Skip to content

Fix NumberInput.looksLikeValidNumber() implementation #1241

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 6 commits into from
Mar 23, 2024
Merged

Fix NumberInput.looksLikeValidNumber() implementation #1241

Show file tree
Hide file tree
Changes from 2 commits
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
778d0bd
fix regression caused by looksLikeValidNumber
pjfanning Mar 16, 2024
610b83e
Update NumberInput.java
pjfanning Mar 17, 2024
31c9a83
Merge branch '2.17' into num-starting-dot
cowtowncoder Mar 23, 2024
eef1918
Minor cleanup pre-merge
cowtowncoder Mar 23, 2024
eaa3868
fix comment
cowtowncoder Mar 23, 2024
1c60872
warnings cleanup
cowtowncoder Mar 23, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 3 additions & 2 deletions src/main/java/com/fasterxml/jackson/core/io/NumberInput.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,7 @@ public final class NumberInput
* @since 2.17
*/
private final static Pattern PATTERN_FLOAT = Pattern.compile(
"[+-]?[0-9]+(\\.[0-9]+)?([eE][+-]?[0-9]+)?");
"[+-]?([0-9]+)?(\\.[0-9]+)?([eE][+-]?[0-9]+)?");

/**
* Fast method for parsing unsigned integers that are known to fit into
Expand Down Expand Up @@ -578,6 +578,7 @@ public static BigInteger parseBigIntegerWithRadix(final String s, final int radi
* @since 2.17
*/
public static boolean looksLikeValidNumber(final String s) {
return (s != null) && PATTERN_FLOAT.matcher(s).matches();
// the PATTERN_FLOAT match returns true for empty strings, so we need to check for digits separately
return s != null && PATTERN_FLOAT.matcher(s).matches() && s.chars().anyMatch(Character::isDigit);
}
}
6 changes: 6 additions & 0 deletions src/test/java/com/fasterxml/jackson/core/io/NumberInputTest.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -70,6 +70,11 @@ public void testLooksLikeValidNumber()
assertTrue(NumberInput.looksLikeValidNumber("-1"));
assertTrue(NumberInput.looksLikeValidNumber("0001")); // non-JSON

// https://github.com/FasterXML/jackson-databind/issues/4435
assertTrue(NumberInput.looksLikeValidNumber(".01"));
assertTrue(NumberInput.looksLikeValidNumber("+.01"));
assertTrue(NumberInput.looksLikeValidNumber("-.01"));

assertTrue(NumberInput.looksLikeValidNumber("0.01"));
assertTrue(NumberInput.looksLikeValidNumber("-0.10"));
assertTrue(NumberInput.looksLikeValidNumber("+0.25")); // non-JSON
Expand All @@ -84,6 +89,7 @@ public void testLooksLikeValidNumber()

assertFalse(NumberInput.looksLikeValidNumber(""));
assertFalse(NumberInput.looksLikeValidNumber(" "));
assertFalse(NumberInput.looksLikeValidNumber("."));
assertFalse(NumberInput.looksLikeValidNumber("10_000"));
}
}