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/* |
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* |
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* Copyright 2014-2020, Armenak Grigoryan, and individual contributors as indicated |
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* by the @authors tag. See the copyright.txt in the distribution for a |
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* full listing of individual contributors. |
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* |
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* This is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU Lesser General Public License as |
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* published by the Free Software Foundation; either version 2.1 of |
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* the License, or (at your option) any later version. |
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* |
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* This software is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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*/ |
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package com.strider.datadefender.report; |
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import com.strider.datadefender.DataDefenderException; |
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import com.strider.datadefender.database.IDbFactory; |
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import com.strider.datadefender.database.metadata.TableMetaData.ColumnMetaData; |
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import com.strider.datadefender.database.sqlbuilder.ISqlBuilder; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.nio.charset.StandardCharsets; |
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import java.sql.Clob; |
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import java.sql.ResultSet; |
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import java.sql.SQLException; |
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import java.sql.Statement; |
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import java.util.HashSet; |
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import java.util.ArrayList; |
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import java.util.List; |
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import org.apache.commons.io.IOUtils; |
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import lombok.extern.log4j.Log4j2; |
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import org.apache.commons.lang3.StringUtils; |
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/** |
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* |
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* @author Armenak Grigoryan |
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*/ |
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@Log4j2 |
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public class ReportUtil { |
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public static int rowCount(final IDbFactory factory, final String tableName) throws DataDefenderException { |
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final ISqlBuilder sqlBuilder = factory.createSQLBuilder(); |
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final String table = sqlBuilder.prefixSchema(tableName); |
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// Getting number of records in the table |
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final String queryCount = "SELECT count(*) FROM " + table; |
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log.debug("Executing query against database: " + queryCount); |
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int rowCount = 0; |
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try (Statement stmt = factory.getConnection().createStatement(); |
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ResultSet resultSet = stmt.executeQuery(queryCount);) { |
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resultSet.next(); |
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rowCount = resultSet.getInt(1); |
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} catch (SQLException sqle) { |
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log.error(sqle.toString()); |
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} |
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return rowCount; |
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} |
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public static List<String> sampleData(final IDbFactory factory, final ColumnMetaData metaData) throws IOException, DataDefenderException { |
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final ISqlBuilder sqlBuilder = factory.createSQLBuilder(); |
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String querySample = ""; |
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String select = "SELECT "; |
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if (!metaData.getColumnType().equals("CLOB") && !factory.getVendorName().equals("mssql")) { |
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select = select + "DISTINCT "; |
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} |
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querySample = sqlBuilder.buildSelectWithLimit( |
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select + metaData.getColumnName() + " FROM " |
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+ sqlBuilder.prefixSchema(metaData.getTable().getTableName()) |
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+ " WHERE " + metaData.getColumnName() + " IS NOT NULL", |
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5 |
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); |
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log.debug("Executing query against database: " + querySample); |
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final List<String> sampleDataList = new ArrayList<>(); |
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try (Statement stmt = factory.getConnection().createStatement(); |
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ResultSet resultSet = stmt.executeQuery(querySample);) { |
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while (resultSet.next()) { |
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String tmp; |
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if (metaData.getColumnType().equals("CLOB")) { |
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Clob clob = resultSet.getClob(1); |
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InputStream is = clob.getAsciiStream(); |
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tmp = IOUtils.toString(is, StandardCharsets.UTF_8.name()); |
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} else { |
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tmp = resultSet.getString(1); |
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} |
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if (StringUtils.isNotBlank(tmp)) { |
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sampleDataList.add(tmp); |
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tmp = null; |
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} |
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} |
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} catch (SQLException sqle) { |
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log.error(sqle.toString()); |
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} |
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// Removing duplicates |
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List<String> sampleDataListWithoutDuplicates = |
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new ArrayList<>(new HashSet<>(sampleDataList)); |
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return sampleDataListWithoutDuplicates; |
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} |
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} |
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|
armenak /
DataDefender
