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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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59
src/java/org/apache/poi/hssf/record/formula/eval/ConcatEval.java
View File

@ -17,47 +17,44 @@
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) {
if(args.length != 2) {
return ErrorEval.VALUE_INVALID;
}
StringBuffer sb = new StringBuffer();
try {
for (int i = 0; i < 2; i++) {
ValueEval ve = OperandResolver.getSingleValue(args[i], srcRow, srcCol);
if (ve instanceof StringValueEval) {
StringValueEval sve = (StringValueEval) ve;
sb.append(sve.getStringValue());
} else if (ve == BlankEval.INSTANCE) {
// do nothing
} else {
throw new RuntimeException("Unexpected value type ("
+ ve.getClass().getName() + ")");
}
public Eval evaluate(Eval[] args, int srcRow, short srcCol) {
if(args.length != 2) {
return ErrorEval.VALUE_INVALID;
}
StringBuffer sb = new StringBuffer();
try {
for (int i = 0; i < 2; i++) {
ValueEval ve = OperandResolver.getSingleValue(args[i], srcRow, srcCol);
if (ve instanceof StringValueEval) {
StringValueEval sve = (StringValueEval) ve;
sb.append(sve.getStringValue());
} else if (ve == BlankEval.INSTANCE) {
// do nothing
} else {
throw new RuntimeException("Unexpected value type ("
+ ve.getClass().getName() + ")");
}
}
} catch (EvaluationException e) {
return e.getErrorEval();
}
return new StringEval(sb.toString());
}
public int getNumberOfOperands() {
return delegate.getNumberOfOperands();
}
return new StringEval(sb.toString());
}
public int getNumberOfOperands() {
return 2;
}
}

6
src/java/org/apache/poi/ss/formula/OperationEvaluatorFactory.java
View File

@ -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);
@ -112,16 +113,13 @@ final class OperationEvaluatorFactory {
if (result != null) {
return result;
}
if (ptgClass == FuncPtg.class) {
return new FuncVarEval((FuncPtg)ptg);
}
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() + ")");
}
}