Re: How to convert Map to xml based on Schema.

From:
=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>
Newsgroups:
comp.lang.java.programmer
Date:
Sun, 18 Nov 2012 16:15:21 -0500
Message-ID:
<50a94fea$0$292$14726298@news.sunsite.dk>
On 11/17/2012 1:52 AM, Mausam wrote:

I have a Map (it can be nested map, containing of maps) and a schema. Keys in Map represent element/attribute name of the schema and an entry in Map will be at same depth as an element defined in schema

I need help in generating xml from the map as per the schema provided, without generating new files (as e.g Jaxb would require) Sample schema/map provided below

e.g Map = [dept=[deptno="10",dname="ABC",loc="XYZ",emps=[[empno=1000,ename="Albert"],[empno 00,ename="John"]]]] and schema will be

e.g Schema
<?xml version="1.0" encoding="windows-1252" ?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
   <xsd:element name="depts">
     <xsd:complexType>
       <xsd:sequence>
         <xsd:element name="dept" maxOccurs="unbounded">
           <xsd:complexType>
             <xsd:sequence>
               <xsd:element name="deptno" type="xsd:string"/><!-- This simple element e.g can be attribute in some schema-->
               <xsd:element name="dname" type="xsd:string"/>
               <xsd:element name="emps" maxOccurs="unbounded" minOccurs="0">
                 <xsd:complexType>
                   <xsd:sequence>
                     <xsd:element name="empno" type="xsd:string"/>
                     <xsd:element name="ename" type="xsd:string"/>
                   </xsd:sequence>
                 </xsd:complexType>
               </xsd:element>
             </xsd:sequence>
           </xsd:complexType>
         </xsd:element>
       </xsd:sequence>
     </xsd:complexType>
   </xsd:element>
</xsd:schema>


I would probably:
- generate a Java class from the schema (xjc)
- populate from Map to an instance of that class via recursion
   and reflection
- serialize instance to XML via JAXB

If you have high performance requirements, then you may need
to do some custom coding.

Arne

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