svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.db / org.gvsig.fmap.dal.db.jdbc / src / main / java / org / gvsig / fmap / dal / store / jdbc2 / spi / expressionbuilder / formatters / $Constant.java @ 46050
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1 | 46010 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | *
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4 | * Copyright (C) 2007-2020 gvSIG Association.
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5 | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | * as published by the Free Software Foundation; either version 3
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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21 | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | */
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24 | package org.gvsig.fmap.dal.store.jdbc2.spi.expressionbuilder.formatters; |
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25 | |||
26 | import java.util.Objects; |
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27 | import org.apache.commons.lang3.StringUtils; |
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28 | import org.gvsig.expressionevaluator.ExpressionBuilder; |
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29 | import org.gvsig.expressionevaluator.ExpressionBuilder.Function; |
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30 | import org.gvsig.expressionevaluator.ExpressionBuilder.Value; |
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31 | import org.gvsig.expressionevaluator.ExpressionUtils; |
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32 | import org.gvsig.expressionevaluator.Formatter; |
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33 | import org.gvsig.expressionevaluator.SymbolTable; |
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34 | import org.gvsig.fmap.dal.SQLBuilder; |
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35 | import static org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase.PROP_SYMBOLTABLE; |
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36 | 46050 | omartinez | import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_$CONSTANT; |
37 | 46010 | jjdelcerro | |
38 | /**
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39 | *
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40 | * @author jjdelcerro
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41 | */
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42 | 46050 | omartinez | public class $Constant implements Formatter<Value> { |
43 | 46010 | jjdelcerro | |
44 | private final SQLBuilder sqlbuilder; |
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45 | private final Formatter<Value> formatter; |
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46 | |||
47 | 46050 | omartinez | public $Constant(SQLBuilder sqlbuilder, Formatter<Value> formatter) { |
48 | 46010 | jjdelcerro | this.sqlbuilder = sqlbuilder;
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49 | this.formatter = formatter;
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50 | } |
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51 | |||
52 | @Override
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53 | public boolean canApply(ExpressionBuilder.Value value) { |
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54 | if (value instanceof ExpressionBuilder.Function) { |
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55 | 46050 | omartinez | return StringUtils.equalsIgnoreCase(FUNCTION_$CONSTANT, ((Function) value).name()); |
56 | 46010 | jjdelcerro | } |
57 | return false; |
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58 | } |
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59 | |||
60 | @Override
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61 | public String format(Value value) { |
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62 | return resolve(this.sqlbuilder.expression(), this.formatter, value); |
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63 | } |
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64 | |||
65 | public static boolean isConstant(Value value) { |
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66 | if( value instanceof ExpressionBuilder.Constant) { |
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67 | return true; |
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68 | } |
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69 | return value instanceof ExpressionBuilder.Function && |
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70 | 46050 | omartinez | StringUtils.equalsIgnoreCase(((ExpressionBuilder.Function)value).name(),FUNCTION_$CONSTANT);
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71 | 46010 | jjdelcerro | } |
72 | |||
73 | public static String resolve(Value value) { |
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74 | ExpressionBuilder builder = ExpressionUtils.createExpressionBuilder(); |
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75 | return resolve(builder, null, value); |
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76 | } |
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77 | |||
78 | public static String resolve(ExpressionBuilder builder, Formatter<Value> formatter, Value value) { |
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79 | if( value instanceof ExpressionBuilder.Constant) { |
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80 | Object x = ((ExpressionBuilder.Constant)value).value();
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81 | return builder.constant(x).toString(formatter);
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82 | } else if( value instanceof ExpressionBuilder.Function && |
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83 | 46050 | omartinez | StringUtils.equalsIgnoreCase(((ExpressionBuilder.Function)value).name(),FUNCTION_$CONSTANT) ) {
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84 | 46010 | jjdelcerro | SymbolTable symbolTable = (SymbolTable) value.getProperty(PROP_SYMBOLTABLE); |
85 | Object x = ExpressionUtils.evaluate(symbolTable, value.toString());
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86 | return builder.constant(x).toString(formatter);
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87 | } |
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88 | throw new RuntimeException("Expected constant value or $$CONSTANT function ("+Objects.toString(value)+")."); |
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89 | } |
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90 | } |