IllegalArgumentException Cannot convert value of type String to required type Product

[despot]

Hi to all,

I receive the exception

Failed to convert property value of type [java.lang.String] to required type [beans.Product] for property product; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [java.lang.String] to required type [beans.Product] for property product: no matching editors or conversion strategy found

in the Errors errors object even before my DetailProductValidator starts validating.

I don't understand why Spring does that. I don't have any input field that is mapped directly to the product property/object. I just use the product object's properties in the jsp. For example, I use:

<form:options items="${dpBackObj.product.colorMap}"/>
<!-- or -->
${dpBackObj.product.priceInDollars}

but I never use:

<form:input path="product"/>

Can anyone please explain why this happens? And maybe inform me of a simple solution?

The bean configuration for the controller is:

	<!-- DETAIL PRODUCT FORM CONTROLLER -->
<bean id="productDetailFormController" name="/detail.htm /addToCart.htm" 
		class="detailProduct.DetailProductFormController">
	<property name="sessionForm" value="true" />
	<property name="commandName" value="dpBackObj" />
	<property name="commandClass" value="detailProduct.DetailProductBackingObject" />
	<property name="validator">
		<bean class="detailProduct.DetailProductValidator" />
	</property>
	<property name="formView" value="detail" />
	<property name="successView" value="redirect:/viewCart.htm" />
	<property name="cartService" ref="cartServiceImpl"/>
</bean>

The backing object for the DetailProductFormController is:

public class DetailProductBackingObject {
	private String quantityOverflowError;
	private Product product;
	private int quantity;
	private ShoppingCart shoppingCart;
	private long sizeId;
	private long colorId;
	public DetailProductBackingObject() {
		this.product = new Product();
		this.sizeId = -1;
		this.colorId = -1;
	}
	//getters and setters
}

If you need some other info, I will provide. I also use Spring 2.5.5.

Kind Regards,
Despot

[despot]

The answer is here.

Regards.