org.apache.beam.sdk.schemas.annotations

Annotation Type DefaultSchema

@Documented
 @Retention(value=RUNTIME)
 @Target(value=TYPE)
 @Experimental(value=SCHEMAS)
public @interface DefaultSchema

The DefaultSchema annotation specifies a SchemaProvider class to handle obtaining a schema and row for the specified class.

For example, if your class is JavaBean, the JavaBeanSchema provider class knows how to vend schemas for this class. You can annotate it as follows:

 @DefaultSchema(JavaBeanSchema.class)
 class MyClass {
   public String getFoo();
   void setFoo(String foo);
         ....
 }
 

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
java.lang.Class<? extends SchemaProvider>	value The schema provider implementation that knows how to vend schemas for the annotated class.

Element Detail

value

@CheckForNull
public abstract java.lang.Class<? extends SchemaProvider> value

The schema provider implementation that knows how to vend schemas for the annotated class.