HostPatternSanitizer

```
public final class HostPatternSanitizer

                    
```
Utility class to validate wildcard host patterns.
A host pattern may contain at most one * wildcard and may only use the characters a-z, 0-9, ., - and *. A wildcard may only match subdomains of a registrable domain, so the * must be the last character of a subdomain label. Overly broad patterns (*, *.com, *.co.uk, *example.com) and mis-placed wildcards (*-preview.example.com) are rejected, while *.example.com, *.example.co.uk and preview-*.example.com are accepted.
This is the counterpart of HostsSanitizer for entries that are allowed to carry a wildcard, and it only enforces the wildcard rules above. Wildcard-free entries are merely character-checked, not fully validated as host names (blanks, bare TLDs such as com, etc. are returned as-is), so callers should route wildcard-free entries through HostsSanitizer for proper host-name validation.

Constructor Summary

Constructors
Constructor	Description
`HostPatternSanitizer(InternalLogger internalLogger)`

Method Summary

Modifier and Type	Method	Description
`final List<String>`	`validate(List<String> patterns, String feature)`	Validates the given host patterns, returning the valid ones in their original case and order (matching is case-insensitive, so the case is preserved for callers and normalized later).

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - HostPatternSanitizer
```
HostPatternSanitizer(InternalLogger internalLogger)
```
    Parameters:
    
    internalLogger - the logger used to report dropped patterns to the user.
- Method Detail
  - validate
```
 final List<String> validate(List<String> patterns, String feature)
```
    Validates the given host patterns, returning the valid ones in their original case and order (matching is case-insensitive, so the case is preserved for callers and normalized later). Entries containing characters outside [a-z0-9.*-], more than one * wildcard or an overly broad wildcard are dropped and an error is logged.
    
    Parameters:
    
    patterns - Host patterns to validate.
    
    feature - SDK feature requesting the validation.