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Reactive Relational Database Connectivity Driver Implementation for Postgresql

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/*
 * Copyright 2017 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.ByteBufAllocator;
import io.r2dbc.postgresql.message.Format;
import io.r2dbc.postgresql.util.Assert;

import static io.r2dbc.postgresql.codec.PostgresqlObjectId.BPCHAR_ARRAY;
import static io.r2dbc.postgresql.codec.PostgresqlObjectId.CHAR_ARRAY;
import static io.r2dbc.postgresql.codec.PostgresqlObjectId.NAME_ARRAY;
import static io.r2dbc.postgresql.codec.PostgresqlObjectId.TEXT_ARRAY;
import static io.r2dbc.postgresql.codec.PostgresqlObjectId.VARCHAR_ARRAY;

final class StringArrayCodec extends ArrayCodec {

    StringArrayCodec(ByteBufAllocator byteBufAllocator) {
        super(byteBufAllocator, TEXT_ARRAY, new StringCodec(byteBufAllocator), String.class);
    }

    @Override
    public boolean canDecode(int dataType, Format format, Class type) {
        return PostgresqlObjectId.isValid(dataType) && doCanDecode(PostgresqlObjectId.valueOf(dataType), format);
    }

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

        return (BPCHAR_ARRAY == type || CHAR_ARRAY == type || TEXT_ARRAY == type || VARCHAR_ARRAY == type | NAME_ARRAY == type);
    }

}