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Data Repository Support for Micronaut

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/*
 * Copyright 2017-2024 original authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.micronaut.data.r2dbc.operations;

import io.micronaut.core.annotation.Internal;
import io.micronaut.core.annotation.NonNull;
import io.micronaut.core.annotation.Nullable;
import io.micronaut.data.exceptions.DataAccessException;
import io.micronaut.data.exceptions.OptimisticLockException;
import io.micronaut.data.model.query.builder.sql.Dialect;
import io.r2dbc.spi.R2dbcException;
import jakarta.inject.Singleton;

/**
 * The {@link R2dbcExceptionMapper} for {@link Dialect#ORACLE}.
 * Handles {@link io.r2dbc.spi.R2dbcException} for Oracle update commands. Can add more logic if needed, but this
 * now handles only optimistic locking exception for given error code.
 */
@Singleton
@Internal
final class OracleR2dbcExceptionMapper implements R2dbcExceptionMapper {

    private static final int JSON_VIEW_ETAG_NOT_MATCHING_ERROR = 42699;

    @Override
    public Dialect getDialect() {
        return Dialect.ORACLE;
    }

    @Override
    @Nullable
    public DataAccessException mapR2dbcException(@NonNull R2dbcException r2dbcException) {
        if (r2dbcException.getErrorCode() == JSON_VIEW_ETAG_NOT_MATCHING_ERROR) {
            return new OptimisticLockException("ETAG did not match when updating record: " + r2dbcException.getMessage(), r2dbcException);
        }
        return null;
    }
}