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/*
 * Copyright  2000-2005 The Apache Software Foundation
 *
 *  Licensed 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.
 *
 */

package org.apache.tools.ant.taskdefs;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.EnumeratedAttribute;
import org.apache.tools.ant.types.FileSet;

import java.io.File;
import java.io.PrintStream;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.Reader;
import java.io.BufferedReader;
import java.io.StringReader;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.io.FileInputStream;
import java.util.Enumeration;
import java.util.StringTokenizer;
import java.util.Vector;

import java.sql.Connection;
import java.sql.Statement;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;

/**
 * Executes a series of SQL statements on a database using JDBC.
 *
 * 

Statements can * either be read in from a text file using the src attribute or from * between the enclosing SQL tags.

* *

Multiple statements can be provided, separated by semicolons (or the * defined delimiter). Individual lines within the statements can be * commented using either --, // or REM at the start of the line.

* *

The autocommit attribute specifies whether auto-commit should be * turned on or off whilst executing the statements. If auto-commit is turned * on each statement will be executed and committed. If it is turned off the * statements will all be executed as one transaction.

* *

The onerror attribute specifies how to proceed when an error occurs * during the execution of one of the statements. * The possible values are: continue execution, only show the error; * stop execution and commit transaction; * and abort execution and transaction and fail task.

* * @since Ant 1.2 * * @ant.task name="sql" category="database" */ public class SQLExec extends JDBCTask { /** * delimiters we support, "normal" and "row" */ public static class DelimiterType extends EnumeratedAttribute { public static final String NORMAL = "normal"; public static final String ROW = "row"; public String[] getValues() { return new String[] {NORMAL, ROW}; } } private int goodSql = 0; private int totalSql = 0; /** * Database connection */ private Connection conn = null; /** * files to load */ private Vector filesets = new Vector(); /** * SQL statement */ private Statement statement = null; /** * SQL input file */ private File srcFile = null; /** * SQL input command */ private String sqlCommand = ""; /** * SQL transactions to perform */ private Vector transactions = new Vector(); /** * SQL Statement delimiter */ private String delimiter = ";"; /** * The delimiter type indicating whether the delimiter will * only be recognized on a line by itself */ private String delimiterType = DelimiterType.NORMAL; /** * Print SQL results. */ private boolean print = false; /** * Print header columns. */ private boolean showheaders = true; /** * Results Output file. */ private File output = null; /** * Action to perform if an error is found **/ private String onError = "abort"; /** * Encoding to use when reading SQL statements from a file */ private String encoding = null; /** * Append to an existing file or overwrite it? */ private boolean append = false; /** * Keep the format of a sql block? */ private boolean keepformat = false; /** * Argument to Statement.setEscapeProcessing * * @since Ant 1.6 */ private boolean escapeProcessing = true; /** * Set the name of the SQL file to be run. * Required unless statements are enclosed in the build file */ public void setSrc(File srcFile) { this.srcFile = srcFile; } /** * Set an inline SQL command to execute. * NB: Properties are not expanded in this text. */ public void addText(String sql) { this.sqlCommand += sql; } /** * Adds a set of files (nested fileset attribute). */ public void addFileset(FileSet set) { filesets.addElement(set); } /** * Add a SQL transaction to execute */ public Transaction createTransaction() { Transaction t = new Transaction(); transactions.addElement(t); return t; } /** * Set the file encoding to use on the SQL files read in * * @param encoding the encoding to use on the files */ public void setEncoding(String encoding) { this.encoding = encoding; } /** * Set the delimiter that separates SQL statements. Defaults to ";"; * optional * *

For example, set this to "go" and delimitertype to "ROW" for * Sybase ASE or MS SQL Server.

*/ public void setDelimiter(String delimiter) { this.delimiter = delimiter; } /** * Set the delimiter type: "normal" or "row" (default "normal"). * *

The delimiter type takes two values - normal and row. Normal * means that any occurrence of the delimiter terminate the SQL * command whereas with row, only a line containing just the * delimiter is recognized as the end of the command.

*/ public void setDelimiterType(DelimiterType delimiterType) { this.delimiterType = delimiterType.getValue(); } /** * Print result sets from the statements; * optional, default false */ public void setPrint(boolean print) { this.print = print; } /** * Print headers for result sets from the * statements; optional, default true. */ public void setShowheaders(boolean showheaders) { this.showheaders = showheaders; } /** * Set the output file; * optional, defaults to the Ant log. */ public void setOutput(File output) { this.output = output; } /** * whether output should be appended to or overwrite * an existing file. Defaults to false. * * @since Ant 1.5 */ public void setAppend(boolean append) { this.append = append; } /** * Action to perform when statement fails: continue, stop, or abort * optional; default "abort" */ public void setOnerror(OnError action) { this.onError = action.getValue(); } /** * whether or not format should be preserved. * Defaults to false. * * @param keepformat The keepformat to set */ public void setKeepformat(boolean keepformat) { this.keepformat = keepformat; } /** * Set escape processing for statements. * * @since Ant 1.6 */ public void setEscapeProcessing(boolean enable) { escapeProcessing = enable; } /** * Load the sql file and then execute it */ public void execute() throws BuildException { Vector savedTransaction = (Vector) transactions.clone(); String savedSqlCommand = sqlCommand; sqlCommand = sqlCommand.trim(); try { if (srcFile == null && sqlCommand.length() == 0 && filesets.isEmpty()) { if (transactions.size() == 0) { throw new BuildException("Source file or fileset, " + "transactions or sql statement " + "must be set!", getLocation()); } } if (srcFile != null && !srcFile.exists()) { throw new BuildException("Source file does not exist!", getLocation()); } // deal with the filesets for (int i = 0; i < filesets.size(); i++) { FileSet fs = (FileSet) filesets.elementAt(i); DirectoryScanner ds = fs.getDirectoryScanner(getProject()); File srcDir = fs.getDir(getProject()); String[] srcFiles = ds.getIncludedFiles(); // Make a transaction for each file for (int j = 0; j < srcFiles.length; j++) { Transaction t = createTransaction(); t.setSrc(new File(srcDir, srcFiles[j])); } } // Make a transaction group for the outer command Transaction t = createTransaction(); t.setSrc(srcFile); t.addText(sqlCommand); conn = getConnection(); if (!isValidRdbms(conn)) { return; } try { statement = conn.createStatement(); statement.setEscapeProcessing(escapeProcessing); PrintStream out = System.out; try { if (output != null) { log("Opening PrintStream to output file " + output, Project.MSG_VERBOSE); out = new PrintStream( new BufferedOutputStream( new FileOutputStream(output .getAbsolutePath(), append))); } // Process all transactions for (Enumeration e = transactions.elements(); e.hasMoreElements();) { ((Transaction) e.nextElement()).runTransaction(out); if (!isAutocommit()) { log("Committing transaction", Project.MSG_VERBOSE); conn.commit(); } } } finally { if (out != null && out != System.out) { out.close(); } } } catch (IOException e) { if (!isAutocommit() && conn != null && onError.equals("abort")) { try { conn.rollback(); } catch (SQLException ex) { // ignore } } throw new BuildException(e, getLocation()); } catch (SQLException e) { if (!isAutocommit() && conn != null && onError.equals("abort")) { try { conn.rollback(); } catch (SQLException ex) { // ignore } } throw new BuildException(e, getLocation()); } finally { try { if (statement != null) { statement.close(); } if (conn != null) { conn.close(); } } catch (SQLException ex) { // ignore } } log(goodSql + " of " + totalSql + " SQL statements executed successfully"); } finally { transactions = savedTransaction; sqlCommand = savedSqlCommand; } } /** * read in lines and execute them */ protected void runStatements(Reader reader, PrintStream out) throws SQLException, IOException { StringBuffer sql = new StringBuffer(); String line = ""; BufferedReader in = new BufferedReader(reader); while ((line = in.readLine()) != null) { if (!keepformat) { line = line.trim(); } line = getProject().replaceProperties(line); if (!keepformat) { if (line.startsWith("//")) { continue; } if (line.startsWith("--")) { continue; } StringTokenizer st = new StringTokenizer(line); if (st.hasMoreTokens()) { String token = st.nextToken(); if ("REM".equalsIgnoreCase(token)) { continue; } } } if (!keepformat) { sql.append(" " + line); } else { sql.append("\n" + line); } // SQL defines "--" as a comment to EOL // and in Oracle it may contain a hint // so we cannot just remove it, instead we must end it if (!keepformat) { if (line.indexOf("--") >= 0) { sql.append("\n"); } } if ((delimiterType.equals(DelimiterType.NORMAL) && sql.toString().endsWith(delimiter)) || (delimiterType.equals(DelimiterType.ROW) && line.equals(delimiter))) { execSQL(sql.substring(0, sql.length() - delimiter.length()), out); sql.replace(0, sql.length(), ""); } } // Catch any statements not followed by ; if (!sql.equals("")) { execSQL(sql.toString(), out); } } /** * Exec the sql statement. */ protected void execSQL(String sql, PrintStream out) throws SQLException { // Check and ignore empty statements if ("".equals(sql.trim())) { return; } ResultSet resultSet = null; try { totalSql++; log("SQL: " + sql, Project.MSG_VERBOSE); boolean ret; int updateCount = 0, updateCountTotal = 0; ret = statement.execute(sql); updateCount = statement.getUpdateCount(); resultSet = statement.getResultSet(); do { if (!ret) { if (updateCount != -1) { updateCountTotal += updateCount; } } else { if (print) { printResults(resultSet, out); } } ret = statement.getMoreResults(); if (ret) { updateCount = statement.getUpdateCount(); resultSet = statement.getResultSet(); } } while (ret); log(updateCountTotal + " rows affected", Project.MSG_VERBOSE); if (print) { StringBuffer line = new StringBuffer(); line.append(updateCountTotal + " rows affected"); out.println(line); } SQLWarning warning = conn.getWarnings(); while (warning != null) { log(warning + " sql warning", Project.MSG_VERBOSE); warning = warning.getNextWarning(); } conn.clearWarnings(); goodSql++; } catch (SQLException e) { log("Failed to execute: " + sql, Project.MSG_ERR); if (!onError.equals("continue")) { throw e; } log(e.toString(), Project.MSG_ERR); } finally { if (resultSet != null) { resultSet.close(); } } } /** * print any results in the statement * @deprecated use {@link #printResults(java.sql.ResultSet, java.io.PrintStream) * the two arg version} instead. * @param out the place to print results * @throws SQLException on SQL problems. */ protected void printResults(PrintStream out) throws SQLException { ResultSet rs = null; rs = statement.getResultSet(); try { printResults(rs, out); } finally { if (rs != null) { rs.close(); } } } /** * print any results in the result set. * @param rs the resultset to print information about * @param out the place to print results * @throws SQLException on SQL problems. * @since Ant 1.6.3 */ protected void printResults(ResultSet rs, PrintStream out) throws SQLException { if (rs != null) { log("Processing new result set.", Project.MSG_VERBOSE); ResultSetMetaData md = rs.getMetaData(); int columnCount = md.getColumnCount(); StringBuffer line = new StringBuffer(); if (showheaders) { for (int col = 1; col < columnCount; col++) { line.append(md.getColumnName(col)); line.append(","); } line.append(md.getColumnName(columnCount)); out.println(line); line = new StringBuffer(); } while (rs.next()) { boolean first = true; for (int col = 1; col <= columnCount; col++) { String columnValue = rs.getString(col); if (columnValue != null) { columnValue = columnValue.trim(); } if (first) { first = false; } else { line.append(","); } line.append(columnValue); } out.println(line); line = new StringBuffer(); } } out.println(); } /** * The action a task should perform on an error, * one of "continue", "stop" and "abort" */ public static class OnError extends EnumeratedAttribute { public String[] getValues() { return new String[] {"continue", "stop", "abort"}; } } /** * Contains the definition of a new transaction element. * Transactions allow several files or blocks of statements * to be executed using the same JDBC connection and commit * operation in between. */ public class Transaction { private File tSrcFile = null; private String tSqlCommand = ""; /** * */ public void setSrc(File src) { this.tSrcFile = src; } /** * */ public void addText(String sql) { this.tSqlCommand += sql; } /** * */ private void runTransaction(PrintStream out) throws IOException, SQLException { if (tSqlCommand.length() != 0) { log("Executing commands", Project.MSG_INFO); runStatements(new StringReader(tSqlCommand), out); } if (tSrcFile != null) { log("Executing file: " + tSrcFile.getAbsolutePath(), Project.MSG_INFO); Reader reader = (encoding == null) ? new FileReader(tSrcFile) : new InputStreamReader( new FileInputStream(tSrcFile), encoding); try { runStatements(reader, out); } finally { reader.close(); } } } } }




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