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Bug 66425: Avoid exceptions found via poi-fuzz 

Prevent ClassCastException

Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=63375

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1914990 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Dominik Stadler 2023-12-30 11:11:36 +00:00
parent 8e3b60f63d
commit 28811d26df
1 changed files with 5 additions and 1 deletions
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6
poi/src/main/java/org/apache/poi/ss/usermodel/FractionFormat.java
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@ -44,7 +44,7 @@ import org.apache.poi.ss.formula.eval.NotImplementedException;
@SuppressWarnings("serial")
public class FractionFormat extends Format {
private static final Logger LOGGER = LogManager.getLogger(FractionFormat.class);
private static final Pattern DENOM_FORMAT_PATTERN = Pattern.compile("(?:(#+)|(\\d+))");
private static final Pattern DENOM_FORMAT_PATTERN = Pattern.compile("(#+)|(\\d+)");
//this was chosen to match the earlier limitation of max denom power
//it can be expanded to get closer to Excel's calculations
@ -189,6 +189,10 @@ public class FractionFormat extends Format {
@Override
public StringBuffer format(Object obj, StringBuffer toAppendTo, FieldPosition pos) {
if (!(obj instanceof Number)) {
throw new IllegalArgumentException("Cannot format object of " + obj.getClass() + " to number: " + obj);
}
return toAppendTo.append(format((Number)obj));
}