阅读本文档,我尝试以这种方式应用于我的代码:
三倍
@Entity
@Table(name = "triple")
@NodeEntity
public class TripleDBMoldelNeoImpl implements TripleDBModel{
protected List<Annotation> annotations;
@RelatedTo(type = "subject", elementClass = (Class<? extends NodeBacked>) Concept.class) //This is the suggestion Eclipse gives me
public Concept subject;
@RelatedTo(type = "object", elementClass = Concept.class)
public Concept object;
@RelatedTo(type = "predicate", elementClass = Concept.class)
public Concept predicate;
@ManyToMany(
cascade={CascadeType.ALL },
fetch=FetchType.LAZY
)
@JoinTable(name = "triple_has_annotation",
joinColumns={@JoinColumn(name="uri_concept_subject"), @JoinColumn(name="uri_concept_object"), @JoinColumn(name="uri_concept_predicate") },
inverseJoinColumns=@JoinColumn(name="annotation_id") )
public List<Annotation> getAnnotations() {
return annotations;
}
public void setAnnotations(List<Annotation> annotations) {
this.annotations = annotations;
}
@Id
@Column(name = "subject", length = 100)
public Concept getSubject() {
return subject;
}
public void setSubject(Concept subject) {
this.subject = subject;
}
@Id
@Column(name = "object", length = 100)
public Concept getObject() {
return object;
}
public void setObject(Concept object) {
this.object = object;
}
@Id
@Column(name = "predicate", length = 100)
public Concept getPredicate() {
return predicate;
}
public void setPredicate(Concept predicate) {
this.predicate = predicate;
}
概念
@NodeEntity(partial = true)
public class ConceptNeoImpl implements java.io.Serializable, Concept {
private static final long serialVersionUID = 1L;
private String uri;
private String label;
private String ontologyElement;
private List<Annotation> annotations;
@RelatedTo(type = "conceptSub", elementClass = TripleDBModel.class)
private TripleDBModel triple;
public TripleDBModel getTriple() {
return triple;
}
public void setTriple(TripleDBModel triple) {
this.triple = triple;
}
下图解释了我想要的用途
然后,表三元组将使用 neo4j,concept 将使用 jpa 和 neo4j。我正在使用 Eclipse IDE 进行编程,它给了我纠正错误的建议。第一个是:
@RelatedTo(type = "conceptUriSubject", elementClass = Concept.class)
正确到
@RelatedTo(type = "conceptUriSubject", elementClass = (Class<? extends NodeBacked>) Concept.class)
然后,问题没有解决,并给了我下一个消息
此行有多个标记 - 注释属性 RelatedTo.elementClass 的值必须是类文字 - 类型安全:从 Class 到 Class NodeBacked 的未经检查的强制转换> - 注释属性 RelatedTo.elementClass 的值必须是类文字 - 类型安全:未经检查从类转换为类 NodeBacked>
任何想法¿¿我对此很陌生,所以我很迷茫,我已经在春季论坛上问过,但没有成功。提前致谢
编辑
我的插件pom.xml
<plugins>
<plugin>
<!-- Execute the main class -->
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>exec</goal>
</goals>
</execution>
</executions>
<configuration>
<mainClass>org.springframework.data.neo4j.examples.hellograph.App</mainClass>
</configuration>
</plugin>
<plugin>
<!-- IntelliJ Idea Support -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-idea-plugin</artifactId>
<version>2.2</version>
<configuration>
<downloadSources>true</downloadSources>
<dependenciesAsLibraries>true</dependenciesAsLibraries>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<version>1.0</version>
<dependencies>
<!-- NB: You must use Maven 2.0.9 or above or these are ignored (see
MNG-2972) -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjtools</artifactId>
<version>${aspectj.version}</version>
</dependency>
</dependencies>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
<configuration>
<outxml>true</outxml>
<aspectLibraries>
<aspectLibrary>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
</aspectLibrary>
<aspectLibrary>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
</aspectLibrary>
</aspectLibraries>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
</plugins>
安装在eclipse中的软件