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Code Issues Releases Wiki Activity

Improve StringUtils.escapeForXML()

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use CharSequence as input.
This commit is contained in:
Florian Schmaus 2015-07-01 23:21:53 +02:00
parent 1c716bc1e0
commit 46f9b9ab39
1 changed files with 9 additions and 10 deletions
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19
smack-core/src/main/java/org/jivesoftware/smack/util/StringUtils.java
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@ -41,18 +41,17 @@ public class StringUtils {
public static final char[] HEX_CHARS = "0123456789abcdef".toCharArray(); public static final char[] HEX_CHARS = "0123456789abcdef".toCharArray();
/** /**
* Escapes all necessary characters in the String so that it can be used * Escapes all necessary characters in the CharSequence so that it can be used
* in an XML doc. * in an XML doc.
* *
* @param string the string to escape. * @param input the CharSequence to escape.
* @return the string with appropriate characters escaped. * @return the string with appropriate characters escaped.
*/ */
public static CharSequence escapeForXML(final String string) { public static CharSequence escapeForXML(final CharSequence input) {
if (string == null) { if (input == null) {
return null; return null;
} }
final char[] input = string.toCharArray(); final int len = input.length();
final int len = input.length;
final StringBuilder out = new StringBuilder((int)(len*1.3)); final StringBuilder out = new StringBuilder((int)(len*1.3));
CharSequence toAppend; CharSequence toAppend;
char ch; char ch;
@ -60,7 +59,7 @@ public class StringUtils {
int i = 0; int i = 0;
while (i < len) { while (i < len) {
toAppend = null; toAppend = null;
ch = input[i]; ch = input.charAt(i);
switch(ch) { switch(ch) {
case '<': case '<':
toAppend = LT_ENCODE; toAppend = LT_ENCODE;
@ -82,7 +81,7 @@ public class StringUtils {
} }
if (toAppend != null) { if (toAppend != null) {
if (i > last) { if (i > last) {
out.append(input, last, i - last); out.append(input, last, i);
} }
out.append(toAppend); out.append(toAppend);
last = ++i; last = ++i;
@ -91,10 +90,10 @@ public class StringUtils {
} }
} }
if (last == 0) { if (last == 0) {
return string; return input;
} }
if (i > last) { if (i > last) {
out.append(input, last, i - last); out.append(input, last, i);
} }
return out; return out;
} }