How use Enums with Wicket DropDownChoice

How use Enums with Wicket DropDownChoice

Typically dropdownChoise wicket is used with objects entities, VO, DTO. Below a simple code on how to make a dropdownChoise with Enum.

Class Enum
<br />public enum Transport {<br /><br /> CAR(1, "Car"),<br /> BUS(2, "Bus"),<br /> <br /> private int id;<br /> private String name<br /><br /> private Transport(id, String name) {<br /> this.id = id;<br /> this.name = name;<br /> }<br /> <br /> public static Transport getTypeTransport(int id) {<br /> Transport result = null;<br /><br /> for (Transport transport : values()) {<br /> if (transport.getId() == id) {<br /> result = transport;<br /> break;<br /> }<br /> }<br /><br /> return transpor;<br /> }<br /><br /> public static Transport[] getTransports(){<br /> Transport[] transports = new Transport[values().length];<br /> int i = 0;<br /> for (Transport transport : values()) {<br /> Transports[i++] = transport;<br /> }<br /> return situacoes;<br /> }<br /> <br /> public int getId() {<br /> return this.id;<br /> }<br /> public void setId(int id) {<br /> this.id = id;<br /> }<br /><br /> public String getName() {<br /> return name;<br /> }<br /><br />}<br />
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Creating drop down enum
<br /> final List<Transport> listTransports = <br /> Arrays.asList(Transport.getTransports());<br /><br /><br /> DropDownChoice ddTransports = new DropDownChoice(<br /> "transports", new PropertyModel(YourClass, "transport"),<br /> listTransports, new IChoiceRenderer() {<br /> //drop down field text<br /> public Object getDisplayValue(Object methodObj) {<br /> Transport transport = (Transport) methodObj;<br /> return transport.getName();<br /> }<br /> // drop down id <br /> public String getIdValue(Object id, int index) {<br /> Transport transport = (Transport) id;<br /> return String.valueOf(transport.getId());<br /> }<br /> });<br /> form.add(ddTransports);<br />
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HTML
<br /> <select wicket:id="transports"><br /> </select><br />