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 / IsNull.java @ 47456
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package org.gvsig.fmap.dal.store.jdbc2.spi.expressionbuilder.formatters; |
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import java.text.MessageFormat; |
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import java.util.List; |
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import org.apache.commons.lang3.StringUtils; |
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import org.gvsig.expressionevaluator.Code.Constant; |
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import org.gvsig.expressionevaluator.ExpressionBuilder.Function; |
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import static org.gvsig.expressionevaluator.ExpressionBuilder.OPERATOR_IS; |
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import org.gvsig.expressionevaluator.ExpressionBuilder.Value; |
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import org.gvsig.expressionevaluator.Formatter; |
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import org.gvsig.fmap.dal.SQLBuilder; |
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/**
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*
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* @author jjdelcerro
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*/
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public class IsNull implements Formatter<Value> { |
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private final Formatter<Value> formatter; |
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private final SQLBuilder builder; |
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public IsNull(SQLBuilder builder, Formatter<Value> formatter) { |
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this.builder = builder;
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this.formatter = formatter;
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} |
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@Override
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public boolean canApply(Value value) { |
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if (value instanceof Function) { |
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if( StringUtils.equalsIgnoreCase(OPERATOR_IS, ((Function) value).name()) ) {
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List<Value> parameters = ((Function) value).parameters();
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Value p2 = parameters.get(1);
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if( p2 instanceof Constant && ((Constant)p2).value()==null ) { |
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return true; |
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} |
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} |
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} |
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return false; |
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} |
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@Override
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public String format(Value function) { |
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List<Value> parameters = ((Function) function).parameters();
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String p1 = parameters.get(0).toString(formatter); |
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String r = MessageFormat.format("( ({0}) IS NULL )", p1); |
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return r;
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} |
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} |