HibernateEntityValueEncoder NullPointerException
Я использую инфраструктуру CRUD под названием Tynamo, которая, в свою очередь, опирается на Apache Tapestry и Hibernate. Все это прекрасно работает, за исключением случая, когда я пытаюсь использовать его для CRUD на таблице с составным / составным первичным ключом.
Я решил не идти @EmbeddedId маршрут, так как он, кажется, не работает вообще с рамками. Это, как говорится, я использовал @IdClass метод, который в основном работает; Я думаю, что я один или два кода кода от успеха.
Проблема в том, что когда он начинает использовать отражение для построения объектов, он взрывается и говорит: org.apache.tapestry5.ioc.internal.util.TapestryException, вызванный java.lang.NullPointerException at org.apache.tapestry5.internal.hibernate.HibernateEntityValueEncoder.<init>(HibernateEntityValueEncoder.java:51),
Я, честно говоря, понятия не имею, в чем здесь дело, но, поскольку у меня нормальная операция CRUD с таблицами, работающая для многих других таблиц, я бы предположил, что это как-то связано с этой таблицей с использованием составного / составного первичного ключа.
Я попробовал переместить статический внутренний класс в свой собственный пакет и удалить static модификатор класса, но произошла точно такая же ошибка.
Вы можете увидеть мой класс ниже:
package com.company.crud.entities;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.IdClass;
import com.company.crud.entities.TransferExtension.TransferExtensionPK;
@Entity(name = "Transfer_Extensions")
@IdClass(TransferExtensionPK.class)
public class TransferExtension implements Serializable {
private static final long serialVersionUID = 1L;
@Id
// @NotNull(message = "Please supply a Script Code")
// @Length(min = 3, max = 4)
@Column(name = "Division", nullable = false)
private String scriptCode;
@Id
// @NotNull(message = "Please supply a Transfer Type")
// @Length(min = 3, max = 6)
@Column(name = "Transfer_Type", nullable = false)
private String transferType;
@Column(name = "Extension", nullable = true)
private String englishExtension;
@Column(name = "Span_Extension", nullable = true)
private String spanishExtension;
@Column(name = "Call_Type", nullable = true)
private String callType;
@Column(name = "Call_Center", nullable = true)
private String callCenter;
public TransferExtension() {
}
public TransferExtension(String scriptCode, String transferType,
String englishExtension, String spanishExtension, String callType,
String callCenter) {
this.callCenter = callCenter;
this.callType = callType;
this.englishExtension = englishExtension;
this.scriptCode = scriptCode;
this.spanishExtension = spanishExtension;
this.transferType = transferType;
}
public String getScriptCode() {
return this.scriptCode;
}
public void setScriptCode(String scriptCode) {
this.scriptCode = scriptCode;
}
public String getTransferType() {
return this.transferType;
}
public void setTransferType(String transferType) {
this.transferType = transferType;
}
public String getEnglishExtension() {
return this.englishExtension;
}
public void setEnglishExtension(String englishExtension) {
this.englishExtension = englishExtension;
}
public String getSpanishExtension() {
return this.spanishExtension;
}
public void setSpanishExtension(String spanishExtension) {
this.spanishExtension = spanishExtension;
}
public String getCallType() {
return this.callType;
}
public void setCallType(String callType) {
this.callType = callType;
}
public String getCallCenter() {
return this.callCenter;
}
public void setCallCenter(String callCenter) {
this.callCenter = callCenter;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("TransferExtension [scriptCode=")
.append(this.scriptCode).append(", transferType=")
.append(this.transferType).append(", englishExtension=")
.append(this.englishExtension).append(", spanishExtension=")
.append(this.spanishExtension).append(", callType=")
.append(this.callType).append(", callCenter=")
.append(this.callCenter).append("]");
return builder.toString();
}
public static class TransferExtensionPK implements Serializable {
private static final long serialVersionUID = 4L;
private String scriptCode;
private String transferType;
public TransferExtensionPK() {
}
public TransferExtensionPK(String scriptCode, String transferType) {
this.scriptCode = scriptCode;
this.transferType = transferType;
}
public String getScriptCode() {
return this.scriptCode;
}
public void setScriptCode(String scriptCode) {
this.scriptCode = scriptCode;
}
public String getTransferType() {
return this.transferType;
}
public void setTransferType(String transferType) {
this.transferType = transferType;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("TransferExtensionPK [scriptCode=")
.append(this.scriptCode).append(", transferType=")
.append(this.transferType).append("]");
return builder.toString();
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime
* result
+ ((this.scriptCode == null) ? 0 : this.scriptCode
.hashCode());
result = prime
* result
+ ((this.transferType == null) ? 0 : this.transferType
.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (!(obj instanceof TransferExtensionPK)) {
return false;
}
TransferExtensionPK other = (TransferExtensionPK) obj;
if (this.scriptCode == null) {
if (other.scriptCode != null) {
return false;
}
} else if (!this.scriptCode.equals(other.scriptCode)) {
return false;
}
if (this.transferType == null) {
if (other.transferType != null) {
return false;
}
} else if (!this.transferType.equals(other.transferType)) {
return false;
}
return true;
}
}
}
И трассировка стека:
Hibernate:
select
count(*) as y0_
from
Transfer_Extensions this_
Hibernate:
select
top 25 this_.Division as Division1_0_,
this_.Transfer_Type as Transfer2_1_0_,
this_.Call_Center as Call3_1_0_,
this_.Call_Type as Call4_1_0_,
this_.Extension as Extension1_0_,
this_.Span_Extension as Span6_1_0_
from
Transfer_Extensions this_
[ERROR] pages.List Render queue error in BeginRender[List:pagelink_0]: org.apache.tapestry5.ioc.internal.util.TapestryException
org.apache.tapestry5.ioc.internal.util.TapestryException [at context:List.tml, line 16]
at org.apache.tapestry5.internal.structure.ComponentPageElementImpl$AbstractPhase.invoke(ComponentPageElementImpl.java:158)
at org.apache.tapestry5.internal.structure.ComponentPageElementImpl$BeginRenderPhase.render(ComponentPageElementImpl.java:214)
at org.apache.tapestry5.internal.services.RenderQueueImpl.run(RenderQueueImpl.java:72)
at org.apache.tapestry5.internal.services.PageRenderQueueImpl.render(PageRenderQueueImpl.java:124)
at $PageRenderQueue_11b9cd02019b.render(Unknown Source)
at $PageRenderQueue_11b9cd02019a.render(Unknown Source)
at org.apache.tapestry5.internal.services.MarkupRendererTerminator.renderMarkup(MarkupRendererTerminator.java:37)
at org.apache.tapestry5.services.TapestryModule$31.renderMarkup(TapestryModule.java:1994)
at $MarkupRenderer_11b9cd02019e.renderMarkup(Unknown Source)
at org.apache.tapestry5.services.TapestryModule$30.renderMarkup(TapestryModule.java:1978)
at $MarkupRenderer_11b9cd02019e.renderMarkup(Unknown Source)
at org.apache.tapestry5.services.TapestryModule$29.renderMarkup(TapestryModule.java:1960)
at $MarkupRenderer_11b9cd02019e.renderMarkup(Unknown Source)
at org.apache.tapestry5.services.TapestryModule$28.renderMarkup(TapestryModule.java:1945)
at $MarkupRenderer_11b9cd02019e.renderMarkup(Unknown Source)
at org.apache.tapestry5.services.TapestryModule$27.renderMarkup(TapestryModule.java:1931)
at $MarkupRenderer_11b9cd02019e.renderMarkup(Unknown Source)
at org.apache.tapestry5.services.TapestryModule$26.renderMarkup(TapestryModule.java:1913)
at $MarkupRenderer_11b9cd02019e.renderMarkup(Unknown Source)
at org.apache.tapestry5.services.TapestryModule$25.renderMarkup(TapestryModule.java:1894)
at $MarkupRenderer_11b9cd02019e.renderMarkup(Unknown Source)
at $MarkupRenderer_11b9cd020199.renderMarkup(Unknown Source)
at org.apache.tapestry5.internal.services.PageMarkupRendererImpl.renderPageMarkup(PageMarkupRendererImpl.java:47)
at $PageMarkupRenderer_11b9cd020192.renderPageMarkup(Unknown Source)
at org.apache.tapestry5.internal.services.PageResponseRendererImpl.renderPageResponse(PageResponseRendererImpl.java:67)
at $PageResponseRenderer_11b9cd020194.advised$renderPageResponse_11b9cd020196(Unknown Source)
at $PageResponseRenderer_11b9cd020194$Invocation_renderPageResponse_11b9cd020195.proceedToAdvisedMethod(Unknown Source)
at org.apache.tapestry5.internal.plastic.AbstractMethodInvocation.proceed(AbstractMethodInvocation.java:84)
at org.tynamo.services.TynamoCoreModule$2.advise(TynamoCoreModule.java:353)
at org.apache.tapestry5.internal.plastic.AbstractMethodInvocation.proceed(AbstractMethodInvocation.java:86)
at $PageResponseRenderer_11b9cd020194.renderPageResponse(Unknown Source)
at $PageResponseRenderer_11b9cd020189.renderPageResponse(Unknown Source)
at org.apache.tapestry5.internal.services.PageRenderRequestHandlerImpl.handle(PageRenderRequestHandlerImpl.java:64)
at org.apache.tapestry5.services.TapestryModule$38.handle(TapestryModule.java:2222)
at $PageRenderRequestHandler_11b9cd02018b.handle(Unknown Source)
at $PageRenderRequestHandler_11b9cd020186.handle(Unknown Source)
at org.apache.tapestry5.internal.services.ComponentRequestHandlerTerminator.handlePageRender(ComponentRequestHandlerTerminator.java:48)
at org.apache.tapestry5.services.InitializeActivePageName.handlePageRender(InitializeActivePageName.java:47)
at $ComponentRequestHandler_11b9cd020187.handlePageRender(Unknown Source)
at $ComponentRequestHandler_11b9cd020080.handlePageRender(Unknown Source)
at org.tynamo.routing.services.RouterDispatcher.dispatch(RouterDispatcher.java:26)
at $Dispatcher_11b9cd020084.dispatch(Unknown Source)
at $Dispatcher_11b9cd02007d.dispatch(Unknown Source)
at org.apache.tapestry5.services.TapestryModule$RequestHandlerTerminator.service(TapestryModule.java:302)
at org.apache.tapestry5.internal.services.RequestErrorFilter.service(RequestErrorFilter.java:26)
at $RequestHandler_11b9cd02007e.service(Unknown Source)
at org.apache.tapestry5.services.TapestryModule$3.service(TapestryModule.java:902)
at $RequestHandler_11b9cd02007e.service(Unknown Source)
at org.apache.tapestry5.services.TapestryModule$2.service(TapestryModule.java:892)
at $RequestHandler_11b9cd02007e.service(Unknown Source)
at org.apache.tapestry5.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:90)
at $RequestHandler_11b9cd02007e.service(Unknown Source)
at org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:105)
at org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:95)
at org.apache.tapestry5.ioc.internal.util.ConcurrentBarrier.withRead(ConcurrentBarrier.java:85)
at org.apache.tapestry5.internal.services.CheckForUpdatesFilter.service(CheckForUpdatesFilter.java:119)
at $RequestHandler_11b9cd02007e.service(Unknown Source)
at $RequestHandler_11b9cd020072.service(Unknown Source)
at org.apache.tapestry5.services.TapestryModule$HttpServletRequestHandlerTerminator.service(TapestryModule.java:253)
at org.apache.tapestry5.internal.gzip.GZipFilter.service(GZipFilter.java:53)
at $HttpServletRequestHandler_11b9cd020074.service(Unknown Source)
at org.apache.tapestry5.upload.internal.services.MultipartServletRequestFilter.service(MultipartServletRequestFilter.java:44)
at $HttpServletRequestHandler_11b9cd020074.service(Unknown Source)
at org.apache.tapestry5.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62)
at $HttpServletRequestFilter_11b9cd020070.service(Unknown Source)
at $HttpServletRequestHandler_11b9cd020074.service(Unknown Source)
at org.apache.tapestry5.services.TapestryModule$1.service(TapestryModule.java:852)
at $HttpServletRequestHandler_11b9cd020074.service(Unknown Source)
at $HttpServletRequestHandler_11b9cd02006e.service(Unknown Source)
at org.apache.tapestry5.TapestryFilter.doFilter(TapestryFilter.java:171)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1476)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:370)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.NullPointerException
at org.apache.tapestry5.internal.hibernate.HibernateEntityValueEncoder.<init>(HibernateEntityValueEncoder.java:51)
at org.apache.tapestry5.hibernate.HibernateModule$1.create(HibernateModule.java:103)
at org.apache.tapestry5.internal.services.ValueEncoderSourceImpl.getValueEncoder(ValueEncoderSourceImpl.java:48)
at $ValueEncoderSource_11b9cd0200bf.getValueEncoder(Unknown Source)
at org.apache.tapestry5.internal.services.ContextValueEncoderImpl.toClient(ContextValueEncoderImpl.java:35)
at $ContextValueEncoder_11b9cd0200cd.toClient(Unknown Source)
at org.apache.tapestry5.internal.services.ContextPathEncoderImpl.encodeValue(ContextPathEncoderImpl.java:48)
at org.apache.tapestry5.internal.services.ContextPathEncoderImpl.encodeIntoPath(ContextPathEncoderImpl.java:72)
at $ContextPathEncoder_11b9cd02008f.encodeIntoPath(Unknown Source)
at org.apache.tapestry5.internal.services.ComponentEventLinkEncoderImpl.appendContext(ComponentEventLinkEncoderImpl.java:516)
at org.apache.tapestry5.internal.services.ComponentEventLinkEncoderImpl.createPageRenderLink(ComponentEventLinkEncoderImpl.java:103)
at org.apache.tapestry5.internal.services.linktransform.LinkTransformerInterceptor.createPageRenderLink(LinkTransformerInterceptor.java:50)
at $ComponentEventLinkEncoder_11b9cd020082.createPageRenderLink(Unknown Source)
at org.apache.tapestry5.internal.services.LinkSourceImpl.createPageRenderLink(LinkSourceImpl.java:119)
at $LinkSource_11b9cd0200ce.createPageRenderLink(Unknown Source)
at org.apache.tapestry5.internal.structure.ComponentPageElementResourcesImpl.createPageRenderLink(ComponentPageElementResourcesImpl.java:111)
at org.apache.tapestry5.internal.structure.ComponentPageElementImpl.createPageLink(ComponentPageElementImpl.java:1271)
at org.apache.tapestry5.internal.structure.InternalComponentResourcesImpl.createPageLink(InternalComponentResourcesImpl.java:221)
at org.apache.tapestry5.corelib.components.PageLink.beginRender(PageLink.java:57)
at org.apache.tapestry5.corelib.components.PageLink.beginRender(PageLink.java)
at org.apache.tapestry5.internal.structure.ComponentPageElementImpl$BeginRenderPhase.invokeComponent(ComponentPageElementImpl.java:207)
at org.apache.tapestry5.internal.structure.ComponentPageElementImpl$AbstractPhase.invoke(ComponentPageElementImpl.java:138)
... 94 more
Вот мой ValueEncoder учебный класс:
import org.apache.tapestry5.ValueEncoder;
import org.apache.tapestry5.services.ValueEncoderFactory;
import com.company.ivr.crud.entities.TransferExtension.TransferExtensionPK;
public class TransferExtensionPKValueEncoder implements
ValueEncoderFactory<TransferExtensionPK>,
ValueEncoder<TransferExtensionPK> {
public ValueEncoder<TransferExtensionPK> create(
Class<TransferExtensionPK> type) {
return this;
}
public String toClient(TransferExtensionPK value) {
return value.getScriptCode() + ":" + value.getTransferType();
}
public TransferExtensionPK toValue(String clientValue) {
String[] values = clientValue.split(":");
return new TransferExtensionPK(values[0], values[1]);
}
}
Вот AppModule учебный класс:
package com.company.crud.services;
import org.apache.tapestry5.SymbolConstants;
import org.apache.tapestry5.ValueEncoder;
import org.apache.tapestry5.hibernate.HibernateEntityPackageManager;
import org.apache.tapestry5.ioc.Configuration;
import org.apache.tapestry5.ioc.MappedConfiguration;
import org.apache.tapestry5.ioc.ServiceBinder;
import org.apache.tapestry5.ioc.annotations.Contribute;
import org.apache.tapestry5.ioc.services.ApplicationDefaults;
import org.apache.tapestry5.ioc.services.FactoryDefaults;
import org.apache.tapestry5.ioc.services.SymbolProvider;
import org.apache.tapestry5.services.BeanBlockContribution;
import org.apache.tapestry5.services.BeanBlockSource;
import org.apache.tapestry5.services.DisplayBlockContribution;
import org.apache.tapestry5.services.ValueEncoderFactory;
import org.apache.tapestry5.upload.services.UploadSymbols;
import org.tynamo.builder.Builder;
import org.tynamo.builder.BuilderDirector;
import com.company.crud.encoders.TransferExtensionPKValueEncoder;
import com.company.crud.entities.TransferExtension.TransferExtensionPK;
public class AppModule {
/*
* This is the method I've added.
*/
// @Contribute(ValueEncoderSource.class)
public static void contributeValueEncoderSource(
MappedConfiguration<Class<?>, ValueEncoderFactory<?>> config) {
config.addInstance(TransferExtensionPK.class,
TransferExtensionPKValueEncoder.class);
}
public static void bind(ServiceBinder binder) {
}
@Contribute(SymbolProvider.class)
@ApplicationDefaults
public static void provideSymbols(
MappedConfiguration<String, String> configuration) {
configuration.add(SymbolConstants.SUPPORTED_LOCALES, "en, es");
configuration.add(UploadSymbols.REQUESTSIZE_MAX, "2048000");
configuration.add(UploadSymbols.FILESIZE_MAX, "2048000");
}
@Contribute(SymbolProvider.class)
@FactoryDefaults
public static void overrideFactorySymbols(
MappedConfiguration<String, Object> configuration) {
configuration.override(SymbolConstants.APPLICATION_VERSION,
"0.0.1-SNAPSHOT");
}
@Contribute(BeanBlockSource.class)
public static void addCustomBlocks(
Configuration<BeanBlockContribution> configuration) {
configuration.add(new DisplayBlockContribution("boolean",
"blocks/DisplayBlocks", "check"));
configuration.add(new DisplayBlockContribution(
"single-valued-association", "blocks/DisplayBlocks",
"showPageLink"));
configuration.add(new DisplayBlockContribution(
"many-valued-association", "blocks/DisplayBlocks",
"showPageLinks"));
}
@Contribute(HibernateEntityPackageManager.class)
public static void addPackagesToScan(Configuration<String> configuration) {
}
@Contribute(BuilderDirector.class)
public static void addBuilders(
MappedConfiguration<Class<?>, Builder<?>> configuration) {
}
}
2 ответа
Tapestry понадобится ValueEncoder для всех типов первичных ключей, чтобы он мог преобразовать строку клиента в объект servierside. Есть встроенные ValueEncoders для String, Long и т. Д., Поэтому обычно это не проблема. Я предполагаю, что вам нужно будет добавить ValueEncoderFactory в ValueEncoderSource для TransferExtensionPK.
например:
public class TransferExtensionPKValueEncoder implements ValueEncoderFactory<TransferExtensionPK>, ValueEncoder<TransferExtensionPK> {
public ValueEncoder<TransferExtensionPK> create(Class<TransferExtensionPK> type) {
return this;
}
public String toClient(TransferExtensionPK value) {
return value.getScriptCode() + ":" + getTransferType();
}
public TransferExtensionPK toValue(String clientValue) {
String[] values = clientValue.split(":");
return new TransferExtensionPK(values[0], values[1]);
}
}
public class MyModule {
public static void contributeValueEncoderSource(MappedConfiguration<Class, ValueEncoderFactory> config) {
config.addInstance(TransferExtensionPK.class, TransferExtensionPKValueEncoder.class);
}
}
Пожалуйста, сообщите, если это решит проблему, так как в идеале Tapestry-Hibernate должен выдавать более приятное сообщение об исключении.
Hibernate отстой для составных первичных ключей... Я обычно избегаю их всех вместе, и все мои таблицы имеют последовательность, сгенерированную как первичный ключ. Это делает вещи намного проще.
Похоже, встроенный ValueEncoder не совсем подходит для этой составной первичной ключевой сущности. Вы можете легко переопределить ValueEncoder для всей сущности
например:
public class TransferExtensionValueEncoder implements ValueEncoderFactory<TransferExtension>, ValueEncoder<TransferExtension> {
@Inject Session hibernateSession;
public ValueEncoder<TransferExtension> create(Class<TransferExtension> type) {
return this;
}
public String toClient(TransferExtension value) {
return value.getScriptCode() + ":" + getTransferType();
}
public TransferExtension toValue(String clientValue) {
String[] values = clientValue.split(":");
Query query = hibernateSession
.createQuery("from TransferExtension where scriptCode = :scriptCode and transferType = :transferType")
.setParameter("scriptCode", values[0])
.setParameter("transferType", values[1]);
return (TransferExtension) query.uniqueResult();
}
}
public class MyModule {
public static void contributeValueEncoderSource(MappedConfiguration<Class, ValueEncoderFactory> config) {
// use overrideInstance to override the default HibernateEntityValueEncoder just for this one entity
config.overrideInstance(TransferExtension.class, TransferExtensionValueEncoder.class);
}
}