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POJSF MethodExpression isn't triggering my backing bean action
 

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  1. POJSF MethodExpression isn't triggering my backing bean action
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    <p>I have the problem that my code isn't triggering the action in my backing bean. The code is as follows:</p> <pre><code>HtmlCommandButton replyCommentButton = new HtmlCommandButton(); replyCommentButton.setId("replyCommentButton" + commentCounter); replyCommentButton.setValue("Create reply"); String action = "#{Handler.action_replyToComment}"; MethodExpression methodExpression = FacesContext.getCurrentInstance().getApplication().getExpressionFactory(). createMethodExpression(FacesContext.getCurrentInstance().getELContext(), action, null, new Class&lt;?&gt;[0]); replyCommentButton.setActionExpression(methodExpression); </code></pre> <p>In my backing bean called RequestHandlerBean, defined in FacesConfig as Handler, I have the following code:</p> <pre><code>public void action_replyToComment() { logger.info("Homemade action called!!!"); System.out.println("Homemade action called!!!"); } </code></pre> <p>Does anyone spot why nothing happens when I click the button? It isn't triggering the event properly. The source of the html code is as follows:</p> <pre><code>&lt;input id="replyCommentButton1" type="submit" value="Create reply" name="replyCommentButton1"/&gt; </code></pre> <p>As we can see there's no action defined in the HTML. </p> <p><strong>Edit 2:</strong> I just found out in Javadoc that my action method has to be a public String. I've changed this in my backing bean now so the code in my backing bean is:</p> <pre><code>public String action_replyToComment() { logger.info("Homemade action called!!!"); System.out.println("Homemade action called!!!"); return null; } </code></pre> <hr> <p>Edit2: I've also made sure that I have it encapsulated within a tag, but still no luck. Shouldn't there be a action attribute on the element?</p> <hr> <p><strong>Edit3: My bean is defined in my faces-config like this:</strong></p> <pre><code>&lt;managed-bean&gt; &lt;description&gt; Handles the specific request. &lt;/description&gt; &lt;managed-bean-name&gt;Handler&lt;/managed-bean-name&gt; &lt;managed-bean-class&gt;no.ngt.tech.rt2.beans.RequestHandlerBean&lt;/managed-bean-class&gt; &lt;managed-bean-scope&gt;request&lt;/managed-bean-scope&gt; &lt;/managed-bean&gt; </code></pre> <p>Also if I choose to output in my JSF page like this: </p> <pre><code>&lt;a4j:commandButton action="#{Handler.action_replyToComment}" value="Reply" /&gt; </code></pre> <p>That works perfectly</p> <p><strong>EDIT 4 - MY JSP PAGE</strong> Note Ive also tried using the depreciated setAction(methodBinding) now too, but sadly it didnt work either. </p> <pre><code>&lt;%@ include file="_includes.jsp" %&gt; &lt;f:view&gt; &lt;html&gt; &lt;head&gt; &lt;title&gt;&lt;h:outputText value="#{msgs.title}" /&gt;&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;br /&gt;&lt;br /&gt;&lt;br /&gt; &lt;%@ include file="_menu.jsp" %&gt; &lt;rich:tabPanel switchType="client"&gt; &lt;rich:tab id="commentsTab" label="Comments" rendered="#{Handler.editRequest}"&gt; &lt;h:form&gt; &lt;ngt:commentTree binding="#{Handler.commentTree}" value="#{Handler.comments}" /&gt; &lt;br /&gt; &lt;a4j:commandButton action="#{Handler.action_replyToComment}" value="testbutton" /&gt; &lt;/h:form&gt; &lt;/rich:tab&gt; &lt;/rich:tabPanel&gt; &lt;/body&gt; &lt;/html&gt; &lt;/f:view&gt; </code></pre> <p><strong>menu.jsp:</strong></p> <pre><code>&lt;h:form&gt; &lt;rich:toolBar itemSeparator="line" styleClass="toolbar" contentClass="toolbar" height="22"&gt; &lt;rich:toolBarGroup&gt; &lt;rich:menuItem submitMode="server" value="Front" action="#{newRT.action_showFront}" /&gt; &lt;/rich:toolBarGroup&gt; &lt;rich:toolBarGroup&gt; &lt;rich:menuItem submitMode="server" value="New request" action="#{Step.action_showSteps}" /&gt; &lt;/rich:toolBarGroup&gt; &lt;rich:toolBarGroup&gt; &lt;rich:menuItem submitMode="server" value="Requests" action="#{Handler.action_showRequestsView}" /&gt; &lt;/rich:toolBarGroup&gt; &lt;rich:toolBarGroup&gt; &lt;rich:menuItem submitMode="server" value="Control-panel" action="#" /&gt; &lt;/rich:toolBarGroup&gt; &lt;rich:toolBarGroup location="right"&gt; &lt;h:inputText styleClass="barsearch" value="#{Handler.search}" /&gt; &lt;a4j:commandButton styleClass="barsearchbutton" action="#{Handler.action_GetRequestFromID}" value="Search" /&gt; &lt;/rich:toolBarGroup&gt; &lt;/rich:toolBar&gt; &lt;/h:form&gt; &lt;br/&gt;&lt;br/&gt; </code></pre> <p><strong>Includes.jsp</strong></p> <pre><code>&lt;%@ taglib prefix="h" uri="http://java.sun.com/jsf/html" %&gt; &lt;%@ taglib prefix="f" uri="http://java.sun.com/jsf/core" %&gt; &lt;%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %&gt; &lt;%@ taglib prefix="a4j" uri="http://richfaces.org/a4j" %&gt; &lt;%@ taglib prefix="rich" uri="http://richfaces.org/rich"%&gt; &lt;%@ taglib prefix="ngt" uri="http://MySpecialTagLib.no/"%&gt; </code></pre> <p><strong>Edit 7 - Java code for UIComponent:</strong></p> <p>This is CommentsTreeUI.java:</p> <pre><code>public class CommentsTreeUI extends UIOutput { private static Logger logger = Logger.getLogger(CommentsTreeUI.class.getName()); @Override public void encodeBegin(FacesContext context) throws IOException { List&lt;CommentTag&gt; value = (List&lt;CommentTag&gt;) getAttributes().get("value"); int commentCounter = 0; if (value != null) { for (CommentTag comment : value) { commentCounter++; ResponseWriter commentContainerWriter = context.getResponseWriter(); commentContainerWriter.startElement("div", this); commentContainerWriter.writeAttribute("id", "Comment" + commentCounter, null); String width = comment.getWidth(); String height = comment.getHeight(); String style = comment.getStyle(); style = (style != null) ? style + ";" : ""; if (width != null) { style += "width:" + width + ";"; } if (height != null) { style += "height:" + height + ";"; } commentContainerWriter.writeAttribute("style", style, null); String newComment = comment.getNewComment(); if (newComment == null) { newComment = "false"; } String level = comment.getLevel(); if (level != null) { level = "commentContainerLevel" + level + newComment; } commentContainerWriter.writeAttribute("class", level, null); String title = comment.getTitle(); if (title != null) { commentContainerWriter.writeAttribute("title", title, null); } String titleText = comment.getTitleText(); if (titleText != null) { ResponseWriter titleTextWriter = context.getResponseWriter(); UIOutput titleTextComponent = new UIOutput(); titleTextWriter.startElement("div", titleTextComponent); titleTextWriter.writeAttribute("class", "commentHeaderText" + newComment, null); titleTextWriter.writeText(titleText + " | ", null); titleTextWriter.startElement("a", titleTextComponent); titleTextWriter.writeAttribute("onclick", "showCommentReply('CommentReply" + commentCounter + "')", null); titleTextWriter.writeAttribute("class", "reply", null); titleTextWriter.writeText("Reply", null); titleTextWriter.endElement("a"); titleTextWriter.endElement("div"); } String commentBody = comment.getCommentBody(); if (commentBody != null) { ResponseWriter commentBodyWriter = context.getResponseWriter(); UIOutput commentBodyComponent = new UIOutput(); commentBodyWriter.startElement("div", commentBodyComponent); commentBodyWriter.writeText(commentBody, null); commentBodyWriter.endElement("div"); } ResponseWriter replyContainerWriter = context.getResponseWriter(); UIOutput replyContainerComponent = new UIOutput(); replyContainerWriter.startElement("div", replyContainerComponent); commentContainerWriter.writeAttribute("id", "CommentReply" + commentCounter, null); replyContainerWriter.writeAttribute("class", "replyContainer", null); ResponseWriter replyHeaderWriter = context.getResponseWriter(); UIOutput replyHeaderComponent = new UIOutput(); replyHeaderWriter.startElement("div", replyHeaderComponent); replyHeaderWriter.writeAttribute("class", "replyHeaderContainer", null); replyHeaderWriter.endElement("div"); ResponseWriter replyFormWriter = context.getResponseWriter(); UIInput replyFormComponent = new UIInput(); replyFormWriter.startElement("fieldset", replyFormComponent); replyFormWriter.startElement("textarea", replyFormComponent); replyFormWriter.writeAttribute("type", "textarea", null); replyFormWriter.writeAttribute("rows", "5", null); replyFormWriter.writeAttribute("cols", "76", null); replyFormWriter.writeText("Write your answer here", null); replyFormWriter.endElement("textarea"); //TODO: Fix so button has action to backing bean HtmlAjaxCommandButton replyCommentButton = new HtmlAjaxCommandButton(); replyCommentButton.setId("replyCommentButton" + commentCounter); replyCommentButton.setValue("Create reply"); String action = "#{RequestHandlerBean.action_replyToComment}"; //replyCommentButton.setReRender("commentsTree"); ExpressionFactory factory = context.getApplication().getExpressionFactory(); Class [] argtypes=new Class[1]; argtypes[0]=ActionEvent.class; MethodExpression replyActionExpression = factory.createMethodExpression(context.getELContext(), action, null, argtypes); replyCommentButton.setActionExpression(replyActionExpression); MethodExpression methodExpression = context.getCurrentInstance().getApplication().getExpressionFactory(). createMethodExpression(context.getCurrentInstance().getELContext(), action, null, new Class&lt;?&gt;[0]); replyCommentButton.setActionExpression(methodExpression); /* replyCommentButton.setAction(context.getApplication().createMethodBinding(action, argtypes)); */ replyCommentButton.encodeAll(context); //Todo above replyFormWriter.writeText(" ", null); replyFormWriter.startElement("input", replyFormComponent); replyFormWriter.writeAttribute("type", "button", null); replyFormWriter.writeAttribute("value", "Cancel ", null); replyFormWriter.writeAttribute("onclick", "hideCommentReply('CommentReply" + commentCounter + "')", title); replyFormWriter.endElement("input"); replyFormWriter.endElement("fieldset"); replyContainerWriter.endElement("div"); commentContainerWriter.endElement("div"); } } else { //value==null ResponseWriter writer = context.getResponseWriter(); writer.startElement("div", this); writer.writeAttribute("id", getClientId(context), null); String width = (String) getAttributes().get("width"); String height = (String) getAttributes().get("height"); String style = (String) getAttributes().get("style"); style = (style != null) ? style + ";" : ""; if (width != null) { style += "width:" + width + ";"; } if (height != null) { style += "height:" + height + ";"; } writer.writeAttribute("style", style, null); String styleClass = (String) getAttributes().get("styleClass"); if (styleClass != null) { writer.writeAttribute("class", styleClass, null); } String title = (String) getAttributes().get("title"); if (title != null) { writer.writeAttribute("title", title, null); } } } @Override public void encodeEnd(FacesContext context) throws IOException { ResponseWriter writer = context.getResponseWriter(); writer.endElement("div"); } </code></pre> <p>This is CommenstTreeTag:</p> <pre><code>public class CommentsTreeTag extends UIComponentTag { String style; String styleClass; String title; String width; String height; String value; Long parentId; public void release() { // the super class method should be called super.release(); style = null; styleClass = null; title = null; height = null; width = null; parentId = null; value = null; } @Override protected void setProperties(UIComponent component) { // the super class method should be called super.setProperties(component); if (style != null) { component.getAttributes().put("style", style); } if (styleClass != null) { component.getAttributes().put("styleClass", styleClass); } if (width != null) { component.getAttributes().put("width", width); } if (height != null) { component.getAttributes().put("height", height); } if (title != null) { if (isValueReference(title)) { ValueBinding vb = getFacesContext().getApplication().createValueBinding(title); component.setValueBinding("title", vb); } else { component.getAttributes().put("title", title); } } if (value != null) { if (isValueReference(value)) { ValueBinding vb = getFacesContext().getApplication().createValueBinding(value); component.setValueBinding("value", vb); getFacesContext().getApplication().createValueBinding(value); } else { component.getAttributes().put("value", value); } } if (parentId != null) { component.getAttributes().put("parentId", parentId); } } public String getComponentType() { return "commentTree"; } public String getRendererType() { // null means the component renders itself return null; } public String getHeight() { return height; } public void setHeight(String height) { this.height = height; } public String getWidth() { return width; } public void setWidth(String width) { this.width = width; } public String getStyle() { return style; } public void setStyle(String style) { this.style = style; } public String getStyleClass() { return styleClass; } public void setStyleClass(String styleClass) { this.styleClass = styleClass; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getValue() { return value; } public void setValue(String value) { this.value = value; } } </code></pre>
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    1. COI would like to know the related code of your jsf page, not the html output. Can you add it?
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    2. COMaybe you can try with the oldest way (using createMethodBinding, instead of createMethodExpression). See my edit response.
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      1. USromaintaz
    3. COCan we see the complete Java code ? How do you add your Java-created component in the JSF component tree?
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      1. USromaintaz
 

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