[LANG-858] StringEscapeUtils.escapeJava() and escapeEcmaScript() do not output the escaped surrogate pairs that are Java parsable

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 3.2
• Component/s: lang.*, lang.text.translate.*
• Labels: escaping
• Assignee: Unassigned
• Reporter: Kazuki Hamasaki
• Created: 21/Nov/12 14:40
• Updated: 21/Oct/13 05:46
• Resolved: 24/Nov/12 01:57

Description

In case of Java and ECMA Script, the style of unicode escape '\uxxxxxx' cannot be accepted. We need to separate it into high-surrogate and low-surrogate.

For example, you put the surrogate pair

'\uDBFF\uDFFD'

output must be

"\\uDBFF\\uDFFD"

However you get

"\\u10FFFD"

Test case here:

@Test
public void testEscapeSurrogatePairs() throws Exception {
    assertEquals("\\uDBFF\\uDFFD", StringEscapeUtils.escapeJava("\uDBFF\uDFFD"));
    assertEquals("\\uDBFF\\uDFFD", StringEscapeUtils.escapeEcmaScript("\uDBFF\uDFFD"));
}

I attached the patch which implements simple solution.
But UnicodeEscaper.java should not be specified for Java, I think. We need to discuss about it.

This issue does not be appeared in unescape method.