com.liferay.portal.dao.orm.common.SQLTransformer.java Source code

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Here is the source code for com.liferay.portal.dao.orm.common.SQLTransformer.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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 Lesser General Public License for more
 * details.
 */

package com.liferay.portal.dao.orm.common;

import com.liferay.portal.dao.sql.transformer.HQLToJPQLTransformerLogic;
import com.liferay.portal.dao.sql.transformer.JPQLToHQLTransformerLogic;
import com.liferay.portal.dao.sql.transformer.SQLTransformerFactory;
import com.liferay.portal.kernel.dao.db.DBManagerUtil;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Function;

/**
 * @author Brian Wing Shun Chan
 * @author Shuyang Zhou
 * @author Manuel de la Pea
 */
public class SQLTransformer {

    public static void reloadSQLTransformer() {
        _instance._reloadSQLTransformer();
    }

    public static String transform(String sql) {
        com.liferay.portal.dao.sql.transformer.SQLTransformer sqlTransformer = _instance._getSQLTransformer();

        return sqlTransformer.transform(sql);
    }

    /**
     * @deprecated As of Judson (7.1.x), replaced by {@link
     *             #transformFromHQLToJQPL(String)}
     */
    @Deprecated
    public static String transformFromHqlToJpql(String sql) {
        return transformFromHQLToJQPL(sql);
    }

    public static String transformFromHQLToJQPL(String sql) {
        return _instance._transformFromHQLToJPQL(sql);
    }

    /**
     * @deprecated As of Judson (7.1.x), replaced by {@link
     *             #transformFromJPQLToHQL(String)}
     */
    @Deprecated
    public static String transformFromJpqlToHql(String sql) {
        return transformFromJPQLToHQL(sql);
    }

    public static String transformFromJPQLToHQL(String sql) {
        return _instance._transformFromJPQLToHQL(sql);
    }

    private SQLTransformer() {
        _reloadSQLTransformer();
    }

    private com.liferay.portal.dao.sql.transformer.SQLTransformer _getSQLTransformer() {

        return _sqlTransformer;
    }

    private void _reloadSQLTransformer() {
        if (_transformedSqls == null) {
            _transformedSqls = new ConcurrentHashMap<>();
        } else {
            _transformedSqls.clear();
        }

        _sqlTransformer = SQLTransformerFactory.getSQLTransformer(DBManagerUtil.getDB());
    }

    private String _transformFromHQLToJPQL(String sql) {
        String newSQL = _transformedSqls.get(sql);

        if (newSQL != null) {
            return newSQL;
        }

        newSQL = _sqlTransformer.transform(sql);

        Function[] functions = { HQLToJPQLTransformerLogic.getPositionalParameterFunction(),
                HQLToJPQLTransformerLogic.getNotEqualsFunction(),
                HQLToJPQLTransformerLogic.getCompositeIdMarkerFunction() };

        for (Function<String, String> function : functions) {
            newSQL = function.apply(newSQL);
        }

        _transformedSqls.put(sql, newSQL);

        return newSQL;
    }

    private String _transformFromJPQLToHQL(String sql) {
        String newSQL = _transformedSqls.get(sql);

        if (newSQL != null) {
            return newSQL;
        }

        newSQL = _sqlTransformer.transform(sql);

        Function<String, String> countFunction = JPQLToHQLTransformerLogic.getCountFunction();

        newSQL = countFunction.apply(newSQL);

        _transformedSqls.put(sql, newSQL);

        return newSQL;
    }

    private static final SQLTransformer _instance = new SQLTransformer();

    private com.liferay.portal.dao.sql.transformer.SQLTransformer _sqlTransformer;
    private Map<String, String> _transformedSqls;

}