com.mapr.ojai.store.impl

Class ExpressionVisitor

java.lang.Object

com.mapr.ojai.store.impl.ExpressionVisitor

Direct Known Subclasses:

ExpressionPruner, ExpressionToCondition, ExpressionToSql

public abstract class ExpressionVisitor
extends java.lang.Object

Abstract class for visiting an Expression tree.

Constructor Summary

Constructors

Constructor and Description
ExpressionVisitor()

Method Summary

Modifier and Type	Method and Description
void	visitField(FieldExpression fieldExpr) Visit a FieldExpression.
void	visitLiteral(LiteralExpression literalExpr) Visit a LiteralExpression.
void	visitNary(NaryOperator naryOp) Visit a NaryOperator.
void	visitRelational(RelationalOperator relOp) Visit a RelationalOperator.
void	visitUnary(UnaryOperator unaryOp) Visit a UnaryOperator.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionVisitor

public ExpressionVisitor()

Method Detail

visitField

public void visitField(FieldExpression fieldExpr)

Visit a FieldExpression.

Parameters:

fieldExpr - the field expression

visitLiteral

public void visitLiteral(LiteralExpression literalExpr)

Visit a LiteralExpression.

Parameters:

literalExpr - the literal expression

visitNary

public void visitNary(NaryOperator naryOp)

Visit a NaryOperator.

Parameters:

naryOp - the n-ary operator

visitRelational

public void visitRelational(RelationalOperator relOp)

Visit a RelationalOperator. The default behavior is to call visitNary(NaryOperator). This only needs to be overriden if relational operators need different treatment.

Parameters:

relOp - the relational operator

visitUnary

public void visitUnary(UnaryOperator unaryOp)

Visit a UnaryOperator.

Parameters:

unaryOp - the unary operator