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227
Modules/database/DB0.java
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227
Modules/database/DB0.java
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/*
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DB0.java
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*
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* Copyright (c) 2000, Ted Nelson and Tuomas Lukka
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*
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* You may use and distribute under the terms of either the GNU Lesser
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* General Public License, either version 2 of the license or,
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* at your choice, any later version. Alternatively, you may use and
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* distribute under the terms of the XPL.
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*
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* See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of
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* the licenses.
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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 README
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* file for more details.
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*
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*/
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/*
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* Written by Tuomas Lukka
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*/
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package org.gzigzag.module;
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import org.gzigzag.*;
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import java.sql.*;
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import java.io.*;
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import java.text.*;
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import java.util.*;
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import java.awt.*;
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public class DB0 {
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public static final String rcsid = "$Id: DB0.java,v 1.9 2000/10/18 14:35:32 tjl Exp $";
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public static boolean dbg = true;
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static final void p(String s) { if(dbg) System.out.println(s); }
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static final void pa(String s) { System.out.println(s); }
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static public class StrComp implements ZZUtil.Comparator {
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public int compare(ZZCell c1, ZZCell c2) {
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return c1.getText().compareTo(c2.getText());
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}
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}
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static public class DHeadComp implements ZZUtil.Comparator {
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DHeadComp(String dim) { this.dim = dim; }
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String dim;
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public int compare(ZZCell c1, ZZCell c2) {
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return c1.h(dim, -1).getText().compareTo(
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c2.h(dim, -1).getText());
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}
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}
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static public void insertCells(ZZCell head, String x, String y,
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ResultSet rs,
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String maincol,
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Hashtable id2col
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) throws SQLException {
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ResultSetMetaData meta = rs.getMetaData();
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int n = meta.getColumnCount();
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ZZCell[] hdr = new ZZCell[n];
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ZZCell[] cur = new ZZCell[n];
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ZZCell nextnew = head;
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int mcid = -1;
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int idid = -1;
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for(int i=0; i<n; i++) {
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nextnew = cur[i] = hdr[i] = nextnew.N(x, 1);
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String name = meta.getColumnName(i+1);
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hdr[i].setText(name);
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if(maincol != null && name.equals(maincol))
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mcid = i;
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if(name.equals("id"))
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idid = i;
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}
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if(maincol != null && mcid < 0) throw new Error("Invalid main col id");
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ZZCell curhead = head;
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while(rs.next()) {
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String id = null;
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ZZCell mcol = null;
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ZZCell prev = null;
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for(int i=0; i<n; i++) {
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String s = rs.getString(i+1);
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if(s==null) s="(null)";
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cur[i] = cur[i].N(y, 1);
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cur[i].setText(s);
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if(prev != null)
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prev.connect(x, 1, cur[i]);
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prev = cur[i];
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if(i == mcid) {
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mcol = cur[i];
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/* curhead.connect("d.2", cur[i]);
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curhead = cur[i]; */
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}
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if(i == idid)
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id = s;
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}
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if(id != null && mcol != null)
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id2col.put(id, mcol);
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}
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for(int i=0; i<n; i++) {
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ZZUtil.sortRank(hdr[i], y, 1, new StrComp(), false);
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}
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// ZZUtil.sortRank(head,"d.2", 1, new StrComp(), false);
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rs.close();
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}
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static public ZZModule module = new ZZModule() {
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public void action(String id, ZZCell code,
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ZZCell target,
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ZZView v, ZZView cv,
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String key, Point pt,
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ZZScene xi) {
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try {
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if(id.equals("READMEMS")) {
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synchronized(target.getSpace()) {
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ZZSpace zz = target.getSpace();
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String x = "d.1";
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String y = "d.2";
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Hashtable id2mem = new Hashtable();
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Hashtable id2sig = new Hashtable();
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String url = "jdbc:postgresql://himalia.mit.jyu.fi/zz";
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String usr = "tjl";
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String pwd = "";
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Class.forName("org.postgresql.Driver");
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Connection db = DriverManager.getConnection(url, usr, pwd);
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Statement st = db.createStatement();
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ZZCell n = target.N("d.3", 1);
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n.setText("members");
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ResultSet rs = st.executeQuery("select * from members");
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insertCells(n, x, y, rs, "name", id2mem);
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n = n.N("d.3", 1); n.setText("sigs");
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rs = st.executeQuery("select * from sigs");
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insertCells(n, x, y, rs, "name", id2sig);
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n = n.N("d.3", 1); n.setText("positions");
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rs = st.executeQuery("select * from positions");
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insertCells(n, x, y, rs, null, null);
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// ZZCell title = target.N();
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// title.setText("<Linux>");
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// Create people rank in alphabetical order
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rs = st.executeQuery("select * from members order by name");
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ZZCell prev = null;
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while(rs.next()) {
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ZZCell curr = (ZZCell)id2mem.get(rs.getString(1));
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if(prev != null) prev.connect("d.people", 1, curr);
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prev = curr;
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}
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// Create sig rank in alphabetical order
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rs = st.executeQuery("select * from sigs order by name");
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prev = null;
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while(rs.next()) {
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ZZCell curr = (ZZCell)id2sig.get(rs.getString(1));
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if(prev != null) prev.connect("d.insigs", 1, curr);
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prev = curr;
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}
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p("Rels: ");
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// Insert relcells after the positions table
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rs = st.executeQuery("select * from positions");
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while(rs.next()) {
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String pers = rs.getString(1);
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String sig = rs.getString(2);
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// p("Rel: "+pers+" "+sig);
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ZZCell pc = (ZZCell)id2mem.get(pers);
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ZZCell sc = (ZZCell)id2sig.get(sig);
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if(pc == null || sc == null)
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throw new Error("No such relation "+pers+" "+sig);
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ZZCell relc = pc.N("d.insigs",1);
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sc.insert("d.people", 1, relc);
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relc.setText("+");
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}
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rs.close();
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// Sort the ranks of the in-which-sigs tables.
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for(Enumeration e = id2mem.elements();
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e.hasMoreElements(); ) {
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ZZCell c = (ZZCell)e.nextElement();
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ZZUtil.sortRank(c, "d.insigs", 1,
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new DHeadComp("d.people"), false);
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}
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for(Enumeration e = id2sig.elements();
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e.hasMoreElements(); ) {
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ZZCell c = (ZZCell)e.nextElement();
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ZZUtil.sortRank(c, "d.people", 1,
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new DHeadComp("d.insigs"), false);
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}
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st.close();
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db.close();
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}
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} /* else if(id.equals("IMPORT")) {
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// XXX How to give 2 arguments: the file name and the home cell
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(new XML()).load(new File(target.getText()),
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}*/
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} catch(SQLException e) {
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System.out.println(e);
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e.printStackTrace();
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} catch(ClassNotFoundException e) {
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System.out.println(e);
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e.printStackTrace();
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}
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}
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};
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}
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68
Modules/database/createscript.pl
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68
Modules/database/createscript.pl
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#!/usr/bin/perl
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#
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# Create a sample database.
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# Use the linux kernel CREDITS file as input.
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print <<'STOP';
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DROP TABLE members;
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DROP TABLE positions;
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DROP TABLE sigs;
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CREATE TABLE members (
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id INT4,
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name TEXT,
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address TEXT,
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phone TEXT,
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email TEXT,
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PRIMARY KEY(id)
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);
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CREATE TABLE positions (
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person INT4,
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sig INT4
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/* type TEXT */
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);
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CREATE TABLE sigs (
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id INT4,
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name TEXT,
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PRIMARY KEY(id)
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);
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STOP
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$/ = "\n\n";
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$id = 0;
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while(<>) {
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/^\s*N:/ or next;
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s/'//g;
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my %h;
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for(split "\n") {
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/^([A-Z]): (.*)$/ or next;
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push @{$h{$1}}, $2;
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}
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$phone = int(1000000 + rand 9000000);
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$phone =~ s/(...)(....)/\1-\2/g;
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print "INSERT INTO members VALUES ($id, '$h{N}[0]', '$h{S}[0]', '$phone', '$h{E}[0]');\n";
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$id++;
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last if $id > 100;
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}
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$sid = 0;
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for(qw/filesys mm drivers boot console vfs/) {
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print "INSERT INTO sigs VALUES ($sid, '$_');\n";
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$sid++;
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}
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my %pos;
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for(1..120) {
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$pers = int rand $id;
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$sig = int rand $sid;
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next if $pos{$pers}{$sig}++;
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print "INSERT INTO positions VALUES ($pers, $sig);\n";
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}
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18
Modules/database/zz.queries
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18
Modules/database/zz.queries
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-- Taulut
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SELECT * FROM members;
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SELECT * FROM positions;
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SELECT * FROM sigs;
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-- Kaikkien tekijöiden kaikki projektit
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SELECT members.name,sigs.name FROM members, positions, sigs WHERE members.id = positions.person AND sigs.id = positions.sig ORDER BY members.name, sigs.name;
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-- Kaikkien projektien kaikki tekijät
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SELECT sigs.name,members.name FROM members, positions, sigs WHERE members.id = positions.person AND sigs.id = positions.sig ORDER BY sigs.name, members.name;
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29
Modules/database/zz.sql
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29
Modules/database/zz.sql
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CREATE TABLE members (
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id INT4,
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fname TEXT,
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lname TEXT,
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address TEXT,
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phone TEXT,
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email TEXT,
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PRIMARY KEY(id)
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);
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CREATE TABLE positions (
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person INT4,
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sig INT4
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/* type TEXT */
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);
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CREATE TABLE sigs (
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id INT4,
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name TEXT,
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PRIMARY KEY(id)
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);
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INSERT INTO members VALUES
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(1,'Henna','Koskinen','Kuusikkokuja 4','321-564356','henna43@hotmail.com');
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INSERT INTO sigs VALUES
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(1,'helicopters');
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INSERT INTO positions VALUES
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(1,1);
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