在沒有sparql的情況下檢索對象的謂詞和謂詞

Question

我使用getSubject()通過模型檢索了主題，為此主題我想為其各自的對象和謂詞創建一個關系。 如何在沒有sparql的情況下通過耶拿檢索對象並為特定主題斷言？

Answer 1

要獲得給定模型m的特定主題的所有謂詞和賓語：

// The resource you already had:
Resource subject; // = m.getResource(NAMESPACE + "subject");

// This creates a 'list' (iterator) over all the satements containing your subject
StmtIterator stmtIterator = m.listStatements(subject, null, (RDFNode) null);

// While you have not processed all these statements:
while (stmtIterator.hasNext()){

     // Grab the next statement
     Statement s = stmtIterator.next();

     // Retrieve the predicate(property) and the object from the statement
     Property predicate = s.getPredicate();
     Resource object = s.getObject();

     // Do something with your predicate
     // Do something with your object
}

但是，如果您要從模型中獲取一個謂詞和一個主題，以將其添加到檢索到的主題中，則：

Property property = m.getProperty(NAMESPACE + "propertyName");
Resource object = m.getResource(NAMESPACE + "objectName");
subject.addProperty(property, object);