我开始使用IceFaces并且在尝试拖动支持时遇到了问题。
IceFaces 2.0.0
JSF 2.0
Mojarra 2.0.2 (FCS b10) (JSF reference implementation)
Spring 3.0.3
Hibernate 3.5.1-Final
JPA 2.0 (with OpenEntityManagerInViewFilter)
问题是LazyInitializationException在放弃时。我的第一个结论是不正确的持久化上下文生命周期管理设置，但经过几个小时的设置，依赖和调试后，我发现了一些奇怪的事情：JSF实现通过默认构造函数的反射创建PersistentSet实例（ ！）RESTORE_VIEW phase并试图为其添加值。此操作会导致LazyInitializationException，因为PersistentSet被创建为一个简单的集合，如ArrayList并且未正确配置（会话未设置）。
org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed
at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException
(AbstractPersistentCollection.java:380)
at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected
(AbstractPersistentCollection.java:372)
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365)
at org.hibernate.collection.PersistentSet.add(PersistentSet.java:212)
at javax.faces.component.UIComponentBase.restoreAttachedState(UIComponentBase.java:1582)
at javax.faces.component.ComponentStateHelper.restoreState(ComponentStateHelper.java:290)
at javax.faces.component.UIComponentBase.restoreState(UIComponentBase.java:1444)
at com.icesoft.faces.component.panelseries.UISeries.restoreState(UISeries.java:642)
at com.icesoft.faces.component.panelseries.PanelSeries.restoreState(PanelSeries.java:138)
at com.sun.faces.application.view.StateManagementStrategyImpl$2.visit(StateManagementStrategyImpl.java:231)
at com.sun.faces.component.visit.FullVisitContext.invokeVisitCallback(FullVisitContext.java:147)
at com.icesoft.faces.component.panelseries.UISeries.visitTree(UISeries.java:814)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1457)
at javax.faces.component.UIForm.visitTree(UIForm.java:333)
at com.icesoft.faces.component.panelseries.UISeries.visitColumnsAndRows(UISeries.java:898)
at com.icesoft.faces.component.panelseries.UISeries.visitTree(UISeries.java:832)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1457)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1457)
at com.sun.faces.application.view.StateManagementStrategyImpl.restoreView(StateManagementStrategyImpl.java:223)
at com.sun.faces.application.StateManagerImpl.restoreView(StateManagerImpl.java:177)
at com.sun.faces.application.view.ViewHandlingStrategy.restoreView(ViewHandlingStrategy.java:131)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.restoreView(FaceletViewHandlingStrategy.java:430)
at com.sun.faces.application.view.MultiViewHandler.restoreView(MultiViewHandler.java:143)
at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:199)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:110)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
javax.faces.FacesException: Unexpected error restoring state for component with id castle-list:j_idt12:castle-resident-list.
Cause: org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed.
at com.sun.faces.application.view.StateManagementStrategyImpl$2.visit(StateManagementStrategyImpl.java:239)
at com.sun.faces.component.visit.FullVisitContext.invokeVisitCallback(FullVisitContext.java:147)
at com.icesoft.faces.component.panelseries.UISeries.visitTree(UISeries.java:814)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1457)
at javax.faces.component.UIForm.visitTree(UIForm.java:333)
at com.icesoft.faces.component.panelseries.UISeries.visitColumnsAndRows(UISeries.java:898)
at com.icesoft.faces.component.panelseries.UISeries.visitTree(UISeries.java:832)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1457)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1457)
at com.sun.faces.application.view.StateManagementStrategyImpl.restoreView(StateManagementStrategyImpl.java:223)
at com.sun.faces.application.StateManagerImpl.restoreView(StateManagerImpl.java:177)
at com.sun.faces.application.view.ViewHandlingStrategy.restoreView(ViewHandlingStrategy.java:131)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.restoreView(FaceletViewHandlingStrategy.java:430)
at com.sun.faces.application.view.MultiViewHandler.restoreView(MultiViewHandler.java:143)
at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:199)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:110)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
Caused by: org.hibernate.LazyInitializationException:
failed to lazily initialize a collection, no session or session was closed
at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException
(AbstractPersistentCollection.java:380)
at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected
(AbstractPersistentCollection.java:372)
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365)
at org.hibernate.collection.PersistentSet.add(PersistentSet.java:212)
at javax.faces.component.UIComponentBase.restoreAttachedState(UIComponentBase.java:1582)
at javax.faces.component.ComponentStateHelper.restoreState(ComponentStateHelper.java:290)
at javax.faces.component.UIComponentBase.restoreState(UIComponentBase.java:1444)
at com.icesoft.faces.component.panelseries.UISeries.restoreState(UISeries.java:642)
at com.icesoft.faces.component.panelseries.PanelSeries.restoreState(PanelSeries.java:138)
at com.sun.faces.application.view.StateManagementStrategyImpl$2.visit(StateManagementStrategyImpl.java:231)
... 34 more
（的javax /面/组件/ UIComponentBase.java：1566年至1591年）：
if (stateObj instanceof List) {
List<StateHolderSaver> stateList = (List<StateHolderSaver>) stateObj;
Collection<Object> retCollection = null;
StateHolderSaver collectionSaver = stateList.get(0);
Class collectionClass = (Class) collectionSaver.restore(context);
try {
retCollection = (Collection<Object>) collectionClass.newInstance(); //(*)
}
catch (Exception e) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, e.toString(), e);
}
throw new IllegalStateException("Unknown object type");
}
for (int i = 1, len = stateList.size(); i < len; i++) {
try {
retCollection.add(stateList.get(i).restore(context)); //(**)
} catch (ClassCastException cce) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, cce.toString(), cce);
}
throw new IllegalStateException("Unknown object type");
}
}
result = retCollection;
}
*在我的案例中“collectionClass”是“org.hibernate.collection.PersistentSet”。**“retCollection.add”调用结果LazyInitializationException 简单的maven项目可以是downloaded here。只需将其作为网络应用程序运行，在“英雄”和“城堡”部分创建几个条目，然后尝试通过“城堡和英雄”部分中的拖放来绑定它们。
目前尚不清楚，谁负责这个问题 - JSF RI，IceFaces或我的手=） 我在IceFaces和Oracle论坛上发布了这个问题：
http://www.icefaces.org/JForum/posts/list/18539.page
http://forums.oracle.com/forums/thread.jspa?messageID=9328036
告诉我一些解决方法或指出我的错误，请=）
答案 0 :(得分：0)
我和primefaces p：selectManyCheckbox组件有类似的问题。 也许不完全是你的情况，但是将 f：attribute name =“collectionType”添加到组件可以解决问题。
<p:selectManyCheckbox value="#{offerEditBean.selectedFloors}" converter="ait.entity.converter" layout="pageDirection">
<f:attribute name="collectionType" value="java.util.HashSet" />
<f:selectItems value="#{offerEditBean.floors}" var="item" itemValue="#{item}" itemLabel="#{item.name}" />
</p:selectManyCheckbox>
仅供参考：实例变量selectedFloors从实体@OneToMany Set属性初始化。
所以，回答你的问题，这主要是一个JSF问题。
我在这里找到了这个解决方案http://forum.primefaces.org/viewtopic.php?f=3&t=30765