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SQLite.Shell Maven / Gradle / Ivy

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package SQLite;

import SQLite.*;
import java.io.*;
import java.util.*;

/**
 * SQLite command line shell. This is a partial reimplementaion
 * of sqlite/src/shell.c and can be invoked by:

* * * java SQLite.Shell [OPTIONS] database [SHELLCMD] * or * java -jar sqlite.jar [OPTIONS] database [SHELLCMD] * */ public class Shell implements Callback { Database db; boolean echo; int count; int mode; boolean showHeader; String tableName; String sep; String cols[]; int colwidth[]; String destTable; PrintWriter pw; PrintWriter err; static final int MODE_Line = 0; static final int MODE_Column = 1; static final int MODE_List = 2; static final int MODE_Semi = 3; static final int MODE_Html = 4; static final int MODE_Insert = 5; static final int MODE_Insert2 = 6; public Shell(PrintWriter pw, PrintWriter err) { this.pw = pw; this.err = err; } public Shell(PrintStream ps, PrintStream errs) { pw = new PrintWriter(ps); err = new PrintWriter(errs); } protected Object clone() { Shell s = new Shell(this.pw, this.err); s.db = db; s.echo = echo; s.mode = mode; s.count = 0; s.showHeader = showHeader; s.tableName = tableName; s.sep = sep; s.colwidth = colwidth; return s; } static public String sql_quote_dbl(String str) { if (str == null) { return "NULL"; } int i, single = 0, dbl = 0; for (i = 0; i < str.length(); i++) { if (str.charAt(i) == '\'') { single++; } else if (str.charAt(i) == '"') { dbl++; } } if (dbl == 0) { return "\"" + str + "\""; } StringBuffer sb = new StringBuffer("\""); for (i = 0; i < str.length(); i++) { char c = str.charAt(i); if (c == '"') { sb.append("\"\""); } else { sb.append(c); } } return sb.toString(); } static public String sql_quote(String str) { if (str == null) { return "NULL"; } int i, single = 0, dbl = 0; for (i = 0; i < str.length(); i++) { if (str.charAt(i) == '\'') { single++; } else if (str.charAt(i) == '"') { dbl++; } } if (single == 0) { return "'" + str + "'"; } if (dbl == 0) { return "\"" + str + "\""; } StringBuffer sb = new StringBuffer("'"); for (i = 0; i < str.length(); i++) { char c = str.charAt(i); if (c == '\'') { sb.append("''"); } else { sb.append(c); } } return sb.toString(); } static String html_quote(String str) { if (str == null) { return "NULL"; } StringBuffer sb = new StringBuffer(); for (int i = 0; i < str.length(); i++) { char c = str.charAt(i); if (c == '<') { sb.append("<"); } else if (c == '>') { sb.append(">"); } else if (c == '&') { sb.append("&"); } else { int x = c; if (x < 32 || x > 127) { sb.append("&#" + x + ";"); } else { sb.append(c); } } } return sb.toString(); } static boolean is_numeric(String str) { try { Double d = Double.valueOf(str); } catch (java.lang.Exception e) { return false; } return true; } void set_table_name(String str) { if (str == null) { tableName = ""; return; } if (db.is3()) { tableName = Shell.sql_quote_dbl(str); } else { tableName = Shell.sql_quote(str); } } public void columns(String args[]) { cols = args; } public void types(String args[]) { /* Empty body to satisfy SQLite.Callback interface. */ } public boolean newrow(String args[]) { int i; String tname; switch (mode) { case Shell.MODE_Line: if (args.length == 0) { break; } if (count++ > 0) { pw.println(""); } for (i = 0; i < args.length; i++) { pw.println(cols[i] + " = " + args[i] == null ? "NULL" : args[i]); } break; case Shell.MODE_Column: String csep = ""; if (count++ == 0) { colwidth = new int[args.length]; for (i = 0; i < args.length; i++) { int w, n; w = cols[i].length(); if (w < 10) { w = 10; } colwidth[i] = w; if (showHeader) { pw.print(csep + cols[i]); csep = " "; } } if (showHeader) { pw.println(""); } } if (args.length == 0) { break; } csep = ""; for (i = 0; i < args.length; i++) { pw.print(csep + (args[i] == null ? "NULL" : args[i])); csep = " "; } pw.println(""); break; case Shell.MODE_Semi: case Shell.MODE_List: if (count++ == 0 && showHeader) { for (i = 0; i < args.length; i++) { pw.print(cols[i] + (i == args.length - 1 ? "\n" : sep)); } } if (args.length == 0) { break; } for (i = 0; i < args.length; i++) { pw.print(args[i] == null ? "NULL" : args[i]); if (mode == Shell.MODE_Semi) { pw.print(";"); } else if (i < args.length - 1) { pw.print(sep); } } pw.println(""); break; case MODE_Html: if (count++ == 0 && showHeader) { pw.print(""); for (i = 0; i < args.length; i++) { pw.print("" + html_quote(cols[i]) + ""); } pw.println(""); } if (args.length == 0) { break; } pw.print(""); for (i = 0; i < args.length; i++) { pw.print("" + html_quote(args[i]) + ""); } pw.println(""); break; case MODE_Insert: if (args.length == 0) { break; } tname = tableName; if (destTable != null) { tname = destTable; } pw.print("INSERT INTO " + tname + " VALUES("); for (i = 0; i < args.length; i++) { String tsep = i > 0 ? "," : ""; if (args[i] == null) { pw.print(tsep + "NULL"); } else if (is_numeric(args[i])) { pw.print(tsep + args[i]); } else { pw.print(tsep + sql_quote(args[i])); } } pw.println(");"); break; case MODE_Insert2: if (args.length == 0) { break; } tname = tableName; if (destTable != null) { tname = destTable; } pw.print("INSERT INTO " + tname + " VALUES("); for (i = 0; i < args.length; i++) { String tsep = i > 0 ? "," : ""; pw.print(tsep + args[i]); } pw.println(");"); break; } return false; } void do_meta(String line) { StringTokenizer st = new StringTokenizer(line.toLowerCase()); int n = st.countTokens(); if (n <= 0) { return; } String cmd = st.nextToken(); String args[] = new String[n - 1]; int i = 0; while (st.hasMoreTokens()) { args[i] = st.nextToken(); ++i; } if (cmd.compareTo(".dump") == 0) { new DBDump(this, args); return; } if (cmd.compareTo(".echo") == 0) { if (args.length > 0 && (args[0].startsWith("y") || args[0].startsWith("on"))) { echo = true; } return; } if (cmd.compareTo(".exit") == 0) { try { db.close(); } catch (Exception e) { } System.exit(0); } if (cmd.compareTo(".header") == 0) { if (args.length > 0 && (args[0].startsWith("y") || args[0].startsWith("on"))) { showHeader = true; } return; } if (cmd.compareTo(".help") == 0) { pw.println(".dump ?TABLE? ... Dump database in text fmt"); pw.println(".echo ON|OFF Command echo on or off"); pw.println(".enc ?NAME? Change encoding"); pw.println(".exit Exit program"); pw.println(".header ON|OFF Display headers on or off"); pw.println(".help This message"); pw.println(".mode MODE Set output mode to\n" + " line, column, insert\n" + " list, or html"); pw.println(".mode insert TABLE Generate SQL insert stmts"); pw.println(".schema ?PATTERN? List table schema"); pw.println(".separator STRING Set separator string"); pw.println(".tables ?PATTERN? List table names"); return; } if (cmd.compareTo(".mode") == 0) { if (args.length > 0) { if (args[0].compareTo("line") == 0) { mode = Shell.MODE_Line; } else if (args[0].compareTo("column") == 0) { mode = Shell.MODE_Column; } else if (args[0].compareTo("list") == 0) { mode = Shell.MODE_List; } else if (args[0].compareTo("html") == 0) { mode = Shell.MODE_Html; } else if (args[0].compareTo("insert") == 0) { mode = Shell.MODE_Insert; if (args.length > 1) { destTable = args[1]; } } } return; } if (cmd.compareTo(".separator") == 0) { if (args.length > 0) { sep = args[0]; } return; } if (cmd.compareTo(".tables") == 0) { TableResult t = null; if (args.length > 0) { try { String qarg[] = new String[1]; qarg[0] = args[0]; t = db.get_table("SELECT name FROM sqlite_master " + "WHERE type='table' AND " + "name LIKE '%%%q%%' " + "ORDER BY name", qarg); } catch (Exception e) { err.println("SQL Error: " + e); err.flush(); } } else { try { t = db.get_table("SELECT name FROM sqlite_master " + "WHERE type='table' ORDER BY name"); } catch (Exception e) { err.println("SQL Error: " + e); err.flush(); } } if (t != null) { for (i = 0; i < t.nrows; i++) { String tab = ((String[]) t.rows.elementAt(i))[0]; if (tab != null) { pw.println(tab); } } } return; } if (cmd.compareTo(".schema") == 0) { if (args.length > 0) { try { String qarg[] = new String[1]; qarg[0] = args[0]; db.exec("SELECT sql FROM sqlite_master " + "WHERE type!='meta' AND " + "name LIKE '%%%q%%' AND " + "sql NOTNULL " + "ORDER BY type DESC, name", this, qarg); } catch (Exception e) { err.println("SQL Error: " + e); err.flush(); } } else { try { db.exec("SELECT sql FROM sqlite_master " + "WHERE type!='meta' AND " + "sql NOTNULL " + "ORDER BY tbl_name, type DESC, name", this); } catch (Exception e) { err.println("SQL Error: " + e); err.flush(); } } return; } if (cmd.compareTo(".enc") == 0) { try { db.set_encoding(args.length > 0 ? args[0] : null); } catch (Exception e) { err.println("" + e); err.flush(); } return; } if (cmd.compareTo(".rekey") == 0) { try { db.rekey(args.length > 0 ? args[0] : null); } catch (Exception e) { err.println("" + e); err.flush(); } return; } err.println("Unknown command '" + cmd + "'"); err.flush(); } String read_line(BufferedReader is, String prompt) { try { if (prompt != null) { pw.print(prompt); pw.flush(); } String line = is.readLine(); return line; } catch (IOException e) { return null; } } void do_input(BufferedReader is) { String line, sql = null; String prompt = "SQLITE> "; while ((line = read_line(is, prompt)) != null) { if (echo) { pw.println(line); } if (line.length() > 0 && line.charAt(0) == '.') { do_meta(line); } else { if (sql == null) { sql = line; } else { sql = sql + " " + line; } if (Database.complete(sql)) { try { db.exec(sql, this); } catch (Exception e) { if (!echo) { err.println(sql); } err.println("SQL Error: " + e); err.flush(); } sql = null; prompt = "SQLITE> "; } else { prompt = "SQLITE? "; } } pw.flush(); } if (sql != null) { err.println("Incomplete SQL: " + sql); err.flush(); } } void do_cmd(String sql) { if (db == null) { return; } if (sql.length() > 0 && sql.charAt(0) == '.') { do_meta(sql); } else { try { db.exec(sql, this); } catch (Exception e) { err.println("SQL Error: " + e); err.flush(); } } } public static void main(String args[]) { String key = null; Shell s = new Shell(System.out, System.err); s.mode = Shell.MODE_List; s.sep = "|"; s.showHeader = false; s.db = new Database(); String dbname = null, sql = null; for (int i = 0; i < args.length; i++) { if(args[i].compareTo("-html") ==0) { s.mode = Shell.MODE_Html; } else if (args[i].compareTo("-list") == 0) { s.mode = Shell.MODE_List; } else if (args[i].compareTo("-line") == 0) { s.mode = Shell.MODE_Line; } else if (i < args.length - 1 && args[i].compareTo("-separator") == 0) { ++i; s.sep = args[i]; } else if (args[i].compareTo("-header") == 0) { s.showHeader = true; } else if (args[i].compareTo("-noheader") == 0) { s.showHeader = false; } else if (args[i].compareTo("-echo") == 0) { s.echo = true; } else if (args[i].compareTo("-key") == 0) { ++i; key = args[i]; } else if (dbname == null) { dbname = args[i]; } else if (sql == null) { sql = args[i]; } else { System.err.println("Arguments: ?OPTIONS? FILENAME ?SQL?"); System.exit(1); } } if (dbname == null) { System.err.println("No database file given"); System.exit(1); } try { s.db.open(dbname, 0); } catch (Exception e) { System.err.println("Unable to open database: " + e); System.exit(1); } if (key != null) { try { s.db.key(key); } catch (Exception e) { System.err.println("Unable to set key: " + e); System.exit(1); } } if (sql != null) { s.do_cmd(sql); s.pw.flush(); } else { BufferedReader is = new BufferedReader(new InputStreamReader(System.in)); s.do_input(is); s.pw.flush(); } try { s.db.close(); } catch (Exception ee) { } } } /** * Internal class for dumping an entire database. * It contains a special callback interface to traverse the * tables of the current database and output create SQL statements * and for the data insert SQL statements. */ class DBDump implements Callback { Shell s; DBDump(Shell s, String tables[]) { this.s = s; s.pw.println("BEGIN TRANSACTION;"); if (tables == null || tables.length == 0) { try { s.db.exec("SELECT name, type, sql FROM sqlite_master " + "WHERE type!='meta' AND sql NOT NULL " + "ORDER BY substr(type,2,1), name", this); } catch (Exception e) { s.err.println("SQL Error: " + e); s.err.flush(); } } else { String arg[] = new String[1]; for (int i = 0; i < tables.length; i++) { arg[0] = tables[i]; try { s.db.exec("SELECT name, type, sql FROM sqlite_master " + "WHERE tbl_name LIKE '%q' AND type!='meta' " + " AND sql NOT NULL " + " ORDER BY substr(type,2,1), name", this, arg); } catch (Exception e) { s.err.println("SQL Error: " + e); s.err.flush(); } } } s.pw.println("COMMIT;"); } public void columns(String col[]) { /* Empty body to satisfy SQLite.Callback interface. */ } public void types(String args[]) { /* Empty body to satisfy SQLite.Callback interface. */ } public boolean newrow(String args[]) { if (args.length != 3) { return true; } s.pw.println(args[2] + ";"); if (args[1].compareTo("table") == 0) { Shell s2 = (Shell) s.clone(); s2.mode = Shell.MODE_Insert; s2.set_table_name(args[0]); String qargs[] = new String[1]; qargs[0] = args[0]; try { if (s2.db.is3()) { TableResult t = null; t = s2.db.get_table("PRAGMA table_info('%q')", qargs); String query; if (t != null) { StringBuffer sb = new StringBuffer(); String sep = ""; sb.append("SELECT "); for (int i = 0; i < t.nrows; i++) { String col = ((String[]) t.rows.elementAt(i))[1]; sb.append(sep + "quote(" + Shell.sql_quote_dbl(col) + ")"); sep = ","; } sb.append(" from '%q'"); query = sb.toString(); s2.mode = Shell.MODE_Insert2; } else { query = "SELECT * from '%q'"; } s2.db.exec(query, s2, qargs); } else { s2.db.exec("SELECT * from '%q'", s2, qargs); } } catch (Exception e) { s.err.println("SQL Error: " + e); s.err.flush(); return true; } } return false; } }





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