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 @ 44748
History | View | Annotate | Download (7.91 KB)
1 |
/**
|
---|---|
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 |
import org.gvsig.expressionevaluator.Code; |
28 |
import org.gvsig.expressionevaluator.Code.Caller; |
29 |
import org.gvsig.expressionevaluator.CodeBuilder; |
30 |
import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator; |
31 |
import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
32 |
import org.gvsig.expressionevaluator.Grammar; |
33 |
import org.gvsig.expressionevaluator.Statement; |
34 |
import org.gvsig.expressionevaluator.Statement.StatementContext; |
35 |
import org.gvsig.expressionevaluator.impl.DALFunctions; |
36 |
import org.gvsig.expressionevaluator.impl.DefaultCodeBuilder.BaseCodes; |
37 |
import org.gvsig.expressionevaluator.impl.DefaultStatement; |
38 |
import org.gvsig.expressionevaluator.impl.DefaultStatement.ArgsBuilderFromNames; |
39 |
import org.gvsig.expressionevaluator.impl.function.dataaccess.ExistsFunction; |
40 |
import org.gvsig.expressionevaluator.spi.AbstractGrammarFactory; |
41 |
import static org.gvsig.fmap.dal.DataManager.FUNCTION_FOREING_VALUE; |
42 |
import static org.gvsig.fmap.dal.DataManager.FUNCTION_SELECT; |
43 |
import static org.gvsig.fmap.dal.DataManager.FUNCTION_SELECT_COUNT; |
44 |
|
45 |
/**
|
46 |
*
|
47 |
* @author jjdelcerro
|
48 |
*/
|
49 |
public class DataAccessGrammarFactory extends AbstractGrammarFactory { |
50 |
|
51 |
private Grammar grammar;
|
52 |
|
53 |
private class ExistsStatementBuilder extends DefaultStatement.StatementBuilderBase { |
54 |
|
55 |
private final String listID; |
56 |
private final String existsID; |
57 |
|
58 |
public ExistsStatementBuilder(String listID, String existsID) { |
59 |
super(ExistsFunction.NAME, new ArgsBuilderFromNames(listID,existsID)); |
60 |
this.listID = listID;
|
61 |
this.existsID = existsID;
|
62 |
} |
63 |
|
64 |
@Override
|
65 |
public Code build(StatementContext context) {
|
66 |
|
67 |
CodeBuilder codeBuilder = context.getCodeBuilder(); |
68 |
Caller code = (Caller) super.build(context);
|
69 |
BaseCodes args = (BaseCodes) code.parameters(); |
70 |
if( args.size()<2 || args.get("ID")==null ) { |
71 |
String exists_id = "EXISTS"+UUID.randomUUID().toString().replaceAll("-", ""); |
72 |
args.add("ID", codeBuilder.constant(exists_id));
|
73 |
} |
74 |
code = codeBuilder.function(ExistsFunction.NAME, args); |
75 |
return code;
|
76 |
} |
77 |
|
78 |
} |
79 |
|
80 |
public DataAccessGrammarFactory() {
|
81 |
super(DALFunctions.GRAMMAR_NAME, true); |
82 |
} |
83 |
|
84 |
@Override
|
85 |
public Grammar create(Object... parameters) { |
86 |
ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
87 |
if( this.grammar==null ) { |
88 |
Grammar theGrammar = manager.createGrammar(this.getName());
|
89 |
Statement stmt;
|
90 |
|
91 |
theGrammar.addReservedWord("EXISTS");
|
92 |
theGrammar.addReservedWord("SELECT");
|
93 |
theGrammar.addReservedWord("FROM");
|
94 |
theGrammar.addReservedWord("WHERE");
|
95 |
theGrammar.addReservedWord("ORDER");
|
96 |
theGrammar.addReservedWord("DESC");
|
97 |
theGrammar.addReservedWord("ASC");
|
98 |
theGrammar.addReservedWord("BY");
|
99 |
|
100 |
stmt = theGrammar.createStatement("EXISTS");
|
101 |
stmt.addRule(stmt.require_any_token("EXISTS"));
|
102 |
stmt.addRule(stmt.require_any_token("("));
|
103 |
stmt.addRule(stmt.require_expression("LIST"));
|
104 |
stmt.addRule(stmt.optional_any_token(",")
|
105 |
.addRuleOnTrue(stmt.require_expression("ID"))
|
106 |
); |
107 |
stmt.addRule(stmt.require_any_token(")"));
|
108 |
stmt.builder(new ExistsStatementBuilder("LIST","ID")); |
109 |
theGrammar.addStatement(stmt); |
110 |
|
111 |
stmt = theGrammar.createStatement("FOREING_VALUE");
|
112 |
stmt.addRule(stmt.require_any_token("FOREING"));
|
113 |
stmt.addRule(stmt.require_any_token("VALUE"));
|
114 |
stmt.addRule(stmt.require_any_token("FROM"));
|
115 |
stmt.addRule(stmt.require_identifiers("IDENTIFIERS",".")); |
116 |
stmt.code( |
117 |
FUNCTION_FOREING_VALUE, |
118 |
stmt.args_names("IDENTIFIERS")
|
119 |
); |
120 |
theGrammar.addStatement(stmt); |
121 |
|
122 |
stmt = theGrammar.createStatement("SELECT");
|
123 |
stmt.addRule(stmt.require_any_token("SELECT"));
|
124 |
stmt.addRule(stmt.require_any_token("*","1")); |
125 |
stmt.addRule(stmt.require_any_token("FROM"));
|
126 |
stmt.addRule(stmt.require_identifier("TABLE"));
|
127 |
stmt.addRule(stmt.optional_any_token("WHERE")
|
128 |
.addRuleOnTrue(stmt.require_expression("WHERE"))
|
129 |
); |
130 |
|
131 |
stmt.addRule(stmt.optional_any_token("ORDER")
|
132 |
.addRuleOnTrue(stmt.require_any_token("BY"))
|
133 |
.addRuleOnTrue( |
134 |
stmt.repeat() |
135 |
.addRule(stmt.require_expression("ORDER#"))
|
136 |
.addRule(stmt.switch_token() |
137 |
.addCase("ASC",
|
138 |
stmt.set_expression("ORDER_MODE#", true) |
139 |
) |
140 |
.addCase("DESC",
|
141 |
stmt.set_expression("ORDER_MODE#", false) |
142 |
) |
143 |
.addDefault( |
144 |
stmt.set_expression("ORDER_MODE#", true) |
145 |
) |
146 |
) |
147 |
.addRule( |
148 |
stmt.optional_any_token(",")
|
149 |
.addRuleOnFalse(stmt.break_loop()) |
150 |
) |
151 |
) |
152 |
); |
153 |
stmt.addRule(stmt.optional_any_token("LIMIT")
|
154 |
.addRuleOnTrue(stmt.require_expression("LIMIT"))
|
155 |
); |
156 |
stmt.addRule(stmt.require_any_token(";"));
|
157 |
stmt.code( |
158 |
FUNCTION_SELECT, |
159 |
stmt.args_names("TABLE","WHERE","ORDER#","ORDER_MODE#","LIMIT") |
160 |
); |
161 |
theGrammar.addStatement(stmt); |
162 |
|
163 |
stmt = theGrammar.createStatement("SELECT_COUNT");
|
164 |
stmt.addRule(stmt.require_any_token("SELECT"));
|
165 |
stmt.addRule(stmt.require_any_token("COUNT"));
|
166 |
stmt.addRule(stmt.require_any_token("("));
|
167 |
stmt.addRule(stmt.require_any_token("*"));
|
168 |
stmt.addRule(stmt.require_any_token(")"));
|
169 |
stmt.addRule(stmt.require_any_token("FROM"));
|
170 |
stmt.addRule(stmt.require_identifier("TABLE"));
|
171 |
stmt.addRule(stmt.optional_any_token("WHERE")
|
172 |
.addRuleOnTrue(stmt.require_expression("WHERE"))
|
173 |
); |
174 |
stmt.addRule(stmt.require_any_token(";"));
|
175 |
stmt.code( |
176 |
FUNCTION_SELECT_COUNT, |
177 |
stmt.args_names("TABLE","WHERE") |
178 |
); |
179 |
theGrammar.addStatement(stmt); |
180 |
|
181 |
this.grammar = theGrammar;
|
182 |
} |
183 |
return grammar;
|
184 |
} |
185 |
|
186 |
public static final void selfRegister() { |
187 |
ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
188 |
manager.registerGrammar(new DataAccessGrammarFactory());
|
189 |
} |
190 |
} |