Hi Shafreen, I have used [1] in testing the functions, since there is no proper reference to get a list of functions supported by the Saxon 9.4 HE. Based on this, can we confirm that the mentioned functions in the above thread are not supported in HE? (so that we can conclude with the functions we are supporting in ESB)
[1] http://www.saxonica.com/html/documentation9.4/functions/ Sohani Weerasinghe Senior Software Engineer WSO2, Inc: http://wso2.com Mobile : +94 716439774 Blog :http://christinetechtips.blogspot.com/ Twitter : https://twitter.com/sohanichristine On Fri, Aug 5, 2016 at 10:21 AM, Shafreen Anfar <shafr...@wso2.com> wrote: > Hi Sohanai, > > [+ Asanthi] > > We are using Saxon: HE (Home Edition) for XAPTH 2 functions. AFAIK, we > don't select functionality to support so anything supported by library > should already be there, which means it's likely HE edition does not > contain function you're looking for. Please have a look at [1]. > > [1] http://www.saxonica.com/html/documentation9.4/about/ > > On Thu, Aug 4, 2016 at 6:57 PM, Sohani Weerasinghe <soh...@wso2.com> > wrote: > >> Hi ESB Team, >> >> Please find the summary of issues encountered while testing the XPath 2.0 >> functions at [1] ( referred [2] & [3] for syntax) and really appreciate >> your input on this >> >> >> *1. "Invalid XPath Syntax" occurs when saving the synapse configuration >> in management console* >> >> This error occurs for below functions: >> >> - avg- fn:avg((1,2,3,4,5)) >> - codepoints-to-string - fn:codepoints-to-string((97, 32, 98, 32, >> 99))) >> - distinct-values - fn:distinct-values( ('a', 'b', 'a') ) -This is >> supported when passing the value as an xml payload >> - id - //book/section/secRef/fn:id(@refs) >> - idref - //book/idref('language')/string(.) >> - index-of - fn:index-of( (4, 5, 6, 4), 4) >> - max- fn:max((2,3,5)) >> - min - fn:min((2,3,5)) >> - remove - fn:remove( ('a', 'b', 'c'), 2) >> - reverse - fn:reverse((1, 2, 3, 4, 5)) -This is supported when >> passing the value as an xml payload >> - string-join - string-join( ('a', 'b', 'c'), '') >> - subsequence - fn:subsequence(('a', 'b', 'c', 'd', 'e'), 3) >> >> >> *2. Issues in using error() function* >> >> According to https://www.w3.org/TR/xpath-functions-30/#ERRFOER0000 , >> calling the function with empty parameters should give an unidentified >> error. But when invoking the service it gives below exception >> >> Is this accepted? >> >> ERROR - SynapseXPath Evaluation of the XPath expression fn:error() >> resulted in an error >> ; Line#: 1; Column#: -1 >> net.sf.saxon.trans.XPathException: Error signalled by application call >> on error() >> at net.sf.saxon.functions.Error.error(Error.java:98) >> at net.sf.saxon.functions.Error.evaluateItem(Error.java:55) >> at net.sf.saxon.expr.Expression.iterate(Expression.java:429) >> at net.sf.saxon.xpath.XPathExpressionImpl.evaluate(XPathExpress >> ionImpl.java:326) >> at net.sf.saxon.xpath.XPathExpressionImpl.evaluate(XPathExpress >> ionImpl.java:389) >> at org.apache.synapse.util.xpath.SynapseXPath.evaluateDOMXPath( >> SynapseXPath.java:533) >> at org.apache.synapse.util.xpath.SynapseXPath.stringValueOf(Syn >> apseXPath.java:367) >> at org.apache.synapse.mediators.MediatorProperty.getEvaluatedEx >> pression(MediatorProperty.java:138) >> at org.apache.synapse.mediators.builtin.LogMediator.setCustomPr >> operties(LogMediator.java:223) >> at org.apache.synapse.mediators.builtin.LogMediator.getCustomLo >> gMessage(LogMediator.java:146) >> at org.apache.synapse.mediators.builtin.LogMediator.getLogMessa >> ge(LogMediator.java:132) >> at org.apache.synapse.mediators.builtin.LogMediator.mediate(Log >> Mediator.java:101) >> at org.apache.synapse.mediators.AbstractListMediator.mediate(Ab >> stractListMediator.java:97) >> at org.apache.synapse.mediators.AbstractListMediator.mediate(Ab >> stractListMediator.java:54) >> at org.apache.synapse.mediators.base.SequenceMediator.mediate(S >> equenceMediator.java:158) >> at org.apache.synapse.core.axis2.ProxyServiceMessageReceiver.re >> ceive(ProxyServiceMessageReceiver.java:210) >> at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180) >> at org.apache.synapse.transport.passthru.ServerWorker.processEn >> tityEnclosingRequest(ServerWorker.java:398) >> at org.apache.synapse.transport.passthru.ServerWorker.run(Serve >> rWorker.java:145) >> at org.apache.axis2.transport.base.threads.NativeWorkerPool$1. >> run(NativeWorkerPool.java:172) >> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPool >> Executor.java:1145) >> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoo >> lExecutor.java:615) >> at java.lang.Thread.run(Thread.java:745) >> >> >> *3. "System function is not available with this host language/version" >> occurs when invoking the service* >> >> According to <https://mail.google.com/mail/u/0/goog_627243550> >> https://sourceforge.net/p/saxon/mailman/saxon-help/thread/ >> 50f7f8b9.4090...@falutin.net/, it seems this is an XSLT function, is >> that the reason for getting the below error? but at [1] this function >> is declared as an XPath function >> >> >> [2016-08-02 12:47:27,875] ERROR - SynapseXPath Evaluation of the XPath >> expression fn:format-date(fn:current-date(), '[Y01]/[M01]/[D01]') >> resulted in an error >> net.sf.saxon.trans.XPathException: System function format-date#2 is not >> available with this host language/version >> at net.sf.saxon.expr.parser.ExpressionParser.grumble(Expression >> Parser.java:263) >> at net.sf.saxon.expr.parser.ExpressionParser.parseFunctionCall( >> ExpressionParser.java:2375) >> at net.sf.saxon.expr.parser.ExpressionParser.parseBasicStep(Exp >> ressionParser.java:1731) >> at net.sf.saxon.expr.parser.ExpressionParser.parseStepExpressio >> n(ExpressionParser.java:1654) >> at net.sf.saxon.expr.parser.ExpressionParser.parseRelativePath( >> ExpressionParser.java:1573) >> at net.sf.saxon.expr.parser.ExpressionParser.parsePathExpressio >> n(ExpressionParser.java:1557) >> at net.sf.saxon.expr.parser.ExpressionParser.parseUnaryExpressi >> on(ExpressionParser.java:1447) >> at net.sf.saxon.expr.parser.ExpressionParser.parseExprSingle(Ex >> pressionParser.java:517) >> at net.sf.saxon.expr.parser.ExpressionParser.parseExpression(Ex >> pressionParser.java:455) >> at net.sf.saxon.expr.parser.ExpressionParser.parse(ExpressionPa >> rser.java:391) >> at net.sf.saxon.expr.parser.ExpressionTool.make(ExpressionTool.java:94) >> at net.sf.saxon.xpath.XPathEvaluator.createExpressionInternal(X >> PathEvaluator.java:235) >> at net.sf.saxon.xpath.XPathEvaluator.compile(XPathEvaluator.java:376) >> at org.apache.synapse.util.xpath.SynapseXPath.evaluateDOMXPath( >> SynapseXPath.java:532) >> at org.apache.synapse.util.xpath.SynapseXPath.stringValueOf(Syn >> apseXPath.java:367) >> at org.apache.synapse.mediators.MediatorProperty.getEvaluatedEx >> pression(MediatorProperty.java:138) >> at org.apache.synapse.mediators.builtin.LogMediator.setCustomPr >> operties(LogMediator.java:223) >> at org.apache.synapse.mediators.builtin.LogMediator.getCustomLo >> gMessage(LogMediator.java:146) >> at org.apache.synapse.mediators.builtin.LogMediator.getLogMessa >> ge(LogMediator.java:132) >> at org.apache.synapse.mediators.builtin.LogMediator.mediate(Log >> Mediator.java:101) >> at org.apache.synapse.mediators.AbstractListMediator.mediate(Ab >> stractListMediator.java:97) >> at org.apache.synapse.mediators.AbstractListMediator.mediate(Ab >> stractListMediator.java:54) >> at org.apache.synapse.mediators.base.SequenceMediator.mediate(S >> equenceMediator.java:158) >> at org.apache.synapse.core.axis2.ProxyServiceMessageReceiver.re >> ceive(ProxyServiceMessageReceiver.java:210) >> at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180) >> at org.apache.synapse.transport.passthru.ServerWorker.processEn >> tityEnclosingRequest(ServerWorker.java:398) >> at org.apache.synapse.transport.passthru.ServerWorker.run(Serve >> rWorker.java:145) >> at org.apache.axis2.transport.base.threads.NativeWorkerPool$1. >> run(NativeWorkerPool.java:172) >> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPool >> Executor.java:1145) >> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoo >> lExecutor.java:615) >> at java.lang.Thread.run(Thread.java:745) >> >> *4. Error in using insert-before() function* >> >> >> According to https://docs.marklogic.com/fn:insert-before if the function >> written as >> fn:insert-before('a', 0, 'x'), then it gives the below error when >> invoking the service >> >> If the position casts to xs:integer as fn:insert-before('a', >> xs:integer(0), 'x') and invoke the service then the result only has 'x' but >> the expected result should be 'x,a' >> >> >> [2016-08-02 14:39:23,625] ERROR - SynapseXPath Evaluation of the XPath >> expression fn:insert-before('a', 1, 'x') resulted in an error >> ; Line#: 1; Column#: -1 >> net.sf.saxon.trans.XPathException: Required item type of second argument >> of fn:insert-before() is xs:integer; supplied value has item type xs:decimal >> at net.sf.saxon.expr.parser.TypeChecker.staticTypeCheck(TypeChe >> cker.java:404) >> at net.sf.saxon.functions.SystemFunction.checkArgument(SystemFu >> nction.java:117) >> at net.sf.saxon.functions.SystemFunction.checkArguments(SystemF >> unction.java:100) >> at net.sf.saxon.expr.FunctionCall.typeCheck(FunctionCall.java: >> 134) >> at net.sf.saxon.expr.parser.ExpressionVisitor.typeCheck(Express >> ionVisitor.java:206) >> at net.sf.saxon.xpath.XPathEvaluator.createExpressionInternal(X >> PathEvaluator.java:239) >> at net.sf.saxon.xpath.XPathEvaluator.compile(XPathEvaluator. >> java:376) >> at org.apache.synapse.util.xpath.SynapseXPath.evaluateDOMXPath( >> SynapseXPath.java:532) >> at org.apache.synapse.util.xpath.SynapseXPath.stringValueOf(Syn >> apseXPath.java:367) >> at org.apache.synapse.mediators.MediatorProperty.getEvaluatedEx >> pression(MediatorProperty.java:138) >> at org.apache.synapse.mediators.builtin.LogMediator.setCustomPr >> operties(LogMediator.java:223) >> at org.apache.synapse.mediators.builtin.LogMediator.getCustomLo >> gMessage(LogMediator.java:146) >> at org.apache.synapse.mediators.builtin.LogMediator.getLogMessa >> ge(LogMediator.java:132) >> at org.apache.synapse.mediators.builtin.LogMediator.mediate(Log >> Mediator.java:101) >> at org.apache.synapse.mediators.AbstractListMediator.mediate(Ab >> stractListMediator.java:97) >> at org.apache.synapse.mediators.AbstractListMediator.mediate(Ab >> stractListMediator.java:54) >> at org.apache.synapse.mediators.base.SequenceMediator.mediate(S >> equenceMediator.java:158) >> at org.apache.synapse.core.axis2.ProxyServiceMessageReceiver.re >> ceive(ProxyServiceMessageReceiver.java:210) >> at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java: >> 180) >> at org.apache.synapse.transport.passthru.ServerWorker.processEn >> tityEnclosingRequest(ServerWorker.java:398) >> at org.apache.synapse.transport.passthru.ServerWorker.run(Serve >> rWorker.java:145) >> at org.apache.axis2.transport.base.threads.NativeWorkerPool$1. >> run(NativeWorkerPool.java:172) >> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPool >> Executor.java:1145) >> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoo >> lExecutor.java:615) >> at java.lang.Thread.run(Thread.java:745) >> >> >> >> *5. nilled() function always gives the result as false* >> >> ref: http://www.xqueryfunctions.com/xq/fn_nilled.html >> >> payload: >> >> <root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";> >> <child>12</child> <child xsi:nil="true"></child> <child></child> <child/> >> <child xsi:nil="false"></child> </root> >> >> function: fn:nilled(//child[1]) >> >> For all child elements it gives false ( even for the elements which has >> xsi:nil) >> >> >> *6. root() function does not give the root element* >> >> ref:http://www.xqueryfunctions.com/xq/fn_root.html >> >> payload: >> >> <a> >> <x>123</x> >> </a> >> >> function: fn:root(//x) >> >> result : 123 >> >> expected result : >> <a> >> <x>123</x> >> </a> >> >> >> *7. Using the function static-base-uri()* >> >> ref: http://www.xqueryfunctions.com/xq/fn_static-base-uri.html >> >> Can someone please mention how to define the function and the usage? >> >> >> >> *8. Using the function unordered()* >> >> ref: https://docs.marklogic.com/fn.unordered >> >> payload : >> >> <a> >> <x>1</x> >> <x>2</x> >> <x>3</x> >> </a> >> >> function: fn:unordered(//x) >> >> result : 1 >> >> Can someone please explain the usage of this function? it seems the >> expected result should be a sequence of items >> >> >> >> >> -more information on the testing results can be found at [4] >> >> -Further, when going through the functions at [1] it seems below >> functions are only supported for XSLT ( I guess we don't need to support >> those functions when considering the XPath 2.0 functions, please correct me >> if I'm wrong) >> >> ref: https://docs.marklogic.com/fn >> >> functions: >> >> - current >> - current-group >> - current-grouping-key >> - document >> - element-available >> - function-available >> - generate-id(http://www.xsltfunctions.com/xsl/fn_generate-id.html) >> - regex-group >> - system-property >> - type-available >> - unparsed-entity-public-id >> - unparsed-entity-uri >> - unparsed-text >> - unparsed-text-available >> >> >> - XPath 3.0 functions listed at [1] >> >> acos ,analyze-string,asin,atan,ata2,available-environment-variables,cos, >> element-with-id,environment-variable,exp,exp10,filter,fold-left, >> fold-right,format-integer,function-arity,function-lookup,function-name, >> has-children,head,innermost,log,log10,map,map-pairs,outermost,parse-json, >> parse-xml ,path,pi,pow,round,serialize,serialize-json,sin,sqrt,tail,tan, >> unparsed-text-lines,uri-collection >> >> >> >> [1] http://www.saxonica.com/html/documentation9.4/functions/ >> [2] http://www.xqueryfunctions.com/ >> [3] https://docs.marklogic.com/js/fn >> [4] https://docs.google.com/a/wso2.com/spreadsheets/d/1LLVST >> AGrqpouQIkt1p3dRx5_wqjuUa58QnKd7gbgQTU/edit?usp=sharing >> >> Thanks, >> Sohani >> >> Sohani Weerasinghe >> Senior Software Engineer >> WSO2, Inc: http://wso2.com >> >> Mobile : +94 716439774 >> Blog :http://christinetechtips.blogspot.com/ >> Twitter : https://twitter.com/sohanichristine >> >> On Mon, Aug 1, 2016 at 4:28 PM, Sohani Weerasinghe <soh...@wso2.com> >> wrote: >> >>> According to [1] if I test the distinct-values function,it behaves as >>> explained below: >>> >>> >>> 1. If I use a rest mock service to get the response and then get the >>> distinct values : >>> >>> Rest mock service response: >>> >>> <catalog xml:base="http://example.org/ACC/";> <product dept="WMN"> >>> *<number>557</number> >>> <number>44</number>* >>> *<number>44</number>* </product> </catalog> >>> >>> Rest API: >>> >>> <api xmlns="http://ws.apache.org/ns/synapse"; name="sample123" >>> context="/test123"> <resource methods="POST GET"> <inSequence> <send> >>> <endpoint> <address uri="http://localhost:8080/getResult"/> </endpoint> >>> </send> </inSequence> <outSequence> <log level="custom"> <property >>> xmlns:fn="http://www.w3.org/2005/xpath-functions"; xmlns:ns=" >>> http://org.apache.synapse/xsd"; xmlns:base="http://test"; >>> name="testValue" *expression="fn:**distinct-values**(//product/*)"/*> >>> </log> </outSequence> </resource> </api> >>> >>> >>> Then expected result is : *557, 44* >>> >>> But I am getting only *557* >>> >>> Am I missing something here? >>> >>> 2. If I directly use this function as below >>> >>> <proxy xmlns="http://ws.apache.org/ns/synapse"; >>> name="testProxy" >>> transports="http https" >>> startOnLoad="true"> >>> <description/> >>> <target> >>> <inSequence> >>> <log level="custom"> >>> <property xmlns:fn="http://www.w3.org/2005/xpath-functions"; >>> xmlns:xs="http://www.w3.org/2001/XMLSchema"; >>> xmlns:ns="http://org.apache.synapse/xsd"; >>> name="testValue" >>> expression="*fn:**distinct-values**(('a', 'b', >>> 'a'))*"/> >>> </log> >>> </inSequence> >>> <outSequence/> >>> </target> >>> </proxy> >>> >>> Then I'm getting the exception "invalid XPapth expression" in saving >>> the proxy >>> >>> But according to [1] it seems both ways are correct >>> >>> >>> [1] http://www.xqueryfunctions.com/xq/fn_distinct-values.html >>> >>> Thanks, >>> Sohani >>> >>> Sohani Weerasinghe >>> Senior Software Engineer >>> WSO2, Inc: http://wso2.com >>> >>> Mobile : +94 716439774 >>> Blog :http://christinetechtips.blogspot.com/ >>> Twitter : https://twitter.com/sohanichristine >>> >>> On Mon, Aug 1, 2016 at 3:54 PM, Sohani Weerasinghe <soh...@wso2.com> >>> wrote: >>> >>>> >>>> >>>> >>>> Sohani Weerasinghe >>>> Senior Software Engineer >>>> WSO2, Inc: http://wso2.com >>>> >>>> Mobile : +94 716439774 >>>> Blog :http://christinetechtips.blogspot.com/ >>>> Twitter : https://twitter.com/sohanichristine >>>> >>>> On Mon, Aug 1, 2016 at 1:28 PM, Sohani Weerasinghe <soh...@wso2.com> >>>> wrote: >>>> >>>>> Hi All, >>>>> >>>>> It seems, the " Invalid XPapth expression" comes when we use two >>>>> brackets in the function as below >>>>> >>>> >>>> >>>> While I was testing further I found that below function works perfectly >>>> even it has two brackets, so that means the syntax of the above mentioned >>>> functions are correct. >>>> >>>> So, are these functions not supported in ESB? Appreciate your input on >>>> this >>>> >>>> fn:dateTime(xs:date('2006-08-15'), xs:time('12:30:45-05:00')) >>>> >>>> >>>>> fn:codepoints-to-string(*(*2309, 2358, 2378, 2325*)*) >>>>> fn:string-join(('a', 'c'), 'bbb') >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> Sohani Weerasinghe >>>>> Senior Software Engineer >>>>> WSO2, Inc: http://wso2.com >>>>> >>>>> Mobile : +94 716439774 >>>>> Blog :http://christinetechtips.blogspot.com/ >>>>> Twitter : https://twitter.com/sohanichristine >>>>> >>>>> On Mon, Aug 1, 2016 at 12:06 PM, Sohani Weerasinghe <soh...@wso2.com> >>>>> wrote: >>>>> >>>>>> Hi All, >>>>>> >>>>>> I am validating the Xpath 2.0 functions support in ESB ( please refer >>>>>> [1]) and I am using below configuration in defining 'avg' function >>>>>> (Referred [2]), but it seems I am using the wrong syntax. >>>>>> >>>>>> <property xmlns:fn="http://www.w3.org/2005/xpath-functions"; >>>>>> xmlns:test="http://test"; >>>>>> xmlns:ns="http://org.apache.synapse/xsd"; >>>>>> name="testValue" >>>>>> * expression="fn:avg((3,4,5))"/>* >>>>>> >>>>>> Can someone please point the correct syntax? >>>>>> >>>>>> Since avg function requires a single parameter, is there a way to >>>>>> define the integer values externally ( may be using a property mediator ) >>>>>> and use it inside the function ? >>>>>> >>>>>> If this syntax is correct, is this function not supported in ESB? >>>>>> >>>>>> Really appreciate your input on this >>>>>> >>>>>> FYI: When saving the proxy, I'm getting below exception: >>>>>> >>>>>> [2016-08-01 11:41:11,718] ERROR - ProxyServiceAdmin Unable to save >>>>>> changes made for the proxy service : testProxy. Restored the existing >>>>>> proxy... :: Invalid XPapth expression : fn:avg((3,4,5)) >>>>>> org.apache.synapse.SynapseException: Invalid XPapth expression : >>>>>> fn:avg((3,4,5)) >>>>>> at org.apache.synapse.config.xml.MediatorPropertyFactory.getMed >>>>>> iatorProperties(MediatorPropertyFactory.java:106) >>>>>> at org.apache.synapse.config.xml.LogMediatorFactory.createSpeci >>>>>> ficMediator(LogMediatorFactory.java:111) >>>>>> ....... >>>>>> >>>>>> >>>>>> >>>>>> [1] Xpath 2.0.0 functions supported by ESB >>>>>> [2] https://www.w3.org/TR/xpath-functions/#func-avg >>>>>> Sohani Weerasinghe >>>>>> Senior Software Engineer >>>>>> WSO2, Inc: http://wso2.com >>>>>> >>>>>> Mobile : +94 716439774 >>>>>> Blog :http://christinetechtips.blogspot.com/ >>>>>> Twitter : https://twitter.com/sohanichristine >>>>>> >>>>> >>>>> >>>> >>> >> > > > -- > Regards, > *Shafreen* > Software Engineer > WSO2 Inc > Mobile : 077-556-395-1 >
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