private void processUsagesPerFile(UsageInfo[] usages) { Map<PsiFile, List<EncapsulateFieldUsageInfo>> usagesInFiles = new HashMap<PsiFile, List<EncapsulateFieldUsageInfo>>(); for (UsageInfo usage : usages) { PsiElement element = usage.getElement(); if (element == null) continue; final PsiFile file = element.getContainingFile(); List<EncapsulateFieldUsageInfo> usagesInFile = usagesInFiles.get(file); if (usagesInFile == null) { usagesInFile = new ArrayList<EncapsulateFieldUsageInfo>(); usagesInFiles.put(file, usagesInFile); } usagesInFile.add(((EncapsulateFieldUsageInfo) usage)); } for (List<EncapsulateFieldUsageInfo> usageInfos : usagesInFiles.values()) { // this is to avoid elements to become invalid as a result of processUsage final EncapsulateFieldUsageInfo[] infos = usageInfos.toArray(new EncapsulateFieldUsageInfo[usageInfos.size()]); CommonRefactoringUtil.sortDepthFirstRightLeftOrder(infos); for (EncapsulateFieldUsageInfo info : infos) { EncapsulateFieldHelper helper = EncapsulateFieldHelper.getHelper(info.getElement().getLanguage()); helper.processUsage( info, myDescriptor, myNameToSetter.get(info.getFieldDescriptor().getSetterName()), myNameToGetter.get(info.getFieldDescriptor().getGetterName())); } } }