com.liferay.portal.odata.filter.expression

Interface ExpressionVisitor<T>

@ProviderType
public interface ExpressionVisitor<T>

Defines expression visitors with arbitrary return types. This interface's methods are called when an expression node of the expression tree is traversed.

Method Summary

Modifier and Type	Method and Description
T	visitBinaryExpressionOperation(BinaryExpression.Operation operation, T left, T right) Called for each BinaryExpression.
default T	visitCollectionPropertyExpression(CollectionPropertyExpression collectionPropertyExpression) Called for each traversed ComplexPropertyExpression expression
default T	visitComplexPropertyExpression(ComplexPropertyExpression complexPropertyExpression) Called for each traversed ComplexPropertyExpression expression
default T	visitLambdaFunctionExpression(LambdaFunctionExpression.Type type, java.lang.String variableName, Expression expression) Called for each traversed LambdaFunctionExpression expression
default T	visitLambdaVariableExpression(LambdaVariableExpression lambdaVariableExpression) Called for each traversed LambdaVariableExpression expression
T	visitListExpressionOperation(ListExpression.Operation operation, T left, java.util.List<T> right) Called for each ListExpression.
T	visitLiteralExpression(LiteralExpression literalExpression) Called for each LiteralExpression.
T	visitMemberExpression(MemberExpression memberExpression) Called for each MemberExpression.
T	visitMethodExpression(java.util.List<T> expressions, MethodExpression.Type type) Called for each traversed MethodExpression expression
default T	visitPrimitivePropertyExpression(PrimitivePropertyExpression primitivePropertyExpression) Called for each traversed PrimitivePropertyExpression expression.
default T	visitUnaryExpressionOperation(UnaryExpression.Operation operation, T operand) Called for each traversed UnaryExpression expression

Method Detail

visitBinaryExpressionOperation

T visitBinaryExpressionOperation(BinaryExpression.Operation operation,
                                 T left,
                                 T right)
                          throws ExpressionVisitException

Called for each BinaryExpression.

Parameters:

operation - the binary expression's operation

left - the return value of the left subtree

right - the return value of the right subtree

Returns:

T the object of type T

Throws:

ExpressionVisitException - if an expression visit exception occurred

visitCollectionPropertyExpression

default T visitCollectionPropertyExpression(CollectionPropertyExpression collectionPropertyExpression)
                                     throws ExpressionVisitException

Called for each traversed ComplexPropertyExpression expression

Parameters:

collectionPropertyExpression - the complex property expression

Returns:

T the object of type T

Throws:

ExpressionVisitException - the expression visit exception

visitComplexPropertyExpression

default T visitComplexPropertyExpression(ComplexPropertyExpression complexPropertyExpression)
                                  throws ExpressionVisitException

Called for each traversed ComplexPropertyExpression expression

Parameters:

complexPropertyExpression - the complex property expression

Returns:

T the object of type T

Throws:

ExpressionVisitException - the expression visit exception

visitLambdaFunctionExpression

default T visitLambdaFunctionExpression(LambdaFunctionExpression.Type type,
                                        java.lang.String variableName,
                                        Expression expression)
                                 throws ExpressionVisitException

Called for each traversed LambdaFunctionExpression expression

Parameters:

variableName - the name of the lambda variable

expression - the expression

Returns:

T the object of type T

Throws:

ExpressionVisitException - the expression visit exception

visitLambdaVariableExpression

default T visitLambdaVariableExpression(LambdaVariableExpression lambdaVariableExpression)
                                 throws ExpressionVisitException

Called for each traversed LambdaVariableExpression expression

Parameters:

lambdaVariableExpression - the lambda variable expression

Returns:

the t

Throws:

ExpressionVisitException - if an expression visit exception occurred

visitListExpressionOperation

T visitListExpressionOperation(ListExpression.Operation operation,
                               T left,
                               java.util.List<T> right)
                        throws ExpressionVisitException

Called for each ListExpression.

Parameters:

operation - the list expression's operation

left - the return value of the left subtree

right - the return value of the lists of right subtrees

Returns:

T the object of type T

Throws:

ExpressionVisitException - if an expression visit exception occurred

visitLiteralExpression

T visitLiteralExpression(LiteralExpression literalExpression)
                  throws ExpressionVisitException

Called for each LiteralExpression.

Parameters:

literalExpression - the literal expression

Returns:

T the object of type T

Throws:

ExpressionVisitException - if an expression visit exception occurred

visitMemberExpression

T visitMemberExpression(MemberExpression memberExpression)
                 throws ExpressionVisitException

Called for each MemberExpression.

Parameters:

memberExpression - the member expression

Returns:

T the object of type T

Throws:

ExpressionVisitException - if an expression visit exception occurred

visitMethodExpression

T visitMethodExpression(java.util.List<T> expressions,
                        MethodExpression.Type type)
                 throws ExpressionVisitException

Called for each traversed MethodExpression expression

Parameters:

expressions - List of return values created by visiting each method expression

type - Method.Type

Returns:

T the object of type T

Throws:

ExpressionVisitException - if an expression visit exception occurred

visitPrimitivePropertyExpression

default T visitPrimitivePropertyExpression(PrimitivePropertyExpression primitivePropertyExpression)
                                    throws ExpressionVisitException

Called for each traversed PrimitivePropertyExpression expression.

Parameters:

primitivePropertyExpression - the primitive property expression

Returns:

T the object of type T

Throws:

ExpressionVisitException - if an expression visit exception occurred

visitUnaryExpressionOperation

default T visitUnaryExpressionOperation(UnaryExpression.Operation operation,
                                        T operand)
                                 throws ExpressionVisitException

Called for each traversed UnaryExpression expression

Parameters:

operation - the unary expression's operation

operand - the return value of the subtree

Returns:

T the object of type T

Throws:

ExpressionVisitException - if an expression visit exception occurred