If statements in ZUL

<?init class="org.zkoss.zkplus.databind.AnnotateDataBinderInit"?>
 <zk>
	<window style="padding:25px;">
		<zscript>		
			import org.zkoss.zkplus.databind.TypeConverter;
			
			public class myTypeConverter implements TypeConverter {
				public Object coerceToBean(java.lang.Object val, org.zkoss.zk.ui.Component comp) {
					return null;
				}
			 
				public Object coerceToUi(java.lang.Object val, org.zkoss.zk.ui.Component comp) {

					if (val == "struct") {
						Image img = new Image("http://www.zkoss.org/img/front_page_icons/rss_16.png");
						if (((Listcell) comp).getLastChild() == null) {
							((Listcell) comp).appendChild(img);
						} 
					} else {
						Label lbl = new Label("regular");
						if (((Listcell) comp).getLastChild() == null) {
							((Listcell) comp).appendChild(lbl);
						} else {
							((Listcell) comp).getLastChild().setValue(lbl.getValue());
						}
					}
					return null;
				}
			}
			
			public class Person {
				private String firstName;
				private String lastName;
				private String type;

				public Person(String fn, String ln, String t) {
					setFirstName(fn);
					setLastName(ln);
					setType(t);
				}

				public String getFirstName() {
					return firstName;
				}
				public void setFirstName(String fn) {
					firstName = fn;
				}

				public String getLastName() {
					return lastName;
				}
				public void setLastName(String ln) {
					lastName = ln;
				}

				public String getType() {
					return type;
				}
				public void setType(String t) {
					type = t;
				}
			}
		
			 List persons = new ArrayList();
			 persons.add(new Person("Jonas", "Blane", "reg"));
			 persons.add(new Person("Bob", "Brown", "struct"));
			 persons.add(new Person("Mack", "Gerhardt", "reg"));
			 persons.add(new Person("Charles", "Grey", "reg"));
			 persons.add(new Person("Tom", "Ryan", "struct"));
	   
		</zscript>
	 
		<listbox rows="5" model="@{persons}" selectedItem="@{selected}" width="300px">
			<listhead>
				<listheader label="First Name" width="100px" />
				<listheader label="Last Name" width="100px" />
				<listheader label="Converted Value" width="100px" />
			</listhead>
			<listitem self="@{each=person}" value="@{person}">
				<listcell label="@{person.firstName}" />
				<listcell label="@{person.lastName}" />
				<listcell
					label="@{person.type, converter='myTypeConverter'}" />
			</listitem>
		</listbox>
		<space spacing="25px" orient="horizontal" />
		
		<cell align="right"><label value="Back-end value:  "/></cell><textbox value="@{selected.type}" />
	</window>
</zk>