Property not readable on type java.lang.String when using JSF PrimeFaces

java jsf jsf-2 primefaces

10,978

The model class, in this case Car has to be public.

10,978

Author by

mvg

Passionate Java programmer, interested in Big Data applications.

Updated on June 08, 2022

Comments

mvg almost 2 years

I am trying to implement lazy loading data in data table using the demo code in the site

PrimeFaces Lazy loading

and I am getting the error

javax.el.PropertyNotFoundException: /table.xhtml @14,49 value="#{car.year}": Property 'year' not readable on type java.lang.String

Here is my table.xhtml code

<html xmlns="http://www.w3.org/1999/xhtml"
  xmlns:h="http://java.sun.com/jsf/html"
  xmlns:f="http://java.sun.com/jsf/core"
  xmlns:ui="http://java.sun.com/jsf/facelets"
  xmlns:p="http://primefaces.org/ui">

    <h:form id="form">  

<p:dataTable var="car" value="#{tableBean.lazyModel}" paginator="true" rows="10"  
              id="carTable" lazy="true">  

    <p:column headerText="Year" sortBy="year" filterBy="#{car.year}">  
        <h:outputText value="#{car.year}" />  
    </p:column>  

    <p:column headerText="Color" sortBy="color" filterBy="#{car.color}">  
        <h:outputText value="#{car.color}" />  
    </p:column>  
</p:dataTable>

TableBean code

@ManagedBean
public class TableBean {  

private LazyDataModel<Car> lazyModel;  

private List<Car> cars;

public TableBean() {
    System.out.println("Girish");
    cars = populateRandomCars(50);
    lazyModel = new LazyCarDataModel(cars);
    lazyModel.setRowCount(10);
}

public LazyDataModel<Car> getLazyModel() {
    return lazyModel;
}

public void setLazyModel(LazyDataModel<Car> lazyModel) {
    this.lazyModel = lazyModel;
}

public List<Car> getCars() {
    return cars;
}

public void setCars(List<Car> cars) {
    this.cars = cars;
}

private List<Car> populateRandomCars( int size) {
    List<Car> list = new ArrayList<Car>();
    Car car = null;
    for(int i = 0 ; i < size ; i++) {
        car = new Car();
        car.setColor("color "+i);
        car.setYear(""+i);
        list.add(car);  
    }

    return list;
}  
}

Car code

class Car {
private String year;
private String color;



public String getYear() {
    return year;
}
public void setYear(String year) {
    this.year = year;
}
public String getColor() {
    return color;
}
public void setColor(String color) {
    this.color = color;
}
}

and LazyCarDataModel code

public class LazyCarDataModel extends LazyDataModel<Car> {  

/**
 * 
 */
private static final long serialVersionUID = 1L;
private List<Car> datasource;  

public LazyCarDataModel(List<Car> datasource) {  
    this.datasource = datasource;  
}  

@Override  
public Car getRowData(String rowKey) {  

    return new Car();  
}  

@Override  
public Object getRowKey(Car car) {  
    return car.getYear();  
}  

@Override  
public List<Car> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String,String> filters) {  
    List<Car> data = new ArrayList<Car>();  

    //filter  
    for(Car car : datasource) {  
        boolean match = true;  

        for(Iterator<String> it = filters.keySet().iterator(); it.hasNext();) {  
            try {  
                String filterProperty = it.next();  
                String filterValue = filters.get(filterProperty);  
                String fieldValue = String.valueOf(car.getClass().getField(filterProperty).get(car));  

                if(filterValue == null || fieldValue.startsWith(filterValue)) {  
                    match = true;  
                }  
                else {  
                    match = false;  
                    break;  
                }  
            } catch(Exception e) {  
                match = false;  
            }   
        }  

        if(match) {  
            data.add(car);  
        }  
    }  


    //rowCount  
    int dataSize = data.size();  
    this.setRowCount(dataSize);  

    //paginate  
    if(dataSize > pageSize) {  
        try {  
            return data.subList(first, first + pageSize);  
        }  
        catch(IndexOutOfBoundsException e) {  
            return data.subList(first, first + (dataSize % pageSize));  
        }  
    }  
    else {  
        return data;  
    }  
}  
}

Please help.

Thanks in advance.

moldovean over 7 years

I was having a similar problem with tabledata tag. thanks
Ross Llewallyn over 6 years

This was the solution to my problem, and something that could be easily overlooked if you're going over getters, setters, and the syntax in the view.