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问如何使用jOOQ gradle插件将postgres中的bigint[]字段转换为类字段
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Stack Overflow用户

提问于 2020-06-18 15:53:05

回答 3查看 321关注 0票数 0

大家好，感兴趣的人:)我对jOOQ有一些问题。我需要从PostgreSQL表生成jOOQ实体。它有一个bigint[]类型的字段。jOOQ Gradle插件(我正在使用这个https://github.com/etiennestuder/gradle-jooq-plugin)不支持数组DateType，所以唯一的方法是使用带有强制类型的自定义类型

// jooq config in build.gradle
customTypes {
    customType {
        name = "BigintArrayBinder"
        type = "Long[]"
        converter = "ru.stdev.tskad.yandexnavigator.binder.BigintArrayBinder"
    }
}
forcedTypes {
    forcedType {
        name = "BigintArrayBinder"
        includeExpression = '.*'
        includeTypes = 'ARRAY'
    }
}

这是这个绑定器及其转换器的实现

public class BigintArrayConverter implements Converter<Object[], Long[]> {

    @Override
    public Long[] from(Object[] t) {
        return t == null ? new Long[]{} : (Long[]) t;
    }

    @Override
    public Object[] to(Long[] u) {
        return u == null || u.length == 0 ? new Object[]{} : u;
    }

    @Override
    public Class<Object[]> fromType() {
        return Object[].class;
    }

    @Override
    public Class<Long[]> toType() {
        return Long[].class;
    }

}

import org.jooq.*;
import org.jooq.conf.ParamType;
import org.jooq.impl.DSL;
import org.postgresql.core.BaseConnection;
import org.postgresql.jdbc.PgArray;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.sql.Types;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class BigintArrayBinder implements Binding<Object[], Long[]> {

    // The converter does all the work
    @Override
    public Converter<Object[], Long[]> converter() {
        return new BigintArrayConverter();
    }

    // Rending a bind variable for the binding context's value and casting it to the json type
    @Override
    public void sql(BindingSQLContext<Long[]> ctx) throws SQLException {
        // Depending on how you generate your SQL, you may need to explicitly distinguish
        // between jOOQ generating bind variables or inlined literals.
        if (ctx.render().paramType() == ParamType.INLINED)
            ctx.render().visit(DSL.inline(ctx.convert(converter()).value())).sql("::bigint[]");
        else
            ctx.render().sql("::bigint[]");
    }

    // Registering ARRAY types for JDBC CallableStatement OUT parameters
    @Override
    public void register(BindingRegisterContext<Long[]> ctx) throws SQLException {
        ctx.statement().registerOutParameter(ctx.index(), Types.ARRAY);
    }

    // Converting the Long[] to a bigint[] value and setting that on a JDBC PreparedStatement
    @Override
    public void set(BindingSetStatementContext<Long[]> ctx) throws SQLException {
        Object[] value = ctx.convert(converter()).value();

        BaseConnection connection = (BaseConnection) DriverManager.getConnection(
                "jdbc:postgresql://localhost:5432/m4",
                "postgres",
                "postgres"
        );

        int longOid = 20;

        System.out.print("value -> ");
        System.out.println(Arrays.toString(value));

        PgArray pgArray = new PgArray(connection, longOid, Arrays.toString(value));

        ctx.statement().setArray(ctx.index(), pgArray);
    }

    // Getting a bigint[] value from a JDBC ResultSet and converting that to a Long[]
    @Override
    public void get(BindingGetResultSetContext<Long[]> ctx) throws SQLException {
        Object[] array = (Object[]) ctx.resultSet().getArray(ctx.index()).getArray();

        ctx.convert(converter()).value(array);
    }

    // Getting a bigint[] value from a JDBC CallableStatement and converting that to a Long[]
    @Override
    public void get(BindingGetStatementContext<Long[]> ctx) throws SQLException {
        Object[] array = (Object[]) ctx.statement().getArray(ctx.index()).getArray();
        ctx.convert(converter()).value(array);
    }

    // Setting a value on a JDBC SQLOutput (useful for Oracle OBJECT types)
    @Override
    public void set(BindingSetSQLOutputContext<Long[]> ctx) throws SQLException {
        throw new SQLFeatureNotSupportedException();
    }

    // Getting a value from a JDBC SQLInput (useful for Oracle OBJECT types)
    @Override
    public void get(BindingGetSQLInputContext<Long[]> ctx) throws SQLException {
        throw new SQLFeatureNotSupportedException();
    }

}

因此，它可以编译并很好地处理selects查询。但是如果我尝试做插入操作，我会有这样的异常

org.jooq.exception.DataAccessException: SQL [null]; Error while writing value at JDBC bind index: 7
    at org.jooq_3.13.1.POSTGRES.debug(Unknown Source)
    at org.jooq.impl.Tools.translate(Tools.java:2751)
    at org.jooq.impl.AbstractBindContext.bindValue(AbstractBindContext.java:127)
    at org.jooq.impl.Val.accept(Val.java:103)
    at org.jooq.impl.AbstractBindContext.bindInternal(AbstractBindContext.java:269)
    at org.jooq.impl.AbstractBindContext.visit0(AbstractBindContext.java:88)
    at org.jooq.impl.AbstractContext.visit0(AbstractContext.java:457)
    at org.jooq.impl.AbstractContext.visit(AbstractContext.java:218)
    at org.jooq.impl.QueryPartList.accept(QueryPartList.java:121)
    at org.jooq.impl.AbstractBindContext.bindInternal(AbstractBindContext.java:269)
    at org.jooq.impl.AbstractBindContext.visit0(AbstractBindContext.java:88)
    at org.jooq.impl.AbstractContext.visit0(AbstractContext.java:457)
    at org.jooq.impl.AbstractContext.visit(AbstractContext.java:218)
    at org.jooq.impl.AbstractQuery.execute(AbstractQuery.java:367)
    at org.jooq.impl.AbstractDelegatingQuery.execute(AbstractDelegatingQuery.java:119)
    at ru.stdev.tskad.yandexnavigator.repository.NavigatorRepository$testInsert$2.invokeSuspend(NavigatorRepository.kt:37)
    at ru.stdev.tskad.yandexnavigator.repository.NavigatorRepository$testInsert$2.invoke(NavigatorRepository.kt)
    at ru.stdev.utp.common.jooq.DefaultJooqWrapper$launchOperation$1.invokeSuspend(DefaultJooqWrapper.kt:17)
    at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
    at kotlinx.coroutines.DispatchedContinuationKt.resumeCancellableWith(DispatchedContinuation.kt:330)
    at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable(Cancellable.kt:26)
    at kotlinx.coroutines.CoroutineStart.invoke(CoroutineStart.kt:109)
    at kotlinx.coroutines.AbstractCoroutine.start(AbstractCoroutine.kt:158)
    at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:58)
    at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
    at ru.stdev.utp.common.jooq.DefaultJooqWrapper.launchOperation(DefaultJooqWrapper.kt:16)
    at ru.stdev.utp.common.jooq.DefaultJooqWrapper.request(DefaultJooqWrapper.kt:27)
    at ru.stdev.tskad.yandexnavigator.repository.NavigatorRepository.testInsert(NavigatorRepository.kt:25)
    at ru.stdev.tskad.yandexnavigator.routes.NavigatorRouteKt$navigator$1.invokeSuspend(NavigatorRoute.kt:23)
    at ru.stdev.tskad.yandexnavigator.routes.NavigatorRouteKt$navigator$1.invoke(NavigatorRoute.kt)
    at io.ktor.util.pipeline.SuspendFunctionGun.loop(PipelineContext.kt:318)
    at io.ktor.util.pipeline.SuspendFunctionGun.proceed(PipelineContext.kt:163)
    at io.ktor.util.pipeline.SuspendFunctionGun.execute(PipelineContext.kt:183)
    at io.ktor.util.pipeline.Pipeline.execute(Pipeline.kt:27)
    at io.ktor.routing.Routing.executeResult(Routing.kt:147)
    at io.ktor.routing.Routing.interceptor(Routing.kt:34)
    at io.ktor.routing.Routing$Feature$install$1.invokeSuspend(Routing.kt:99)
    at io.ktor.routing.Routing$Feature$install$1.invoke(Routing.kt)
    at io.ktor.util.pipeline.SuspendFunctionGun.loop(PipelineContext.kt:318)
    at io.ktor.util.pipeline.SuspendFunctionGun.proceed(PipelineContext.kt:163)
    at io.ktor.features.ContentNegotiation$Feature$install$1.invokeSuspend(ContentNegotiation.kt:107)
    at io.ktor.features.ContentNegotiation$Feature$install$1.invoke(ContentNegotiation.kt)
    at io.ktor.util.pipeline.SuspendFunctionGun.loop(PipelineContext.kt:318)
    at io.ktor.util.pipeline.SuspendFunctionGun.proceed(PipelineContext.kt:163)
    at io.ktor.features.StatusPages$interceptCall$2.invokeSuspend(StatusPages.kt:101)
    at io.ktor.features.StatusPages$interceptCall$2.invoke(StatusPages.kt)
    at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn(Undispatched.kt:91)
    at kotlinx.coroutines.CoroutineScopeKt.coroutineScope(CoroutineScope.kt:194)
    at io.ktor.features.StatusPages.interceptCall(StatusPages.kt:100)
    at io.ktor.features.StatusPages$Feature$install$2.invokeSuspend(StatusPages.kt:140)
    at io.ktor.features.StatusPages$Feature$install$2.invoke(StatusPages.kt)
    at io.ktor.util.pipeline.SuspendFunctionGun.loop(PipelineContext.kt:318)
    at io.ktor.util.pipeline.SuspendFunctionGun.proceed(PipelineContext.kt:163)
    at io.ktor.features.CallLogging$Feature$install$2.invokeSuspend(CallLogging.kt:139)
    at io.ktor.features.CallLogging$Feature$install$2.invoke(CallLogging.kt)
    at io.ktor.util.pipeline.SuspendFunctionGun.loop(PipelineContext.kt:318)
    at io.ktor.util.pipeline.SuspendFunctionGun.proceed(PipelineContext.kt:163)
    at io.ktor.util.pipeline.SuspendFunctionGun.execute(PipelineContext.kt:183)
    at io.ktor.util.pipeline.Pipeline.execute(Pipeline.kt:27)
    at io.ktor.server.engine.DefaultEnginePipelineKt$defaultEnginePipeline$2.invokeSuspend(DefaultEnginePipeline.kt:120)
    at io.ktor.server.engine.DefaultEnginePipelineKt$defaultEnginePipeline$2.invoke(DefaultEnginePipeline.kt)
    at io.ktor.util.pipeline.SuspendFunctionGun.loop(PipelineContext.kt:318)
    at io.ktor.util.pipeline.SuspendFunctionGun.proceed(PipelineContext.kt:163)
    at io.ktor.util.pipeline.SuspendFunctionGun.execute(PipelineContext.kt:183)
    at io.ktor.util.pipeline.Pipeline.execute(Pipeline.kt:27)
    at io.ktor.server.netty.NettyApplicationCallHandler$handleRequest$1.invokeSuspend(NettyApplicationCallHandler.kt:40)
    at io.ktor.server.netty.NettyApplicationCallHandler$handleRequest$1.invoke(NettyApplicationCallHandler.kt)
    at kotlinx.coroutines.intrinsics.UndispatchedKt.startCoroutineUndispatched(Undispatched.kt:55)
    at kotlinx.coroutines.CoroutineStart.invoke(CoroutineStart.kt:111)
    at kotlinx.coroutines.AbstractCoroutine.start(AbstractCoroutine.kt:158)
    at kotlinx.coroutines.BuildersKt__Builders_commonKt.launch(Builders.common.kt:56)
    at kotlinx.coroutines.BuildersKt.launch(Unknown Source)
    at io.ktor.server.netty.NettyApplicationCallHandler.handleRequest(NettyApplicationCallHandler.kt:30)
    at io.ktor.server.netty.NettyApplicationCallHandler.channelRead(NettyApplicationCallHandler.kt:24)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
    at io.netty.channel.AbstractChannelHandlerContext.access$600(AbstractChannelHandlerContext.java:59)
    at io.netty.channel.AbstractChannelHandlerContext$7.run(AbstractChannelHandlerContext.java:368)
    at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500)
    at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.sql.SQLException: Error while writing value at JDBC bind index: 7
    at org.jooq.impl.DefaultBindContext.bindValue0(DefaultBindContext.java:67)
    at org.jooq.impl.AbstractBindContext.bindValue(AbstractBindContext.java:124)
    ... 81 common frames omitted
Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 63 out of bounds for length 63
    at org.postgresql.jdbc.PgArray.buildArrayList(PgArray.java:450)
    at org.postgresql.jdbc.PgArray.getBaseTypeName(PgArray.java:811)
    at org.postgresql.jdbc.PgPreparedStatement.setArray(PgPreparedStatement.java:1098)
    at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.setArray(HikariProxyPreparedStatement.java)
    at org.jooq.tools.jdbc.DefaultPreparedStatement.setArray(DefaultPreparedStatement.java:239)
    at ru.stdev.tskad.yandexnavigator.binder.BigintArrayBinder.set(BigintArrayBinder.java:63)
    at org.jooq.impl.DefaultBindContext.bindValue0(DefaultBindContext.java:62)
    ... 82 common frames omitted

让我困惑的第一件事是创建BaseConnection。我可以从DslContext获取连接，但它返回一个HikariProxyConnection。所以，它不适用于PgArray，它需要BaseConnection。然后，我需要给它一个oid，它等于20 to Long类型。然后我必须以字符串或字节数组的形式给出一个数组。结果是我有了ArrayIndexOutOfBoundsException。我做了很多次尝试来寻找这个问题的答案，但是我失败了。我做错了什么？我觉得我做错了什么，但我不明白到底是什么。

postgresql

gradle

jdbc

jooq

java

回答 3

Stack Overflow用户

回答已采纳

发布于 2020-06-19 21:44:21

你应该试试Connection.createArrayOf()

例如ctx.statement().getConnection().createArrayOf(...)

票数 1

Stack Overflow用户

发布于 2020-06-18 17:30:38

你为什么要这么做？

BaseConnection connection = (BaseConnection) DriverManager.getConnection(
                "jdbc:postgresql://localhost:5432/m4",
                "postgres",
                "postgres"
        );

此时，您应该已经有了一个连接。由于您从未关闭此连接，因此这里可能存在资源泄漏。

你也许可以做到

BaseConnection connection = (BaseConnection)  ctx.statement().getConnection()

票数 0

Stack Overflow用户

发布于 2020-06-22 03:41:06

代码解决方案：

public class BigintArrayBinder implements Binding<Object[], Long[]> {

    // The converter does all the work
    @Override
    public Converter<Object[], Long[]> converter() {
        return new BigintArrayConverter();
    }

    // Rending a bind variable for the binding context's value and casting it to the bigint array type
    @Override
    public void sql(BindingSQLContext<Long[]> ctx) throws SQLException {
        ctx.render().visit(DSL.inline(ctx.convert(converter()).value()));
    }

    // Registering ARRAY types for JDBC CallableStatement OUT parameters
    @Override
    public void register(BindingRegisterContext<Long[]> ctx) throws SQLException {
        ctx.statement().registerOutParameter(ctx.index(), Types.ARRAY);
    }

    // Converting the Long[] to a bigint[] value and setting that on a JDBC PreparedStatement
    @Override
    public void set(BindingSetStatementContext<Long[]> ctx) {
        Object[] value = ctx.convert(converter()).value();

        ctx.dsl().connection(connection -> connection.createArrayOf("bigint", value));
    }

    // Getting a bigint[] value from a JDBC ResultSet and converting that to a Long[]
    @Override
    public void get(BindingGetResultSetContext<Long[]> ctx) throws SQLException {
        Object[] array = (Object[]) ctx.resultSet().getArray(ctx.index()).getArray();

        ctx.convert(converter()).value(array);
    }

    // Getting a bigint[] value from a JDBC CallableStatement and converting that to a Long[]
    @Override
    public void get(BindingGetStatementContext<Long[]> ctx) throws SQLException {
        Object[] array = (Object[]) ctx.statement().getArray(ctx.index()).getArray();
        ctx.convert(converter()).value(array);
    }

    // Setting a value on a JDBC SQLOutput (useful for Oracle OBJECT types)
    @Override
    public void set(BindingSetSQLOutputContext<Long[]> ctx) throws SQLException {
        throw new SQLFeatureNotSupportedException();
    }

    // Getting a value from a JDBC SQLInput (useful for Oracle OBJECT types)
    @Override
    public void get(BindingGetSQLInputContext<Long[]> ctx) throws SQLException {
        throw new SQLFeatureNotSupportedException();
    }

}