Package tech.ydb.yoj.databind.converter

Class StringValueConverter<J>

java.lang.Object

tech.ydb.yoj.databind.converter.StringValueConverter<J>

Type Parameters:

J - Java type

All Implemented Interfaces:

ValueConverter<J,String>

public final class StringValueConverter<J>
extends Object
implements ValueConverter<J,String>

Generic YDB text column ↔ Java value converter. Uses Object.toString() to convert Java values to YDB column values, and one of (static fromString(String), static valueOf(String) or the 1-arg String constructor) to convert YDB column values back to Java.

• Apply it locally to your entity's field, by using the @StringColumn annotation. Explicitly specify @Column(customValueType=@CustomValueType(columnClass=String.class, converter=StringValueConverter.class), ...) if you need to add more column customizations.
• Apply it globally to a user-defined field type, by using the @StringValueType annotation. Explicitly specify @CustomValueType(columnClass=String.class, converter=StringValueConverter.class), ...) if you prefer not to use meta-annotations.

Nested Class Summary

Nested classes/interfaces inherited from interface tech.ydb.yoj.databind.converter.ValueConverter

ValueConverter.NoConverter

Constructor Summary

Constructors

Constructor	Description
StringValueConverter()

Method Summary

Modifier and Type	Method	Description
@NonNull String	toColumn(@NonNull Schema.JavaField field, J value)	Converts a field value to a database column value supported by YOJ.
J	toJava(@NonNull Schema.JavaField field, @NonNull String column)	Converts a database column value to a Java field value.

Methods inherited from class java.lang.Object

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

Constructor Details

StringValueConverter

public StringValueConverter()

Method Details

toColumn

@NonNull
public @NonNull String toColumn(@NonNull
 @NonNull Schema.JavaField field,
 @NonNull
 J value)

Description copied from interface: ValueConverter

Converts a field value to a database column value supported by YOJ.

Specified by:

toColumn in interface ValueConverter<J,String>

Parameters:

field - schema field

value - field value, guaranteed to not be null

Returns:

database column value corresponding to the Java field value, must not be null

See Also:

• ValueConverter.toJava(JavaField, Comparable)

toJava

@NonNull
public J toJava(@NonNull
 @NonNull Schema.JavaField field,
 @NonNull
 @NonNull String column)

Description copied from interface: ValueConverter

Converts a database column value to a Java field value.

Specified by:

toJava in interface ValueConverter<J,String>

Parameters:

field - schema field

column - database column value, guaranteed to not be null

Returns:

Java field value corresponding to the database column value, must not be null

See Also:

• ValueConverter.toColumn(JavaField, Object)