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Reactive Relational Database Connectivity Driver Implementation for Postgresql

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/*
 * Copyright 2019 the original author or 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.r2dbc.postgresql.codec;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.r2dbc.postgresql.client.EncodedParameter;
import io.r2dbc.postgresql.message.Format;
import io.r2dbc.postgresql.util.Assert;
import io.r2dbc.postgresql.util.ByteBufUtils;

import static io.r2dbc.postgresql.codec.PostgresqlObjectId.JSON;
import static io.r2dbc.postgresql.message.Format.FORMAT_TEXT;

final class JsonStringCodec extends AbstractJsonCodec {

    private final ByteBufAllocator byteBufAllocator;

    JsonStringCodec(ByteBufAllocator byteBufAllocator) {
        super(String.class);
        this.byteBufAllocator = Assert.requireNonNull(byteBufAllocator, "byteBufAllocator must not be null");
    }

    @Override
    String doDecode(ByteBuf buffer, PostgresTypeIdentifier dataType, Format format, Class type) {
        return ByteBufUtils.decode(buffer);
    }

    @Override
    EncodedParameter doEncode(String value) {
        return doEncode(value, JSON);
    }

    @Override
    EncodedParameter doEncode(String value, PostgresTypeIdentifier dataType) {
        Assert.requireNonNull(value, "value must not be null");

        return create(FORMAT_TEXT, dataType, () -> ByteBufUtils.encode(this.byteBufAllocator, value));
    }

}