Element type(long) without content

问题:

My schema is:

 <xsd:element name="SetMonitor">
    <xsd:complexType>
        <xsd:sequence>
            <xsd:element name="period" type="xsd:long" />
            <xsd:element name="refreshrate" type="xsd:long" />
        </xsd:sequence>
    </xsd:complexType>
</xsd:element>

And my xml will be:

Case 1.

<SetMonitor
    xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/"
    xmlns:cb="http://schemas.cordys.com/1.0/coboc">
    <period/>
    <refreshrate/>
</SetMonitor>

OR Case 2.

 <SetMonitor
        xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/"
        xmlns:cb="http://schemas.cordys.com/1.0/coboc">
        <period>10</period>
        <refreshrate>20</refreshrate>
    </SetMonitor>

For case 2 there are no issues. But for case 1 I get the following error:

Caused by: org.xml.sax.SAXException: cvc-datatype-valid.1.2.1: '' is not a valid value for 'integer'.
org.xml.sax.SAXParseException; lineNumber: 6; columnNumber: 14; cvc-datatype-valid.1.2.1: '' is not a valid value for 'integer'.

How can i modify the wsdl so that it accepts both case 1 and case 2? Please help.

回答1:

You could do something like this:

    <xsd:element name="SetMonitor">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element name="period" type="xsd:long"  nillable="true"/>
                <xsd:element name="refreshrate" type="xsd:long" nillable="true"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>

And construct xml with "empty" element in this way

<SetMonitor xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <period>2147483647</period>
    <refreshrate xsi:nil="true" />
</SetMonitor>

Or you could modify the type of element using pattern, something like this

<xsd:element name="period">
    <xsd:simpleType>
        <xsd:restriction base="xsd:string">
            <xsd:pattern value="|([1-9][0-9]*)" />
        </xsd:restriction>
    </xsd:simpleType>
</xsd:element>

(the pattern has to be define more precisly, than I use for this example)

Another possibility could be to define simpleType for empty string

<xsd:simpleType name="emptyString">
    <xsd:restriction base="xsd:string">
        <xsd:length value="0"/>
    </xsd:restriction>
</xsd:simpleType>

and then define your element as union of xsd:long and emptyString type

<xsd:element name="period">
    <xsd:simpleType>
        <xsd:union memberTypes="xsd:long emptyString"/>
    </xsd:simpleType>
</xsd:element>