org.apache.drill.common.expression.visitors

Class AbstractExprVisitor<T,VAL,EXCEP extends Exception>

java.lang.Object

org.apache.drill.common.expression.visitors.AbstractExprVisitor<T,VAL,EXCEP>

All Implemented Interfaces:

ExprVisitor<T,VAL,EXCEP>

Direct Known Subclasses:

AbstractExecExprVisitor, CloneVisitor, CompareFunctionsProcessor, ConditionalExprOptimizer, DruidCompareFunctionProcessor, DruidFilterBuilder, ExpressionStringBuilder, ExprToRex, FilterBuilder, FilterEvaluatorUtils.FieldReferenceFinder, HashVisitor, HBaseFilterBuilder, InfoSchemaFilterBuilder, InterpreterEvaluator.EvalVisitor, JsonConditionBuilder, KafkaPartitionScanSpecBuilder, MapRDBFilterBuilder, MongoCompareFunctionProcessor, MongoFilterBuilder, PathInExpr, StatisticsProvider

public abstract class AbstractExprVisitor<T,VAL,EXCEP extends Exception>
extends Object
implements ExprVisitor<T,VAL,EXCEP>

Constructor Summary

Constructors

Constructor and Description
AbstractExprVisitor()

Method Summary

Modifier and Type	Method and Description
T	visitAnyValueExpression(AnyValueExpression e, VAL value)
T	visitBooleanConstant(ValueExpressions.BooleanExpression e, VAL value)
T	visitBooleanOperator(BooleanOperator op, VAL value)
T	visitCastExpression(CastExpression e, VAL value)
T	visitConvertExpression(ConvertExpression e, VAL value)
T	visitDateConstant(ValueExpressions.DateExpression intExpr, VAL value)
T	visitDecimal18Constant(ValueExpressions.Decimal18Expression decExpr, VAL value)
T	visitDecimal28Constant(ValueExpressions.Decimal28Expression decExpr, VAL value)
T	visitDecimal38Constant(ValueExpressions.Decimal38Expression decExpr, VAL value)
T	visitDecimal9Constant(ValueExpressions.Decimal9Expression decExpr, VAL value)
T	visitDoubleConstant(ValueExpressions.DoubleExpression dExpr, VAL value)
T	visitFloatConstant(ValueExpressions.FloatExpression fExpr, VAL value)
T	visitFunctionCall(FunctionCall call, VAL value)
T	visitFunctionHolderExpression(FunctionHolderExpression holder, VAL value)
T	visitIfExpression(IfExpression ifExpr, VAL value)
T	visitIntConstant(ValueExpressions.IntExpression intExpr, VAL value)
T	visitIntervalDayConstant(ValueExpressions.IntervalDayExpression intExpr, VAL value)
T	visitIntervalYearConstant(ValueExpressions.IntervalYearExpression intExpr, VAL value)
T	visitLongConstant(ValueExpressions.LongExpression intExpr, VAL value)
T	visitNullConstant(TypedNullConstant e, VAL value)
T	visitNullExpression(NullExpression e, VAL value)
T	visitParameter(ValueExpressions.ParameterExpression e, VAL value)
T	visitQuotedStringConstant(ValueExpressions.QuotedString e, VAL value)
T	visitSchemaPath(SchemaPath path, VAL value)
T	visitTimeConstant(ValueExpressions.TimeExpression intExpr, VAL value)
T	visitTimeStampConstant(ValueExpressions.TimeStampExpression intExpr, VAL value)
T	visitTypedFieldExpr(TypedFieldExpr e, VAL value)
T	visitUnknown(LogicalExpression e, VAL value) Handles implementation-specific expressions not known to the visitor structure.
T	visitVarDecimalConstant(ValueExpressions.VarDecimalExpression decExpr, VAL value)

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractExprVisitor

public AbstractExprVisitor()

Method Detail

visitFunctionCall

public T visitFunctionCall(FunctionCall call,
                           VAL value)
                    throws EXCEP extends Exception

Specified by:

visitFunctionCall in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitFunctionHolderExpression

public T visitFunctionHolderExpression(FunctionHolderExpression holder,
                                       VAL value)
                                throws EXCEP extends Exception

Specified by:

visitFunctionHolderExpression in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitIfExpression

public T visitIfExpression(IfExpression ifExpr,
                           VAL value)
                    throws EXCEP extends Exception

Specified by:

visitIfExpression in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitBooleanOperator

public T visitBooleanOperator(BooleanOperator op,
                              VAL value)
                       throws EXCEP extends Exception

Specified by:

visitBooleanOperator in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitSchemaPath

public T visitSchemaPath(SchemaPath path,
                         VAL value)
                  throws EXCEP extends Exception

Specified by:

visitSchemaPath in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitFloatConstant

public T visitFloatConstant(ValueExpressions.FloatExpression fExpr,
                            VAL value)
                     throws EXCEP extends Exception

Specified by:

visitFloatConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitIntConstant

public T visitIntConstant(ValueExpressions.IntExpression intExpr,
                          VAL value)
                   throws EXCEP extends Exception

Specified by:

visitIntConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitLongConstant

public T visitLongConstant(ValueExpressions.LongExpression intExpr,
                           VAL value)
                    throws EXCEP extends Exception

Specified by:

visitLongConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitDecimal9Constant

public T visitDecimal9Constant(ValueExpressions.Decimal9Expression decExpr,
                               VAL value)
                        throws EXCEP extends Exception

Specified by:

visitDecimal9Constant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitDecimal18Constant

public T visitDecimal18Constant(ValueExpressions.Decimal18Expression decExpr,
                                VAL value)
                         throws EXCEP extends Exception

Specified by:

visitDecimal18Constant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitDecimal28Constant

public T visitDecimal28Constant(ValueExpressions.Decimal28Expression decExpr,
                                VAL value)
                         throws EXCEP extends Exception

Specified by:

visitDecimal28Constant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitDecimal38Constant

public T visitDecimal38Constant(ValueExpressions.Decimal38Expression decExpr,
                                VAL value)
                         throws EXCEP extends Exception

Specified by:

visitDecimal38Constant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitVarDecimalConstant

public T visitVarDecimalConstant(ValueExpressions.VarDecimalExpression decExpr,
                                 VAL value)
                          throws EXCEP extends Exception

Specified by:

visitVarDecimalConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitDateConstant

public T visitDateConstant(ValueExpressions.DateExpression intExpr,
                           VAL value)
                    throws EXCEP extends Exception

Specified by:

visitDateConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitTimeConstant

public T visitTimeConstant(ValueExpressions.TimeExpression intExpr,
                           VAL value)
                    throws EXCEP extends Exception

Specified by:

visitTimeConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitTimeStampConstant

public T visitTimeStampConstant(ValueExpressions.TimeStampExpression intExpr,
                                VAL value)
                         throws EXCEP extends Exception

Specified by:

visitTimeStampConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitIntervalYearConstant

public T visitIntervalYearConstant(ValueExpressions.IntervalYearExpression intExpr,
                                   VAL value)
                            throws EXCEP extends Exception

Specified by:

visitIntervalYearConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitIntervalDayConstant

public T visitIntervalDayConstant(ValueExpressions.IntervalDayExpression intExpr,
                                  VAL value)
                           throws EXCEP extends Exception

Specified by:

visitIntervalDayConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitDoubleConstant

public T visitDoubleConstant(ValueExpressions.DoubleExpression dExpr,
                             VAL value)
                      throws EXCEP extends Exception

Specified by:

visitDoubleConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitBooleanConstant

public T visitBooleanConstant(ValueExpressions.BooleanExpression e,
                              VAL value)
                       throws EXCEP extends Exception

Specified by:

visitBooleanConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitQuotedStringConstant

public T visitQuotedStringConstant(ValueExpressions.QuotedString e,
                                   VAL value)
                            throws EXCEP extends Exception

Specified by:

visitQuotedStringConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitCastExpression

public T visitCastExpression(CastExpression e,
                             VAL value)
                      throws EXCEP extends Exception

Specified by:

visitCastExpression in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitConvertExpression

public T visitConvertExpression(ConvertExpression e,
                                VAL value)
                         throws EXCEP extends Exception

Specified by:

visitConvertExpression in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitAnyValueExpression

public T visitAnyValueExpression(AnyValueExpression e,
                                 VAL value)
                          throws EXCEP extends Exception

Specified by:

visitAnyValueExpression in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitNullConstant

public T visitNullConstant(TypedNullConstant e,
                           VAL value)
                    throws EXCEP extends Exception

Specified by:

visitNullConstant in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitNullExpression

public T visitNullExpression(NullExpression e,
                             VAL value)
                      throws EXCEP extends Exception

Specified by:

visitNullExpression in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitUnknown

public T visitUnknown(LogicalExpression e,
                      VAL value)
               throws EXCEP extends Exception

Handles implementation-specific expressions not known to the visitor structure. Since there are no "visitFoo" methods for these "unknown" expressions, subclassses should use the functionally-equivalent instanceof approach to parse out these "unknown" expressions.

Specified by:

visitUnknown in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitParameter

public T visitParameter(ValueExpressions.ParameterExpression e,
                        VAL value)
                 throws EXCEP extends Exception

Specified by:

visitParameter in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception

visitTypedFieldExpr

public T visitTypedFieldExpr(TypedFieldExpr e,
                             VAL value)
                      throws EXCEP extends Exception

Specified by:

visitTypedFieldExpr in interface ExprVisitor<T,VAL,EXCEP extends Exception>

Throws:

EXCEP extends Exception