AW: About Accessing DataObjects using XPath

[Millies, Sebastian]

Hello there,

what exactly is not working for you? When posting questions like this, it is 
always helpful to include an error
message, perhaps even a stacktrace. (Also, I might add, it would be considered 
good form to sign your mail
by name.)

Your example works for me, here's a test case demonstrating it:

        @Test
        public void test()
        {
                HelperContext scope = HelperProvider.getDefaultContext();
                DataFactory df = scope.getDataFactory();
                DataObject deliverGoods = df.create( "http://dataact.act.org";, 
"deliverGoods" );
                DataObject deliord = df.create( "http://dataact.act.org/xsd";, 
"DeliverOrder" );
                deliord.setDouble( "cost", 100 );
                deliverGoods.set( "deliord", deliord );

                DataObject sdo = deliverGoods.getDataObject( "deliord" );
                double actual = sdo.getDouble( "cost" );
                assertEquals( 100, actual, 0.0001 );

                double actualXPath = deliverGoods.getDouble( "deliord/cost" );  
// <---
                assertEquals( 100, actualXPath, 0.0001 );
        }

If you're getting a NullPointerException, perhaps you have not instantiated the 
"deliord" attribute?

Regards,
Sebastian

----------------- 8< ------------------

Von: grovecai [mailto:grove...@gmail.com]
Gesendet: Donnerstag, 28. März 2013 10:16
An: user@tuscany.apache.org
Betreff: About Accessing DataObjects using XPath

Hi,guys

I have a DataObject as below and it's Type is defined in two schema with 
different targetNamespace.
Now  I want to access the "cost" property of the DataObject.The code is like 
that:
DataObject.get("deliord/cost");
It doesn't work. What's proper xpath expression I should use?
Please help. Thanks!

DataObject:
<dat:deliverGoods xmlns:dat="http://dataact.act.org"; 
xmlns:xsd="http://dataact.act.org/xsd";>
   <dat:deliord>
      <xsd:cost>100</xsd:cost>
      <xsd:id>101</xsd:id>
      <xsd:address>buaa nmb g513</xsd:address>
      <xsd:buyer>cai</xsd:buyer>
      <xsd:goodname>The WS Haters Handbook</xsd:goodname>
   </dat:deliord>
</dat:deliverGoods>

Schema_1:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
    xmlns:ax26="http://dataact.act.org/xsd"; 
targetNamespace="http://dataact.act.org";>
    <xs:import namespace="http://dataact.act.org/xsd"; />
    <xs:element name="deliverGoods">
        <xs:complexType>
            <xs:sequence>
                <xs:element minOccurs="0" name="deliord" nillable="true"
                    type="ax26:DeliverOrder" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>

Schema_2:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
    targetNamespace="http://dataact.act.org/xsd";>
    <xs:complexType name="DeliverOrder">
        <xs:sequence>
            <xs:element minOccurs="0" name="address" nillable="true"
                type="xs:string" />
            <xs:element minOccurs="0" name="buyer" nillable="true"
                type="xs:string" />
            <xs:element minOccurs="0" name="cost" type="xs:double" />
            <xs:element minOccurs="0" name="goodname" nillable="true"
                type="xs:string" />
            <xs:element minOccurs="0" name="id" type="xs:int" />
        </xs:sequence>
    </xs:complexType>
</xs:schema>




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