io.r2dbc.postgresql.codec.AbstractJsonCodec Maven / Gradle / Ivy

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/*
 * Copyright 2019-2020 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.r2dbc.postgresql.client.Parameter;
import io.r2dbc.postgresql.message.Format;
import io.r2dbc.postgresql.type.PostgresqlObjectId;
import io.r2dbc.postgresql.util.Assert;

import static io.r2dbc.postgresql.message.Format.FORMAT_BINARY;
import static io.r2dbc.postgresql.type.PostgresqlObjectId.JSON;
import static io.r2dbc.postgresql.type.PostgresqlObjectId.JSONB;

abstract class AbstractJsonCodec extends AbstractCodec {

    AbstractJsonCodec(Class type) {
        super(type);
    }

    @Override
    public Parameter encodeNull() {
        return createNull(JSONB, FORMAT_BINARY);
    }

    @Override
    boolean doCanDecode(PostgresqlObjectId type, Format format) {
        Assert.requireNonNull(format, "format must not be null");
        Assert.requireNonNull(type, "type must not be null");

        return JSONB == type || JSON == type;
    }

}