我想使用applet来更改存储库。为此,我编写了以下代码:
LoadOntology:
package owlapi.loader;
import org.semanticweb.owlapi.apibinding.OWLManager;
import org.semanticweb.owlapi.io.*;
import org.semanticweb.owlapi.model.*;
import org.semanticweb.owlapi.util.DefaultPrefixManager;
import org.semanticweb.owlapi.util.OWLEntityRenamer;
import java.io.File;
import java.util.Collections;
import java.util.List;
import java.util.Map;
public class LoadOntology {
private static String ontologyDir = "./owlapi/loader/featurepool.owl";
private static OWLOntology localOntology;
private static OWLOntologyManager manager;
private static OWLDataFactory factory;
private static PrefixManager pm = new DefaultPrefixManager("http://wise.vub.ac.be/Members/lamia/variability/Feature_Assembly/FAM.owl#");
public LoadOntology() {
manager = OWLManager.createOWLOntologyManager();
File file = new File(ontologyDir);
try {
localOntology = manager.loadOntologyFromOntologyDocument(file);
System.out.println("Loaded ontology: " + localOntology);
factory = manager.getOWLDataFactory();
}
catch (UnparsableOntologyException e) {
System.out.println("Could not parse the ontology: " + e.getMessage());
Map<OWLParser, OWLParserException> exceptions = e.getExceptions();
for (OWLParser parser : exceptions.keySet()) {
System.out.println("Tried to parse the ontology with the " + parser.getClass().getSimpleName() + " parser");
System.out.println("Failed because: " + exceptions.get(parser).getMessage());
}
}
catch (UnloadableImportException e) {
System.out.println("Could not load import: " + e.getImportsDeclaration());
OWLOntologyCreationException cause = e.getOntologyCreationException();
System.out.println("Reason: " + cause.getMessage());
}
catch (OWLOntologyCreationException e) {
System.out.println("Could not load ontology: " + e.getMessage());
}
}
public void addInstance(String Class, String individual) {
OWLClass owlClass = factory.getOWLClass(Class, pm);
OWLClass superClass = factory.getOWLThing();
OWLIndividual instance = factory.getOWLNamedIndividual(individual, pm);
OWLClassAssertionAxiom classAssertion1 = factory.getOWLClassAssertionAxiom(superClass, instance);
manager.addAxiom(localOntology, classAssertion1);
OWLClassAssertionAxiom classAssertion2 = factory.getOWLClassAssertionAxiom(owlClass, instance);
manager.addAxiom(localOntology, classAssertion2);
System.out.println("Instance added");
}
}
InJava(用javascript加载的applet):
public class InJava extends Applet{
private static LoadOntology loadedOntology;
public void addInstance(String Class, String individual) {
Graphics g = getGraphics();
g.drawString("Test", 10, 10);
loadedOntology = new LoadOntology();
loadedOntology.addInstance(Class, individual);
}
}
当我加载applet时,根本没有错误,但是当我尝试调用addInstance方法时:
<input type="button" value="call Java Applet method" onClick = 'document.owlapi.addInstance("Abstract_Feature", "New_Test")'>
<APPLET CODE="owlapi/InJava.class" NAME="owlapi" HEIGHT=100 WIDTH=100> </APPLET>
浏览器抛出错误Uncaught Error: Error calling method on NPObject.
在stackoverflow上阅读了一些关于此问题的问题之后,我得出的结论是该插件必须有问题。
我在方法中添加了一些测试代码(drawString(“Test”,10,10)),所以我建议LoadOntology类的构造会产生一些问题(这个类在作品中分别进行了测试)在其自己的)。有人看到我做错了吗?
update:我添加了applet使用的java类的一部分:repository loader。所有提供的代码都应该编译。
更新:我没有使用MASCRIPT/SCRIPTABLE
因为代码基于this示例,该示例适用于我当前的浏览器(chrome)
udpate:您必须将owlapi jar包含在buildpath中,可以下载here
答案 0 :(得分:1)
根据我所知道的片段,我建议尝试使用此HTML。
<html>
<body>
<APPLET
CODE="owlapi.InJava"
NAME="owlapi"
archive="owlapi/owl1.jar,owlapi/owl2.jar"
HEIGHT=100
WIDTH=100>
</APPLET>
</body>
</html>
这个HTML“静态地”嵌入applet - 不使用JavaScript。类名(code
属性)应该是类的完全限定名,而不是文件名。虽然后者通常是可以容忍的,但这是不正确的。它显示了如何从owlapi
目录导入API,根据需要更改名称。
同样值得关注的是混合松散的类文件和Jars。这往往会混淆开发人员和JRE。如果将owlapi.InJava
类放在my.jar
内,并且该Jar与其余的放在同一目录中,则可以添加codebase
并缩短archive
路径。像这样:
<html>
<body>
<APPLET
CODE="owlapi.InJava"
NAME="owlapi"
codebase="owlapi"
archive="my.jar,owl1.jar,owl2.jar"
HEIGHT=100
WIDTH=100>
</APPLET>
</body>
</html>
这不是有效的HTML。这只是一个检查基础知识的测试。稍后,您需要使用有效的HTML并(可能)使用applet info. page中提到的deployJava.js
部署applet。