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fixed search term parser for empty terms

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This commit is contained in:
Daniel Gultsch 2018-04-30 17:37:39 +02:00
parent 27f31446c0
commit 438ae34988
1 changed files with 20 additions and 2 deletions
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22
src/main/java/eu/siacs/conversations/utils/FtsUtils.java
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@ -34,6 +34,7 @@ import java.util.Arrays;
import java.util.List;
import java.util.Locale;
public class FtsUtils {
private static List<String> KEYWORDS = Arrays.asList("OR", "AND");
@ -44,10 +45,10 @@ public class FtsUtils {
if (part.isEmpty()) {
continue;
}
final String cleaned = part.substring(getStartIndex(part), getEndIndex(part) +1);
final String cleaned = clean(part);
if (isKeyword(cleaned)) {
term.add(part);
} else {
} else if (!cleaned.isEmpty()) {
term.add(cleaned);
}
}
@ -76,9 +77,13 @@ public class FtsUtils {
}
private static int getStartIndex(String term) {
int length = term.length();
int index = 0;
while (term.charAt(index) == '*') {
++index;
if (index >= length) {
break;
}
}
return index;
}
@ -87,8 +92,21 @@ public class FtsUtils {
int index = term.length() - 1;
while (term.charAt(index) == '*') {
--index;
if (index < 0) {
break;
}
}
return index;
}
private static String clean(String input) {
int begin = getStartIndex(input);
int end = getEndIndex(input);
if (begin > end) {
return "";
} else {
return input.substring(begin, end + 1);
}
}
}