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/*
 * 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
 *
 * http://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 com.github.pgasync.impl.conversion;

import com.github.pgasync.SqlException;
import com.github.pgasync.impl.Oid;

import static java.nio.charset.StandardCharsets.UTF_8;
import static javax.xml.bind.DatatypeConverter.parseHexBinary;
import static javax.xml.bind.DatatypeConverter.printHexBinary;

/**
 * @author Antti Laisi
 */
enum BlobConversions {
    ;

    static byte[] toBytes(Oid oid, byte[] value) {
        switch (oid) {
            case UNSPECIFIED: // fallthrough
            case BYTEA:
                return parseHexBinary(new String(value, 2, value.length - 2, UTF_8));
            default:
                throw new SqlException("Unsupported conversion " + oid.name() + " -> byte[]");
        }
    }

    static byte[] fromBytes(byte[] bytes) {
        return ("\\x" + printHexBinary(bytes)).getBytes(UTF_8);
    }
}