1 | /*
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2 | * DBInfo.java
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3 | * Copyright (C) 2008 New Zealand Digital Library, http://www.nzdl.org
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4 | *
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5 | * This program is free software; you can redistribute it and/or modify
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6 | * it under the terms of the GNU General Public License as published by
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7 | * the Free Software Foundation; either version 2 of the License, or
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8 | * (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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18 | */
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19 | package org.greenstone.gsdl3.util;
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20 |
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21 | import java.util.Vector;
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22 | import java.util.HashMap;
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23 | import java.util.Set;
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24 | /** class to hold info from a gdbm (or equiv) query
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25 | * maps a String key to a list of Strings (values)
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26 | * at the moment, the user must know if something has a single value or not
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27 | */
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28 | public class DBInfo {
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29 |
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30 | protected HashMap info_map_;
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31 |
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32 | public DBInfo() {
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33 | info_map_ = new HashMap();
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34 | }
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35 |
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36 | // methods for keys that can have a single value
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37 |
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38 | /** set the value for a key - replaces any existing value */
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39 | public void setInfo(String key, String value) {
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40 | Vector v = new Vector();
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41 | v.add(value);
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42 | info_map_.put(key, v);
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43 | }
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44 |
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45 | /** get the value - used for keys that have one value, otherwise just
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46 | * returns the first one */
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47 | public String getInfo(String key) {
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48 | Vector items = (Vector)info_map_.get(key);
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49 | if (items==null) {
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50 | return "";
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51 | }
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52 | return (String)items.firstElement();
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53 | }
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54 |
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55 | // methods for keys that can have multiple values
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56 |
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57 | /** add a value to a key - for keys that can have multiple values */
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58 | public void addInfo(String key, String value) {
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59 | Vector v = (Vector)info_map_.get(key);
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60 | if (v==null) {
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61 | v = new Vector();
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62 | }
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63 | v.add(value);
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64 | info_map_.put(key, v);
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65 | }
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66 | /** return a vector of all values associated with a key
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67 | * @return Vector of Strings
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68 | */
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69 | public Vector getMultiInfo(String key) {
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70 | return (Vector)info_map_.get(key);
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71 | }
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72 |
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73 | /** returns a list of all the keys in the info */
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74 | public Set getKeys() {
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75 | return info_map_.keySet();
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76 | }
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77 | /** returns the Info as a string */
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78 | public String toString() {
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79 | return info_map_.toString();
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80 |
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81 | }
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82 | }
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