xzel23 commented on code in PR #184:
URL: https://github.com/apache/pdfbox/pull/184#discussion_r1484481434
##########
fontbox/src/main/java/org/apache/fontbox/ttf/GlyphSubstitutionTable.java:
##########
@@ -75,6 +76,13 @@ public class GlyphSubstitutionTable extends TTFTable
private GsubData gsubData;
+ /**
+ * The regex represents 4 'word characters' [a-zA-Z_0-9],
+ * see {@link java.util.regex.ASCII#WORD}<br>
+ * Note: the ' '-character is not matched!
+ */
+ static final Pattern wordPattern = Pattern.compile( "\\w{4}" );
Review Comment:
The name should be all uppercase for constants (static final). It should
also be private.
##########
fontbox/src/main/java/org/apache/fontbox/ttf/GlyphSubstitutionTable.java:
##########
@@ -75,6 +76,13 @@ public class GlyphSubstitutionTable extends TTFTable
private GsubData gsubData;
+ /**
+ * The regex represents 4 'word characters' [a-zA-Z_0-9],
+ * see {@link java.util.regex.ASCII#WORD}<br>
+ * Note: the ' '-character is not matched!
+ */
+ static final Pattern wordPattern = Pattern.compile( "\\w{4}" );
Review Comment:
What do you think about making this a predicate?
```
private static final Predicate<String> IS_FOUR_LETTERS =
Pattern.compile( "\\w{4}" ).asMatchPredicate();
```
Then the test would be `IS_FOUR_LETTERS.test(featureTags[i])`.
##########
fontbox/src/main/java/org/apache/fontbox/ttf/GlyphSubstitutionTable.java:
##########
@@ -799,10 +806,11 @@ public int getSubstitution(int gid, String[] scriptTags,
List<String> enabledFea
}
/**
- * For a substitute-gid (obtained from {@link #getSubstitution(int,
String[], List)}), retrieve the original gid.
- *
- * Only gids previously substituted by this instance can be
un-substituted. If you are trying to unsubstitute before
- * you substitute, something is wrong.
+ * For a substitute-gid (obtained from {@link #getSubstitution(int,
String[], List)}),
+ * retrieve the original gid.
+ * <br>
Review Comment:
Usually `<p>` is used in Javadoc to start a new paragraph.
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