### Question:
CorrelationProviderHelper { public static String temporaryReplace(String expressionString, String viewRoot, String temporaryViewRootMatchingName) { if (viewRoot == null) { return expressionString; } Matcher matcher = Pattern.compile("([" + NON_IDENTIFIER_CHARS + "\\(]|^)(" + Pattern.quote(viewRoot) + ")([" + NON_IDENTIFIER_CHARS + "\\)]|$)").matcher(expressionString); if (!matcher.find()) { return expressionString; } StringBuilder sb = new StringBuilder(expressionString.length()); sb.append(expressionString, 0, matcher.start()); int end = matcher.start(); do { sb.append(expressionString, end, matcher.start()); end = matcher.end(); sb.append(matcher.group(1)); sb.append(temporaryViewRootMatchingName); sb.append(matcher.group(3)); } while (matcher.find()); sb.append(expressionString, end, expressionString.length()); return sb.toString(); } private  CorrelationProviderHelper(); static String getDefaultCorrelationAlias(String attributePath); static String getDefaultExternalCorrelationAlias(String attributePath); @SuppressWarnings("unchecked") static CorrelationProviderFactory getFactory(Class<? extends CorrelationProvider> clazz); static String temporaryReplace(String expressionString, String viewRoot, String temporaryViewRootMatchingName); static final String TEMPORARY_VIEW_ROOT_MATCHING_NAME; static final String TEMPORARY_EMBEDDING_VIEW_MATCHING_NAME; }### Answer:
@Test public void replaceAlias() { assertEquals("id IN __WF", CorrelationProviderHelper.temporaryReplace("id IN correlationKey", "correlationKey", "__WF")); assertEquals("__WF IN __correlationAlias", CorrelationProviderHelper.temporaryReplace("workflow IN __correlationAlias", "workflow", "__WF")); assertEquals(" __WF IN __correlationAlias", CorrelationProviderHelper.temporaryReplace(" workflow IN __correlationAlias", "workflow", "__WF")); assertEquals("(__WF IN __correlationAlias)", CorrelationProviderHelper.temporaryReplace("(workflow IN __correlationAlias)", "workflow", "__WF")); assertEquals("s.workflow IN __correlationAlias", CorrelationProviderHelper.temporaryReplace("s.workflow IN __correlationAlias", "workflow", "__WF")); assertEquals("sworkflow IN __correlationAlias", CorrelationProviderHelper.temporaryReplace("sworkflow IN __correlationAlias", "workflow", "__WF")); assertEquals("workflows IN __correlationAlias", CorrelationProviderHelper.temporaryReplace("workflows IN __correlationAlias", "workflow", "__WF")); }