5
मैं यह पता लगाने की कोशिश कर रहा हूं कि जीडब्ल्यूटी में ऑटोबीन का उपयोग करके सूची को क्रमबद्ध कैसे करें, लेकिन मुझे एक नल पॉइंटर अपवाद मिल रहा है।ऑटोबीन (जीडब्ल्यूटी) में एक सूची को क्रमबद्ध करने के लिए कैसे?
GuideCreatorFactory beanFactory = AutoBeanFactorySource.create(GuideCreatorFactory.class);
List<Guide> guides = new LinkedList<Guide>();
Guide guide = new Guide();
guide.setText("this is the text");
guide.setTitle("this is the title");
guides.add(guide);
GuideCreatorList<Guide> impl = new GuideCreatorListImpl();
impl.setGuides(guides);
System.out.println("Serializing the given parameter to JSON");
// Fails on the below lines w/ NPE
AutoBean<GuideCreatorList> bean = beanFactory.create(GuideCreatorList.class, impl);
String json = AutoBeanCodex.encode(bean).getPayload();
System.out.println("guides as json: " + json);
किसी को भी मदद कर सकते हैं सही दिशा में मुझे बिंदु:
यहाँ मैं क्या है क्या है? आपका बहुत बहुत धन्यवाद।
public interface GuideCreatorFactory extends AutoBeanFactory {
AutoBean<GuideCreator> createGuide();
AutoBean<GuideCreatorList> createGuideList();
}
public interface GuideCreator {
public String getText();
public void setText(String text);
public String getTitle();
public void setTitle(String title);
}
public interface GuideCreatorList<T extends GuideCreator> {
public List<T> getGuides();
public void setGuides(List<T> guides);
}
class GuideCreatorListImpl implements GuideCreatorList<Guide> {
private List<Guide> guides;
public GuideCreatorListImpl() {
}
@Override
public List<Guide> getGuides() {
return guides;
}
@Override
public void setGuides(List<Guide> guides) {
this.guides = guides;
}
};
यहाँ है एनपीई:
यहाँ समर्थन वर्गों और इंटरफेस है
java.lang.NullPointerException
at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl.doEncode(AutoBeanCodexImpl.java:558)
at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl$ObjectCoder.encode(AutoBeanCodexImpl.java:321)
at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl$CollectionCoder.encode(AutoBeanCodexImpl.java:163)
at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl$PropertyGetter.encodeProperty(AutoBeanCodexImpl.java:413)
at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl$PropertyGetter.visitReferenceProperty(AutoBeanCodexImpl.java:389)
at com.google.web.bindery.autobean.shared.AutoBeanVisitor.visitCollectionProperty(AutoBeanVisitor.java:229)
at com.google.web.bindery.autobean.vm.impl.ProxyAutoBean.traverseProperties(ProxyAutoBean.java:300)
at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.traverse(AbstractAutoBean.java:166)
at com.google.web.bindery.autobean.shared.impl.AbstractAutoBean.accept(AbstractAutoBean.java:101)
at com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl.doEncode(AutoBeanCodexImpl.java:558)
at com.google.web.bindery.autobean.shared.AutoBeanCodex.encode(AutoBeanCodex.java:83)
at com.districthp.core.ui.client.review.JsonSerializationText.testMyObject(JsonSerializationText.java:82)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
क्या आप एनपीई का पूरा स्टैकट्रैक दे सकते हैं? –
मैंने स्टैक ट्रेस जोड़ा ... धन्यवाद। – Cuga