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78 changes: 78 additions & 0 deletions
78
sadu-mapper/src/main/java/de/chojo/sadu/mapper/reader/StandardReader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| /* | ||
| * SPDX-License-Identifier: LGPL-3.0-or-later | ||
| * | ||
| * Copyright (C) RainbowDashLabs and Contributor | ||
| */ | ||
|
|
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| package de.chojo.sadu.mapper.reader; | ||
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| import de.chojo.sadu.core.conversion.UUIDConverter; | ||
| import de.chojo.sadu.mapper.wrapper.Row; | ||
| import org.jetbrains.annotations.Contract; | ||
| import org.jetbrains.annotations.NotNull; | ||
|
|
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| import java.sql.Date; | ||
| import java.sql.Time; | ||
| import java.sql.Timestamp; | ||
| import java.time.Instant; | ||
| import java.time.LocalDate; | ||
| import java.time.LocalDateTime; | ||
| import java.time.LocalTime; | ||
| import java.time.OffsetDateTime; | ||
| import java.time.OffsetTime; | ||
| import java.time.ZoneId; | ||
| import java.time.ZonedDateTime; | ||
| import java.util.Calendar; | ||
| import java.util.UUID; | ||
|
|
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| /** | ||
| * Default implementations of {@link ValueReader}. | ||
| */ | ||
| public final class StandardReader { | ||
| public static final ValueReader<Instant, Long> INSTANT_FROM_MILLIS = ValueReader.create(Instant::ofEpochMilli, Row::getLong, Row::getLong); | ||
| public static final ValueReader<Instant, Long> INSTANT_FROM_SECONDS = ValueReader.create(Instant::ofEpochSecond, Row::getLong, Row::getLong); | ||
| public static final ValueReader<Instant, Timestamp> INSTANT_FROM_TIMESTAMP = ValueReader.create(Timestamp::toInstant, Row::getTimestamp, Row::getTimestamp); | ||
| public static final ValueReader<LocalDateTime, Timestamp> LOCAL_DATE_TIME = ValueReader.create(Timestamp::toLocalDateTime, Row::getTimestamp, Row::getTimestamp); | ||
| public static final ValueReader<OffsetDateTime, Timestamp> OFFSET_DATE_TIME = ValueReader.create(t -> OffsetDateTime.ofInstant(t.toInstant(), ZoneId.systemDefault()), Row::getTimestamp, Row::getTimestamp); | ||
| public static final ValueReader<ZonedDateTime, Timestamp> ZONED_DATE_TIME = ValueReader.create(t -> t.toInstant().atZone(ZoneId.systemDefault()), Row::getTimestamp, Row::getTimestamp); | ||
| public static final ValueReader<OffsetTime, Time> OFFSET_TIME = ValueReader.create(t -> t.toLocalTime().atOffset(OffsetTime.now().getOffset()), Row::getTime, Row::getTime); | ||
| public static final ValueReader<LocalDate, Date> LOCAL_DATE = ValueReader.create(Date::toLocalDate, Row::getDate, Row::getDate); | ||
| public static final ValueReader<LocalTime, Time> LOCAL_TIME = ValueReader.create(Time::toLocalTime, Row::getTime, Row::getTime); | ||
| public static final ValueReader<UUID, String> UUID_FROM_STRING = ValueReader.create(UUID::fromString, Row::getString, Row::getString); | ||
| public static final ValueReader<UUID, byte[]> UUID_FROM_BYTES = ValueReader.create(UUIDConverter::convert, Row::getBytes, Row::getBytes); | ||
|
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| @Contract(value = "_ -> new", pure = true) | ||
| public static @NotNull ValueReader<LocalDate, Date> localDate(Calendar calendar) { | ||
| return ValueReader.create(Date::toLocalDate, (row, name) -> row.getDate(name, calendar), (row, integer) -> row.getDate(integer, calendar)); | ||
| } | ||
|
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| @Contract(value = "_ -> new", pure = true) | ||
| public static @NotNull ValueReader<LocalTime, Time> localTime(Calendar calendar) { | ||
| return ValueReader.create(Time::toLocalTime, (row, name) -> row.getTime(name, calendar), (row, integer) -> row.getTime(integer, calendar)); | ||
| } | ||
|
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| @Contract(value = "_ -> new", pure = true) | ||
| public static @NotNull ValueReader<OffsetTime, Time> offsetTime(Calendar calendar) { | ||
| return ValueReader.create(t -> t.toLocalTime().atOffset(OffsetTime.now().getOffset()), (row, name) -> row.getTime(name, calendar), (row, integer) -> row.getTime(integer, calendar)); | ||
| } | ||
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| @Contract(value = "_ -> new", pure = true) | ||
| public static @NotNull ValueReader<LocalDateTime, Timestamp> localDateTime(Calendar calendar) { | ||
| return ValueReader.create(Timestamp::toLocalDateTime, (row, name) -> row.getTimestamp(name, calendar), (row, integer) -> row.getTimestamp(integer, calendar)); | ||
| } | ||
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| @Contract(value = "_ -> new", pure = true) | ||
| public static @NotNull ValueReader<OffsetDateTime, Timestamp> offsetDateTime(Calendar calendar) { | ||
| return ValueReader.create(t -> OffsetDateTime.ofInstant(t.toInstant(), ZoneId.systemDefault()), (row, name) -> row.getTimestamp(name, calendar), (row, integer) -> row.getTimestamp(integer, calendar)); | ||
| } | ||
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| @Contract(value = "_ -> new", pure = true) | ||
| public static @NotNull ValueReader<ZonedDateTime, Timestamp> zonedDateTime(Calendar calendar) { | ||
| return ValueReader.create(t -> t.toInstant().atZone(ZoneId.systemDefault()), (row, name) -> row.getTimestamp(name, calendar), (row, integer) -> row.getTimestamp(integer, calendar)); | ||
| } | ||
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| @Contract(value = "_ -> new", pure = true) | ||
| public static <T extends Enum<T>> @NotNull ValueReader<T, String> forEnum(Class<T> clazz) { | ||
| return ValueReader.create(v -> Enum.valueOf(clazz, v), Row::getString, Row::getString); | ||
| } | ||
| } |
103 changes: 103 additions & 0 deletions
103
sadu-mapper/src/main/java/de/chojo/sadu/mapper/reader/ValueReader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| /* | ||
| * SPDX-License-Identifier: LGPL-3.0-or-later | ||
| * | ||
| * Copyright (C) RainbowDashLabs and Contributor | ||
| */ | ||
|
|
||
| package de.chojo.sadu.mapper.reader; | ||
|
|
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| import de.chojo.sadu.core.exceptions.ThrowingBiFunction; | ||
| import de.chojo.sadu.mapper.wrapper.Row; | ||
| import org.jetbrains.annotations.NotNull; | ||
|
|
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| import java.sql.SQLException; | ||
| import java.util.function.Function; | ||
| import java.util.function.Supplier; | ||
|
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| /** | ||
| * Definition of a ValueReader to read columns from a {@link Row} and parse it to a java type. | ||
| * | ||
| * @param <T> The java type that is returned by the adapter | ||
| * @param <V> The intermediate SQL type that is retrieved from the row | ||
| * @see StandardReader | ||
| */ | ||
| public interface ValueReader<T, V> { | ||
| static <V, T> ValueReader<T, V> create(Function<V, T> parser, | ||
| ThrowingBiFunction<Row, String, V, SQLException> nameReader, | ||
| ThrowingBiFunction<Row, Integer, V, SQLException> indexReader) { | ||
| return new ValueReader<>() { | ||
| @Override | ||
| public Function<@NotNull V, T> reader() { | ||
| return parser; | ||
| } | ||
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| @Override | ||
| public ThrowingBiFunction<Row, String, V, SQLException> namedReader() { | ||
| return nameReader; | ||
| } | ||
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| @Override | ||
| public ThrowingBiFunction<Row, Integer, V, SQLException> indexedReader() { | ||
| return indexReader; | ||
| } | ||
| }; | ||
| } | ||
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| static <V, T> ValueReader<T, V> create(Function<V, T> parser, | ||
| ThrowingBiFunction<Row, String, V, SQLException> nameReader, | ||
| ThrowingBiFunction<Row, Integer, V, SQLException> indexReader, | ||
| Supplier<T> defaultValue) { | ||
| return new ValueReader<>() { | ||
| @Override | ||
| public Function<@NotNull V, T> reader() { | ||
| return parser; | ||
| } | ||
|
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| @Override | ||
| public ThrowingBiFunction<Row, String, V, SQLException> namedReader() { | ||
| return nameReader; | ||
| } | ||
|
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| @Override | ||
| public ThrowingBiFunction<Row, Integer, V, SQLException> indexedReader() { | ||
| return indexReader; | ||
| } | ||
|
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| @Override | ||
| public T defaultValue() { | ||
| return defaultValue.get(); | ||
| } | ||
| }; | ||
| } | ||
|
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| /** | ||
| * A reader that takes the sql type and converts it into a java type. | ||
| * The passed sql type instance is never null. | ||
| * | ||
| * @return a converted java instance of the sql object | ||
| */ | ||
| Function<@NotNull V, T> reader(); | ||
|
|
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| /** | ||
| * Function that provides access to a reader that returns the column value via column name | ||
| * | ||
| * @return function | ||
| */ | ||
| ThrowingBiFunction<Row, String, V, SQLException> namedReader(); | ||
|
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| /** | ||
| * Function that provides access to a reader that returns the column value via column index | ||
| * | ||
| * @return function | ||
| */ | ||
| ThrowingBiFunction<Row, Integer, V, SQLException> indexedReader(); | ||
|
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| /** | ||
| * A default value that should be returned when the SQL value is null | ||
| * | ||
| * @return a default value or null | ||
| */ | ||
| default T defaultValue() { | ||
| return null; | ||
| } | ||
| } |
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