svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / main / java / org / gvsig / expressionevaluator / impl / grammars / DataAccessGrammarFactory.java @ 44750
History | View | Annotate | Download (10.4 KB)
1 | 44738 | jjdelcerro | /**
|
---|---|---|---|
2 | * gvSIG. Desktop Geographic Information System.
|
||
3 | *
|
||
4 | * Copyright (C) 2007-2020 gvSIG Association.
|
||
5 | *
|
||
6 | * This program is free software; you can redistribute it and/or
|
||
7 | * modify it under the terms of the GNU General Public License
|
||
8 | * as published by the Free Software Foundation; either version 3
|
||
9 | * of the License, or (at your option) any later version.
|
||
10 | *
|
||
11 | * This program is distributed in the hope that it will be useful,
|
||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
14 | * GNU General Public License for more details.
|
||
15 | *
|
||
16 | * You should have received a copy of the GNU General Public License
|
||
17 | * along with this program; if not, write to the Free Software
|
||
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
||
19 | * MA 02110-1301, USA.
|
||
20 | *
|
||
21 | * For any additional information, do not hesitate to contact us
|
||
22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
|
||
23 | */
|
||
24 | package org.gvsig.expressionevaluator.impl.grammars; |
||
25 | |||
26 | import java.util.UUID; |
||
27 | 44750 | jjdelcerro | import org.apache.commons.lang3.StringUtils; |
28 | 44738 | jjdelcerro | import org.gvsig.expressionevaluator.Code; |
29 | import org.gvsig.expressionevaluator.Code.Caller; |
||
30 | import org.gvsig.expressionevaluator.CodeBuilder; |
||
31 | 44750 | jjdelcerro | import org.gvsig.expressionevaluator.Codes; |
32 | 44738 | jjdelcerro | import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator; |
33 | import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
||
34 | 44750 | jjdelcerro | import org.gvsig.expressionevaluator.ExpressionSyntaxException; |
35 | 44738 | jjdelcerro | import org.gvsig.expressionevaluator.Grammar; |
36 | import org.gvsig.expressionevaluator.Statement; |
||
37 | 44750 | jjdelcerro | import org.gvsig.expressionevaluator.Statement.ArgsBuilder; |
38 | 44738 | jjdelcerro | import org.gvsig.expressionevaluator.Statement.StatementContext; |
39 | import org.gvsig.expressionevaluator.impl.DALFunctions; |
||
40 | import org.gvsig.expressionevaluator.impl.DefaultCodeBuilder.BaseCodes; |
||
41 | import org.gvsig.expressionevaluator.impl.DefaultStatement; |
||
42 | import org.gvsig.expressionevaluator.impl.DefaultStatement.ArgsBuilderFromNames; |
||
43 | import org.gvsig.expressionevaluator.impl.function.dataaccess.ExistsFunction; |
||
44 | import org.gvsig.expressionevaluator.spi.AbstractGrammarFactory; |
||
45 | 44748 | jjdelcerro | import static org.gvsig.fmap.dal.DataManager.FUNCTION_FOREING_VALUE; |
46 | import static org.gvsig.fmap.dal.DataManager.FUNCTION_SELECT; |
||
47 | import static org.gvsig.fmap.dal.DataManager.FUNCTION_SELECT_COUNT; |
||
48 | 44738 | jjdelcerro | |
49 | /**
|
||
50 | *
|
||
51 | * @author jjdelcerro
|
||
52 | */
|
||
53 | public class DataAccessGrammarFactory extends AbstractGrammarFactory { |
||
54 | |||
55 | 44750 | jjdelcerro | private Grammar grammar;
|
56 | 44738 | jjdelcerro | |
57 | 44750 | jjdelcerro | private static class ExistsStatementBuilder extends DefaultStatement.StatementBuilderBase { |
58 | 44738 | jjdelcerro | |
59 | 44750 | jjdelcerro | private final String listID; |
60 | private final String existsID; |
||
61 | 44738 | jjdelcerro | |
62 | 44750 | jjdelcerro | public ExistsStatementBuilder(String listID, String existsID) { |
63 | super(ExistsFunction.NAME, new ArgsBuilderFromNames(listID, existsID)); |
||
64 | this.listID = listID;
|
||
65 | this.existsID = existsID;
|
||
66 | } |
||
67 | 44738 | jjdelcerro | |
68 | 44750 | jjdelcerro | @Override
|
69 | public Code build(StatementContext context) {
|
||
70 | 44738 | jjdelcerro | |
71 | 44750 | jjdelcerro | CodeBuilder codeBuilder = context.getCodeBuilder(); |
72 | Caller code = (Caller) super.build(context);
|
||
73 | BaseCodes args = (BaseCodes) code.parameters(); |
||
74 | if (args.size() < 2) { |
||
75 | String exists_id = "EXISTS" + UUID.randomUUID().toString().replaceAll("-", ""); |
||
76 | args.add(codeBuilder.constant(exists_id)); |
||
77 | } else if (args.get(1) == null) { |
||
78 | String exists_id = "EXISTS" + UUID.randomUUID().toString().replaceAll("-", ""); |
||
79 | args.set(1, codeBuilder.constant(exists_id));
|
||
80 | } |
||
81 | code = codeBuilder.function(ExistsFunction.NAME, args); |
||
82 | return code;
|
||
83 | 44738 | jjdelcerro | } |
84 | 44740 | jjdelcerro | |
85 | 44750 | jjdelcerro | } |
86 | |||
87 | private static class SelectArgsBuilder implements ArgsBuilder { |
||
88 | |||
89 | public SelectArgsBuilder() {
|
||
90 | 44738 | jjdelcerro | } |
91 | 44750 | jjdelcerro | |
92 | 44738 | jjdelcerro | @Override
|
93 | 44750 | jjdelcerro | public String toString() { |
94 | return "select_args()"; |
||
95 | } |
||
96 | 44738 | jjdelcerro | |
97 | 44750 | jjdelcerro | @Override
|
98 | public Codes build(StatementContext context) {
|
||
99 | context.trace(this.toString() + ".build"); |
||
100 | CodeBuilder codeBuilder = context.getCodeBuilder(); |
||
101 | BaseCodes args = (BaseCodes) codeBuilder.args(); |
||
102 | 44738 | jjdelcerro | |
103 | 44750 | jjdelcerro | Code columns = context.getCode("COLUMNS");
|
104 | Code table = context.getCode("TABLE");
|
||
105 | Code where = context.getCode("WHERE");
|
||
106 | // Code order = context.getCode("ORDER");
|
||
107 | // Code order_mode = context.getCode("ORDER_MODE");
|
||
108 | Code limit = context.getCode("LIMIT");
|
||
109 | 44738 | jjdelcerro | |
110 | 44750 | jjdelcerro | if (columns == null) { |
111 | throw new ExpressionSyntaxException(); |
||
112 | } |
||
113 | Caller tuple = codeBuilder.tuple(); |
||
114 | args.add(tuple); |
||
115 | String s = (String) ((Code.Constant) columns).value(); |
||
116 | if (!StringUtils.equalsIgnoreCase(s, "*")) { |
||
117 | ((BaseCodes) (tuple.parameters())).add(codeBuilder.constant(1));
|
||
118 | } |
||
119 | |||
120 | args.add(codeBuilder.identifier((String) ((Code.Constant) table).value()));
|
||
121 | 44738 | jjdelcerro | |
122 | 44750 | jjdelcerro | if (where == null) { |
123 | args.add(codeBuilder.constant(null));
|
||
124 | } else {
|
||
125 | args.add(where); |
||
126 | } |
||
127 | |||
128 | int n = 1; |
||
129 | BaseCodes argsX = (BaseCodes) codeBuilder.args(); |
||
130 | while (true) { |
||
131 | String argNameX = "ORDER" + String.valueOf(n); |
||
132 | Code code = context.getCode(argNameX); |
||
133 | if (code == null) { |
||
134 | break;
|
||
135 | 44738 | jjdelcerro | } |
136 | 44750 | jjdelcerro | argsX.add(code); |
137 | n++; |
||
138 | } |
||
139 | args.add(codeBuilder.tuple(argsX)); |
||
140 | |||
141 | n = 1;
|
||
142 | argsX = (BaseCodes) codeBuilder.args(); |
||
143 | while (true) { |
||
144 | String argNameX = "ORDER_MODE" + String.valueOf(n); |
||
145 | Code code = context.getCode(argNameX); |
||
146 | if (code == null) { |
||
147 | break;
|
||
148 | } |
||
149 | argsX.add(code); |
||
150 | n++; |
||
151 | } |
||
152 | args.add(codeBuilder.tuple(argsX)); |
||
153 | |||
154 | if (limit == null) { |
||
155 | args.add(codeBuilder.constant(null));
|
||
156 | } else {
|
||
157 | args.add(limit); |
||
158 | } |
||
159 | return args;
|
||
160 | |||
161 | 44738 | jjdelcerro | } |
162 | 44750 | jjdelcerro | |
163 | } |
||
164 | |||
165 | private static class SelectCountArgsBuilder implements ArgsBuilder { |
||
166 | |||
167 | public SelectCountArgsBuilder() {
|
||
168 | 44738 | jjdelcerro | } |
169 | 44750 | jjdelcerro | |
170 | @Override
|
||
171 | public String toString() { |
||
172 | return "select_count_args()"; |
||
173 | } |
||
174 | |||
175 | @Override
|
||
176 | public Codes build(StatementContext context) {
|
||
177 | context.trace(this.toString() + ".build"); |
||
178 | CodeBuilder codeBuilder = context.getCodeBuilder(); |
||
179 | BaseCodes args = (BaseCodes) codeBuilder.args(); |
||
180 | |||
181 | Code table = context.getCode("table");
|
||
182 | Code where = context.getCode("where");
|
||
183 | |||
184 | args.add(codeBuilder.identifier((String) ((Code.Constant) table).value()));
|
||
185 | |||
186 | if (where == null) { |
||
187 | args.add(codeBuilder.constant(null));
|
||
188 | } else {
|
||
189 | args.add(where); |
||
190 | } |
||
191 | return args;
|
||
192 | } |
||
193 | |||
194 | } |
||
195 | |||
196 | public DataAccessGrammarFactory() {
|
||
197 | super(DALFunctions.GRAMMAR_NAME, true); |
||
198 | } |
||
199 | |||
200 | @Override
|
||
201 | public Grammar create(Object... parameters) { |
||
202 | ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
||
203 | if (this.grammar == null) { |
||
204 | Grammar theGrammar = manager.createGrammar(this.getName());
|
||
205 | Statement stmt;
|
||
206 | |||
207 | theGrammar.addReservedWord("EXISTS");
|
||
208 | theGrammar.addReservedWord("SELECT");
|
||
209 | theGrammar.addReservedWord("FROM");
|
||
210 | theGrammar.addReservedWord("WHERE");
|
||
211 | theGrammar.addReservedWord("ORDER");
|
||
212 | theGrammar.addReservedWord("DESC");
|
||
213 | theGrammar.addReservedWord("ASC");
|
||
214 | theGrammar.addReservedWord("BY");
|
||
215 | |||
216 | stmt = theGrammar.createStatement("EXISTS");
|
||
217 | stmt.addRule(stmt.require_any_token("EXISTS"));
|
||
218 | stmt.addRule(stmt.require_any_token("("));
|
||
219 | stmt.addRule(stmt.require_expression().capture_as("LIST"));
|
||
220 | stmt.addRule(stmt.optional_any_token(",")
|
||
221 | .addRuleOnTrue(stmt.require_expression().capture_as("ID"))
|
||
222 | ); |
||
223 | stmt.addRule(stmt.require_any_token(")"));
|
||
224 | stmt.builder(new ExistsStatementBuilder("LIST", "ID")); |
||
225 | theGrammar.addStatement(stmt); |
||
226 | |||
227 | stmt = theGrammar.createStatement("FOREING_VALUE");
|
||
228 | stmt.addRule(stmt.require_any_token("FOREING"));
|
||
229 | stmt.addRule(stmt.require_any_token("VALUE"));
|
||
230 | stmt.addRule(stmt.require_any_token("FROM"));
|
||
231 | stmt.addRule(stmt.require_identifiers(".").capture_as("IDENTIFIERS")); |
||
232 | stmt.code( |
||
233 | FUNCTION_FOREING_VALUE, |
||
234 | stmt.args_names("IDENTIFIERS")
|
||
235 | ); |
||
236 | theGrammar.addStatement(stmt); |
||
237 | |||
238 | stmt = theGrammar.createStatement("SELECT");
|
||
239 | stmt.addRule(stmt.require_any_token("SELECT"));
|
||
240 | stmt.addRule(stmt.switch_token() |
||
241 | .addCase("*", stmt.set_expression("COLUMNS", "*")) |
||
242 | .addCase("1", stmt.set_expression("COLUMNS", "1")) |
||
243 | .addDefault(stmt.fail()) |
||
244 | ); |
||
245 | stmt.addRule(stmt.require_any_token("FROM"));
|
||
246 | stmt.addRule(stmt.require_identifier().capture_as("TABLE"));
|
||
247 | stmt.addRule(stmt.optional_any_token("WHERE")
|
||
248 | .addRuleOnTrue(stmt.require_expression().capture_as("WHERE"))
|
||
249 | ); |
||
250 | |||
251 | stmt.addRule(stmt.optional_any_token("ORDER")
|
||
252 | .addRuleOnTrue(stmt.require_any_token("BY"))
|
||
253 | .addRuleOnTrue(stmt.repeat() |
||
254 | .addRule(stmt.require_expression().capture_as("ORDER#"))
|
||
255 | .addRule(stmt.switch_token() |
||
256 | .addCase("ASC", stmt.set_expression("ORDER_MODE#", true)) |
||
257 | .addCase("DESC", stmt.set_expression("ORDER_MODE#", false)) |
||
258 | .addDefault(stmt.set_expression("ORDER_MODE#", true)) |
||
259 | ) |
||
260 | .addRule(stmt.optional_any_token(",")
|
||
261 | .addRuleOnFalse(stmt.break_loop()) |
||
262 | ) |
||
263 | ) |
||
264 | ); |
||
265 | stmt.addRule(stmt.optional_any_token("LIMIT")
|
||
266 | .addRuleOnTrue(stmt.require_expression().capture_as("LIMIT"))
|
||
267 | ); |
||
268 | stmt.addRule(stmt.optional_any_token(";"));
|
||
269 | stmt.code( |
||
270 | FUNCTION_SELECT, |
||
271 | new SelectArgsBuilder()
|
||
272 | ); |
||
273 | theGrammar.addStatement(stmt); |
||
274 | |||
275 | stmt = theGrammar.createStatement("SELECT_COUNT");
|
||
276 | stmt.addRule(stmt.require_any_token("SELECT"));
|
||
277 | stmt.addRule(stmt.require_any_token("COUNT"));
|
||
278 | stmt.addRule(stmt.require_any_token("("));
|
||
279 | stmt.addRule(stmt.require_any_token("*"));
|
||
280 | stmt.addRule(stmt.require_any_token(")"));
|
||
281 | stmt.addRule(stmt.require_any_token("FROM"));
|
||
282 | stmt.addRule(stmt.require_identifier().capture_as("TABLE"));
|
||
283 | stmt.addRule(stmt.optional_any_token("WHERE")
|
||
284 | .addRuleOnTrue(stmt.require_expression().capture_as("WHERE"))
|
||
285 | ); |
||
286 | stmt.addRule(stmt.require_any_token(";"));
|
||
287 | stmt.code( |
||
288 | FUNCTION_SELECT_COUNT, |
||
289 | new SelectCountArgsBuilder()
|
||
290 | ); |
||
291 | theGrammar.addStatement(stmt); |
||
292 | |||
293 | this.grammar = theGrammar;
|
||
294 | } |
||
295 | return grammar;
|
||
296 | } |
||
297 | |||
298 | public static final void selfRegister() { |
||
299 | ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
||
300 | manager.registerGrammar(new DataAccessGrammarFactory());
|
||
301 | } |
||
302 | 44738 | jjdelcerro | } |