Java SQL Table Column hasTableAndColumns(Connection conn, String tableName, String... colNames)

Description

has Table And Columns

License

Apache License

Declaration

private static boolean hasTableAndColumns(Connection conn, String tableName, String... colNames)
            throws SQLException 

Method Source Code

//package com.java2s;
/*/*from w ww.  ja  v  a 2 s  .  c om*/
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

import java.util.Collection;
import java.util.HashSet;
import java.sql.Connection;
import java.sql.SQLException;

public class Main {
    private static boolean hasTableAndColumns(Connection conn, String tableName, String... colNames)
            throws SQLException {
        Collection<String> cols = new HashSet<String>();
        for (String c : colNames) {
            if (c != null) {
                cols.add(c.toLowerCase());
            }
        }
        return (hasColumns(conn, tableName, cols) || hasColumns(conn, tableName.toLowerCase(), cols)
                || hasColumns(conn, tableName.toUpperCase(), cols));
    }

    private static boolean hasColumns(Connection conn, String tableName, Collection<String> colNames)
            throws SQLException {
        try (java.sql.ResultSet res = conn.getMetaData().getColumns(null, null, tableName, null)) {
            while (res.next()) {
                String colName = res.getString("COLUMN_NAME");
                colNames.remove(colName.toLowerCase());
            }
            return colNames.isEmpty();
        }
    }
}

Related

1. hasColumn(ResultSet rs, String columnName)
2. hasColumn(ResultSet rs, String columnName)
3. hasColumn(String columnName, ResultSet resultSet)
4. hasColumn(String field, ResultSet rs)
5. hasColumns(Connection conn, String tableName, Collection colNames)
6. indent_DisplayBanner(PrintWriter out, ResultSetMetaData rsmd, int indentLevel, int[] displayColumns, int[] displayColumnWidths)
7. isColumnNullable(Connection conn, String table, String column)
8. isColumnNullable(Connection conn, String table, String column)
9. isNull(ResultSet resultSet, String columnName)