org.eobjects.metamodel.jdbc.JdbcInsertBuilder 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.PreparedStatement;
import java.sql.SQLException;

import org.eobjects.metamodel.insert.AbstractRowInsertionBuilder;
import org.eobjects.metamodel.insert.RowInsertionBuilder;
import org.eobjects.metamodel.jdbc.dialects.IQueryRewriter;
import org.eobjects.metamodel.query.FromItem;
import org.eobjects.metamodel.schema.Column;
import org.eobjects.metamodel.schema.Table;
import org.eobjects.metamodel.util.FileHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * {@link RowInsertionBuilder} that issues an SQL INSERT statement
 * 
 * @author Kasper Sørensen
 */
final class JdbcInsertBuilder extends AbstractRowInsertionBuilder {

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

    private final boolean _inlineValues;
    private final IQueryRewriter _queryRewriter;

    public JdbcInsertBuilder(JdbcUpdateCallback updateCallback, Table table, IQueryRewriter queryRewriter) {
        this(updateCallback, table, false, queryRewriter);
    }

    public JdbcInsertBuilder(JdbcUpdateCallback updateCallback, Table table, boolean isInlineValues,
            IQueryRewriter queryRewriter) {
        super(updateCallback, table);
        if (!(table instanceof JdbcTable)) {
            throw new IllegalArgumentException("Not a valid JDBC table: " + table);
        }

        _inlineValues = isInlineValues;
        _queryRewriter = queryRewriter;
    }

    @Override
    public void execute() {
        final String sql = createSqlStatement();
        logger.debug("Insert statement created: {}", sql);
        final JdbcUpdateCallback updateCallback = getUpdateCallback();
        final boolean reuseStatement = !_inlineValues;
        final PreparedStatement st = updateCallback.getPreparedStatement(sql, reuseStatement);
        try {
            if (reuseStatement) {
                Column[] columns = getColumns();
                Object[] values = getValues();
                boolean[] explicitNulls = getExplicitNulls();
                int valueCounter = 1;
                for (int i = 0; i < columns.length; i++) {
                    boolean explicitNull = explicitNulls[i];
                    if (values[i] != null || explicitNull) {
                        st.setObject(valueCounter, values[i]);
                        valueCounter++;
                    }
                }
            }
            updateCallback.executePreparedStatement(st, reuseStatement);
        } catch (SQLException e) {
            throw JdbcUtils.wrapException(e, "execute insert statement: " + sql);
        } finally {
            if (_inlineValues) {
                FileHelper.safeClose(st);
            }
        }
    }

    protected String createSqlStatement() {
        final Object[] values = getValues();
        final Table table = getTable();
        final StringBuilder sb = new StringBuilder();

        final String tableLabel = _queryRewriter.rewriteFromItem(new FromItem(table));

        sb.append("INSERT INTO ");
        sb.append(tableLabel);
        sb.append(" (");
        Column[] columns = getColumns();
        boolean[] explicitNulls = getExplicitNulls();
        boolean firstValue = true;
        for (int i = 0; i < columns.length; i++) {
            if (values[i] != null || explicitNulls[i]) {
                if (firstValue) {
                    firstValue = false;
                } else {
                    sb.append(',');
                }
                String columnName = columns[i].getName();
                columnName = getUpdateCallback().quoteIfNescesary(columnName);
                sb.append(columnName);
            }
        }

        sb.append(") VALUES (");
        firstValue = true;
        for (int i = 0; i < columns.length; i++) {
            if (values[i] != null || explicitNulls[i]) {
                if (firstValue) {
                    firstValue = false;
                } else {
                    sb.append(',');
                }
                if (_inlineValues) {
                    sb.append(JdbcUtils.getValueAsSql(columns[i], values[i], _queryRewriter));
                } else {
                    sb.append('?');
                }
            }
        }
        sb.append(")");
        String sql = sb.toString();
        return sql;
    }

}