aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/database/QueryBuilder.java
blob: d05f48c0998d8b134e655f456f994de626445b1a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
/*
 * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.traccar.database;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Timestamp;
import java.sql.Types;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import javax.sql.DataSource;
import org.traccar.model.Factory;

public class QueryBuilder {
    
    private final Map<String, List<Integer>> indexMap;
    private final PreparedStatement statement;
    
    private QueryBuilder(DataSource dataSource, String query) throws SQLException {
        indexMap = new HashMap<String, List<Integer>>();
        statement = dataSource.getConnection().prepareStatement(
                parse(query, indexMap), Statement.RETURN_GENERATED_KEYS);
    }
    
    private static String parse(String query, Map<String, List<Integer>> paramMap) {

        int length = query.length();
        StringBuilder parsedQuery = new StringBuilder(length);
        boolean inSingleQuote = false;
        boolean inDoubleQuote = false;
        int index = 1;

        for (int i = 0; i < length; i++) {

            char c = query.charAt(i);

            // String end
            if (inSingleQuote) {
                if (c == '\'') {
                    inSingleQuote = false;
                }
            } else if (inDoubleQuote) {
                if (c == '"') {
                    inDoubleQuote = false;
                }
            } else {

                // String begin
                if (c == '\'') {
                    inSingleQuote = true;
                } else if (c == '"') {
                    inDoubleQuote = true;
                } else if (c == ':' && i + 1 < length
                        && Character.isJavaIdentifierStart(query.charAt(i + 1))) {

                    // Identifier name
                    int j = i + 2;
                    while (j < length && Character.isJavaIdentifierPart(query.charAt(j))) {
                        j++;
                    }

                    String name = query.substring(i + 1, j);
                    c = '?';
                    i += name.length();
                    name = name.toLowerCase();

                    // Add to list
                    List<Integer> indexList = paramMap.get(name);
                    if (indexList == null) {
                        indexList = new LinkedList<Integer>();
                        paramMap.put(name, indexList);
                    }
                    indexList.add(index);

                    index++;
                }
            }

            parsedQuery.append(c);
        }

        return parsedQuery.toString();
    }
    
    public static QueryBuilder create(DataSource dataSource, String query) throws SQLException {
        return new QueryBuilder(dataSource, query);
    }
    
    private List<Integer> indexes(String name) {
        name = name.toLowerCase();
        List<Integer> result = indexMap.get(name);
        if (result == null) {
            result = new LinkedList<Integer>();
        }
        return result;
    }
    
    public QueryBuilder setBoolean(String name, boolean value) throws SQLException {
        for (int i : indexes(name)) {
            statement.setBoolean(i, value);
        }
        return this;
    }
    
    public QueryBuilder setInteger(String name, int value) throws SQLException {
        for (int i : indexes(name)) {
            statement.setInt(i, value);
        }
        return this;
    }
    
    public QueryBuilder setLong(String name, long value) throws SQLException {
        for (int i : indexes(name)) {
            statement.setLong(i, value);
        }
        return this;
    }
    
    public QueryBuilder setDouble(String name, double value) throws SQLException {
        for (int i : indexes(name)) {
            statement.setDouble(i, value);
        }
        return this;
    }
    
    public QueryBuilder setString(String name, String value) throws SQLException {
        for (int i : indexes(name)) {
            if (value == null) {
                statement.setNull(i, Types.VARCHAR);
            } else {
                statement.setString(i, value);
            }
        }
        return this;
    }
    
    public QueryBuilder setDate(String name, Date value) throws SQLException {
        for (int i : indexes(name)) {
            if (value == null) {
                statement.setNull(i, Types.TIMESTAMP);
            } else {
                statement.setTimestamp(i, new Timestamp(value.getTime()));
            }
        }
        return this;
    }
    
    public QueryBuilder setObject(Object object) throws SQLException {
        
        Method[] methods = object.getClass().getMethods();
        
        for (Method method : methods) {
            if (method.getName().startsWith("get") && method.getParameterTypes().length == 0) {
                String name = method.getName().substring(3);
                try {
                    if (method.getReturnType().equals(boolean.class)) {
                        setBoolean(name, (Boolean) method.invoke(object));
                    } else if (method.getReturnType().equals(int.class)) {
                        setInteger(name, (Integer) method.invoke(object));
                    } else if (method.getReturnType().equals(long.class)) {
                        setLong(name, (Long) method.invoke(object));
                    } else if (method.getReturnType().equals(double.class)) {
                        setDouble(name, (Double) method.invoke(object));
                    } else if (method.getReturnType().equals(String.class)) {
                        setString(name, (String) method.invoke(object));
                    } else if (method.getReturnType().equals(Date.class)) {
                        setDate(name, (Date) method.invoke(object));
                    }
                } catch (IllegalAccessException error) {
                } catch (InvocationTargetException error) {
                }
            }
        }
        
        return this;
    }
    
    private interface ResultSetProcessor<T> {
        public void process(T object, ResultSet resultSet) throws SQLException;
    }
    
    public <T extends Factory> Collection<T> executeQuery(T prototype) throws SQLException {
        List<T> result = new LinkedList<T>();
        
        List<ResultSetProcessor<T>> processors = new LinkedList<ResultSetProcessor<T>>();
        
        Method[] methods = prototype.getClass().getMethods();
        
        for (final Method method : methods) {
            if (method.getName().startsWith("set") && method.getParameterTypes().length == 1) {

                final String name = method.getName().substring(3);
                Class<?> parameterType = method.getParameterTypes()[0];

                if (parameterType.equals(boolean.class)) {
                    processors.add(new ResultSetProcessor<T>() {
                        @Override
                        public void process(T object, ResultSet resultSet) throws SQLException {
                            try {
                                method.invoke(object, resultSet.getBoolean(name));
                            } catch (IllegalAccessException error) {
                            } catch (InvocationTargetException error) {
                            }
                        }
                    });
                } else if (parameterType.equals(int.class)) {
                    processors.add(new ResultSetProcessor<T>() {
                        @Override
                        public void process(T object, ResultSet resultSet) throws SQLException {
                            try {
                                method.invoke(object, resultSet.getInt(name));
                            } catch (IllegalAccessException error) {
                            } catch (InvocationTargetException error) {
                            }
                        }
                    });
                } else if (parameterType.equals(long.class)) {
                    processors.add(new ResultSetProcessor<T>() {
                        @Override
                        public void process(T object, ResultSet resultSet) throws SQLException {
                            try {
                                method.invoke(object, resultSet.getLong(name));
                            } catch (IllegalAccessException error) {
                            } catch (InvocationTargetException error) {
                            }
                        }
                    });
                } else if (parameterType.equals(double.class)) {
                    processors.add(new ResultSetProcessor<T>() {
                        @Override
                        public void process(T object, ResultSet resultSet) throws SQLException {
                            try {
                                method.invoke(object, resultSet.getDouble(name));
                            } catch (IllegalAccessException error) {
                            } catch (InvocationTargetException error) {
                            }
                        }
                    });
                } else if (parameterType.equals(String.class)) {
                    processors.add(new ResultSetProcessor<T>() {
                        @Override
                        public void process(T object, ResultSet resultSet) throws SQLException {
                            try {
                                method.invoke(object, resultSet.getString(name));
                            } catch (IllegalAccessException error) {
                            } catch (InvocationTargetException error) {
                            }
                        }
                    });
                } else if (parameterType.equals(Date.class)) {
                    processors.add(new ResultSetProcessor<T>() {
                        @Override
                        public void process(T object, ResultSet resultSet) throws SQLException {
                            try {
                                method.invoke(object, new Date(resultSet.getTimestamp(name).getTime()));
                            } catch (IllegalAccessException error) {
                            } catch (InvocationTargetException error) {
                            }
                        }
                    });
                }
            }
        }
        
        ResultSet resultSet = statement.executeQuery();

        while (resultSet.next()) {
            T object = (T) prototype.create();
            for (ResultSetProcessor<T> processor : processors) {
                processor.process(object, resultSet);
            }
            result.add(object);
        }

        return result;
    }

    public long executeUpdate() throws SQLException {
        
        statement.executeUpdate();
        ResultSet resultSet = statement.getGeneratedKeys();
        if (resultSet.next()) {
            return resultSet.getLong(1);
        }
        return 0;
    }
    
}