i have situation have 2 structurally different xml's , need extract data these (at time xml needs parsed) , submit logic , fill common format.
<xml1> <a>hello</a> <b>shreyas</b> <c>123</c> </xml1> and
<xml2> <d> <name> <my>hello</my> </name> </d> <e>shreyas</e> <f>124</f> </xml2> and common object fill
public class gobj { string fname; string lname; string id; } i looking kind of run time annotations resolver. tried jaxbintros implemented jboss on top of jaxb , not find xpath support it.
also problem can solved using basic sax parser, wanted method jaxb etc.,. readability of code can easy.
-thanks shreyas
note: i'm eclipselink jaxb (moxy) lead , member of jaxb (jsr-222) expert group.
below how support use case using moxy's external mapping file extension.
metadata xml 1
we use standard jaxb annotations map gobj class first xml representation.
package forum17652921; import javax.xml.bind.annotation.*; @xmlrootelement(name="xml1") @xmlaccessortype(xmlaccesstype.field) public class gobj { @xmlelement(name="a") string fname; @xmlelement(name="b") string lname; @xmlelement(name="c") string id; } metadata xml 2
we use moxy's external mapping document map same class second xml representation. default mapping document used augment metadata supplied annotations. if set xml-metadata-complete flag true can replace metadata.
<?xml version="1.0"?> <xml-bindings xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm" package-name="forum17652921" xml-accessor-type="field" xml-mapping-metadata-complete="true"> <java-types> <java-type name="gobj"> <xml-root-element name="xml2"/> <java-attributes> <xml-element java-attribute="fname" xml-path="d/name/my/text()"/> <xml-element java-attribute="lname" name="e"/> <xml-element java-attribute="id" name="f"/> </java-attributes> </java-type> </java-types> </xml-bindings> demo
in demo code below there 2 instances of jaxbcontext. use first read xml representation 1 instance of gobj. use second jaxbcontext marshal same instance of gobj second xml representation.
package forum17652921; import java.io.file; import java.util.*; import javax.xml.bind.*; import org.eclipse.persistence.jaxb.jaxbcontextproperties; public class demo { public static void main(string[] args) throws exception { jaxbcontext jc1 = jaxbcontext.newinstance(gobj.class); unmarshaller unmarshaller = jc1.createunmarshaller(); file xml = new file("src/forum17652921/xml1.xml"); gobj gobj = (gobj) unmarshaller.unmarshal(xml); map<string, object> properties = new hashmap<string, object>(1); properties.put(jaxbcontextproperties.oxm_metadata_source, "forum17652921/oxm.xml"); jaxbcontext jc2 = jaxbcontext.newinstance(new class[] {gobj.class}, properties); marshaller marshaller = jc2.createmarshaller(); marshaller.setproperty(marshaller.jaxb_formatted_output, true); marshaller.marshal(gobj, system.out); } } xml1.xml
<xml1> <a>hello</a> <b>shreyas</b> <c>123</c> </xml1> output
<?xml version="1.0" encoding="utf-8"?> <xml2> <d> <name> <my>hello</my> </name> </d> <e>shreyas</e> <f>123</f> </xml2> for more information
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