com.luciad.expressions

Interface IExpressionVisitor

public interface IExpressionVisitor

Expression visitor interface that allows traversal of an Expression or a Condition.

The responsibility for the traversal algorithm is within the visitor. Have a look at Expressions and Conditions section for an example.

Method Summary

Modifier and Type	Method and Description
void	visitAnd(List<Expression> conditions) Visits a logical and operation.
void	visitBBox(Expression expression) Visits a bbox expression.
void	visitBBox(Expression left, Expression right) Visits a bbox expression.
void	visitEqual(Expression left, Expression right) Visits an 'equal' condition.
void	visitGt(Expression left, Expression right) Visits a 'greater than' condition.
void	visitGte(Expression left, Expression right) Visits a 'greater than or equal' condition.
void	visitLike(String propertyPath, String pattern, boolean matchCase, char wildCard, char singleChar, char escapeChar) Visits a like expression.
void	visitLiteral(ExpressionValue value) Visits a 'literal' value.
void	visitLt(Expression left, Expression right) Visits a 'less than' condition.
void	visitLte(Expression left, Expression right) Visits a 'less than or equal' condition.
void	visitNot(Expression condition) Visits a logical 'not' operation.
void	visitNotEqual(Expression left, Expression right) Visits a 'not equal' condition.
void	visitOr(List<Expression> conditions) Visits a logical or operation.
void	visitValueReference(String propertyPath) Visits a reference to a property.

Method Detail

visitLiteral

void visitLiteral(@NotNull
                  ExpressionValue value)

Visits a 'literal' value.

Parameters:

value - the literal value.

See Also:

ExpressionFactory#literal

visitValueReference

void visitValueReference(@NotNull
                         String propertyPath)

Visits a reference to a property.

Parameters:

propertyPath - the path to the property.

See Also:

ExpressionFactory#valueReference

visitAnd

void visitAnd(@NotNull
              List<Expression> conditions)

Visits a logical and operation.

Parameters:

conditions - the list of conditions.

See Also:

ExpressionFactory#andOp

visitOr

void visitOr(@NotNull
             List<Expression> conditions)

Visits a logical or operation.

Parameters:

conditions - the list of conditions.

See Also:

ExpressionFactory#orOp

visitNot

void visitNot(@NotNull
              Expression condition)

Visits a logical 'not' operation.

Parameters:

condition - the condition that is inverted.

See Also:

ExpressionFactory#notOp

visitEqual

void visitEqual(@NotNull
                Expression left,
                @NotNull
                Expression right)

Visits an 'equal' condition.

Parameters:

left - the left expression.

right - the right expression.

See Also:

ExpressionFactory#equal

visitNotEqual

void visitNotEqual(@NotNull
                   Expression left,
                   @NotNull
                   Expression right)

Visits a 'not equal' condition.

Parameters:

left - the left expression.

right - the right expression.

See Also:

ExpressionFactory#notEqual

visitGt

void visitGt(@NotNull
             Expression left,
             @NotNull
             Expression right)

Visits a 'greater than' condition.

Parameters:

left - the left expression.

right - the right expression.

See Also:

ExpressionFactory#gt

visitGte

void visitGte(@NotNull
              Expression left,
              @NotNull
              Expression right)

Visits a 'greater than or equal' condition.

Parameters:

left - the left expression.

right - the right expression.

See Also:

ExpressionFactory#gte

visitLt

void visitLt(@NotNull
             Expression left,
             @NotNull
             Expression right)

Visits a 'less than' condition.

Parameters:

left - the left expression.

right - the right expression.

See Also:

ExpressionFactory#lt

visitLte

void visitLte(@NotNull
              Expression left,
              @NotNull
              Expression right)

Visits a 'less than or equal' condition.

Parameters:

left - the left expression.

right - the right expression.

See Also:

ExpressionFactory#lte

visitBBox

void visitBBox(@NotNull
               Expression left,
               @NotNull
               Expression right)

Visits a bbox expression.

Parameters:

left - the left expression.

right - the right expression.

See Also:

ExpressionFactory#bbox(Expression,Expression)

visitBBox

void visitBBox(@NotNull
               Expression expression)

Visits a bbox expression.

Parameters:

expression - expression that evaluates to a bounding box.

See Also:

ExpressionFactory#bbox(Expression)

visitLike

void visitLike(@NotNull
               String propertyPath,
               @NotNull
               String pattern,
               boolean matchCase,
               char wildCard,
               char singleChar,
               char escapeChar)

Visits a like expression.

Parameters:

propertyPath - Path for the property whose value needs to be retrieved.

pattern - The pattern to match.

matchCase - Whether to match case sensitive or case insensitive.

wildCard - The character used as wild card to match zero or more characters.

singleChar - The character used as single character to match exactly one character.

escapeChar - The character used to escape the meaning of the wildCard, singleChar and escapeChar itself.

Since:

2023.1

See Also:

ExpressionFactory#like