我想将DynamicEntity用作提供我的xhtml表单属性的托管bean。
当我将上述内容用作我的xhtml页面的支持bean时,出现以下异常:
The class 'com.invoice.Invoic' does not have the property 'sellerAddress'.
com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:111)
javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)
javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182)
javax.faces.component.UIOutput.getValue(UIOutput.java:169)
com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:205)
com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:355)
com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:164)
javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:1786)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:402)
com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:125)
javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:288)
org.ocpsoft.rewrite.faces.RewriteViewHandler.renderView(RewriteViewHandler.java:186)
javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:288)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
org.ocpsoft.rewrite.servlet.RewriteFilter.doFilter(RewriteFilter.java:200)
com.tsystems.odx.idm.authentication.web.AuthenticationFilter.doFilter(AuthenticationFilter.java:231)
org.ocpsoft.rewrite.servlet.impl.HttpRewriteResultHandler.handleResult(HttpRewriteResultHandler.java:38)
org.ocpsoft.rewrite.servlet.RewriteFilter.rewrite(RewriteFilter.java:263)
org.ocpsoft.rewrite.servlet.RewriteFilter.doFilter(RewriteFilter.java:188)
com.tsystems.odx.idm.authentication.web.AuthenticationFilter.doFilter(AuthenticationFilter
我放置了一个调试断点,并查看了我的DynamicEntity对象,那里是SellerAddress对象。
这是一个虚拟的示例,我想如何将DynamicEntity用作bean
package com.test.beans;
import java.io.InputStream;
import javax.annotation.PostConstruct;
import javax.enterprise.inject.Produces;
import javax.faces.bean.ViewScoped;
import javax.inject.Named;
import javax.xml.bind.JAXBException;
import org.eclipse.persistence.dynamic.DynamicEntity;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContextFactory;
@Named
@ViewScoped
public class CustomerHandler {
DynamicJAXBContext jaxbContext;
@PostConstruct
public void init() throws JAXBException {
InputStream xsdInputStream = getClass().getClassLoader().getResourceAsStream("customer.xsd");
jaxbContext = DynamicJAXBContextFactory.createContextFromXSD(xsdInputStream, null, null,
null);
}
@Produces
@Named("Customer")
public DynamicEntity createCustomer() {
DynamicEntity customer = jaxbContext.newDynamicEntity("org.example.Customer");
customer.set("name", "Jane Doe");
DynamicEntity address = jaxbContext.newDynamicEntity("org.example.Address");
address.set("street", "1 Any Street").set("city", "Any Town");
customer.set("address", address);
return customer;
}
public void save()
{
// do something
}
}
customer.xsd文件位于src / main / resources中
<xsd:schema
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns="http://www.example.org"
targetNamespace="http://www.example.org"
elementFormDefault="qualified">
<xsd:complexType name="address">
<xsd:sequence>
<xsd:element name="street" type="xsd:string" minOccurs="0"/>
<xsd:element name="city" type="xsd:string" minOccurs="0"/>
</xsd:sequence>
</xsd:complexType>
<xsd:element name="customer">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="name" type="xsd:string" minOccurs="0"/>
<xsd:element name="address" type="address" minOccurs="0"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>
我的测试页是customer.xhtml
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets">
<h:head>
<title>Welcome to Customer Page</title>
</h:head>
<h:body>
<h:form>
<h:inputText value="#{Customer.name}" />
<h:inputText value="#{Customer.address.street}" />
<h:commandButton value="Submit" action="#{customerHandler.save()}" />
</h:form>
</h:body>
</html>
DynamicEntity
类的文档向我们展示了这是一个接口,并且无处说明该接口提供了像DynamicEntity
这样的老旧POJO吸气剂,它将返回所需的属性。当您尝试将值作为getSellerAddress()
操纵时,实际上并没有用,因为没有#{Customer.name}
/ getName()
方法对。
setName()
接口公开的方法如下:
DynamicEntity
检索值和DynamicEntity#get(propertyName)
预设值。因此,显然没有办法使用这些方法以标准JSF方式创建具有bean属性的双边绑定。
您有以下选择来解决您的问题:
DynamicEntity#set(propertyName, value)
之类的真实实体作为您的模型。显然,这是更进一步的最佳方法和最佳实践;@Entity public class Customer
的实现(即,从对DynamicEntity
的调用返回的实例)由DynamicJAXBContext#newDynamicEntity(String n)
的实现支持。调试以查看该调用返回的内容,并将该信息应用于您的用例。如果它由带有名称为Map
的公共getter / setter对的地图支持,则您的EL将变为persistentMap
。请注意,这是不鼓励的做法,并且是紧密耦合的一个示例,如果有用于后备集合的访问器,则可以这样做。总而言之,强烈建议切换到JPA来解决您的用例。