-
Notifications
You must be signed in to change notification settings - Fork 689
/
Query.java
301 lines (255 loc) · 9.48 KB
/
Query.java
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
/**
* Copyright (c) 2012 Todoroo Inc
*
* See the file "LICENSE" for the full license governing this code.
*/
package com.todoroo.andlib.sql;
import static com.todoroo.andlib.sql.SqlConstants.ALL;
import static com.todoroo.andlib.sql.SqlConstants.COMMA;
import static com.todoroo.andlib.sql.SqlConstants.DISTINCT;
import static com.todoroo.andlib.sql.SqlConstants.FROM;
import static com.todoroo.andlib.sql.SqlConstants.GROUP_BY;
import static com.todoroo.andlib.sql.SqlConstants.LEFT_PARENTHESIS;
import static com.todoroo.andlib.sql.SqlConstants.LIMIT;
import static com.todoroo.andlib.sql.SqlConstants.ORDER_BY;
import static com.todoroo.andlib.sql.SqlConstants.RIGHT_PARENTHESIS;
import static com.todoroo.andlib.sql.SqlConstants.SELECT;
import static com.todoroo.andlib.sql.SqlConstants.SPACE;
import static com.todoroo.andlib.sql.SqlConstants.WHERE;
import static com.todoroo.andlib.sql.SqlTable.table;
import static java.util.Arrays.asList;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import com.todoroo.andlib.data.Property;
import com.todoroo.astrid.api.AstridApiConstants;
public final class Query {
private SqlTable table;
private String queryTemplate = null;
private final ArrayList<Criterion> criterions = new ArrayList<Criterion>();
private final ArrayList<Field> fields = new ArrayList<Field>();
private final ArrayList<Join> joins = new ArrayList<Join>();
private final ArrayList<Field> groupBies = new ArrayList<Field>();
private final ArrayList<Order> orders = new ArrayList<Order>();
private final ArrayList<Criterion> havings = new ArrayList<Criterion>();
private int limits = -1;
private boolean distinct = false;
private Query(Field... fields) {
this.fields.addAll(asList(fields));
}
public static Query select(Field... fields) {
return new Query(fields);
}
public static Query selectDistinct(Field... fields) {
Query query = new Query(fields);
query.distinct = true;
return query;
}
public Query from(SqlTable fromTable) {
this.table = fromTable;
return this;
}
public Query join(Join... join) {
joins.addAll(asList(join));
return this;
}
public Query where(Criterion criterion) {
criterions.add(criterion);
return this;
}
public Query groupBy(Field... groupBy) {
groupBies.addAll(asList(groupBy));
return this;
}
public Query orderBy(Order... order) {
orders.addAll(asList(order));
return this;
}
public Query limit(int limit) {
limits = limit;
return this;
}
public Query appendSelectFields(Property<?>... selectFields) {
this.fields.addAll(asList(selectFields));
return this;
}
@Override
public boolean equals(Object o) {
return this == o || !(o == null || getClass() != o.getClass()) && this.toString().equals(o.toString());
}
@Override
public int hashCode() {
return toString().hashCode();
}
@Override
public String toString() {
StringBuilder sql = new StringBuilder();
visitSelectClause(sql);
visitFromClause(sql);
visitJoinClause(sql);
if(queryTemplate == null) {
visitWhereClause(sql);
visitGroupByClause(sql);
visitOrderByClause(sql);
visitLimitClause(sql);
} else {
if(groupBies.size() > 0 || orders.size() > 0 ||
havings.size() > 0)
throw new IllegalStateException("Can't have extras AND query template"); //$NON-NLS-1$
sql.append(queryTemplate);
}
return sql.toString();
}
private void visitOrderByClause(StringBuilder sql) {
if (orders.isEmpty()) {
return;
}
sql.append(ORDER_BY);
for (Order order : orders) {
sql.append(SPACE).append(order).append(COMMA);
}
sql.deleteCharAt(sql.length() - 1).append(SPACE);
}
@SuppressWarnings("nls")
private void visitGroupByClause(StringBuilder sql) {
if (groupBies.isEmpty()) {
return;
}
sql.append(GROUP_BY);
for (Field groupBy : groupBies) {
sql.append(SPACE).append(groupBy).append(COMMA);
}
sql.deleteCharAt(sql.length() - 1).append(SPACE);
if (havings.isEmpty()) {
return;
}
sql.append("HAVING");
for (Criterion havingCriterion : havings) {
sql.append(SPACE).append(havingCriterion).append(COMMA);
}
sql.deleteCharAt(sql.length() - 1).append(SPACE);
}
private void visitWhereClause(StringBuilder sql) {
if (criterions.isEmpty()) {
return;
}
sql.append(WHERE);
for (Criterion criterion : criterions) {
sql.append(SPACE).append(criterion).append(SPACE);
}
}
private void visitJoinClause(StringBuilder sql) {
for (Join join : joins) {
sql.append(join).append(SPACE);
}
}
private void visitFromClause(StringBuilder sql) {
if (table == null) {
return;
}
sql.append(FROM).append(SPACE).append(table).append(SPACE);
}
private void visitSelectClause(StringBuilder sql) {
sql.append(SELECT).append(SPACE);
if(distinct)
sql.append(DISTINCT).append(SPACE);
if (fields.isEmpty()) {
sql.append(ALL).append(SPACE);
return;
}
for (Field field : fields) {
sql.append(field.toStringInSelect()).append(COMMA);
}
sql.deleteCharAt(sql.length() - 1).append(SPACE);
}
private void visitLimitClause(StringBuilder sql) {
if(limits > -1)
sql.append(LIMIT).append(SPACE).append(limits).append(SPACE);
}
public SqlTable as(String alias) {
return table(LEFT_PARENTHESIS + this.toString() + RIGHT_PARENTHESIS).as(alias);
}
public Query having(Criterion criterion) {
this.havings.add(criterion);
return this;
}
/**
* Gets a list of fields returned by this query
* @return
*/
public Property<?>[] getFields() {
return fields.toArray(new Property<?>[fields.size()]);
}
/**
* Add the SQL query template (comes after the "from")
* @param template
* @return query
*/
public Query withQueryTemplate(String template) {
queryTemplate = template;
return this;
}
/**
* Parse out properties and run query
* @param cr
* @param baseUri
* @return
*/
public Cursor queryContentResolver(ContentResolver cr, Uri baseUri) {
Uri uri = baseUri;
if(joins.size() != 0)
throw new UnsupportedOperationException("can't perform join in content resolver query"); //$NON-NLS-1$
String[] projection = new String[fields.size()];
for(int i = 0; i < projection.length; i++)
projection[i] = fields.get(i).toString();
StringBuilder groupByClause = new StringBuilder();
StringBuilder selectionClause = new StringBuilder();
StringBuilder orderClause = new StringBuilder();
if(queryTemplate != null) {
QueryTemplateHelper.queryForContentResolver(queryTemplate,
selectionClause, orderClause, groupByClause);
} else {
if(groupBies.size() > 0) {
for (Field groupBy : groupBies)
groupByClause.append(SPACE).append(groupBy).append(COMMA);
if(groupByClause.length() > 0)
groupByClause.deleteCharAt(groupByClause.length() - 1);
}
for (Criterion criterion : criterions)
selectionClause.append(criterion).append(SPACE);
for (Order order : orders)
orderClause.append(SPACE).append(order).append(COMMA);
if(orderClause.length() > 0)
orderClause.deleteCharAt(orderClause.length() - 1);
}
if(groupByClause.length() > 0)
uri = Uri.withAppendedPath(baseUri, AstridApiConstants.GROUP_BY_URI +
groupByClause.toString().trim());
return cr.query(uri, projection, selectionClause.toString(), null,
orderClause.toString());
}
/** query template helper */
public static class QueryTemplateHelper {
/** build a content resolver query */
@SuppressWarnings("nls")
public static void queryForContentResolver(String queryTemplate,
StringBuilder selectionClause, StringBuilder orderClause,
StringBuilder groupByClause) {
Pattern where = Pattern.compile("WHERE (.*?)(LIMIT|HAVING|GROUP|ORDER|\\Z)");
Matcher whereMatcher = where.matcher(queryTemplate);
if(whereMatcher.find())
selectionClause.append(whereMatcher.group(1).trim());
Pattern group = Pattern.compile("GROUP BY (.*?)(LIMIT|HAVING|ORDER|\\Z)");
Matcher groupMatcher = group.matcher(queryTemplate);
if(groupMatcher.find())
groupByClause.append(groupMatcher.group(1).trim());
Pattern order = Pattern.compile("ORDER BY (.*?)(LIMIT|HAVING|\\Z)");
Matcher orderMatcher = order.matcher(queryTemplate);
if(orderMatcher.find())
orderClause.append(orderMatcher.group(1).trim());
}
}
}