question: public static String escapeXml ( String buffer ) { int start = 0 ; int length = buffer . length ( ) ; char [ ] arrayBuffer = buffer . toCharArray ( ) ; StringBuffer escapedBuffer = null ; for ( int i = 0 ; i < length ; i ++ ) { char c = arrayBuffer [ i ] ; if ( c <= HIGHEST_SPECIAL ) { char [ ] escaped = specialCharactersRepresentation [ c ] ; if ( escaped != null ) { if ( start == 0 ) { escapedBuffer = new StringBuffer ( length + 5 ) ; } if ( start < i ) { escapedBuffer . append ( arrayBuffer , start , i - start ) ; } start = i + 1 ; escapedBuffer . append ( escaped ) ; } } } if ( start == 0 ) { return buffer ; } if ( start < length ) { escapedBuffer . append ( arrayBuffer , start , length - start ) ; } return escapedBuffer . toString ( ) ; }
target:  Performs the following substring replacements (to facilitate output to XML/HTML pages): & -> &amp; < -> &lt; > -> &gt; " -> &#034; ' -> &#039; See also OutSupport.writeEscapedXml().