Tatu Saloranta | fd5ca3b | 2016-05-28 20:17:14 -0700 | [diff] [blame] | 1 | package com.fasterxml.jackson.core; |
| 2 | |
| 3 | import com.fasterxml.jackson.core.io.CharacterEscapes; |
| 4 | import com.fasterxml.jackson.core.io.SerializedString; |
| 5 | |
| 6 | /** |
| 7 | * Convenience {@link CharacterEscapes} implementation that escapes |
| 8 | * Unicode characters `0x2028` and `0x2029` (in addition to characters |
| 9 | * escaped otherwise), which are apparently considered linefeeds as |
| 10 | * per newer Javascript specifications, and consequently problematic |
| 11 | * when using JSONP (see https://en.wikipedia.org/wiki/JSONP). |
| 12 | * |
| 13 | * @since 2.8 |
| 14 | */ |
| 15 | public class JsonpCharacterEscapes extends CharacterEscapes |
| 16 | { |
| 17 | private static final long serialVersionUID = 1L; |
| 18 | |
| 19 | private static final int[] asciiEscapes = CharacterEscapes.standardAsciiEscapesForJSON(); |
| 20 | private static final SerializedString escapeFor2028 = new SerializedString("\\u2028"); |
| 21 | private static final SerializedString escapeFor2029 = new SerializedString("\\u2029"); |
| 22 | |
| 23 | private static final JsonpCharacterEscapes sInstance = new JsonpCharacterEscapes(); |
| 24 | |
| 25 | public static JsonpCharacterEscapes instance() { |
| 26 | return sInstance; |
| 27 | } |
| 28 | |
| 29 | @Override |
| 30 | public SerializableString getEscapeSequence(int ch) |
| 31 | { |
| 32 | switch (ch) { |
| 33 | case 0x2028: |
| 34 | return escapeFor2028; |
| 35 | case 0x2029: |
| 36 | return escapeFor2029; |
| 37 | default: |
| 38 | return null; |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | @Override |
| 43 | public int[] getEscapeCodesForAscii() { |
| 44 | return asciiEscapes; |
| 45 | } |
| 46 | } |