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henrib pushed a commit to branch master
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The following commit(s) were added to refs/heads/master by this push:
new 8afe559 [JEXL]: - preparing to add 'escaped' identifiers
8afe559 is described below
commit 8afe5595058c727b64b10decaa49bb5a72acc977
Author: henrib <>
AuthorDate: Wed May 16 10:40:19 2018 +0200
[JEXL]:
- preparing to add 'escaped' identifiers
---
.../apache/commons/jexl3/parser/StringParser.java | 67 ++++++++++++++++++++++
1 file changed, 67 insertions(+)
diff --git a/src/main/java/org/apache/commons/jexl3/parser/StringParser.java
b/src/main/java/org/apache/commons/jexl3/parser/StringParser.java
index 8cb4b9d..375c1dd 100644
--- a/src/main/java/org/apache/commons/jexl3/parser/StringParser.java
+++ b/src/main/java/org/apache/commons/jexl3/parser/StringParser.java
@@ -205,5 +205,72 @@ public class StringParser {
strb.append(delim);
return strb.toString();
}
+
+ /**
+ * Remove escape char ('\') from an identifier.
+ * @param str the identifier escaped string, ie with a backslash before
space, quote, double-quote and backslash
+ * @return the string with no '\\' character
+ */
+ public static String unescapeIdentifier(String str) {
+ StringBuilder strb = null;
+ boolean esc = false;
+ if (str != null) {
+ int n = 0;
+ int last = str.length();
+ while (n < last) {
+ char c = str.charAt(n);
+ if (esc) {
+ if (strb == null) {
+ strb = new StringBuilder(last);
+ strb.append(str.substring(0, n));
+ } else {
+ strb.append(c);
+ }
+ esc = false;
+ } else if (c == '\\') {
+ esc = true;
+ } else if (strb != null) {
+ strb.append(c);
+ }
+ n += 1;
+ }
+ }
+ return strb == null ? str : strb.toString();
+ }
+ /**
+ * Adds a escape char ('\') where needed in a string form of an ide
+ * @param str the identifier un-escaped string
+ * @return the string with added backslash character before space, quote,
double-quote and backslash
+ */
+ public static String escapeIdentifier(String str) {
+ StringBuilder strb = null;
+ if (str != null) {
+ int n = 0;
+ int last = str.length();
+ while (n < last) {
+ char c = str.charAt(n);
+ switch (c) {
+ case ' ':
+ case '\'':
+ case '"':
+ case '\\': {
+ if (strb == null) {
+ strb = new StringBuilder(last);
+ strb.append(str.substring(0, n));
+ }
+ strb.append('\\');
+ strb.append(c);
+ break;
+ }
+ default:
+ if (strb != null) {
+ strb.append(c);
+ }
+ }
+ n += 1;
+ }
+ }
+ return strb == null ? str : strb.toString();
+ }
}
\ No newline at end of file
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