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Converted ConcatEval to singleton

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git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@797238 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Josh Micich 2009-07-23 21:45:56 +00:00
parent 15e434d684
commit e6d41ed590
2 changed files with 30 additions and 35 deletions
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11
src/java/org/apache/poi/hssf/record/formula/eval/ConcatEval.java
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@ -17,18 +17,15 @@
package org.apache.poi.hssf.record.formula.eval;
import org.apache.poi.hssf.record.formula.ConcatPtg;
/**
* @author Amol S. Deshmukh < amolweb at ya hoo dot com >
*
*/
public final class ConcatEval implements OperationEval {
private ConcatPtg delegate;
public static final OperationEval instance = new ConcatEval();
public ConcatEval(ConcatPtg ptg) {
delegate = ptg;
private ConcatEval() {
// enforce singleton
}
public Eval evaluate(Eval[] args, int srcRow, short srcCol) {
@ -58,6 +55,6 @@ public final class ConcatEval implements OperationEval {
}
public int getNumberOfOperands() {
return delegate.getNumberOfOperands();
return 2;
}
}

4
src/java/org/apache/poi/ss/formula/OperationEvaluatorFactory.java
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@ -84,6 +84,7 @@ final class OperationEvaluatorFactory {
m.put(LessThanPtg.class, LessThanEval.instance);
m.put(NotEqualPtg.class, NotEqualEval.instance);
m.put(ConcatPtg.class, ConcatEval.instance);
m.put(AddPtg.class, AddEval.instance);
m.put(DividePtg.class, DivideEval.instance);
m.put(MultiplyPtg.class, MultiplyEval.instance);
@ -119,9 +120,6 @@ final class OperationEvaluatorFactory {
if (ptgClass == FuncVarPtg.class) {
return new FuncVarEval((FuncVarPtg)ptg);
}
if (ptgClass == ConcatPtg.class) {
return new ConcatEval((ConcatPtg)ptg);
}
throw new RuntimeException("Unexpected operation ptg class (" + ptgClass.getName() + ")");
}
}