NullPointerException at org.zkoss.zk.ui.http.ExecutionImpl.getAttribute(ExecutionImpl.java:488) at org.zkoss.zk.ui.impl.Utils.getComponentInfos(Utils.java:117) at org.zkoss.zk.ui.impl.Utils.setComponentInfo(Utils.java:129) at org.zkoss.zk.ui.impl.AbstractUiFactory.newComponent(AbstractUiFactory.java:137) at org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:918) at org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:888) at org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:775) at org.zkoss.zk.ui.impl.UiEngineImpl.execCreate(UiEngineImpl.java:739) at org.zkoss.zk.ui.impl.UiEngineImpl.createComponents(UiEngineImpl.java:1142) at org.zkoss.zk.ui.impl.AbstractExecution.createComponentsDirectly(AbstractExecution.java:389) at org.zkoss.zk.ui.Executions.createComponentsDirectly(Executions.java:413)
Expected Result
working component creation or meaningful error
Debug Info
this used to work up to ZK 5.0.13
Root Cause
the Execution implementation CCExecution (dedicated to component creation outside an active execution) fails when calling getAttribute/setAttribute
Workaround
The attached composer contains a prototypic implementation of CCExecution (commented out), when using it the error doesn't occur and the created components can be appended to a parent component
- relates to
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ZK-882 Add the ComponentInfo to the id generator
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- Closed
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