HADOOP-6657. Add a capitalization method to StringUtils for MAPREDUCE-1545
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@934619 13f79535-47bb-0310-9956-ffa450edef68
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@ -69,6 +69,9 @@ Trunk (unreleased changes)
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for RPC (boryas)
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HADOOP-6580. UGI should contain authentication method. (jnp via boryas)
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HADOOP-6657. Add a capitalization method to StringUtils for MAPREDUCE-1545.
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(Luke Lu via Steve Loughran)
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IMPROVEMENTS
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@ -720,4 +720,20 @@ public static String join(CharSequence separator, Iterable<String> strings) {
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}
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return sb.toString();
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}
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/**
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* Convert SOME_STUFF to SomeStuff
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*
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* @param s input string
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* @return camelized string
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*/
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public static String camelize(String s) {
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StringBuilder sb = new StringBuilder();
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String[] words = split(s.toLowerCase(Locale.US), ESCAPE_CHAR, '_');
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for (String word : words)
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sb.append(org.apache.commons.lang.StringUtils.capitalize(word));
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return sb.toString();
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}
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}
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@ -153,4 +153,39 @@ public void testGetTrimmedStrings() throws Exception {
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assertArrayEquals(emptyArray, StringUtils.getTrimmedStrings(emptyList1));
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assertArrayEquals(emptyArray, StringUtils.getTrimmedStrings(emptyList2));
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}
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public void testCamelize() {
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// common use cases
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assertEquals("Map", StringUtils.camelize("MAP"));
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assertEquals("JobSetup", StringUtils.camelize("JOB_SETUP"));
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assertEquals("SomeStuff", StringUtils.camelize("some_stuff"));
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// sanity checks for ascii alphabet against unexpected locale issues.
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assertEquals("Aa", StringUtils.camelize("aA"));
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assertEquals("Bb", StringUtils.camelize("bB"));
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assertEquals("Cc", StringUtils.camelize("cC"));
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assertEquals("Dd", StringUtils.camelize("dD"));
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assertEquals("Ee", StringUtils.camelize("eE"));
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assertEquals("Ff", StringUtils.camelize("fF"));
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assertEquals("Gg", StringUtils.camelize("gG"));
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assertEquals("Hh", StringUtils.camelize("hH"));
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assertEquals("Ii", StringUtils.camelize("iI"));
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assertEquals("Jj", StringUtils.camelize("jJ"));
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assertEquals("Kk", StringUtils.camelize("kK"));
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assertEquals("Ll", StringUtils.camelize("lL"));
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assertEquals("Mm", StringUtils.camelize("mM"));
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assertEquals("Nn", StringUtils.camelize("nN"));
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assertEquals("Oo", StringUtils.camelize("oO"));
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assertEquals("Pp", StringUtils.camelize("pP"));
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assertEquals("Qq", StringUtils.camelize("qQ"));
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assertEquals("Rr", StringUtils.camelize("rR"));
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assertEquals("Ss", StringUtils.camelize("sS"));
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assertEquals("Tt", StringUtils.camelize("tT"));
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assertEquals("Uu", StringUtils.camelize("uU"));
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assertEquals("Vv", StringUtils.camelize("vV"));
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assertEquals("Ww", StringUtils.camelize("wW"));
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assertEquals("Xx", StringUtils.camelize("xX"));
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assertEquals("Yy", StringUtils.camelize("yY"));
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assertEquals("Zz", StringUtils.camelize("zZ"));
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}
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}
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