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splitting into words without excessive object creation

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This commit is contained in:
peter
2011-03-31 19:57:47 +02:00
parent 08c2174385
commit dfcbc87d60
1 changed files with 11 additions and 29 deletions
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platform/util/src/com/intellij/psi/codeStyle/NameUtil.java
+11 -29
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@@ -31,8 +31,6 @@ import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
@@ -325,61 +323,45 @@ public class NameUtil {
return Character.isUpperCase(p) || Character.isDigit(p);
}
private static void addAllWords(String word, List<String> result) {
CharacterIterator it = new StringCharacterIterator(word);
StringBuffer b = new StringBuffer();
private static void addAllWords(String text, List<String> result) {
int start = 0;
WordState state = WordState.NO_WORD;
char curPrevUC = '\0';
for (char c = it.first(); c != CharacterIterator.DONE; c = it.next()) {
for (int i = 0; i < text.length(); i++) {
char c = text.charAt(i);
switch (state) {
case NO_WORD:
if (!isWordStart(c)) {
b.append(c);
state = WordState.WORD;
}
else {
state = WordState.PREV_UC;
curPrevUC = c;
}
break;
case PREV_UC:
if (!isWordStart(c)) {
b = startNewWord(result, b, curPrevUC);
b.append(c);
start = startNewWord(text, result, start, i - 1);
state = WordState.WORD;
}
else {
b.append(curPrevUC);
state = WordState.PREV_UC;
curPrevUC = c;
}
break;
case WORD:
if (isWordStart(c)) {
startNewWord(result, b, c);
b.setLength(0);
start = startNewWord(text, result, start, i);
state = WordState.PREV_UC;
curPrevUC = c;
}
else {
b.append(c);
}
break;
}
}
if (state == WordState.PREV_UC) {
b.append(curPrevUC);
}
result.add(b.toString());
startNewWord(text, result, start, text.length());
}
private static StringBuffer startNewWord(List<String> result, StringBuffer b, char c) {
if (b.length() > 0) {
result.add(b.toString());
private static int startNewWord(String word, List<String> result, int start, int end) {
if (end > start) {
result.add(word.substring(start, end));
}
b = new StringBuffer();
b.append(c);
return b;
return end;
}
public interface Matcher {