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.h2 / src / main / java / org / gvsig / fmap / dal / store / h2 / expressionbuilderformatter / IsNull.java @ 44198
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1 | 44198 | jjdelcerro | package org.gvsig.fmap.dal.store.h2.expressionbuilderformatter; |
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2 | |||
3 | import java.text.MessageFormat; |
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4 | import java.util.List; |
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5 | import org.apache.commons.lang3.StringUtils; |
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6 | import org.gvsig.expressionevaluator.Code.Constant; |
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7 | import org.gvsig.expressionevaluator.ExpressionBuilder.Function; |
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8 | import static org.gvsig.expressionevaluator.ExpressionBuilder.OPERATOR_IS; |
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9 | import org.gvsig.expressionevaluator.ExpressionBuilder.Value; |
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10 | import org.gvsig.expressionevaluator.Formatter; |
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11 | import org.gvsig.fmap.dal.SQLBuilder; |
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12 | |||
13 | /**
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14 | *
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15 | * @author jjdelcerro
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16 | */
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17 | class IsNull implements Formatter<Value> { |
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18 | |||
19 | private final Formatter<Value> formatter; |
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20 | private final SQLBuilder builder; |
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21 | |||
22 | public IsNull(SQLBuilder builder, Formatter<Value> formatter) { |
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23 | this.builder = builder;
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24 | this.formatter = formatter;
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25 | } |
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26 | |||
27 | @Override
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28 | public boolean canApply(Value value) { |
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29 | if (value instanceof Function) { |
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30 | if( StringUtils.equalsIgnoreCase(OPERATOR_IS, ((Function) value).name()) ) {
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31 | List<Value> parameters = ((Function) value).parameters();
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32 | Value p2 = parameters.get(1);
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33 | if( p2 instanceof Constant && ((Constant)p2).value()==null ) { |
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34 | return true; |
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35 | } |
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36 | } |
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37 | } |
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38 | return false; |
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39 | } |
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40 | |||
41 | @Override
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42 | public String format(Value function) { |
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43 | List<Value> parameters = ((Function) function).parameters();
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44 | String p1 = parameters.get(0).toString(formatter); |
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45 | String r = MessageFormat.format("( ({0}) IS NULL )", p1); |
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46 | return r;
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47 | } |
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48 | |||
49 | } |