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Validating XML with a W3C XML Schema
This example assumes the following class is already on your CLASSPATH:
XmlExamples.groovy
class XmlExamples {
static def CAR_RECORDS = '''
<records>
<car name='HSV Maloo' make='Holden' year='2006'>
<country>Australia</country>
<record type='speed'>Production Pickup Truck with speed of 271kph</record>
</car>
<car name='P50' make='Peel' year='1962'>
<country>Isle of Man</country>
<record type='size'>Smallest Street-Legal Car at 99cm wide and 59 kg in weight</record>
</car>
<car name='Royale' make='Bugatti' year='1931'>
<country>France</country>
<record type='price'>Most Valuable Car at $15 million</record>
</car>
</records>
'''
}We can validate that segment of XML against a Schema with the following code:
def xsd = '''
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
<xs:element name="records">
<xs:complexType>
<xs:sequence>
<xs:element maxOccurs="unbounded" ref="car"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="car">
<xs:complexType>
<xs:sequence>
<xs:element ref="country"/>
<xs:element ref="record"/>
</xs:sequence>
<xs:attribute name="make" use="required" type="xs:NCName"/>
<xs:attribute name="name" use="required"/>
<xs:attribute name="year" use="required" type="xs:integer"/>
</xs:complexType>
</xs:element>
<xs:element name="country" type="xs:string"/>
<xs:element name="record">
<xs:complexType mixed="true">
<xs:attribute name="type" use="required" type="xs:NCName"/>
</xs:complexType>
</xs:element>
</xs:schema>
'''.trim()
import javax.xml.XMLConstants
import javax.xml.transform.stream.StreamSource
import javax.xml.validation.SchemaFactory
def factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI)
def schema = factory.newSchema(new StreamSource(new StringReader(xsd)))
def validator = schema.newValidator()
validator.validate(new StreamSource(new StringReader(XmlExamples.CAR_RECORDS)))
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