{"id":1099,"date":"2013-02-10T12:49:34","date_gmt":"2013-02-10T10:49:34","guid":{"rendered":"http:\/\/hasselba.ch\/blog\/?p=1099"},"modified":"2013-02-10T12:49:34","modified_gmt":"2013-02-10T10:49:34","slug":"xpages-compositedata-is-undefined","status":"publish","type":"post","link":"https:\/\/hasselba.ch\/blog\/?p=1099","title":{"rendered":"XPages: compositeData is undefined"},"content":{"rendered":"

An interesting question was asked on StackOverflow.com: The compositeData of custom control is undefined in beforeRenderResponse event<\/a>. I have never noticed this before, but if you are accessing the compositeData<\/em> object in the before-<\/em>, afterRenderResponse <\/em>or the afterRestoreView <\/em> event, the object is undefined<\/em>.<\/p>\n

Here is a simple demonstration CC which just prints the type of the compositeData<\/em> object to the console:<\/p>\n

<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<xp:view xmlns:xp=\"http:\/\/www.ibm.com\/xsp\/core\">\r\n\r\n\u00a0\u00a0 \u00a0<xp:this.beforePageLoad>\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<![CDATA[#{javascript:print( \"beforePageLoad: \" + typeof( compositeData )) }]]>\r\n\u00a0\u00a0 \u00a0<\/xp:this.beforePageLoad>\r\n\r\n\u00a0\u00a0 \u00a0<xp:this.afterPageLoad>\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<![CDATA[#{javascript:print( \"afterPageLoad: \" + typeof( compositeData )) }]]>\r\n\u00a0\u00a0 \u00a0<\/xp:this.afterPageLoad>\r\n\r\n\u00a0\u00a0 \u00a0<xp:this.afterRestoreView>\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<![CDATA[#{javascript:print( \"afterRestoreView: \"\u00a0 + typeof( compositeData )) }]]>\r\n\u00a0\u00a0 \u00a0<\/xp:this.afterRestoreView>\r\n\r\n\u00a0\u00a0 \u00a0<xp:this.beforeRenderResponse>\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<![CDATA[#{javascript: print( \"beforeRenderResponse: \"\u00a0 + typeof( compositeData )) }]]>\r\n\u00a0\u00a0 \u00a0<\/xp:this.beforeRenderResponse>\r\n\r\n\u00a0\u00a0 \u00a0<xp:this.afterRenderResponse>\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<![CDATA[#{javascript: print( \"afterRenderResponse: \"\u00a0 + typeof( compositeData )) }]]>\r\n\u00a0\u00a0 \u00a0<\/xp:this.afterRenderResponse>\r\n\r\n<\/xp:view><\/code><\/pre>\n
And here is a screenshot of the console, including a partial refresh of the page:<\/p>\n
\"\"<\/p>\n
Only in the PageLoad events the compositeData<\/em> object is available. But why?<\/p>\n
The answer is rather simple: The events are executed in a different context. The PageLoad events are running „inside“ of the UIInlcudeComposite<\/em> (the Custom Control), the other events are running in the UIViewRoot<\/em>:<\/p>\n
\"\"<\/p>\n
That’s why the compositeData<\/em> is undefined<\/em> in these events. To use the object in the events, you have to do the following:<\/p>\n
First you have to add an ID to your custom control:<\/p>\n
<xc:ccWithId test=\"foo\" id=\"ccWithId\" \/><\/code><\/pre>\n
This allows you to access the CC as a regular component with getComponent()<\/em>. Now you can access the com.ibm.xsp.binding.PropertyMap<\/em> of the component in the custom control’s event which holds the variable you want:<\/p>\n
<xp:this.beforeRenderResponse>\r\n   <![CDATA[#{javascript:\r\n      var cmp:com.ibm.xsp.component.UIIncludeComposite = getComponent(\"ccWithId\");\r\n      print(\"Value of 'test' -> \" + cmp.getPropertyMap().getString(\"test\") )\r\n   }]]>\r\n<\/xp:this.beforeRenderResponse><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
An interesting question was asked on StackOverflow.com: The compositeData of custom control is undefined in beforeRenderResponse event. I have never noticed this before, but if you are accessing the compositeData object in the before-, afterRenderResponse or the afterRestoreView event, the … Weiterlesen →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[89,26,76,74],"tags":[33,7,31,4,86,5,32,3],"class_list":["post-1099","post","type-post","status-publish","format-standard","hentry","category-java","category-jsf","category-ssjs","category-xpages","tag-8-5-3","tag-domino","tag-java","tag-js","tag-jsf","tag-ssjs","tag-tipp","tag-xpages"],"_links":{"self":[{"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1099","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1099"}],"version-history":[{"count":6,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1099\/revisions"}],"predecessor-version":[{"id":1105,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1099\/revisions\/1105"}],"wp:attachment":[{"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1099"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1099"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1099"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}