org.apache.avro.compiler.schema

Class CloningVisitor

java.lang.Object

org.apache.avro.compiler.schema.CloningVisitor

All Implemented Interfaces:

SchemaVisitor<Schema>

public final class CloningVisitor
extends Object
implements SchemaVisitor<Schema>

this visitor will create a clone of the original Schema with docs and other nonessential fields stripped by default. what attributes are copied is customizable.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	CloningVisitor.PropertyCopier

Constructor Summary

Constructors

Constructor and Description
CloningVisitor(CloningVisitor.PropertyCopier copyProperties, boolean copyDocs, Schema root)
CloningVisitor(Schema root) copy only serialization necessary fields.

Method Summary

Modifier and Type	Method and Description
SchemaVisitorAction	afterVisitNonTerminal(Schema nt) Invoked for schemas with children after its children have been visited.
Schema	get() Invoked when visiting is complete.
String	toString()
SchemaVisitorAction	visitNonTerminal(Schema nt) Invoked for schema with children before proceeding to visit the children.
SchemaVisitorAction	visitTerminal(Schema terminal) Invoked for schemas that do not have "child" schemas (like string, int ...) or for a previously encountered schema with children, which will be treated as a terminal.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CloningVisitor

public CloningVisitor(Schema root)

copy only serialization necessary fields.

Parameters:

root -

CloningVisitor

public CloningVisitor(CloningVisitor.PropertyCopier copyProperties,
                      boolean copyDocs,
                      Schema root)

Method Detail

visitTerminal

public SchemaVisitorAction visitTerminal(Schema terminal)

Description copied from interface: SchemaVisitor

Invoked for schemas that do not have "child" schemas (like string, int ...) or for a previously encountered schema with children, which will be treated as a terminal. (to avoid circular recursion)

Specified by:

visitTerminal in interface SchemaVisitor<Schema>

Returns:

visitNonTerminal

public SchemaVisitorAction visitNonTerminal(Schema nt)

Description copied from interface: SchemaVisitor

Invoked for schema with children before proceeding to visit the children.

Specified by:

visitNonTerminal in interface SchemaVisitor<Schema>

Returns:

afterVisitNonTerminal

public SchemaVisitorAction afterVisitNonTerminal(Schema nt)

Description copied from interface: SchemaVisitor

Invoked for schemas with children after its children have been visited.

Specified by:

afterVisitNonTerminal in interface SchemaVisitor<Schema>

Returns:

get

public Schema get()

Description copied from interface: SchemaVisitor

Invoked when visiting is complete.

Specified by:

get in interface SchemaVisitor<Schema>

Returns:

a value which will be returned by the visit method.

toString

public String toString()

Overrides:

toString in class Object