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1 package nabble.model;
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2
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3 import java.sql.Connection;
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4 import java.sql.PreparedStatement;
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5 import java.sql.ResultSet;
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6 import java.sql.SQLException;
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7 import java.sql.Statement;
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8 import java.sql.Types;
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9 import java.util.ArrayList;
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10 import java.util.List;
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11 import fschmidt.db.postgres.DbDatabaseImpl;
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12
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13
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14 final class TagImpl {
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15
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16 private TagImpl() {} // never
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17
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18 static void addTag(Site site,Node node,User user,String label) {
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19 try {
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20 Connection con = site.getDb().getConnection();
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21 PreparedStatement stmt = con.prepareStatement(
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22 "insert into tag (node_id,user_id,label) values (?,?,?)"
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23 );
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24 if( node == null ) {
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25 stmt.setNull( 1, Types.INTEGER );
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26 } else {
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27 stmt.setLong( 1, node.getId() );
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28 }
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29 if( user == null ) {
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30 stmt.setNull( 2, Types.INTEGER );
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31 } else {
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32 stmt.setLong( 2, user.getId() );
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33 }
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34 stmt.setString( 3, label );
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35 DbDatabaseImpl.executeUpdateIgnoringDuplicateKeys(stmt);
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36 stmt.close();
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37 con.close();
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38 } catch(SQLException e) {
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39 throw new RuntimeException(e);
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40 }
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41 }
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42
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43 static int countTags(SiteKey siteKey,String sqlCondition) {
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44 try {
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45 Connection con = siteKey.getDb().getConnection();
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46 try {
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47 Statement stmt = con.createStatement();
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48 ResultSet rs = stmt.executeQuery(
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49 "select count(*) as n from tag where " + sqlCondition
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50 );
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51 rs.next();
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52 int n = rs.getInt("n");
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53 rs.close();
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54 stmt.close();
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55 return n;
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56 } finally {
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57 con.close();
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58 }
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59 } catch(SQLException e) {
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60 throw new RuntimeException("sqlCondition = "+sqlCondition,e);
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61 }
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62 }
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63
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64 static List<String> findTagLabels(Site site,String sqlCondition) {
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65 try {
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66 List<String> list = new ArrayList<String>();
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67 Connection con = site.getDb().getConnection();
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68 Statement stmt = con.createStatement();
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69 ResultSet rs = stmt.executeQuery(
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70 "select distinct label from tag where " + sqlCondition
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71 );
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72 while( rs.next() ) {
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73 list.add( rs.getString("label") );
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74 }
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75 rs.close();
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76 stmt.close();
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77 con.close();
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78 return list;
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79 } catch(SQLException e) {
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80 throw new RuntimeException(e);
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81 }
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82 }
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83
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84 static List<Long> findTagUserIds(Site site,String sqlCondition) {
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85 try {
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86 List<Long> list = new ArrayList<Long>();
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87 Connection con = site.getDb().getConnection();
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88 Statement stmt = con.createStatement();
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89 ResultSet rs = stmt.executeQuery(
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90 "select distinct user_id from tag where " + sqlCondition
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91 );
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92 while( rs.next() ) {
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93 list.add( rs.getLong("user_id") );
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94 }
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95 rs.close();
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96 stmt.close();
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97 con.close();
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98 return list;
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99 } catch(SQLException e) {
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100 throw new RuntimeException(e);
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101 }
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102 }
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103
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104 static List<Long> findTagNodeIds(Site site,String sqlCondition) {
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105 try {
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106 List<Long> list = new ArrayList<Long>();
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107 Connection con = site.getDb().getConnection();
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108 Statement stmt = con.createStatement();
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109 ResultSet rs = stmt.executeQuery(
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110 "select distinct node_id from tag where " + sqlCondition
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111 );
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112 while( rs.next() ) {
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113 list.add( rs.getLong("node_id") );
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114 }
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115 rs.close();
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116 stmt.close();
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117 con.close();
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118 return list;
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119 } catch(SQLException e) {
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120 throw new RuntimeException(e);
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121 }
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122 }
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123
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124 static void deleteTags(SiteKey siteKey,String sqlCondition) {
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125 try {
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126 Connection con = siteKey.getDb().getConnection();
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127 Statement stmt = con.createStatement();
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128 stmt.executeUpdate(
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129 "delete from tag where " + sqlCondition
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130 );
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131 stmt.close();
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132 con.close();
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133 } catch(SQLException e) {
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134 throw new RuntimeException(e);
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135 }
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136 }
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137
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138 }
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