FacesConverter forClass不适用于Composite Componet

时间:2012-11-01 13:16:25

标签: jsf-2 converter composite-component

我有一个简单的复合组件,它必须渲染一个inputText。当一个put值并按下commandButton后跟随异常就是throw:

java.lang.IllegalArgumentException: Cannot convert 1 of type class java.lang.String to class sample.entity.Product

当我使用h:inputText代替d:myInputText时,它可以正常工作。

是否可以为复合组件使用FacesConverter和属性forClass?我不喜欢使用标签f:converter的converter属性或converterId。 有人帮帮我吗?

网页代码:

<h:form>
  <h:messages />
  Product Id: <h:myInputText value="#{productController.product}"/>
  <h:commandButton value="Submit" action="#{productController.someAction()}" />
  Product Description: <h:outputText value="#{productController.product.description}"/>
</h:form>

复合代码:

<composite:interface>
   <composite:attribute name="value"/>
   <composite:editableValueHolder name="value" targets="#{cc.clientId}:value"/>
</composite:interface>

<composite:implementation>
   <div id="#{cc.clientId}">
      <h:inputText id="value" value="#{cc.attrs.value}"/>
      <h:message for="#{cc.clientId}:value" />
    </div>
</composite:implementation>

ManagedBean代码:

@Named("productController")
@RequestScoped
public class ProductController {

  private Product product;

  public Product getProduct() {
    if (product == null) {
        product = new Product();
    }
    return product;
  }

  public void setProduct(Product product) {
    this.product = product;
  }

  public void someAction() {
    System.out.println("Product " + product);
  }
}

转换器代码:

@FacesConverter(forClass = Product.class)
public class ProductConverter implements Converter {

  @Override
  public Object getAsObject(FacesContext fc, UIComponent uic, String value) {
    System.out.println("[DEBUG] getAsObject: " + value);
    if (value == null || "".equals(value)) {
        return null;
    }
    //TODO: some logic to get entity from database.
    return new Product(new Long(value));
  }

  @Override
  public String getAsString(FacesContext fc, UIComponent uic, Object o) {
    System.out.println("[DEBUG] getAsString: " + o);
    if (o == null) {
        return null;
    }
    return String.valueOf(((Product) o).getId());
  }
}

实体代码:

 public class Product {

      private Long id;
      private String description;

      public Product() {
      }

  public Product(Long id) {
    this.id = id;
  }

  public Long getId() {
    return id;
  }

  public void setId(Long id) {
    this.id = id;
  }

  public String getDescription() {
    return description;
  }

  public void setDescription(String description) {
    this.description = description;
  }

  @Override
  public int hashCode() {
    int hash = 7;
    hash = 29 * hash + (this.id != null ? this.id.hashCode() : 0);
    return hash;
  }

  @Override
  public boolean equals(Object obj) {
    if (obj == null) {
        return false;
    }
    if (getClass() != obj.getClass()) {
        return false;
    }
    final Product other = (Product) obj;
    if (this.id != other.id && (this.id == null || !this.id.equals(other.id))) {
        return false;
    }
    return true;
  }

  @Override
  public String toString() {
    return "Product{" + "id=" + id + '}';
  }
}

我使用Mojarra 2.1.14,Glassfish 3.1和CDI。 最好的问候。

1 个答案:

答案 0 :(得分:2)

我能够在Mojarra 2.1.14中重现它。这是Mojarra的一个错误。它在MyFaces 2.1.9中运行良好。我已经向Mojarra家伙报告了issue 2568。与此同时,除了明确指定客户端中的<f:converter for>或移动到MyFaces(其中也有自己的一组特定怪癖/问题)之外,没有其他选择。