XML Schema parser

[hixhix]

Hi,

I'm using Java to develop a XML-related application. One thing I need to do is that, given a XML Schema, I need to find all the element names and their types, attributes and types of attributes.

For example, if the given schema is

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="

http://www.w3.org/2001/XMLSchema">

<xs:element name="enterprise" type="EnterpriseType"/>

<xs:complexType name="EnterpriseType">
<xs:sequence>
<xs:element name="d1" type="DepartmentType"/>
<xs:element name="d2" type="DepartmentType"/>
</xs:sequence>
</xs:complexType>

<xs:complexType name="DepartmentType">
<xs:sequence>
<xs:element name="employee" type="xs:string" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute name="name" type="xs:string"/>
</xs:complexType>

</xs:schema>

Then all the elelements are:

enterprise (Type: EnterpriseType)
d1 (Type: DepartmentType, Attribute: name (Type: xs:string))
d2 (Type: DepartmentType, Attribute: name (Type: xs:string))
employee (Type: xs:string)

I tried XSOM but it only iterates the top-level elelmenents/types in the schema, I couldnt go to lower level of the schema tree.

Anyone know how I could solve this problem ? Thank you very much.

 

[k5tm]

I am certainly no expert, but I think XSOM and the XSSchemaSet object model have everything you need.

So, a higher level question: Why are you trying to do this? (Perhaps there's a better way than grinding on the XML Schema definition.)

Tom Morrison

http://www.liant.com

 

[hixhix]

I tried to use XSSchemaSet, but I can iterates all the top-level component in the set only using iterateAttGroupDecls(), iterateAttributeDecls()
iterateComplexTypes(), iterateElementDecls()... and such APIs. I could access to the lower-level components.

I'm looking for something like getChildNodes() in order to go further but I couldnt find such API.

The reason I need to do things like this is because I'm implementing some algorithm on XML. The algorithm reads the schema, read user-defined rules indicating which components to be encrypted. Then it reads a valid XML document against the schema, follows the rules and encrypt some specific components in the XML document.