<a:form id="form"> <h:panelGrid columns="3" style="margin:10px 0"> <a:outputLabel for="template" value="Template:" style="font-weight:bold"/> <a:inputText id="template" value="#{dtColumnsView.columnTemplate}" size="50"/> <a:commandButton update="cars" actionListener="#{dtColumnsView.updateColumns}" value="Update" process="@parent" icon="ui-icon-refresh" oncomplete="PF('carsTable').clearFilters()"/> </h:panelGrid> <a:dataTable id="cars" var="car" value="#{dtColumnsView.cars}" widgetVar="carsTable" filteredValue="#{dtColumnsView.filteredCars}"> <a:columns value="#{dtColumnsView.columns}" var="column" columnIndexVar="colIndex" sortBy="#{car[column.property]}" filterBy="#{car[column.property]}"> <f:facet name="header"> <h:outputText value="#{column.header}" /> </f:facet> <h:outputText value="#{car[column.property]}" /> </a:columns> </a:dataTable> </a:form>
package com.jarch.showcase.view.data.datatable; import java.io.Serializable; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import javax.annotation.PostConstruct; import javax.faces.bean.ManagedBean; import javax.faces.bean.ManagedProperty; import javax.faces.bean.ViewScoped; import javax.faces.component.UIComponent; import javax.faces.context.FacesContext; import org.primefaces.showcase.domain.Car; import org.primefaces.showcase.service.CarService; @ManagedBean(name="dtColumnsView") @ViewScoped public class ColumnsView implements Serializable { private final static List<String> VALID_COLUMN_KEYS = Arrays.asList("id", "brand", "year", "color", "price"); private String columnTemplate = "id brand year"; private List<ColumnModel> columns; private List<Car> cars; private List<Car> filteredCars; @ManagedProperty("#{carService}") private CarService service; @PostConstruct public void init() { cars = service.createCars(10); createDynamicColumns(); } public List<Car> getCars() { return cars; } public List<Car> getFilteredCars() { return filteredCars; } public void setFilteredCars(List<Car> filteredCars) { this.filteredCars = filteredCars; } public void setService(CarService service) { this.service = service; } public String getColumnTemplate() { return columnTemplate; } public void setColumnTemplate(String columnTemplate) { this.columnTemplate = columnTemplate; } public List<ColumnModel> getColumns() { return columns; } private void createDynamicColumns() { String[] columnKeys = columnTemplate.split(" "); columns = new ArrayList<ColumnModel>(); for(String columnKey : columnKeys) { String key = columnKey.trim(); if(VALID_COLUMN_KEYS.contains(key)) { columns.add(new ColumnModel(columnKey.toUpperCase(), columnKey)); } } } public void updateColumns() { //reset table state UIComponent table = FacesContext.getCurrentInstance().getViewRoot().findComponent(":form:cars"); table.setValueExpression("sortBy", null); //update columns createDynamicColumns(); } public static class ColumnModel implements Serializable { private String header; private String property; public ColumnModel(String header, String property) { this.header = header; this.property = property; } public String getHeader() { return header; } public String getProperty() { return property; } } }
package com.jarch.showcase.service; import java.util.ArrayList; import java.util.List; import java.util.UUID; import javax.faces.bean.ApplicationScoped; import javax.faces.bean.ManagedBean; import org.primefaces.showcase.domain.Car; @ManagedBean(name = "carService") @ApplicationScoped public class CarService { private final static String[] colors; private final static String[] brands; static { colors = new String[10]; colors[0] = "Black"; colors[1] = "White"; colors[2] = "Green"; colors[3] = "Red"; colors[4] = "Blue"; colors[5] = "Orange"; colors[6] = "Silver"; colors[7] = "Yellow"; colors[8] = "Brown"; colors[9] = "Maroon"; brands = new String[10]; brands[0] = "BMW"; brands[1] = "Mercedes"; brands[2] = "Volvo"; brands[3] = "Audi"; brands[4] = "Renault"; brands[5] = "Fiat"; brands[6] = "Volkswagen"; brands[7] = "Honda"; brands[8] = "Jaguar"; brands[9] = "Ford"; } public List<Car> createCars(int size) { List<Car> list = new ArrayList<Car>(); for(int i = 0 ; i < size ; i++) { list.add(new Car(getRandomId(), getRandomBrand(), getRandomYear(), getRandomColor(), getRandomPrice(), getRandomSoldState())); } return list; } private String getRandomId() { return UUID.randomUUID().toString().substring(0, 8); } private int getRandomYear() { return (int) (Math.random() * 50 + 1960); } private String getRandomColor() { return colors[(int) (Math.random() * 10)]; } private String getRandomBrand() { return brands[(int) (Math.random() * 10)]; } public int getRandomPrice() { return (int) (Math.random() * 100000); } public boolean getRandomSoldState() { return (Math.random() > 0.5) ? true: false; } public List<String> getColors() { return Arrays.asList(colors); } public List<String> getBrands() { return Arrays.asList(brands); } }