Error setting expression X with value [Ljava.lang.String;@......]

Question

I am getting sometimes and sometimes not weird error:

Error setting expression X with value [Ljava.lang.String;@......]

It sometimes occurs and sometimes not. It is quiet annoying. The error sometimes comes from this class:

package com.coreRestaurant.menuItem;

import com.google.gson.Gson;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class MenuItemAction extends ActionSupport implements ModelDriven<MenuItem>{

    private MenuItem menuItem = new MenuItem();
    private final String DATABASE_PROBLEMS = "Error code : Database problems";
    private String json;

    public String execute(){
        MenuItemService itemService = new MenuItemService();
        if(itemService.testDatabaseConnectionU()){
        setJson(new Gson().toJson(itemService.getMenuItemsByMenuId(menuItem.getMenuId()) ));
        }else{
            setErrorToBeSentBackToClientSide(DATABASE_PROBLEMS);
        }
        return SUCCESS;
    }

    @Override
    public MenuItem getModel() {
        return menuItem;
    }

    public String getJson() {
        return json;
    }

    public void setJson(String json) {
        this.json = json;
    }

    private void setErrorToBeSentBackToClientSide(String error){

        String errorCode = error;
        setJson(new Gson().toJson(errorCode));

    }
}

And then MenuItem class:

package com.coreRestaurant.menuItem;

public class MenuItem {

    private String name;
    private double price;
    private int menuId;

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public double getPrice() {
        return price;
    }
    public void setPrice(double price) {
        this.price = price;
    }
    public int getMenuId() {
        return menuId;
    }
    public void setMenuId(int menuId) {
        this.menuId = menuId;
    }
    public void setMenuId(MenuItem fromJson) {
        setName(fromJson.getName());
        setPrice(fromJson.getPrice());

    }
}

And I am calling those things from PHP file (the two lines do that, but the second one is a worrychild):

 $specificMenuJson = file_get_contents('http://localhost:8080/Core/read?id=' . $menuId);
 $specificMenuItemsJson = file_get_contents('http://localhost:8080/Core/readMenuItemById?menuId=' . $menuId);

It has problem setting the value of menuId, but I have getters and setters included. I don't know why it sometimes fails to do that. Any suggestions?

Answer 1

Try to change the name of the method setMenuId

public void fromJsonMenuId(MenuItem fromJson) {
    setName(fromJson.getName());
    setPrice(fromJson.getPrice());
}