java外部函数调用saxon 9.9he xslt
我们正在使用xalan进行xml转换。现在，为了支持xslt 3.0并提高性能，我们正在迁移到saxon 9.9 HE
当前代码
Java代码
HashMap<String, String> columnPropsMap= getProperties(strDSNName);
transformer.setParameter("propsMap", columnPropsMap);//set map to xslt
**XSLT**
...xmlns:map="xalan://java.util.Map" extension-element-prefixes="map"
...<xsl:param name="propsMap"/> <!--read map passed from java-->
...<xsl:variable name="defaultvalue" select="map:get($propsMap,translate($udpname,$lowercase,$uppercase))"/><!-- retrieve the property for udp(property) by udpname from hashmap propsMap-->
**New code**
**java**
System.setProperty("javax.xml.transform.TransformerFactory",
"net.sf.saxon.TransformerFactoryImpl");//set saxon transformer factory
**XSLT**
xmlns:map="http://ns.saxonica.com/map" extension-element-prefixes="map"<!--namespace change-->
下面是一个涉及地图的错误行：get（$propsMap，translate（$udpname，$lowercase，$uppercase））。我相信9.9他不支持外部通话功能。或者，我们需要使用ExtensionFunctionDefinition的自定义函数。无法理解如何读取地图和设置值
请求建议如何在SAxon 9.9中处理xslt中的映射参数
错误堆栈跟踪
Error evaluating ((element()[fn:name(...) eq "UDP_Instance_Groups"])/element()[fn:name(...) eq "UDP_Instance"]!let $udpval := ...) in xsl:variable/@select on line 953 column 113
XTDE1425: Cannot find a 2-argument function named Q{http://ns.saxonica.com/map}get()
invoked by unknown caller (class net.sf.saxon.expr.instruct.ForEach) at #947
invoked by unknown caller (class net.sf.saxon.expr.instruct.ForEach) at #568
In template rule with match="*[fn:name(...) eq "Physical_Columns_Order_Ref"]" on line 565 of
invoked by xsl:apply-templates at #509
invoked by unknown caller (class net.sf.saxon.expr.instruct.ForEach) at #81
In template rule with match="/" on line 38 of
; SystemID: ; Line#: 953; Column#: 60
net.sf.saxon.trans.XPathException: Cannot find a 2-argument function named Q{http://ns.saxonica.com/map}get()
at net.sf.saxon.expr.ErrorExpression.evaluateItem(ErrorExpression.java:149)
at net.sf.saxon.expr.parser.Evaluator$5.evaluate(Evaluator.java:191)
at net.sf.saxon.expr.parser.Evaluator$5.evaluate(Evaluator.java:188)
at net.sf.saxon.expr.LetExpression.eval(LetExpression.java:532)
at net.sf.saxon.expr.LetExpression.process(LetExpression.java:601)
at net.sf.saxon.expr.instruct.ForEach.lambda$processLeavingTail$0(ForEach.java:484)
at net.sf.saxon.expr.instruct.ForEach$$Lambda$51/1933790033.accept(Unknown Source)
at net.sf.saxon.om.SequenceIterator.forEachOrFail(SequenceIterator.java:128)
at net.sf.saxon.expr.instruct.ForEach.processLeavingTail(ForEach.java:484)
at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
at net.sf.saxon.expr.LetExpression.processLeavingTail(LetExpression.java:723)
at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
at net.sf.saxon.expr.LetExpression.processLeavingTail(LetExpression.java:723)
at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
at net.sf.saxon.expr.LetExpression.processLeavingTail(LetExpression.java:723)
at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
at net.sf.saxon.expr.LetExpression.processLeavingTail(LetExpression.java:723)
at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
at net.sf.saxon.expr.LetExpression.processLeavingTail(LetExpression.java:723)
at net.sf.saxon.expr.instruct.Choose.processLeavingTail(Choose.java:896)
at net.sf.saxon.expr.instruct.Choose.processLeavingTail(Choose.java:896)
at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
at net.sf.saxon.expr.instruct.ForEach.lambda$processLeavingTail$0(ForEach.java:484)
at net.sf.saxon.expr.instruct.ForEach$$Lambda$51/1933790033.accept(Unknown Source)
at net.sf.saxon.om.SequenceIterator.forEachOrFail(SequenceIterator.java:128)
at net.sf.saxon.expr.instruct.ForEach.processLeavingTail(ForEach.java:484)
at net.sf.saxon.expr.LetExpression.processLeavingTail(LetExpression.java:723)
at net.sf.saxon.expr.instruct.TemplateRule.applyLeavingTail(TemplateRule.java:352)
at net.sf.saxon.trans.Mode.applyTemplates(Mode.java:533)
at net.sf.saxon.expr.instruct.ApplyTemplates.apply(ApplyTemplates.java:300)
at net.sf.saxon.expr.instruct.ApplyTemplates.process(ApplyTemplates.java:251)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
at net.sf.saxon.expr.LetExpression.processLeavingTail(LetExpression.java:723)
at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
at net.sf.saxon.expr.instruct.Choose.processLeavingTail(Choose.java:896)
at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
at net.sf.saxon.expr.instruct.ForEach.lambda$processLeavingTail$0(ForEach.java:484)
at net.sf.saxon.expr.instruct.ForEach$$Lambda$51/1933790033.accept(Unknown Source)
at net.sf.saxon.om.SequenceIterator.forEachOrFail(SequenceIterator.java:128)
at net.sf.saxon.expr.instruct.ForEach.processLeavingTail(ForEach.java:484)
at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:735)
at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:132)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:352)
at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:299)
at net.sf.saxon.expr.LetExpression.processLeavingTail(LetExpression.java:723)
at net.sf.saxon.expr.instruct.TemplateRule.applyLeavingTail(TemplateRule.java:352)
at net.sf.saxon.trans.Mode.applyTemplates(Mode.java:533)
# 1 楼答案
我建议在XSLT端使用XDM 3.1映射（即序列类型
map(xs:string, xs:string)）作为参数，然后您可以简单地使用XPath 3.1映射访问功能（例如$map($key)、$map?key）和XPath 3.1映射函数https://www.w3.org/TR/xpath-functions/#map-functions转换java。util。当您传入参数时，使用方法
makeMap（http://saxonica.com/html/documentation/javadoc/net/sf/saxon/s9api/XdmMap.html#makeMap-java.util.Map-）映射到XDM映射