com.satline.expr
Class BaseExpressionWalker<E,F>

java.lang.Object
  com.satline.expr.BaseExpressionWalker<E,F>

All Implemented Interfaces:

ExpressionWalker<E,F>

public class BaseExpressionWalker<E,F>
extends java.lang.Object
implements ExpressionWalker<E,F>

Basic expression walker implementation.

Author:

Teubner

Constructor Summary

BaseExpressionWalker()

Method Summary

E	visitAbsFunction(AbsFunctionTerm t, F arg) Visit an abs function term.
E	visitAddition(AdditionTerm t, F arg) Visit an addition term.
E	visitAndTerm(AndTerm t, F arg) Visit an and term.
protected E	visitBinaryTerm(BinaryTerm t, F arg) Visit a binary term.
E	visitBooleanConstant(java.lang.Boolean b, F arg) Visit a boolean constant.
E	visitConcatenationTerm(ConcatenationTerm t, F arg) Visit a concatenation term.
E	visitCurrentDateFunction(CurrentDateFunctionTerm t, F arg) Visit a current date function term.
E	visitDateConstant(java.util.Date d, F arg) Visit a date constant.
E	visitDivision(DivisionTerm t, F arg) Visit a division term.
E	visitEquality(EqualityTerm t, F arg) Visit an equality term.
protected E	visitFunctionCall(FunctionCall call, F arg) Visit a function call.
E	visitGreaterEqual(GreaterEqualTerm t, F arg) Visit a greater equal term.
E	visitGreaterThan(GreaterTerm t, F arg) Visit a greater than term.
E	visitInequality(InequalityTerm t, F arg) Visit an inequality term.
E	visitInTerm(InTerm t, F arg) Visit an in term.
E	visitIsNotNull(IsNotNullTerm t, F arg) Visit an is null term.
E	visitIsNull(IsNullTerm t, F arg) Visit an is null term.
E	visitLengthFunction(LengthFunctionTerm t, F arg) Visit a length function term.
E	visitLessEqual(LessEqualTerm t, F arg) Visit a less equal term.
E	visitLessThan(LessTerm t, F arg) Visit a less than term.
E	visitLikeTerm(LikeTerm t, F arg) Visit a like term.
E	visitLowerFunction(LowerFunctionTerm t, F arg) Visit a lower function term.
E	visitMatchTerm(MatchTerm t, F arg) Visit a regular expression match term.
E	visitMultiplication(MultiplicationTerm t, F arg) Visit a multiplication term.
E	visitNegation(NegationTerm t, F arg) Visit a negation term.
E	visitNotInTerm(NotInTerm t, F arg) Visit a not in term.
E	visitNotLikeTerm(NotLikeTerm t, F arg) Visit a not like term.
E	visitNumberConstant(java.lang.Number n, F arg) Visit a numeric constant.
E	visitOrTerm(OrTerm t, F arg) Visit an or term.
E	visitReplaceFunction(ReplaceFunctionTerm t, F arg) Visit a replace function term.
E	visitSignChange(SignChangeTerm t, F arg) Visit a sign change term.
E	visitStringConstant(java.lang.String s, F arg) Visit a string constant.
E	visitSubstrFunction(SubstrFunctionTerm t, F arg) Visit a substring function term.
E	visitSubtraction(SubtractionTerm t, F arg) Visit a subtraction term.
E	visitTrimFunction(TrimFunctionTerm t, F arg) Visit a trim function term.
protected E	visitUnaryTerm(UnaryTerm t, F arg) Visit a unary term.
E	visitUpperFunction(UpperFunctionTerm t, F arg) Visit a upper function term.
E	visitVariable(Variable variable, F arg) Visit a variable.

Methods inherited from class java.lang.Object

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

Constructor Detail

BaseExpressionWalker

public BaseExpressionWalker()

Method Detail

visitBooleanConstant

public E visitBooleanConstant(java.lang.Boolean b,
                              F arg)
                       throws ExpressionException

Visit a boolean constant. This implementation does nothing and returns null.

Specified by:

visitBooleanConstant in interface ExpressionWalker<E,F>

Parameters:

b - - boolean constant

arg - - implementation dependent argument

Returns:

null

Throws:

DataSourceException

ExpressionException

visitStringConstant

public E visitStringConstant(java.lang.String s,
                             F arg)
                      throws ExpressionException

Visit a string constant. This implementation does nothing and returns null.

Specified by:

visitStringConstant in interface ExpressionWalker<E,F>

Parameters:

s - - string constant

arg - - implementation dependent argument

Returns:

null

Throws:

ExpressionException

visitNumberConstant

public E visitNumberConstant(java.lang.Number n,
                             F arg)
                      throws ExpressionException

Visit a numeric constant. This implementation does nothing and returns null.

Specified by:

visitNumberConstant in interface ExpressionWalker<E,F>

Parameters:

n - - numeric constant

arg - - implementation dependent argument

Returns:

null

Throws:

ExpressionException

visitDateConstant

public E visitDateConstant(java.util.Date d,
                           F arg)
                    throws ExpressionException

Visit a date constant. This implementation does nothing and returns null.

Specified by:

visitDateConstant in interface ExpressionWalker<E,F>

Parameters:

d - - date constant

arg - - implementation dependent argument

Returns:

null

Throws:

ExpressionException

visitBinaryTerm

protected E visitBinaryTerm(BinaryTerm t,
                            F arg)
                     throws ExpressionException

Visit a binary term. This implementation visits the left and right operand and returns null.

Parameters:

t - - binary term

arg - - implementation dependent argument

Returns:

null

Throws:

ExpressionException

visitUnaryTerm

protected E visitUnaryTerm(UnaryTerm t,
                           F arg)
                    throws ExpressionException

Visit a unary term. This implementation visits the operand and returns null.

Parameters:

t - - unary term

arg - - implementation dependent argument

Returns:

null

Throws:

ExpressionException

visitVariable

public E visitVariable(Variable variable,
                       F arg)
                throws ExpressionException

Visit a variable. This implementation does nothing and returns null.

Specified by:

visitVariable in interface ExpressionWalker<E,F>

Parameters:

variable -

arg - - implementation dependent argument

Returns:

null

Throws:

ExpressionException

visitAddition

public E visitAddition(AdditionTerm t,
                       F arg)
                throws ExpressionException

Visit an addition term.

Specified by:

visitAddition in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitSubtraction

public E visitSubtraction(SubtractionTerm t,
                          F arg)
                   throws ExpressionException

Visit a subtraction term.

Specified by:

visitSubtraction in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitMultiplication

public E visitMultiplication(MultiplicationTerm t,
                             F arg)
                      throws ExpressionException

Visit a multiplication term.

Specified by:

visitMultiplication in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitDivision

public E visitDivision(DivisionTerm t,
                       F arg)
                throws ExpressionException

Visit a division term.

Specified by:

visitDivision in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitEquality

public E visitEquality(EqualityTerm t,
                       F arg)
                throws ExpressionException

Visit an equality term.

Specified by:

visitEquality in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitInequality

public E visitInequality(InequalityTerm t,
                         F arg)
                  throws ExpressionException

Visit an inequality term.

Specified by:

visitInequality in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitLessThan

public E visitLessThan(LessTerm t,
                       F arg)
                throws ExpressionException

Visit a less than term.

Specified by:

visitLessThan in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitLessEqual

public E visitLessEqual(LessEqualTerm t,
                        F arg)
                 throws ExpressionException

Visit a less equal term.

Specified by:

visitLessEqual in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitGreaterThan

public E visitGreaterThan(GreaterTerm t,
                          F arg)
                   throws ExpressionException

Visit a greater than term.

Specified by:

visitGreaterThan in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitGreaterEqual

public E visitGreaterEqual(GreaterEqualTerm t,
                           F arg)
                    throws ExpressionException

Visit a greater equal term.

Specified by:

visitGreaterEqual in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitInTerm

public E visitInTerm(InTerm t,
                     F arg)
              throws ExpressionException

Visit an in term.

Specified by:

visitInTerm in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitNotInTerm

public E visitNotInTerm(NotInTerm t,
                        F arg)
                 throws ExpressionException

Visit a not in term.

Specified by:

visitNotInTerm in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitLikeTerm

public E visitLikeTerm(LikeTerm t,
                       F arg)
                throws ExpressionException

Visit a like term.

Specified by:

visitLikeTerm in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitNotLikeTerm

public E visitNotLikeTerm(NotLikeTerm t,
                          F arg)
                   throws ExpressionException

Visit a not like term.

Specified by:

visitNotLikeTerm in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitAndTerm

public E visitAndTerm(AndTerm t,
                      F arg)
               throws ExpressionException

Visit an and term.

Specified by:

visitAndTerm in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitOrTerm

public E visitOrTerm(OrTerm t,
                     F arg)
              throws ExpressionException

Visit an or term.

Specified by:

visitOrTerm in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitConcatenationTerm

public E visitConcatenationTerm(ConcatenationTerm t,
                                F arg)
                         throws ExpressionException

Visit a concatenation term.

Specified by:

visitConcatenationTerm in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitSignChange

public E visitSignChange(SignChangeTerm t,
                         F arg)
                  throws ExpressionException

Visit a sign change term.

Specified by:

visitSignChange in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitNegation

public E visitNegation(NegationTerm t,
                       F arg)
                throws ExpressionException

Visit a negation term.

Specified by:

visitNegation in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitIsNull

public E visitIsNull(IsNullTerm t,
                     F arg)
              throws ExpressionException

Visit an is null term.

Specified by:

visitIsNull in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitIsNotNull

public E visitIsNotNull(IsNotNullTerm t,
                        F arg)
                 throws ExpressionException

Visit an is null term.

Specified by:

visitIsNotNull in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitAbsFunction

public E visitAbsFunction(AbsFunctionTerm t,
                          F arg)
                   throws ExpressionException

Visit an abs function term.

Specified by:

visitAbsFunction in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitLengthFunction

public E visitLengthFunction(LengthFunctionTerm t,
                             F arg)
                      throws ExpressionException

Visit a length function term.

Specified by:

visitLengthFunction in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitTrimFunction

public E visitTrimFunction(TrimFunctionTerm t,
                           F arg)
                    throws ExpressionException

Visit a trim function term.

Specified by:

visitTrimFunction in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitUpperFunction

public E visitUpperFunction(UpperFunctionTerm t,
                            F arg)
                     throws ExpressionException

Visit a upper function term.

Specified by:

visitUpperFunction in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitLowerFunction

public E visitLowerFunction(LowerFunctionTerm t,
                            F arg)
                     throws ExpressionException

Visit a lower function term.

Specified by:

visitLowerFunction in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitSubstrFunction

public E visitSubstrFunction(SubstrFunctionTerm t,
                             F arg)
                      throws ExpressionException

Visit a substring function term.

Specified by:

visitSubstrFunction in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitMatchTerm

public E visitMatchTerm(MatchTerm t,
                        F arg)
                 throws ExpressionException

Description copied from interface: ExpressionWalker

Visit a regular expression match term.

Specified by:

visitMatchTerm in interface ExpressionWalker<E,F>

Returns:

Throws:

ExpressionException

visitReplaceFunction

public E visitReplaceFunction(ReplaceFunctionTerm t,
                              F arg)
                       throws ExpressionException

Description copied from interface: ExpressionWalker

Visit a replace function term.

Specified by:

visitReplaceFunction in interface ExpressionWalker<E,F>

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitCurrentDateFunction

public E visitCurrentDateFunction(CurrentDateFunctionTerm t,
                                  F arg)
                           throws ExpressionException

Visit a current date function term.

Specified by:

visitCurrentDateFunction in interface ExpressionWalker<E,F>

Parameters:

t -

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

visitFunctionCall

protected E visitFunctionCall(FunctionCall call,
                              F arg)
                       throws ExpressionException

Visit a function call. This implementation visits all arguments and returns null.

Parameters:

call - - function call

arg - - implementation dependent argument

Returns:

null

Throws:

ExpressionException