org.eobjects.metamodel.jdbc.JdbcUtils Maven / Gradle / Ivy

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/**
 * eobjects.org MetaModel
 * Copyright (C) 2010 eobjects.org
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.eobjects.metamodel.jdbc;

import java.sql.SQLException;
import java.util.List;

import org.eobjects.metamodel.MetaModelException;
import org.eobjects.metamodel.jdbc.dialects.IQueryRewriter;
import org.eobjects.metamodel.query.FilterItem;
import org.eobjects.metamodel.query.QueryParameter;
import org.eobjects.metamodel.schema.Column;
import org.eobjects.metamodel.schema.ColumnType;
import org.eobjects.metamodel.util.FormatHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public final class JdbcUtils {

    private static final Logger logger = LoggerFactory.getLogger(JdbcUtils.class);

    public static MetaModelException wrapException(SQLException e, String actionDescription) throws MetaModelException {

        if (logger.isWarnEnabled()) {
            logger.warn("Could not " + actionDescription + ": " + e.getMessage(), e);
            logger.warn("Error code={}, SQL state={}", e.getErrorCode(), e.getSQLState());

            final SQLException nextException = e.getNextException();
            if (nextException != null) {
                logger.warn("Next SQL exception: " + nextException.getMessage(), nextException);
            }
        }

        return new MetaModelException("Could not " + actionDescription, e);
    }

    public static String getValueAsSql(Column column, Object value, IQueryRewriter queryRewriter) {
        if (value == null) {
            return "NULL";
        }
        final ColumnType columnType = column.getType();
        if (columnType.isLiteral() && value instanceof String) {
            value = queryRewriter.escapeQuotes((String) value);
        }
        String formatSqlValue = FormatHelper.formatSqlValue(columnType, value);
        return formatSqlValue;
    }

    public static String createWhereClause(List whereItems, IQueryRewriter queryRewriter,
            boolean inlineValues) {
        if (whereItems.isEmpty()) {
            return "";
        }
        StringBuilder sb = new StringBuilder();
        sb.append(" WHERE ");
        boolean firstValue = true;
        for (FilterItem whereItem : whereItems) {
            if (firstValue) {
                firstValue = false;
            } else {
                sb.append(" AND ");
            }
            if (!inlineValues) {
                if (!whereItem.isCompoundFilter()) {
                    // replace operator with parameter
                    whereItem = new FilterItem(whereItem.getSelectItem(), whereItem.getOperator(), new QueryParameter());
                }
            }
            final String whereItemLabel = queryRewriter.rewriteFilterItem(whereItem);
            sb.append(whereItemLabel);
        }
        return sb.toString();
    }
}