Java tutorial
/* Copyright 2003 Sun Microsystems, Inc. ALL RIGHTS RESERVED. Use of this software is authorized pursuant to the terms of the license found at http://developer.java.sun.com/berkeley_license.html. Copyright 2003 Sun Microsystems, Inc. All Rights Reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistribution of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistribution in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. Neither the name of Sun Microsystems, Inc. or the names of contributors may be used to endorse or promote products derived from this software without specific prior written permission. This software is provided "AS IS," without a warranty of any kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICORSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. You acknowledge that this software is not designed, licensed or intended for use in the design, construction, operation or maintenance of any nuclear facility. */ /* * Copyright 2003 Sun Microsystems, Inc. ALL RIGHTS RESERVED. * Use of this software is authorized pursuant to the terms of the license found at * http://developer.java.sun.com/berkeley_license.html. */ import java.sql.*; import java.util.*; public class CreateNewType { public static void main(String[] args) { String url = "jdbc:mySubprotocol:myDataSource"; Connection con; Statement stmt; try { Class.forName("myDriver.ClassName"); } catch (java.lang.ClassNotFoundException e) { System.err.print("ClassNotFoundException: "); System.err.println(e.getMessage()); } try { con = DriverManager.getConnection(url, "myLogin", "myPassword"); stmt = con.createStatement(); String typeToCreate = null; String prompt = "Enter 's' to create a structured type " + "or 'd' to create a distinct type\n" + "and hit Return: "; do { typeToCreate = getInput(prompt) + " "; typeToCreate = typeToCreate.toLowerCase().substring(0, 1); } while (!(typeToCreate.equals("s") || typeToCreate.equals("d"))); Vector dataTypes = getDataTypes(con, typeToCreate); String typeName; String attributeName; String sqlType; prompt = "Enter the new type name and hit Return: "; typeName = getInput(prompt); String createTypeString = "create type " + typeName; if (typeToCreate.equals("d")) createTypeString += " as "; else createTypeString += " ("; String commaAndSpace = ", "; boolean firstTime = true; while (true) { System.out.println(""); prompt = "Enter an attribute name " + "(or nothing when finished) \nand hit Return: "; attributeName = getInput(prompt); if (firstTime) { if (attributeName.length() == 0) { System.out.print("Need at least one attribute;"); System.out.println(" please try again"); continue; } else { createTypeString += attributeName + " "; firstTime = false; } } else if (attributeName.length() == 0) { break; } else { createTypeString += commaAndSpace + attributeName + " "; } String localTypeName = null; String paramString = ""; while (true) { System.out.println(""); System.out.println("LIST OF TYPES YOU MAY USE: "); boolean firstPrinted = true; int length = 0; for (int i = 0; i < dataTypes.size(); i++) { DataType dataType = (DataType) dataTypes.get(i); if (!dataType.needsToBeSet()) { if (!firstPrinted) System.out.print(commaAndSpace); else firstPrinted = false; System.out.print(dataType.getSQLType()); length += dataType.getSQLType().length(); if (length > 50) { System.out.println(""); length = 0; firstPrinted = true; } } } System.out.println(""); int index; prompt = "Enter an attribute type " + "from the list and hit Return: "; sqlType = getInput(prompt); for (index = 0; index < dataTypes.size(); index++) { DataType dataType = (DataType) dataTypes.get(index); if (dataType.getSQLType().equalsIgnoreCase(sqlType) && !dataType.needsToBeSet()) { break; } } localTypeName = null; paramString = ""; if (index < dataTypes.size()) { // there was a match String params; DataType dataType = (DataType) dataTypes.get(index); params = dataType.getParams(); localTypeName = dataType.getLocalType(); if (params != null) { prompt = "Enter " + params + ": "; paramString = "(" + getInput(prompt) + ")"; } break; } else { // use the name as given prompt = "Are you sure? " + "Enter 'y' or 'n' and hit Return: "; String check = getInput(prompt) + " "; check = check.toLowerCase().substring(0, 1); if (check.equals("n")) continue; else { localTypeName = sqlType; break; } } } createTypeString += localTypeName + paramString; if (typeToCreate.equals("d")) break; } if (typeToCreate.equals("s")) createTypeString += ")"; System.out.println(""); System.out.print("Your CREATE TYPE statement as "); System.out.println("sent to your DBMS: "); System.out.println(createTypeString); System.out.println(""); stmt.executeUpdate(createTypeString); stmt.close(); con.close(); } catch (SQLException ex) { System.err.println("SQLException: " + ex.getMessage()); } } private static Vector getDataTypes(Connection con, String typeToCreate) throws SQLException { String structName = null, distinctName = null, javaName = null; // create a vector of class DataType initialized with // the SQL code, the SQL type name, and two null entries // for the local type name and the creation parameter(s) Vector dataTypes = new Vector(); dataTypes.add(new DataType(java.sql.Types.BIT, "BIT")); dataTypes.add(new DataType(java.sql.Types.TINYINT, "TINYINT")); dataTypes.add(new DataType(java.sql.Types.SMALLINT, "SMALLINT")); dataTypes.add(new DataType(java.sql.Types.INTEGER, "INTEGER")); dataTypes.add(new DataType(java.sql.Types.BIGINT, "BIGINT")); dataTypes.add(new DataType(java.sql.Types.FLOAT, "FLOAT")); dataTypes.add(new DataType(java.sql.Types.REAL, "REAL")); dataTypes.add(new DataType(java.sql.Types.DOUBLE, "DOUBLE")); dataTypes.add(new DataType(java.sql.Types.NUMERIC, "NUMERIC")); dataTypes.add(new DataType(java.sql.Types.DECIMAL, "DECIMAL")); dataTypes.add(new DataType(java.sql.Types.CHAR, "CHAR")); dataTypes.add(new DataType(java.sql.Types.VARCHAR, "VARCHAR")); dataTypes.add(new DataType(java.sql.Types.LONGVARCHAR, "LONGVARCHAR")); dataTypes.add(new DataType(java.sql.Types.DATE, "DATE")); dataTypes.add(new DataType(java.sql.Types.TIME, "TIME")); dataTypes.add(new DataType(java.sql.Types.TIMESTAMP, "TIMESTAMP")); dataTypes.add(new DataType(java.sql.Types.BINARY, "BINARY")); dataTypes.add(new DataType(java.sql.Types.VARBINARY, "VARBINARY")); dataTypes.add(new DataType(java.sql.Types.LONGVARBINARY, "LONGVARBINARY")); dataTypes.add(new DataType(java.sql.Types.NULL, "NULL")); dataTypes.add(new DataType(java.sql.Types.OTHER, "OTHER")); dataTypes.add(new DataType(java.sql.Types.BLOB, "BLOB")); dataTypes.add(new DataType(java.sql.Types.CLOB, "CLOB")); DatabaseMetaData dbmd = con.getMetaData(); ResultSet rs = dbmd.getTypeInfo(); while (rs.next()) { int codeNumber = rs.getInt("DATA_TYPE"); String dbmsName = rs.getString("TYPE_NAME"); String createParams = rs.getString("CREATE_PARAMS"); if (codeNumber == Types.STRUCT && structName == null) structName = dbmsName; else if (codeNumber == Types.DISTINCT && distinctName == null) distinctName = dbmsName; else if (codeNumber == Types.JAVA_OBJECT && javaName == null) javaName = dbmsName; else { for (int i = 0; i < dataTypes.size(); i++) { // find entry that matches the SQL code, // and if local type and params are not already set, // set them DataType type = (DataType) dataTypes.get(i); if (type.getCode() == codeNumber) { type.setLocalTypeAndParams(dbmsName, createParams); } } } } if (typeToCreate.equals("s")) { int[] types = { Types.STRUCT, Types.DISTINCT, Types.JAVA_OBJECT }; rs = dbmd.getUDTs(null, "%", "%", types); while (rs.next()) { String typeName = null; DataType dataType = null; if (dbmd.isCatalogAtStart()) typeName = rs.getString(1) + dbmd.getCatalogSeparator() + rs.getString(2) + "." + rs.getString(3); else typeName = rs.getString(2) + "." + rs.getString(3) + dbmd.getCatalogSeparator() + rs.getString(1); switch (rs.getInt(5)) { case Types.STRUCT: dataType = new DataType(Types.STRUCT, typeName); dataType.setLocalTypeAndParams(structName, null); break; case Types.DISTINCT: dataType = new DataType(Types.DISTINCT, typeName); dataType.setLocalTypeAndParams(distinctName, null); break; case Types.JAVA_OBJECT: dataType = new DataType(Types.JAVA_OBJECT, typeName); dataType.setLocalTypeAndParams(javaName, null); break; } dataTypes.add(dataType); } } return dataTypes; } private static String getInput(String prompt) throws SQLException { System.out.print(prompt); System.out.flush(); try { java.io.BufferedReader bin; bin = new java.io.BufferedReader(new java.io.InputStreamReader(System.in)); String result = bin.readLine(); return result; } catch (java.io.IOException ex) { System.out.println("Caught java.io.IOException:"); System.out.println(ex.getMessage()); return ""; } } }