@Nullable
private String createArrayIterationText(@NotNull PsiForStatement forStatement) {
final PsiExpression condition = forStatement.getCondition();
final PsiBinaryExpression strippedCondition = (PsiBinaryExpression)ParenthesesUtils.stripParentheses(condition);
if (strippedCondition == null) {
return null;
}
final PsiExpression lhs = ParenthesesUtils.stripParentheses(strippedCondition.getLOperand());
if (lhs == null) {
return null;
}
final PsiExpression rhs = ParenthesesUtils.stripParentheses(strippedCondition.getROperand());
if (rhs == null) {
return null;
}
final IElementType tokenType = strippedCondition.getOperationTokenType();
final PsiReferenceExpression arrayLengthExpression;
final String indexName;
if (tokenType.equals(JavaTokenType.LT)) {
arrayLengthExpression = (PsiReferenceExpression)ParenthesesUtils.stripParentheses(rhs);
indexName = lhs.getText();
}
else if (tokenType.equals(JavaTokenType.GT)) {
arrayLengthExpression = (PsiReferenceExpression)ParenthesesUtils.stripParentheses(lhs);
indexName = rhs.getText();
}
else {
return null;
}
if (arrayLengthExpression == null) {
return null;
}
PsiReferenceExpression arrayReference = (PsiReferenceExpression)arrayLengthExpression.getQualifierExpression();
if (arrayReference == null) {
final PsiElement target = arrayLengthExpression.resolve();
if (!(target instanceof PsiVariable)) {
return null;
}
final PsiVariable variable = (PsiVariable)target;
final PsiExpression initializer = variable.getInitializer();
if (!(initializer instanceof PsiReferenceExpression)) {
return null;
}
final PsiReferenceExpression referenceExpression = (PsiReferenceExpression)initializer;
arrayReference = (PsiReferenceExpression)referenceExpression.getQualifierExpression();
if (arrayReference == null) {
return null;
}
}
final PsiArrayType arrayType = (PsiArrayType)arrayReference.getType();
if (arrayType == null) {
return null;
}
final PsiType componentType = arrayType.getComponentType();
final String typeText = componentType.getCanonicalText();
final PsiElement target = arrayReference.resolve();
if (!(target instanceof PsiVariable)) {
return null;
}
final PsiVariable arrayVariable = (PsiVariable)target;
final PsiStatement body = forStatement.getBody();
final PsiStatement firstStatement = getFirstStatement(body);
final boolean isDeclaration = isArrayElementDeclaration(firstStatement, arrayVariable, indexName);
final String contentVariableName;
@NonNls final String finalString;
final PsiStatement statementToSkip;
if (isDeclaration) {
final PsiDeclarationStatement declarationStatement = (PsiDeclarationStatement)firstStatement;
assert declarationStatement != null;
final PsiElement[] declaredElements = declarationStatement.getDeclaredElements();
final PsiElement declaredElement = declaredElements[0];
if (!(declaredElement instanceof PsiVariable)) {
return null;
}
final PsiVariable variable = (PsiVariable)declaredElement;
if (VariableAccessUtils.variableIsAssigned(variable, forStatement)) {
final String collectionName = arrayReference.getReferenceName();
contentVariableName = createNewVariableName(forStatement, componentType, collectionName);
final Project project = forStatement.getProject();
final CodeStyleSettings codeStyleSettings = CodeStyleSettingsManager.getSettings(project);
if (codeStyleSettings.GENERATE_FINAL_LOCALS) {
finalString = "final ";
}
else {
finalString = "";
}
statementToSkip = null;
}
else {
contentVariableName = variable.getName();
statementToSkip = declarationStatement;
if (variable.hasModifierProperty(PsiModifier.FINAL)) {
finalString = "final ";
}
else {
finalString = "";
}
}
}
else {
final String collectionName = arrayReference.getReferenceName();
contentVariableName = createNewVariableName(forStatement, componentType, collectionName);
final Project project = forStatement.getProject();
final CodeStyleSettings codeStyleSettings = CodeStyleSettingsManager.getSettings(project);
if (codeStyleSettings.GENERATE_FINAL_LOCALS) {
finalString = "final ";
}
else {
finalString = "";
}
statementToSkip = null;
}
@NonNls final StringBuilder out = new StringBuilder();
out.append("for(");
out.append(finalString);
out.append(typeText);
out.append(' ');
out.append(contentVariableName);
out.append(": ");
final String arrayName = arrayReference.getText();
out.append(arrayName);
out.append(')');
if (body != null) {
replaceArrayAccess(body, contentVariableName, arrayVariable, indexName, statementToSkip, out);
}
return out.toString();
}
@Nullable
private String createListIterationText(
@NotNull PsiForStatement forStatement) {
final PsiBinaryExpression condition =
(PsiBinaryExpression)ParenthesesUtils.stripParentheses(
forStatement.getCondition());
if (condition == null) {
return null;
}
final PsiExpression lhs = ParenthesesUtils.stripParentheses(condition.getLOperand());
if (lhs == null) {
return null;
}
final PsiExpression rhs = ParenthesesUtils.stripParentheses(condition.getROperand());
if (rhs == null) {
return null;
}
final IElementType tokenType = condition.getOperationTokenType();
final String indexName;
PsiExpression collectionSize;
if (JavaTokenType.LT.equals(tokenType)) {
indexName = lhs.getText();
collectionSize = rhs;
}
else if (JavaTokenType.GT.equals(tokenType)) {
indexName = rhs.getText();
collectionSize = lhs;
}
else {
return null;
}
if (collectionSize instanceof PsiReferenceExpression) {
final PsiReferenceExpression referenceExpression = (PsiReferenceExpression)collectionSize;
final PsiElement target = referenceExpression.resolve();
if (target instanceof PsiVariable) {
final PsiVariable variable = (PsiVariable)target;
collectionSize = ParenthesesUtils.stripParentheses(variable.getInitializer());
}
}
if (!(collectionSize instanceof PsiMethodCallExpression)) {
return null;
}
final PsiMethodCallExpression methodCallExpression = (PsiMethodCallExpression)ParenthesesUtils.stripParentheses(collectionSize);
if (methodCallExpression == null) {
return null;
}
final PsiReferenceExpression listLengthExpression = methodCallExpression.getMethodExpression();
final PsiExpression qualifier = listLengthExpression.getQualifierExpression();
final PsiReferenceExpression listReference;
if (qualifier instanceof PsiReferenceExpression) {
listReference = (PsiReferenceExpression)qualifier;
}
else {
listReference = null;
}
PsiType parameterType;
if (listReference == null) {
parameterType = extractListTypeFromContainingClass(forStatement);
}
else {
final PsiType type = listReference.getType();
if (type == null) {
return null;
}
parameterType = extractContentTypeFromType(type);
}
if (parameterType == null) {
parameterType = TypeUtils.getObjectType(forStatement);
}
final String typeString = parameterType.getCanonicalText();
final PsiVariable listVariable;
if (listReference == null) {
listVariable = null;
}
else {
final PsiElement target = listReference.resolve();
if (!(target instanceof PsiVariable)) {
return null;
}
listVariable = (PsiVariable)target;
}
final PsiStatement body = forStatement.getBody();
final PsiStatement firstStatement = getFirstStatement(body);
final boolean isDeclaration = isListElementDeclaration(firstStatement, listVariable, indexName, parameterType);
final String contentVariableName;
@NonNls final String finalString;
final PsiStatement statementToSkip;
if (isDeclaration) {
final PsiDeclarationStatement declarationStatement = (PsiDeclarationStatement)firstStatement;
assert declarationStatement != null;
final PsiElement[] declaredElements = declarationStatement.getDeclaredElements();
final PsiElement declaredElement = declaredElements[0];
if (!(declaredElement instanceof PsiVariable)) {
return null;
}
final PsiVariable variable = (PsiVariable)declaredElement;
contentVariableName = variable.getName();
statementToSkip = declarationStatement;
if (variable.hasModifierProperty(PsiModifier.FINAL)) {
finalString = "final ";
}
else {
finalString = "";
}
}
else {
final String collectionName;
if (listReference == null) {
collectionName = null;
}
else {
collectionName = listReference.getReferenceName();
}
contentVariableName = createNewVariableName(forStatement, parameterType, collectionName);
finalString = "";
statementToSkip = null;
}
@NonNls final StringBuilder out = new StringBuilder();
out.append("for(");
out.append(finalString);
out.append(typeString);
out.append(' ');
out.append(contentVariableName);
out.append(": ");
@NonNls final String listName;
if (listReference == null) {
listName = "this";
}
else {
listName = listReference.getText();
}
out.append(listName);
out.append(')');
if (body != null) {
replaceCollectionGetAccess(body, contentVariableName, listVariable, indexName, statementToSkip, out);
}
return out.toString();
}