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 / function / dataaccess / UpdateFunction.java @ 46517
History | View | Annotate | Download (7.95 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.function.dataaccess; |
||
25 | |||
26 | 44750 | jjdelcerro | import java.util.ArrayList; |
27 | 45199 | jjdelcerro | import java.util.HashMap; |
28 | 44738 | jjdelcerro | import java.util.List; |
29 | 45199 | jjdelcerro | import java.util.Map; |
30 | 44738 | jjdelcerro | import org.apache.commons.lang3.Range; |
31 | 44750 | jjdelcerro | import org.apache.commons.lang3.tuple.ImmutablePair; |
32 | import org.apache.commons.lang3.tuple.Pair; |
||
33 | import org.gvsig.expressionevaluator.Code; |
||
34 | 44738 | jjdelcerro | import org.gvsig.expressionevaluator.Codes; |
35 | import org.gvsig.expressionevaluator.ExpressionRuntimeException; |
||
36 | import org.gvsig.expressionevaluator.Interpreter; |
||
37 | 44750 | jjdelcerro | import org.gvsig.expressionevaluator.Optimizer; |
38 | import org.gvsig.expressionevaluator.SymbolTable; |
||
39 | 44738 | jjdelcerro | import org.gvsig.expressionevaluator.impl.DALFunctions; |
40 | import org.gvsig.fmap.dal.DALLocator; |
||
41 | import org.gvsig.fmap.dal.DataManager; |
||
42 | 44748 | jjdelcerro | import static org.gvsig.fmap.dal.DataManager.FUNCTION_SELECT; |
43 | 44738 | jjdelcerro | import org.gvsig.fmap.dal.DataStore; |
44 | import org.gvsig.fmap.dal.feature.Feature; |
||
45 | import org.gvsig.fmap.dal.feature.FeatureQuery; |
||
46 | import org.gvsig.fmap.dal.feature.FeatureStore; |
||
47 | 44752 | jjdelcerro | import org.gvsig.expressionevaluator.Code.Callable; |
48 | 45199 | jjdelcerro | import org.gvsig.expressionevaluator.CodeBuilder; |
49 | import org.gvsig.expressionevaluator.ExpressionUtils; |
||
50 | 44856 | jjdelcerro | import org.gvsig.expressionevaluator.spi.AbstractFunction; |
51 | 45199 | jjdelcerro | import static org.gvsig.fmap.dal.DataManager.FUNCTION_UPDATE; |
52 | import org.gvsig.fmap.dal.feature.EditableFeature; |
||
53 | import org.gvsig.fmap.dal.feature.FeatureSet; |
||
54 | 44738 | jjdelcerro | |
55 | /**
|
||
56 | *
|
||
57 | * @author jjdelcerro
|
||
58 | */
|
||
59 | 45127 | jjdelcerro | @SuppressWarnings("UseSpecificCatch") |
60 | 45199 | jjdelcerro | public class UpdateFunction |
61 | extends AbstractFunction
|
||
62 | implements Optimizer.FunctionOptimizer {
|
||
63 | 44738 | jjdelcerro | |
64 | 45199 | jjdelcerro | public UpdateFunction() {
|
65 | super(DALFunctions.GROUP_DATA_ACCESS,
|
||
66 | FUNCTION_UPDATE, |
||
67 | Range.is(6),
|
||
68 | "bla bla bla",
|
||
69 | "UPDATE {{tablename}} SET column1 = exp1, column2 = exp2, ... WHERE expression;"
|
||
70 | ); |
||
71 | } |
||
72 | 44738 | jjdelcerro | |
73 | 45199 | jjdelcerro | @Override
|
74 | public boolean isHidden() { |
||
75 | return false; |
||
76 | } |
||
77 | 44738 | jjdelcerro | |
78 | 45199 | jjdelcerro | @Override
|
79 | public boolean allowConstantFolding() { |
||
80 | return false; |
||
81 | } |
||
82 | 44738 | jjdelcerro | |
83 | 45199 | jjdelcerro | @Override
|
84 | public boolean useArgumentsInsteadObjects() { |
||
85 | return true; |
||
86 | } |
||
87 | 44738 | jjdelcerro | |
88 | 45199 | jjdelcerro | @Override
|
89 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
||
90 | throw new UnsupportedOperationException(); |
||
91 | 44750 | jjdelcerro | } |
92 | 44738 | jjdelcerro | |
93 | 45199 | jjdelcerro | private static final int TABLE = 0; |
94 | private static final int WHERE = 1; |
||
95 | |||
96 | @Override
|
||
97 | public Object call(Interpreter interpreter, Codes args) throws Exception { |
||
98 | // UPDATE( store, where, column1, column2, column3, exp1, exp2, exp3)
|
||
99 | // indices 0 1 2 3 4 5 6 7
|
||
100 | // num_columns = (args.size()-2)/2 --> (8-2)/2 --> 3
|
||
101 | // first_column = 2
|
||
102 | // first_exp = num_columns +2 --> 5
|
||
103 | |||
104 | SymbolTable symbolTable = interpreter.getSymbolTable(); |
||
105 | |||
106 | int num_columns = (args.size() - 2) / 2; |
||
107 | int first_column = 2; |
||
108 | int first_exp = num_columns + 2; |
||
109 | |||
110 | Code.Identifier storeName = (Code.Identifier) args.get(TABLE); |
||
111 | Code where = args.get(WHERE); |
||
112 | if (where.code() == Code.CONSTANT) {
|
||
113 | if (((Code.Constant) where).value() == null) { |
||
114 | where = null;
|
||
115 | } |
||
116 | 45117 | jjdelcerro | } |
117 | 45199 | jjdelcerro | Map<String, Code> values = new HashMap<>(); |
118 | for (int i = 0; i < num_columns; i++) { |
||
119 | Code.Identifier column = (Code.Identifier) args.get(first_column + i); |
||
120 | Code exp = args.get(first_exp + i); |
||
121 | values.put(column.name(), exp); |
||
122 | 44750 | jjdelcerro | } |
123 | 45199 | jjdelcerro | |
124 | try {
|
||
125 | DataStore store = this.getStore(storeName.name());
|
||
126 | if (store == null) { |
||
127 | throw new ExpressionRuntimeException("Cant locate the store '" + storeName + "' in function '" + FUNCTION_SELECT + "'."); |
||
128 | } |
||
129 | if (!(store instanceof FeatureStore)) { |
||
130 | throw new ExpressionRuntimeException("The store'" + storeName + "' is not valid for function '" + FUNCTION_SELECT + "', a FeatureStore is required."); |
||
131 | } |
||
132 | FeatureStore featureStore = (FeatureStore) store; |
||
133 | FeatureSet features; |
||
134 | if (where == null) { |
||
135 | features = featureStore.getFeatureSet(); |
||
136 | } else {
|
||
137 | where = this.replaceLocalReferences(symbolTable, where);
|
||
138 | 45308 | fdiaz | FeatureQuery query = featureStore.createFeatureQuery(where.toString(), (String)null, true); |
139 | 45199 | jjdelcerro | query.retrievesAllAttributes(); |
140 | features = featureStore.getFeatureSet(query); |
||
141 | } |
||
142 | if (features == null) { |
||
143 | return 0; |
||
144 | } |
||
145 | long count = 0; |
||
146 | featureStore.edit(); |
||
147 | for (Feature feature : features) {
|
||
148 | EditableFeature ef = feature.getEditable(); |
||
149 | for (String column : values.keySet()) { |
||
150 | Code exp = values.get(column); |
||
151 | exp = this.replaceLocalReferences(symbolTable, exp);
|
||
152 | Object value = interpreter.run(exp);
|
||
153 | ef.set(column, value); |
||
154 | |||
155 | // TODO: Tener en cuenta aqui llamar a algo que no dispare el concurrent modificacion exception.
|
||
156 | featureStore.update(ef); |
||
157 | } |
||
158 | count++; |
||
159 | } |
||
160 | featureStore.finishEditing(); |
||
161 | return count;
|
||
162 | } catch (ExpressionRuntimeException ex) {
|
||
163 | throw ex;
|
||
164 | } catch (Exception ex) { |
||
165 | throw new ExpressionRuntimeException("Problems calling '" + FUNCTION_SELECT + "' function", ex); |
||
166 | 44738 | jjdelcerro | } |
167 | } |
||
168 | |||
169 | 45199 | jjdelcerro | protected DataStore getStore(String storeName) { |
170 | DataManager dataManager = DALLocator.getDataManager(); |
||
171 | DataStore store = dataManager.getStoresRepository().getStore(storeName); |
||
172 | return store;
|
||
173 | } |
||
174 | 44738 | jjdelcerro | |
175 | 45199 | jjdelcerro | @Override
|
176 | public Code optimize(Optimizer optimizer, Callable caller) { |
||
177 | return caller; // Don't optimize SELECT |
||
178 | } |
||
179 | |||
180 | private Code replaceLocalReferences(SymbolTable symbolTable, Code where) {
|
||
181 | try {
|
||
182 | List<Pair<Code, Code>> replaces = new ArrayList<>(); |
||
183 | CodeBuilder codeBuilder = ExpressionUtils.createCodeBuilder(); |
||
184 | Code where2 = where.clone(); |
||
185 | where2.accept((Object o) -> {
|
||
186 | if (o == null) { |
||
187 | return;
|
||
188 | } |
||
189 | Code code = (Code) o; |
||
190 | if( code.code()==Code.IDENTIFIER ) {
|
||
191 | String id = ((Code.Identifier)code).name();
|
||
192 | if( id.startsWith("@") ) { |
||
193 | replaces.add(new ImmutablePair(
|
||
194 | code, |
||
195 | codeBuilder.constant(symbolTable.value(id.substring(1)))
|
||
196 | )); |
||
197 | 45117 | jjdelcerro | } |
198 | 44750 | jjdelcerro | } |
199 | 45199 | jjdelcerro | }); |
200 | |||
201 | if (replaces.isEmpty()) {
|
||
202 | return where;
|
||
203 | } |
||
204 | for (Pair<Code, Code> replace : replaces) {
|
||
205 | if (replace != null) { |
||
206 | where2.replace(replace.getLeft(), replace.getRight()); |
||
207 | 45117 | jjdelcerro | } |
208 | 45199 | jjdelcerro | } |
209 | return where2;
|
||
210 | } catch (Exception ex) { |
||
211 | throw new ExpressionRuntimeException("Can't resolve local variables.", ex); |
||
212 | 44750 | jjdelcerro | } |
213 | } |
||
214 | |||
215 | 44738 | jjdelcerro | } |