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 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.

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, @Nullable 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

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,
                    @Nullable 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>