JSF selectOneMenu: extending MenuRenderer for displaying a plain text when there is one item -

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i want display like

<span ...>an item</span>

instead of

<select ...>  <option ...>an item</option> </select>

when menu's plaintext option set true , there 1 selectitem inside:

<h:selectonemenu plaintext="true" ...>  <f:selectitems ... /> <!-- contains 1 item --> </h:selectonemenu>

i've tried creating custom renderer extended menurenderer, code not appendable. can it? thanks.

we need extend com.sun.faces.renderkit.html_basic.menurenderer , override renderselect , renderoption methods. code copied parent. private boolean plaintext true when need display element span. @ begginning of renderselect add this:

plaintext = "true".equalsignorecase((string) component.getattributes().get("plaintext")); if (plaintext) {     selectitemsiterator<selectitem> items = renderkitutils.getselectitems(context, component);     items.next();     plaintext = !items.hasnext(); }

it first checks if plaintext option set true, checks if there selectitem. think part can optimised. instead of

writer.startelement("select", component);

we should write 

if (plaintext) {     writer.startelement("span", component); } else {     writer.startelement("select", component); }

and same writer.endelement.

in middle of renderoption add code print out option without tags , leave.

if (plaintext) {     if (curitem.isescape()) {         string label = curitem.getlabel();         if (label == null) {             label = valuestring;         }         writer.writetext(label, component, "label");     } else {         writer.write(curitem.getlabel());     }     writer.writetext("\n", component, null);     return true; }

all code:

import com.sun.faces.io.faststringwriter; import com.sun.faces.renderkit.attribute; import com.sun.faces.renderkit.attributemanager; import com.sun.faces.renderkit.renderkitutils; import com.sun.faces.renderkit.selectitemsiterator; import com.sun.faces.renderkit.html_basic.menurenderer;  import javax.faces.component.uicomponent; import javax.faces.context.facescontext; import javax.faces.context.responsewriter; import javax.faces.convert.converter; import javax.faces.model.selectitem; import java.io.ioexception; import java.util.logging.level;  public class extendedmenurenderer extends menurenderer {     private boolean plaintext;      private static final attribute[] attributes =             attributemanager.getattributes(attributemanager.key.selectmanymenu);      @override     protected void renderselect(facescontext context,                                 uicomponent component) throws ioexception {         plaintext = "true".equalsignorecase((string) component.getattributes().get("plaintext"));         if (plaintext) {             selectitemsiterator<selectitem> items = renderkitutils.getselectitems(context, component);             items.next();             plaintext = !items.hasnext();         }          responsewriter writer = context.getresponsewriter();         assert (writer != null);          if (logger.isloggable(level.finer)) {             logger.log(level.finer, "rendering 'select'");         }         if (plaintext) {             writer.startelement("span", component);         } else {             writer.startelement("select", component);         }         writeidattributeifnecessary(context, writer, component);         writer.writeattribute("name", component.getclientid(context),                 "clientid");         // render styleclass attribute if present.         string styleclass;         if (null !=                 (styleclass =                         (string) component.getattributes().get("styleclass"))) {             writer.writeattribute("class", styleclass, "styleclass");         }         if (!getmultipletext(component).equals("")) {             writer.writeattribute("multiple", true, "multiple");         }          // determine how many option(s) need render, , update         // component's "size" attribute accordingly;  "size"         // attribute rendered 1 of "pass thru" attributes         selectitemsiterator<selectitem> items = renderkitutils.getselectitems(context, component);          // render options buffer can determine         // size         faststringwriter bufferedwriter = new faststringwriter(128);         context.setresponsewriter(writer.clonewithwriter(bufferedwriter));         int count = renderoptions(context, component, items);         context.setresponsewriter(writer);         // if "size" *not* set explicitly, have default correctly         integer size = (integer) component.getattributes().get("size");         if (size == null || size == integer.min_value) {             size = count;         }         writedefaultsize(writer, size);          renderkitutils.renderpassthruattributes(context,                 writer,                 component,                 attributes,                 getnononchangebehaviors(component));         renderkitutils.renderxhtmlstylebooleanattributes(writer,                 component);          renderkitutils.renderonchange(context, component, false);          // now, write buffered option content         writer.write(bufferedwriter.tostring());          if (plaintext) {             writer.endelement("span");         } else {             writer.endelement("select");         }      }      @override     protected boolean renderoption(facescontext context,                                    uicomponent component,                                    uicomponent selectcomponent,                                    converter converter,                                    selectitem curitem,                                    object currentselections,                                    object[] submittedvalues,                                    optioncomponentinfo optioninfo) throws ioexception {          object valuesarray;         object itemvalue;         string valuestring = getformattedvalue(context, component,                 curitem.getvalue(), converter);         boolean containsvalue;         if (submittedvalues != null) {             containsvalue = containsavalue(submittedvalues);             if (containsvalue) {                 valuesarray = submittedvalues;                 itemvalue = valuestring;             } else {                 valuesarray = currentselections;                 itemvalue = curitem.getvalue();             }         } else {             valuesarray = currentselections;             itemvalue = curitem.getvalue();         }          boolean isselected = isselected(context, component, itemvalue, valuesarray, converter);         if (optioninfo.ishidenoselection()                 && curitem.isnoselectionoption()                 && currentselections != null                 && !isselected) {             return false;         }          responsewriter writer = context.getresponsewriter();         assert (writer != null);         writer.writetext("\t", component, null);          if (plaintext) {             if (curitem.isescape()) {                 string label = curitem.getlabel();                 if (label == null) {                     label = valuestring;                 }                 writer.writetext(label, component, "label");             } else {                 writer.write(curitem.getlabel());             }             writer.writetext("\n", component, null);             return true;         }          writer.startelement("option", (null != selectcomponent) ? selectcomponent : component);         writer.writeattribute("value", valuestring, "value");          if (isselected) {             writer.writeattribute("selected", true, "selected");         }          // if component disabled, "disabled" attribute rendered         // on "select" tag, don't render "disabled" on every option.         if ((!optioninfo.isdisabled()) && curitem.isdisabled()) {             writer.writeattribute("disabled", true, "disabled");         }          string labelclass;         if (optioninfo.isdisabled() || curitem.isdisabled()) {             labelclass = optioninfo.getdisabledclass();         } else {             labelclass = optioninfo.getenabledclass();         }         if (labelclass != null) {             writer.writeattribute("class", labelclass, "labelclass");         }          if (curitem.isescape()) {             string label = curitem.getlabel();             if (label == null) {                 label = valuestring;             }             writer.writetext(label, component, "label");         } else {             writer.write(curitem.getlabel());         }         writer.endelement("option");         writer.writetext("\n", component, null);         return true;     } }

in faces-config.xml add:

<render-kit>     <renderer>         <component-family>javax.faces.selectone</component-family>         <renderer-type>javax.faces.menu</renderer-type>         <renderer-class>ru.mycityseason.extentions.extendedmenurenderer</renderer-class>     </renderer> </render-kit>

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