p:graphicImage value can not from method

UI Components for JSF
Post Reply
wuqian2hcs
Posts: 28
Joined: 19 Jun 2014, 06:18

23 Jul 2014, 10:35

Hello,
In my code,<p:outputLabel value="#{bean.method()}"/> can work.
but in p:graphicImage it got the exception

my bean code:

Code: Select all

public StreamedContent getImage() {
        ext = new CaptchaExt();
        StreamedContent sc = null;
        try {
            sc = ext.getStreamedContent();
        } catch (IOException e) {
            //TODO, log
        }
        return sc;
    }
the invoke code:

Code: Select all

<p:graphicImage id="loginImage" 
                                    value="#{userLoginBean.getImage()}"
                                    cache="false"/>
the exception log:

Code: Select all

16:24:44,970 SEVERE [javax.enterprise.resource.webcontainer.jsf.application] (default task-11) Error Rendering View[/index.xhtml]: java.io.IOException: java.lang.NullPointerException
	at org.primefaces.component.graphicimage.GraphicImageRenderer.encodeEnd(GraphicImageRenderer.java:42) [primefaces-5.0.jar:5.0]
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:85) [primefaces-5.0.jar:5.0]
	at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:68) [primefaces-5.0.jar:5.0]
	at org.primefaces.component.commandlink.CommandLinkRenderer.encodeEnd(CommandLinkRenderer.java:124) [primefaces-5.0.jar:5.0]
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1864) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at org.primefaces.component.panelgrid.PanelGridRenderer.encodeDynamicBody(PanelGridRenderer.java:89) [primefaces-5.0.jar:5.0]
	at org.primefaces.component.panelgrid.PanelGridRenderer.encodeBody(PanelGridRenderer.java:60) [primefaces-5.0.jar:5.0]
	at org.primefaces.component.panelgrid.PanelGridRenderer.encodeEnd(PanelGridRenderer.java:49) [primefaces-5.0.jar:5.0]
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:85) [primefaces-5.0.jar:5.0]
	at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:68) [primefaces-5.0.jar:5.0]
	at org.primefaces.component.layout.LayoutUnitRenderer.encodeEnd(LayoutUnitRenderer.java:49) [primefaces-5.0.jar:5.0]
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1864) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.render.Renderer.encodeChildren(Renderer.java:176) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:889) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1857) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:461) [jsf-impl-2.2.6-jbossorg-4.jar:]
	at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:133) [jsf-impl-2.2.6-jbossorg-4.jar:]
	at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120) [jsf-impl-2.2.6-jbossorg-4.jar:]
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.2.6-jbossorg-4.jar:]
	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219) [jsf-impl-2.2.6-jbossorg-4.jar:]
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:647) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:113) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:240) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:227) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:73) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:146) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.server.Connectors.executeRootHandler(Connectors.java:177) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:727) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_05]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_05]
	at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_05]
Caused by: java.lang.NullPointerException
	at org.primefaces.util.DynamicResourceBuilder.build(DynamicResourceBuilder.java:50) [primefaces-5.0.jar:5.0]
	at org.primefaces.component.graphicimage.GraphicImageRenderer.getImageSrc(GraphicImageRenderer.java:74) [primefaces-5.0.jar:5.0]
	at org.primefaces.component.graphicimage.GraphicImageRenderer.encodeEnd(GraphicImageRenderer.java:40) [primefaces-5.0.jar:5.0]
	... 55 more

16:24:45,223 SEVERE [javax.enterprise.resource.webcontainer.jsf.application] (default task-12) Error Rendering View[/index.xhtml]: java.io.IOException: java.lang.NullPointerException
	at org.primefaces.component.graphicimage.GraphicImageRenderer.encodeEnd(GraphicImageRenderer.java:42) [primefaces-5.0.jar:5.0]
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:85) [primefaces-5.0.jar:5.0]
	at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:68) [primefaces-5.0.jar:5.0]
	at org.primefaces.component.commandlink.CommandLinkRenderer.encodeEnd(CommandLinkRenderer.java:124) [primefaces-5.0.jar:5.0]
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1864) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at org.primefaces.component.panelgrid.PanelGridRenderer.encodeDynamicBody(PanelGridRenderer.java:89) [primefaces-5.0.jar:5.0]
	at org.primefaces.component.panelgrid.PanelGridRenderer.encodeBody(PanelGridRenderer.java:60) [primefaces-5.0.jar:5.0]
	at org.primefaces.component.panelgrid.PanelGridRenderer.encodeEnd(PanelGridRenderer.java:49) [primefaces-5.0.jar:5.0]
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:85) [primefaces-5.0.jar:5.0]
	at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:68) [primefaces-5.0.jar:5.0]
	at org.primefaces.component.layout.LayoutUnitRenderer.encodeEnd(LayoutUnitRenderer.java:49) [primefaces-5.0.jar:5.0]
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1864) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.render.Renderer.encodeChildren(Renderer.java:176) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:889) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1857) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:461) [jsf-impl-2.2.6-jbossorg-4.jar:]
	at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:133) [jsf-impl-2.2.6-jbossorg-4.jar:]
	at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120) [jsf-impl-2.2.6-jbossorg-4.jar:]
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.2.6-jbossorg-4.jar:]
	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219) [jsf-impl-2.2.6-jbossorg-4.jar:]
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:647) [jboss-jsf-api_2.2_spec-2.2.6.jar:2.2.6]
	at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:113) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:240) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:227) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:73) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:146) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.server.Connectors.executeRootHandler(Connectors.java:177) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:727) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_05]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_05]
	at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_05]
Caused by: java.lang.NullPointerException
	at org.primefaces.util.DynamicResourceBuilder.build(DynamicResourceBuilder.java:50) [primefaces-5.0.jar:5.0]
	at org.primefaces.component.graphicimage.GraphicImageRenderer.getImageSrc(GraphicImageRenderer.java:74) [primefaces-5.0.jar:5.0]
	at org.primefaces.component.graphicimage.GraphicImageRenderer.encodeEnd(GraphicImageRenderer.java:40) [primefaces-5.0.jar:5.0]
	... 55 more
and then I add a property in the bean.

Code: Select all

      private StreamContent imageContent;
      
      public StreamContent getImageContent(){
             this.imageContent = this.getImage();
             return imageContent;
      }
in the page:

Code: Select all

<p:graphicImage id="loginImage" 
                                    value="#{userLoginBean.imageContent}"
                                    cache="false"/>
It work well.
the value can not from method? but why the String is right?
jsf2.1
wildfly 8.1
primefaces 5.0
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