org.apache.calcite.sql.util

Class SqlBasicVisitor.ArgHandlerImpl<R>

java.lang.Object

org.apache.calcite.sql.util.SqlBasicVisitor.ArgHandlerImpl<R>

Type Parameters:

R - result type

All Implemented Interfaces:

SqlBasicVisitor.ArgHandler<R>

Enclosing class:

SqlBasicVisitor<R>

public static class SqlBasicVisitor.ArgHandlerImpl<R>
extends java.lang.Object
implements SqlBasicVisitor.ArgHandler<R>

Default implementation of SqlBasicVisitor.ArgHandler which merely calls SqlNode.accept(org.apache.calcite.sql.util.SqlVisitor<R>) on each operand.

Field Summary

Fields

Modifier and Type	Field and Description
private static SqlBasicVisitor.ArgHandler	INSTANCE

Constructor Summary

Constructors

Constructor and Description
ArgHandlerImpl()

Method Summary

Modifier and Type	Method and Description
static <R> SqlBasicVisitor.ArgHandler<R>	instance()
R	result() Returns the result of visiting all children of a call to an operator, then the call itself.
R	visitChild(SqlVisitor<R> visitor, SqlNode expr, int i, SqlNode operand) Visits a particular operand of a call, using a given visitor.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

private static final SqlBasicVisitor.ArgHandler INSTANCE

Constructor Detail

ArgHandlerImpl

public ArgHandlerImpl()

Method Detail

instance

public static <R> SqlBasicVisitor.ArgHandler<R> instance()

result

public R result()

Description copied from interface: SqlBasicVisitor.ArgHandler

Returns the result of visiting all children of a call to an operator, then the call itself.

Typically the result will be the result of the last child visited, or (if R is Boolean) whether all children were visited successfully.

Specified by:

result in interface SqlBasicVisitor.ArgHandler<R>

visitChild

public R visitChild(SqlVisitor<R> visitor,
                    SqlNode expr,
                    int i,
                    SqlNode operand)

Description copied from interface: SqlBasicVisitor.ArgHandler

Visits a particular operand of a call, using a given visitor.

Specified by:

visitChild in interface SqlBasicVisitor.ArgHandler<R>