/*
 * Copyright (c) 2015, 2026, Oracle and/or its affiliates.
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License, version 2.0, as published by
 * the Free Software Foundation.
 *
 * This program is designed to work with certain software that is licensed under separate terms, as designated in a particular file or component or in
 * included license documentation. The authors of MySQL hereby grant you an additional permission to link the program and your derivative works with the
 * separately licensed software that they have either included with the program or referenced in the documentation.
 *
 * Without limiting anything contained in the foregoing, this file, which is part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
 * version 1.0, a copy of which can be found at http://oss.oracle.com/licenses/universal-foss-exception.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0, for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

package com.mysql.cj.result;

import java.math.BigDecimal;
import java.math.BigInteger;

import com.mysql.cj.Messages;
import com.mysql.cj.conf.PropertyKey;
import com.mysql.cj.conf.PropertySet;
import com.mysql.cj.exceptions.DataConversionException;
import com.mysql.cj.protocol.InternalDate;
import com.mysql.cj.protocol.InternalTime;
import com.mysql.cj.protocol.InternalTimestamp;

/**
 * The {@link DefaultValueFactory} provides a base class that can be used for {@link ValueFactory} implementations that do not support creating from every type.
 * The default implementation throws an {@link UnsupportedOperationException} for every type and individual methods must be overridden by subclasses.
 *
 * @param <T>
 *            value type
 */
public abstract class DefaultValueFactory<T> implements ValueFactory<T> {

    protected PropertySet pset = null;

    protected boolean jdbcCompliantTruncationForReads = true;

    public DefaultValueFactory(PropertySet pset) {
        this.pset = pset;

        // TODO we always check initial value here, whatever the setupServerForTruncationChecks() does for writes.
        // It also means that runtime changes of this variable have no effect on reads.
        this.jdbcCompliantTruncationForReads = this.pset.getBooleanProperty(PropertyKey.jdbcCompliantTruncation).getInitialValue();
    }

    @Override
    public void setPropertySet(PropertySet pset) {
        this.pset = pset;
    }

    T unsupported(String sourceType) {
        throw new DataConversionException(Messages.getString("ResultSet.UnsupportedConversion", new Object[] { sourceType, getTargetTypeName() }));
    }

    @Override
    public T createFromTime(InternalTime it) {
        return unsupported("TIME");
    }

    @Override
    public T createFromTimestamp(InternalTimestamp its) {
        return unsupported("TIMESTAMP");
    }

    @Override
    public T createFromDate(InternalDate idate) {
        return unsupported("DATE");
    }

    @Override
    public T createFromDatetime(InternalTimestamp its) {
        return unsupported("DATETIME");
    }

    @Override
    public T createFromYear(long l) {
        return unsupported("YEAR");
    }

    @Override
    public T createFromLong(long l) {
        return unsupported("LONG");
    }

    @Override
    public T createFromBigInteger(BigInteger i) {
        return unsupported("BIGINT");
    }

    @Override
    public T createFromDouble(double d) {
        return unsupported("DOUBLE");
    }

    @Override
    public T createFromBigDecimal(BigDecimal d) {
        return unsupported("DECIMAL");
    }

    @Override
    public T createFromBit(byte[] bytes, int offset, int length) {
        return unsupported("BIT");
    }

    @Override
    public T createFromNull() {
        return null;
    }

}
