I am writing a RESTFUL web service in Java.The idea is to "cut down" an XML document and strip away all the un-needed content (~98%) and leave only the tags we're interested in, while maintaining the document's structure, which is as follows (I cannot provide the actual XML content for confidentiality reasons):\[code\]<sear:SEGMENTS xmlns="http://www.exlibrisgroup.com/xsd/primo/primo_nm_bib" xmlns:sear="http://www.exlibrisgroup.com/xsd/jaguar/search"> <sear:JAGROOT> <sear:RESULT> <sear
OCSET IS_LOCAL="true" TOTAL_TIME="176" LASTHIT="9" FIRSTHIT="0" TOTALHITS="262" HIT_TIME="11"> <searOC SEARCH_ENGINE_TYPE="Local Search Engine" SEARCH_ENGINE="Local Search Engine" NO="1" RANK="0.086826384" ID="2347460"> [ <PrimoNMBib> <record> <display> <title></title> </display> <sort> <author></author> </sort> </record> </PrimoNMBib> ] </searOC> </searOCSET> </sear:RESULT> </sear:JAGROOT></sear:SEGMENTS>\[/code\]Of course, this is the structure of only the tags we are interested in - there are hundreds more tags, but they are irrelevant.The square brackets ([]) are not part of the XML and indicate that the element are elements of a list of children and occur more than once - one per match of the search from the RESTFUL service.This being said, my Java code containing the XSLT stylesheet is as follows:\[code\] import java.io.StringReader; import java.io.StringWriter; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.TransformerFactoryConfigurationError; import javax.xml.transform.stream.StreamResult; import javax.xml.transform.stream.StreamSource; public String cutXML() throws TransformerFactoryConfigurationError, TransformerException { String xmlSourceResource = this.xml; // where this.xml is the full XML string of structure as presented above String xsltResource = "<xsl:stylesheet version=\"1.0\" xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\" xmlns:sear=\"http://www.exlibrisgroup.com/xsd/jaguar/search\">" + " <xsl
utput method=\"xml\" version=\"1.0\" omit-xml-declaration=\"no\" encoding=\"UTF-8\" indent=\"yes\"/>" + " <xsl:strip-space elements=\"*\"/>" + " <sear:WhiteList>" + " <name>title</name>" + " <name>author</name>" + " </sear:WhiteList>" + " <xsl:template match=\"node()|@*\">" + " <xsl:copy>" + " <xsl:apply-templates select=\"node()|@*\"/>" + " </xsl:copy>" + " </xsl:template>" + " <xsl:template match=\"*[not(descendant-or-self::*[name()=document('')/*/sear:WhiteList/*])]\"/>" + "</xsl:stylesheet>"; StringWriter xmlResultResource = new StringWriter(); // where the transformed/stripped-down XML will be written Transformer xmlTransformer = TransformerFactory.newInstance().newTransformer(new StreamSource(new StringReader(xsltResource))); // create transformer object with XSLT given xmlTransformer.transform(new StreamSource(new StringReader(xmlSourceResource)), new StreamResult(xmlResultResource)); // transform XML with transformer and write into result StringWriter return xmlResultResource.getBuffer().toString(); // return transformed XML string }\[/code\]Unfortunately, when I run it on the server, all I get is an empty page with an empty source, as if the result of the transformation was an empty String.The server's log file first gave the following information:\[code\] [#|2012-04-26T18:26:24.967+0000|INFO|glassfish3.1.2|com.sun.jersey.api.core.PackagesResourceConfig|_ThreadID=23;_ThreadName=Thread-2;|Scanning for root resource and provider classes in the packages: dk.kb.mobileservice|#] [#|2012-04-26T18:26:24.969+0000|INFO|glassfish3.1.2|com.sun.jersey.api.core.ScanningResourceConfig|_ThreadID=23;_ThreadName=Thread-2;|Root resource classes found: class dk.kb.mobileservice.Middle|#] [#|2012-04-26T18:26:24.970+0000|INFO|glassfish3.1.2|com.sun.jersey.api.core.ScanningResourceConfig|_ThreadID=23;_ThreadName=Thread-2;|No provider classes found.|#] [#|2012-04-26T18:26:24.978+0000|INFO|glassfish3.1.2|com.sun.jersey.server.impl.application.WebApplicationImpl|_ThreadID=23;_ThreadName=Thread-2;|Initiating Jersey application, version 'Jersey: 1.11 12/09/2011 10:27 AM'|#] [#|2012-04-26T18:26:25.192+0000|INFO|glassfish3.1.2|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=23;_ThreadName=Thread-2;|WEB0671: Loading application [kb2] at [/kb2]|#] [#|2012-04-26T18:26:25.200+0000|INFO|glassfish3.1.2|javax.enterprise.system.tools.admin.org.glassfish.deployment.admin|_ThreadID=23;_ThreadName=Thread-2;|kb2 was successfully deployed in 2,293 milliseconds.|#] [#|2012-04-26T18:26:46.263+0000|SEVERE|glassfish3.1.2|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=20;_ThreadName=Thread-2;|SystemId Unknown; Line #0; Column #0; java.lang.NullPointerException |#] [#|2012-04-26T18:31:09.772+0000|SEVERE|glassfish3.1.2|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=21;_ThreadName=Thread-2;|SystemId Unknown; Line #0; Column #0; java.lang.NullPointerException |#]\[/code\]and now it returns the following issues:\[code\] [#|2012-04-27T00:05:07.731+0000|SEVERE|glassfish3.1.2|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=21;_ThreadName=Thread-2;|Error on line 1 column 1 of file:/root/webglassfish3/glassfish/domains/domain1/config/: SXXP0003: Error reported by XML parser: Content is not allowed in prolog.|#] [#|2012-04-27T00:05:07.732+0000|SEVERE|glassfish3.1.2|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=21;_ThreadName=Thread-2;|Recoverable error on line 1 SXXP0003: org.xml.sax.SAXParseException: Content is not allowed in prolog.|#]\[/code\]I've tested the XML file and transformed it via browser, and it worked, so I don't think it's the XML's nor the XSLT stylesheet's fault... It seems to be a Java issue.When I run the above Java code on the entire XML outside of GlassFish, I get the following errors:\[code\] Exception in thread "main" java.lang.VerifyError: (class: GregorSamsa$0, method: test signature: (IIIILcom/sun/org/apache/xalan/internal/xsltc/runtime/AbstractTranslet;Lcom/sun/org/apache/xml/internal/dtm/DTMAxisIterator
Z) Incompatible type for getting or setting field at GregorSamsa.applyTemplates() at GregorSamsa.applyTemplates() at GregorSamsa.transform() at com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet.transform(AbstractTranslet.java:609) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:729) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:340) at XML2JSON.cutXML(XML2JSON.java:105) at XML2JSON.main(XML2JSON.java:31)\[/code\]
OCSET IS_LOCAL="true" TOTAL_TIME="176" LASTHIT="9" FIRSTHIT="0" TOTALHITS="262" HIT_TIME="11"> <searOC SEARCH_ENGINE_TYPE="Local Search Engine" SEARCH_ENGINE="Local Search Engine" NO="1" RANK="0.086826384" ID="2347460"> [ <PrimoNMBib> <record> <display> <title></title> </display> <sort> <author></author> </sort> </record> </PrimoNMBib> ] </searOC> </searOCSET> </sear:RESULT> </sear:JAGROOT></sear:SEGMENTS>\[/code\]Of course, this is the structure of only the tags we are interested in - there are hundreds more tags, but they are irrelevant.The square brackets ([]) are not part of the XML and indicate that the element are elements of a list of children and occur more than once - one per match of the search from the RESTFUL service.This being said, my Java code containing the XSLT stylesheet is as follows:\[code\] import java.io.StringReader; import java.io.StringWriter; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.TransformerFactoryConfigurationError; import javax.xml.transform.stream.StreamResult; import javax.xml.transform.stream.StreamSource; public String cutXML() throws TransformerFactoryConfigurationError, TransformerException { String xmlSourceResource = this.xml; // where this.xml is the full XML string of structure as presented above String xsltResource = "<xsl:stylesheet version=\"1.0\" xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\" xmlns:sear=\"http://www.exlibrisgroup.com/xsd/jaguar/search\">" + " <xslutput method=\"xml\" version=\"1.0\" omit-xml-declaration=\"no\" encoding=\"UTF-8\" indent=\"yes\"/>" + " <xsl:strip-space elements=\"*\"/>" + " <sear:WhiteList>" + " <name>title</name>" + " <name>author</name>" + " </sear:WhiteList>" + " <xsl:template match=\"node()|@*\">" + " <xsl:copy>" + " <xsl:apply-templates select=\"node()|@*\"/>" + " </xsl:copy>" + " </xsl:template>" + " <xsl:template match=\"*[not(descendant-or-self::*[name()=document('')/*/sear:WhiteList/*])]\"/>" + "</xsl:stylesheet>"; StringWriter xmlResultResource = new StringWriter(); // where the transformed/stripped-down XML will be written Transformer xmlTransformer = TransformerFactory.newInstance().newTransformer(new StreamSource(new StringReader(xsltResource))); // create transformer object with XSLT given xmlTransformer.transform(new StreamSource(new StringReader(xmlSourceResource)), new StreamResult(xmlResultResource)); // transform XML with transformer and write into result StringWriter return xmlResultResource.getBuffer().toString(); // return transformed XML string }\[/code\]Unfortunately, when I run it on the server, all I get is an empty page with an empty source, as if the result of the transformation was an empty String.The server's log file first gave the following information:\[code\] [#|2012-04-26T18:26:24.967+0000|INFO|glassfish3.1.2|com.sun.jersey.api.core.PackagesResourceConfig|_ThreadID=23;_ThreadName=Thread-2;|Scanning for root resource and provider classes in the packages: dk.kb.mobileservice|#] [#|2012-04-26T18:26:24.969+0000|INFO|glassfish3.1.2|com.sun.jersey.api.core.ScanningResourceConfig|_ThreadID=23;_ThreadName=Thread-2;|Root resource classes found: class dk.kb.mobileservice.Middle|#] [#|2012-04-26T18:26:24.970+0000|INFO|glassfish3.1.2|com.sun.jersey.api.core.ScanningResourceConfig|_ThreadID=23;_ThreadName=Thread-2;|No provider classes found.|#] [#|2012-04-26T18:26:24.978+0000|INFO|glassfish3.1.2|com.sun.jersey.server.impl.application.WebApplicationImpl|_ThreadID=23;_ThreadName=Thread-2;|Initiating Jersey application, version 'Jersey: 1.11 12/09/2011 10:27 AM'|#] [#|2012-04-26T18:26:25.192+0000|INFO|glassfish3.1.2|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=23;_ThreadName=Thread-2;|WEB0671: Loading application [kb2] at [/kb2]|#] [#|2012-04-26T18:26:25.200+0000|INFO|glassfish3.1.2|javax.enterprise.system.tools.admin.org.glassfish.deployment.admin|_ThreadID=23;_ThreadName=Thread-2;|kb2 was successfully deployed in 2,293 milliseconds.|#] [#|2012-04-26T18:26:46.263+0000|SEVERE|glassfish3.1.2|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=20;_ThreadName=Thread-2;|SystemId Unknown; Line #0; Column #0; java.lang.NullPointerException |#] [#|2012-04-26T18:31:09.772+0000|SEVERE|glassfish3.1.2|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=21;_ThreadName=Thread-2;|SystemId Unknown; Line #0; Column #0; java.lang.NullPointerException |#]\[/code\]and now it returns the following issues:\[code\] [#|2012-04-27T00:05:07.731+0000|SEVERE|glassfish3.1.2|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=21;_ThreadName=Thread-2;|Error on line 1 column 1 of file:/root/webglassfish3/glassfish/domains/domain1/config/: SXXP0003: Error reported by XML parser: Content is not allowed in prolog.|#] [#|2012-04-27T00:05:07.732+0000|SEVERE|glassfish3.1.2|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=21;_ThreadName=Thread-2;|Recoverable error on line 1 SXXP0003: org.xml.sax.SAXParseException: Content is not allowed in prolog.|#]\[/code\]I've tested the XML file and transformed it via browser, and it worked, so I don't think it's the XML's nor the XSLT stylesheet's fault... It seems to be a Java issue.When I run the above Java code on the entire XML outside of GlassFish, I get the following errors:\[code\] Exception in thread "main" java.lang.VerifyError: (class: GregorSamsa$0, method: test signature: (IIIILcom/sun/org/apache/xalan/internal/xsltc/runtime/AbstractTranslet;Lcom/sun/org/apache/xml/internal/dtm/DTMAxisIteratorZ) Incompatible type for getting or setting field at GregorSamsa.applyTemplates() at GregorSamsa.applyTemplates() at GregorSamsa.transform() at com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet.transform(AbstractTranslet.java:609) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:729) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:340) at XML2JSON.cutXML(XML2JSON.java:105) at XML2JSON.main(XML2JSON.java:31)\[/code\]