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Refactor, fix and optimize the character replacement function
<pre class='prettyprint' language='java'>package engine; import junit.framework.Assert; import junit.framework.TestCase; public class StringFunctionsTest extends TestCase { public void testEscapeXMLSimple(){ final String simple = "<xml><SvcRsData>a<![CDATA[<sender>John & Smith</sender>]]></SvcRsData></xml> "; final String expected = "<xml><SvcRsData>a&#60;sender&#62;John &#38; Smith&#60;/sender&#62;</SvcRsData></xml> "; String result = StringFunctions.escapeXML(simple); Assert.assertTrue(result.equals(expected)); } public void testEscapeXMLCDATAInsideCDATA(){ final String stringWithCDATAInsideCDATA = "<xml><SvcRsData>a<![CDATA[<sender>John <![CDATA[Inner & CD ]]>& Smith</sender>]]></SvcRsData></xml> "; final String expected = "<xml><SvcRsData>a&#60;sender&#62;John &#60;![CDATA[Inner &#38; CD & Smith</sender>]]></SvcRsData></xml> "; String result = StringFunctions.escapeXML(stringWithCDATAInsideCDATA); Assert.assertTrue(result.equals(expected)); } public void testEscapeXMLCDATAWithoutClosingTag(){ final String stringWithCDATAWithoutClosingTag = "<xml><SvcRsData>a<![CDATA[<sender>John & Smith</sender></SvcRsData></xml> "; try{ String result = StringFunctions.escapeXML(stringWithCDATAWithoutClosingTag); }catch(StringIndexOutOfBoundsException exception){ Assert.assertNotNull(exception); } } public void testEscapeXMLCDATAWithTwoCDATAClosingTags(){ final String stringWithCDATAWithTwoClosingTags = "<xml><SvcRsData>a<![CDATA[<sender>John Inner & CD ]]>& Smith</sender>]]>bcd & efg</SvcRsData></xml> "; final String expectedAfterSecondClosingTagNotEscaped = "<xml><SvcRsData>a&#60;sender&#62;John Inner &#38; CD & Smith</sender>]]>bcd & efg</SvcRsData></xml> "; String result = StringFunctions.escapeXML(stringWithCDATAWithTwoClosingTags); Assert.assertTrue(result.equals(expectedAfterSecondClosingTagNotEscaped)); } public void testEscapeXMLSimpleTwoCDATA(){ final String stringWithTwoCDATA = "<xml><SvcRsData>a<![CDATA[<sender>John & Smith</sender>]]>abc<sometag>xyz</sometag><sometag2><![CDATA[<recipient>Gorge & Doe</recipient>]]></sometag2></SvcRsData></xml> "; final String expected = "<xml><SvcRsData>a&#60;sender&#62;John &#38; Smith&#60;/sender&#62;abc<sometag>xyz</sometag><sometag2>&#60;recipient&#62;Gorge &#38; Doe&#60;/recipient&#62;</sometag2></SvcRsData></xml> "; String result = StringFunctions.escapeXML(stringWithTwoCDATA); Assert.assertTrue(result.equals(expected)); } public void testEscapeXMLOverlappingCDATA(){ final String stringWithTwoCDATA = "<xml><SvcRsData>a<![CDATA[<sender>John & <![CDATA[Smith</sender>]]>abc<sometag>xyz</sometag><sometag2><recipient>Gorge & Doe</recipient>]]></sometag2></SvcRsData></xml> "; final String expectedMess = "<xml><SvcRsData>a&#60;sender&#62;John &#38; &#60;![CDATA[Smith&#60;/sender&#62;abc<sometag>xyz</sometag><sometag2><recipient>Gorge & Doe</recipient>]]></sometag2></SvcRsData></xml> "; String result = StringFunctions.escapeXML(stringWithTwoCDATA); Assert.assertTrue(result.equals(expectedMess)); } } package engine; public class StringFunctions { public static String escapeXML(String s) { StringBuffer result = new StringBuffer(); int stringSize = 0; int posIniData = 0, posFinData = 0, posIniCData = 0, posFinCData = 0; String stringPreData = "", stringRsData = "", stringPosData = "", stringCData = "", stringPreCData = "", stringTempRsData = ""; String stringNewRsData = "", stringPosCData = "", stringNewCData = ""; short caracter; stringSize = s.length(); posIniData = s.indexOf("<SvcRsData>"); if (posIniData > 0) { posIniData = posIniData + 11; posFinData = s.indexOf("</SvcRsData>"); stringPreData = s.substring(0, posIniData); stringRsData = s.substring(posIniData, posFinData); stringPosData = s.substring(posFinData, stringSize); stringTempRsData = stringRsData; posIniCData = stringRsData.indexOf("<![CDATA["); if (posIniCData > 0) { while (posIniCData > 0) { posIniCData = posIniCData + 9; posFinCData = stringTempRsData.indexOf("]]>"); stringPreCData = stringTempRsData.substring(0, posIniCData - 9); stringCData = stringTempRsData.substring(posIniCData, posFinCData); stringPosCData = stringTempRsData.substring( posFinCData + 3, stringTempRsData.length()); stringNewCData = replaceCharacter(stringCData); stringTempRsData = stringTempRsData.substring( posFinCData + 3, stringTempRsData.length()); stringNewRsData = stringNewRsData + stringPreCData + stringNewCData; posIniCData = stringTempRsData.indexOf("<![CDATA["); } } else { stringNewRsData = stringRsData; } stringNewRsData = stringNewRsData + stringPosCData; s = stringPreData + stringNewRsData + stringPosData; stringSize = s.length(); } for (int i = 0; i < stringSize; i++) { caracter = (short) s.charAt(i); if (caracter > 128) { result.append("&#"); result.append(caracter); result.append(';'); } else { result.append((char) caracter); } } return result.toString(); } private static String replaceCharacter(String s) { StringBuffer result = new StringBuffer(); int stringSize = s.length(); short caracter; for (int i = 0; i < stringSize; i++) { caracter = (short) s.charAt(i); if (caracter > 128 || caracter == 34 || caracter == 38 || caracter == 60 || caracter == 62) { result.append("&#"); result.append(caracter); result.append(';'); } else { result.append((char) caracter); } } return result.toString(); } }</pre> <a href="http://www.refactormycode.com/codes/833-refactor-fix-and-optimize-the-character-replacement-function" style="color:#fff" title="As seen on RefactorMyCode.com"><img alt="Small_logo" src="http://www.refactormycode.com/images/small_logo.gif" style="border:0" /></a>