svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / DefaultGrammar.java @ 44198
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1 | 44139 | jjdelcerro | package org.gvsig.expressionevaluator.impl; |
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2 | |||
3 | import org.gvsig.expressionevaluator.Grammar; |
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4 | import java.util.ArrayList; |
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5 | import java.util.Collections; |
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6 | import java.util.HashSet; |
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7 | import java.util.Iterator; |
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8 | import java.util.List; |
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9 | import java.util.Set; |
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10 | import org.apache.commons.lang3.StringUtils; |
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11 | import org.gvsig.expressionevaluator.Statement; |
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12 | import org.gvsig.expressionevaluator.Statement.StatementContext; |
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13 | |||
14 | /**
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15 | *
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16 | * @author jjdelcerro
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17 | */
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18 | public class DefaultGrammar implements Grammar { |
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19 | |||
20 | private final String name; |
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21 | private final List<Statement> statements; |
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22 | private final Set<String> reservedWords; |
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23 | |||
24 | public DefaultGrammar(String name) { |
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25 | this.name = name;
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26 | this.statements = new ArrayList<>(); |
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27 | this.reservedWords = new HashSet<>(); |
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28 | } |
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29 | |||
30 | @Override
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31 | public String getName() { |
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32 | return this.name; |
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33 | } |
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34 | |||
35 | @Override
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36 | public List<Statement> getStatements() { |
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37 | return Collections.unmodifiableList(this.statements); |
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38 | } |
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39 | |||
40 | @Override
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41 | public Statement createStatement(String name) { |
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42 | DefaultStatement stmt = new DefaultStatement(name);
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43 | return stmt;
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44 | } |
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45 | |||
46 | @Override
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47 | public void addStatement(Statement statement) { |
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48 | this.statements.add(statement);
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49 | } |
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50 | |||
51 | @Override
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52 | public Statement getApplicableStatement(StatementContext context) { |
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53 | for (Statement statement : statements) { |
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54 | if( statement.isApplicable(context) ) {
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55 | return statement;
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56 | } |
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57 | } |
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58 | return null; |
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59 | } |
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60 | |||
61 | @Override
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62 | public String toString() { |
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63 | return this.getName(); |
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64 | } |
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65 | |||
66 | @Override
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67 | public void addReservedWord(String id) { |
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68 | if( StringUtils.isBlank(id) ) {
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69 | return;
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70 | } |
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71 | this.reservedWords.add(id.toUpperCase());
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72 | } |
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73 | |||
74 | @Override
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75 | public boolean isReservedWord(String id) { |
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76 | if( StringUtils.isBlank(id) ) {
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77 | return false; |
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78 | } |
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79 | return this.reservedWords.contains(id.toUpperCase()); |
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80 | } |
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81 | |||
82 | @Override
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83 | public Iterator<Statement> iterator() { |
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84 | return this.statements.iterator(); |
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85 | } |
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86 | |||
87 | } |