Package org.dalesbred.query

Interface VariableResolver

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface VariableResolver

Resolves values for variables appearing in SQL queries with named parameters.

Method Summary

Modifier and Type	Method	Description
static @NotNull VariableResolver	forBean(@NotNull Object object)	Returns a VariableResolver that is backed by given bean.
static @NotNull VariableResolver	forMap(@NotNull Map<String,?> variables)	Returns a VariableResolver that is backed by given map.
@Nullable Object	getValue(@NotNull String variable)	Returns the value of given variable, which could be null.

Method Details

getValue

@Nullable
@Nullable Object getValue(@NotNull
 @NotNull String variable)

Returns the value of given variable, which could be null.

Throws:

VariableResolutionException - if resolution fails

forMap

@NotNull
static @NotNull VariableResolver forMap(@NotNull
 @NotNull Map<String,?> variables)

Returns a VariableResolver that is backed by given map.

forBean

@NotNull
static @NotNull VariableResolver forBean(@NotNull
 @NotNull Object object)

Returns a VariableResolver that is backed by given bean. When variables are looked up, tries to find a matching getter or accessible field for the variable and returns its value.