问题描述
我正在发布请求帮助我让Saxon Extension功能在Oxygen XML Editor中工作的功能。我已经为函数定义,函数调用和初始化程序类创建了java类。我在一个JAR文件中有定义和函数调用,在另一个JAR文件中有初始化程序。我将JAR文件和一个包含所有必需库的“ lib”文件夹放置在XSL所存储的目录中:
我已在“转换方案”窗口的“扩展”对话框中列出了它们:
并且我试图列出初始化程序:
在以下对话框中选择“选择”按钮,然后选择“检测”按钮时,它不会检测到该类:
当我尝试进行转换时,我收到以下问题消息:
import net.sf.saxon.lib.ExtensionFunctionCall;
import net.sf.saxon.lib.ExtensionFunctionDeFinition;
import net.sf.saxon.om.StructuredQName;
import net.sf.saxon.value.SequenceType;
/**
*
* @author tfurst
*/
public class CreateXmlMapDeFinition extends ExtensionFunctionDeFinition{
@Override
public StructuredQName getFunctionQName() {
return new StructuredQName("rcmt","http://rcmt.com/saxon-extension","create-map");
}
@Override
public SequenceType[] getArgumentTypes() {
return new SequenceType[]{SequenceType.SINGLE_STRING};
}
@Override
public SequenceType getResultType(SequenceType[] sts) {
return SequenceType.ANY_SEQUENCE;
}
@Override
public ExtensionFunctionCall makeCallExpression() {
return new CreateXmlExtension();
}
}
import com.rcmt.mapProcessor.ExcelMapProcessor;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.transform.source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import net.sf.saxon.expr.XPathContext;
import net.sf.saxon.lib.ExtensionFunctionCall;
import net.sf.saxon.om.DocumentInfo;
import net.sf.saxon.om.Sequence;
import net.sf.saxon.trans.XPathException;
import org.w3c.dom.Document;
public class CreateXmlExtension extends ExtensionFunctionCall{
@Override
public Sequence call(XPathContext xpc,Sequence[] args) throws XPathException
{
String excelPath = args[0].head().getStringValue();
DocumentInfo doc = getXml(xpc,excelPath);
return doc;
}
private DocumentInfo getXml(XPathContext context,String path)
{
DocumentInfo xml = null;
try
{
Document d = ExcelMapProcessor.makeXml(path);
xml = (DocumentInfo)context.getConfiguration().buildDocumentTree(makeSource(d));
}
catch (XPathException ex)
{
Logger.getLogger(CreateXmlExtension.class.getName()).log(Level.SEVERE,null,ex);
}
return xml;
}
private Source makeSource(Document doc)
{
Source result = null;
try
{
TransformerFactory transformerFactory = new net.sf.saxon.TransformerFactoryImpl();
Transformer trans = transformerFactory.newTransformer();
DOMSource src = new DOMSource(doc);
StreamResult res = new StreamResult(new ByteArrayOutputStream ());
trans.transform(src,res);
ByteArrayOutputStream so = (ByteArrayOutputStream)res.getoutputStream();
result = new StreamSource(new ByteArrayInputStream(so.toByteArray()));
so.close();
}
catch (TransformerException | IOException ex)
{
Logger.getLogger(CreateXmlExtension.class.getName()).log(Level.SEVERE,ex);
}
return result;
}
}
这是我初始化程序的代码:
import javax.xml.transform.TransformerException;
import net.sf.saxon.Configuration;
import net.sf.saxon.lib.Initializer;
import net.sf.saxon.om.NamePool;
import org.expath.httpclient.saxon.SendRequestFunction;
import com.rcmt.map.CreateXmlMapDeFinition;
/**
*
* @author tfurst
*/
public class SaxonExtinitializer implements Initializer{
@Override
public void initialize(Configuration config) throws TransformerException {
config.registerExtensionFunction(new CreateXmlMapDeFinition());
SendRequestFunction expathHttpClient = new SendRequestFunction();
config.setNamePool(new NamePool());
expathHttpClient.setConfiguration(config);
config.registerExtensionFunction(expathHttpClient);
}
}
最后,XSL中的用法:
解决方法
如果您有一个jar
包含扩展功能的ExtensionFunctionDefinition
和ExtensionFunctionCall
,则在该jar
中,在META-INF
中文件夹,创建一个名为services
的子文件夹,并在该文件夹的内部创建一个名为net.sf.saxon.lib.ExtensionFunctionDefinition
的文本文件,该文件在每一行上列出了相关的类,例如CreateXmlMapDefinition
(以其中的任何名称空间作为前缀)。
它看起来像这样:
然后在转换场景对话框中提供该jar作为扩展。您不需要那种初始化器。我已经测试过oXygen 22.1和Saxon 9.9。