how to dynamic binding with java code? [closed]

public class CustomRenderer implements RowRenderer {
		
		@Override
		public void render(Row row, Object data, int index) throws Exception {
			
			Employee bean = (Employee) data;

			final String beanid = row.getUuid();
			binder.bindBean(beanid, employee);
			
			final Intbox txtCode = new Intbox();
			row.appendChild( txtCode );			
			binder.addBinding(txtCode, "value", beanid + ".code", new String[] {}, "none", "both", null);
			
			final Label lblLastname = new Label();
			row.appendChild( lblLastname );
		        binder.addBinding(lblLastname, "value", beanid + ".lastName");

			final Intbox txtAdvance = new Intbox();
			row.appendChild( txtAdvance );			
                        binder.addBinding(txtAdvance, "value", beanid + ".advanceValue", new String[] {}, "none", "both", null);
              
            ................
            ................
            ................

          . . . . . . . . . 
          private AnnotateDataBinder binder;
          . . . . . . . . . 
          . . . . . . . . . 
	@Override
	public void doAfterCompose(Component comp) throws Exception {
		
		try {
			super.doAfterCompose(comp);
		} 
		catch (Exception e) {
			e.printStackTrace();
		}

		binder = new AnnotateDataBinder(comp);
                . . . . . . . . . 
                . . . . . . . . . 

	public void render(Row row, Employee emp, int index) {
		/*
		 * Decide the position (column number) of the decimal box depending on the employee's rank
		 */
		if (emp.rank == 1) {	
			Div div = new Div();
			row.appendChild( div );
			Decimalbox txtSalaryAmount = new Decimalbox();
			row.appendChild(txtSalaryAmount);
		}
		else
		if (emp.rank == 4) {	
			/* add 3 dummy labels first */
			row.appendChild(new Label(""));
			row.appendChild(new Label(""));
			row.appendChild(new Label(""));
			
			Div div = new Div();
			row.appendChild( div );
			Decimalbox txtSalaryAmount = new Decimalbox();
			row.appendChild(txtSalaryAmount);
		}
    }

		
binder.bindBean("person", person);
binder.bindBean("persons", persons);
binder.loadAll();

		
binder.bindBean("person", person);
binder.bindBean("persons", persons);
binder.addBinding(listBoxPerson, "model", "persons");
binder.addBinding(listBoxPerson, "selectedItem", "person");

binder.loadAll();

<window apply="org.zkoss.bind.BindComposer" width="600px"
	viewModel="@id('vm') @init('org.zkoss.zktest.bind.adv.DynamicCol')">
	<hlayout width="100%">
		<vlayout width="500px">
			<radiogroup>
				<radio label="case 1"
					onCheck="@command('doCase',case = 1)" />
				<radio label="case 2"
					onCheck="@command('doCase',case = 2)" />
				<radio label="case 3"
					onCheck="@command('doCase',case = 3)" />
			</radiogroup>

			<listbox model="@bind(vm.items) @template(vm.template)"
				selectedItem="@bind(vm.selected)" rows="10">
				<listhead children="@bind(vm.columns)">
					<template name="children">
						<listheader label="@bind(each.header)" />
					</template>
				</listhead>
			</listbox>
		</vlayout>
		<vlayout>
			<label value="@bind(vm.selected.value1)" />
			<label value="@bind(vm.selected.value2)" />
			<label value="@bind(vm.selected.value3)" />
		</vlayout>
	</hlayout>
</window>

package org.zkoss.zktest.bind.adv;

import java.util.ArrayList;
import java.util.List;

import org.zkoss.bind.annotation.BindingParam;
import org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.NotifyChange;
import org.zkoss.zk.ui.util.Template;

public class DynamicCol {
	List<Item> items;
	List<ColMeta> columns;
	Item selected;

	Template template;
	
	public DynamicCol(){
		items = new ArrayList<Item>();
		for(int i=0;i<100;i++){
			items.add(new Item("item"+i));
		}
		columns = new ArrayList<ColMeta>();
		columns.add(ColMeta.field1);
		columns.add(ColMeta.field2);
		columns.add(ColMeta.field3);
		template = ColMeta.newTemplate(columns);
	}
	
	public Template getTemplate(){
		return template;
	}

	public List<Item> getItems() {
		return items;
	}

	public Item getSelected() {
		return selected;
	}

	public void setSelected(Item selected) {
		this.selected = selected;
	}

	public void setItems(List<Item> items) {
		this.items = items;
	}

	public List<ColMeta> getColumns() {
		return columns;
	}
	
	
	@Command @NotifyChange({"template","columns"})
	public void doCase(@BindingParam("case") int theCase){
		columns.clear();
		switch(theCase){
		case 2:
			columns.add(ColMeta.field3);
			columns.add(ColMeta.field1);
			columns.add(ColMeta.field2);
			break;
		case 3:
			columns.add(ColMeta.field2);
			columns.add(ColMeta.field1);
			break;
		default:
			columns.add(ColMeta.field3);
			columns.add(ColMeta.field2);
			columns.add(ColMeta.field1);
			break;
		}
		template = ColMeta.newTemplate(columns);
	}

	public static class Item{
		String value1;
		String value2;
		Integer value3;
		
		public Item(String prefix){
			value1 = prefix+"_1";
			value2 = prefix+"_2";
			value3 = 99;
		}

		public String getValue1() {
			return value1;
		}

		public void setValue1(String value1) {
			this.value1 = value1;
		}

		public String getValue2() {
			return value2;
		}

		public void setValue2(String value2) {
			this.value2 = value2;
		}

		public Integer getValue3() {
			return value3;
		}

		public void setValue3(Integer value3) {
			this.value3 = value3;
		}
	}
	
	
}

package org.zkoss.zktest.bind.adv;

import java.util.List;

import org.zkoss.zk.ui.util.Template;

public class ColMeta {
	
	
	public static final ColMeta field1 = new ColMeta("Col 1","value1");
	public static final ColMeta field2 = new ColMeta("Col 2","value2");
	public static final ColMeta field3 = new ColMeta("Col 3","value3");
	
	public static Template newTemplate(List<ColMeta> columns){
		return new ColMetaTemplate(columns);
	}
	
	String header;
	String fileName;

	public ColMeta(String header, String fieldName) {
		this.header = header;
		this.fileName = fieldName;
	}

	public String getHeader() {
		return header;
	}

	public String getFiledName() {
		return fileName;
	}
	
}

package org.zkoss.zktest.bind.adv;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.zkoss.xel.VariableResolver;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.util.Composer;
import org.zkoss.zk.ui.util.Template;
import org.zkoss.zul.Listcell;
import org.zkoss.zul.Listitem;

public class ColMetaTemplate implements Template {

	List<ColMeta> columns;
	Map parameters = new HashMap();
	
	public ColMetaTemplate(List<ColMeta> columns){
		this.columns = columns;
	}
	
	@Override
	public Component[] create(Component parent, Component insertBefore, VariableResolver resolver, Composer composer) {
		Listitem listitem = new Listitem();
		for(ColMeta col:columns){
			Listcell cell = new Listcell();
			//set annotation
			Map anno = new HashMap();
			anno.put("value", "each."+col.getFiledName());
			cell.addAnnotation("label", "bind", anno);
			listitem.appendChild(cell);
		}
		parent.insertBefore(listitem, insertBefore);
		return new Component[]{listitem};
	}

	@Override
	public Map<String, Object> getParameters() {
		return parameters;
	}

}