how to call method using spring? - spring

Question

I want to call a method after creating the bean using spring, for example I create Factory and schema but I want to call the same method of Factory before creating a schema bean
<!-- schemaFactory-->
<bean id="schemaFact" class="javax.xml.validation.SchemaFactory"
factory-method="newInstance">
<constructor-arg value="http://www.w3.org/2001/XMLSchema" />
</bean>
<!-- schema -->
<bean id="schema" class="javax.xml.validation.Schema"
factory-bean="schemaFact" factory-method="newSchema">
<constructor-arg value="3DSecure.xsd" />
</bean>

Answer 1

You could use your own factory bean instead of javax.xml.validation.SchemaFactory, which will delegate to javax.xml.validation.SchemaFactory and the call the method:
public class MySchemaFactory {
public SchemaFactory newInstance() {
SchemaFactory factory = SchemaFactory.newInstance();
factory.callSomeMethod();
return factory;
}
}
<bean id="mySchemaFactory" class="com.foo.bar.MySchemaFactory"/>
<bean id="schemaFact"
factory-bean="mySchemaFactory"
factory-method="newInstance"/>

Answer 2

If you are using Spring 3.0/3.1 you can take advantage of Java configuration:
#Configuration
class Config {
#Bean
public SchemaFactory schemaFact() throws SAXNotSupportedException, SAXNotRecognizedException {
final SchemaFactory schemaFactory = SchemaFactory.newInstance("http://www.w3.org/2001/XMLSchema");
schemaFactory.setFeature("apache.org/xml/features/validation/schema-full-checking", false);
return schemaFactory;
}
#Bean
public Schema schema() throws SAXException {
return schemaFact().newSchema(new File("3DSecure.xsd"));
}
}
But which method on SchemaFactory do you want to call? Seems like all of them are either getters or setters, so you can use normal XML injection... Alternatively create your own FactoryBean:
class SchemaFactoryFactoryBean implements FactoryBean<SchemaFactory> {
#Override
public SchemaFactory getObject() throws Exception
{
final SchemaFactory schemaFactory = SchemaFactory.newInstance("http://www.w3.org/2001/XMLSchema");
schemaFactory.setFeature("apache.org/xml/features/validation/schema-full-checking", false);
return schemaFactory;
}
#Override
public Class<?> getObjectType()
{
return SchemaFactory.class;
}
#Override
public boolean isSingleton()
{
return true;
}
}
And use it like this (no factory-method needed):
<bean id="schemaFact" class="SchemaFactoryFactoryBean"/>