aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/database/QueryBuilder.java
blob: 17165db82fc953601147f6a5b8572629d2123309 (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
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
/*
 * 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.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
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 = new HashMap<>();
    private Connection connection;
    private PreparedStatement statement;
    private final String query;
    private final boolean returnGeneratedKeys;
    
    private QueryBuilder(DataSource dataSource, String query, boolean returnGeneratedKeys) throws SQLException {
        this.query = query;
        this.returnGeneratedKeys = returnGeneratedKeys;
        if (query != null) {
            connection = dataSource.getConnection();
            String parsedQuery = parse(query.trim(), indexMap);
            try {
                if (returnGeneratedKeys) {
                    statement = connection.prepareStatement(parsedQuery, Statement.RETURN_GENERATED_KEYS);
                } else {
                    statement = connection.prepareStatement(parsedQuery);
                }
            } catch (SQLException error) {
                connection.close();
                throw error;
            }
        }
    }
    
    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<>();
                        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, false);
    }

    public static QueryBuilder create(DataSource dataSource, String query, boolean returnGeneratedKeys) throws SQLException {
        return new QueryBuilder(dataSource, query, returnGeneratedKeys);
    }
    
    private List<Integer> indexes(String name) {
        name = name.toLowerCase();
        List<Integer> result = indexMap.get(name);
        if (result == null) {
            result = new LinkedList<>();
        }
        return result;
    }
    
    public QueryBuilder setBoolean(String name, boolean value) throws SQLException {
        for (int i : indexes(name)) {
            try {
                statement.setBoolean(i, value);
            } catch (SQLException error) {
                statement.close();
                connection.close();
                throw error;
            }
        }
        return this;
    }
    
    public QueryBuilder setInteger(String name, int value) throws SQLException {
        for (int i : indexes(name)) {
            try {
                statement.setInt(i, value);
            } catch (SQLException error) {
                statement.close();
                connection.close();
                throw error;
            }
        }
        return this;
    }
    
    public QueryBuilder setLong(String name, long value) throws SQLException {
        for (int i : indexes(name)) {
            try {
                statement.setLong(i, value);
            } catch (SQLException error) {
                statement.close();
                connection.close();
                throw error;
            }
        }
        return this;
    }
    
    public QueryBuilder setDouble(String name, double value) throws SQLException {
        for (int i : indexes(name)) {
            try {
                statement.setDouble(i, value);
            } catch (SQLException error) {
                statement.close();
                connection.close();
                throw error;
            }
        }
        return this;
    }
    
    public QueryBuilder setString(String name, String value) throws SQLException {
        for (int i : indexes(name)) {
            try {
                if (value == null) {
                    statement.setNull(i, Types.VARCHAR);
                } else {
                    statement.setString(i, value);
                }
            } catch (SQLException error) {
                statement.close();
                connection.close();
                throw error;
            }
        }
        return this;
    }
    
    public QueryBuilder setDate(String name, Date value) throws SQLException {
        for (int i : indexes(name)) {
            try {
                if (value == null) {
                    statement.setNull(i, Types.TIMESTAMP);
                } else {
                    statement.setTimestamp(i, new Timestamp(value.getTime()));
                }
            } catch (SQLException error) {
                statement.close();
                connection.close();
                throw error;
            }
        }
        return this;
    }
    
    public QueryBuilder setBytes(String name, byte[] value) throws SQLException {
        for (int i : indexes(name)) {
            try {
                if (value == null) {
                    statement.setNull(i, Types.VARCHAR);
                } else {
                    statement.setBytes(i, value);
                }
            } catch (SQLException error) {
                statement.close();
                connection.close();
                throw error;
            }
        }
        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));
                    } else if (method.getReturnType().equals(byte[].class)) {
                        setBytes(name, (byte[]) method.invoke(object));
                    }
                } catch (IllegalAccessException | InvocationTargetException error) {
                }
            }
        }
        
        return this;
    }
    
    private interface ResultSetProcessor<T> {
        public void process(T object, ResultSet resultSet) throws SQLException;
    }
    
    public <T extends Factory> T executeQuerySingle(T prototype) throws SQLException {
        Collection<T> result = executeQuery(prototype);
        if (!result.isEmpty()) {
            return result.iterator().next();
        } else {
            return null;
        }
    }
    
    public <T extends Factory> Collection<T> executeQuery(T prototype) throws SQLException {
        List<T> result = new LinkedList<T>();
        
        if (query != null) {
        
            try {

                try (ResultSet resultSet = statement.executeQuery()) {

                    ResultSetMetaData resultMetaData = resultSet.getMetaData();

                    List<ResultSetProcessor<T>> processors = new LinkedList<>();

                    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);

                            // Check if column exists
                            boolean column = false;
                            for (int i = 1; i <= resultMetaData.getColumnCount(); i++) {
                                if (name.equalsIgnoreCase(resultMetaData.getColumnLabel(i))) {
                                    column = true;
                                    break;
                                }
                            }
                            if (!column) {
                                continue;
                            }

                            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 | 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 | 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 | 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 | 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 | 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 | InvocationTargetException error) {
                                        }
                                    }
                                });
                            }
                        }
                    }

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

            } finally {
                statement.close();
                connection.close();
            }
        }

        return result;
    }

    public long executeUpdate() throws SQLException {
        
        if (query != null) {
            try {
                statement.executeUpdate();
                if (returnGeneratedKeys) {
                    ResultSet resultSet = statement.getGeneratedKeys();
                    if (resultSet.next()) {
                        return resultSet.getLong(1);
                    }
                }
            } finally {
                statement.close();
                connection.close();
            }
        }
        return 0;
    }
    
}