@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 createCollectionIterationText(
@NotNull PsiForStatement forStatement)
throws IncorrectOperationException {
final PsiStatement body = forStatement.getBody();
final PsiStatement firstStatement = getFirstStatement(body);
final PsiStatement initialization =
forStatement.getInitialization();
if (!(initialization instanceof PsiDeclarationStatement)) {
return null;
}
final PsiDeclarationStatement declaration =
(PsiDeclarationStatement)initialization;
final PsiElement declaredIterator =
declaration.getDeclaredElements()[0];
if (!(declaredIterator instanceof PsiVariable)) {
return null;
}
final PsiVariable iteratorVariable = (PsiVariable)declaredIterator;
final PsiMethodCallExpression initializer =
(PsiMethodCallExpression)iteratorVariable.getInitializer();
if (initializer == null) {
return null;
}
final PsiType iteratorType = initializer.getType();
if (iteratorType == null) {
return null;
}
final PsiType iteratorContentType =
extractContentTypeFromType(iteratorType);
final PsiType iteratorVariableType = iteratorVariable.getType();
final PsiType contentType;
final PsiClassType javaLangObject = TypeUtils.getObjectType(forStatement);
if (iteratorContentType == null) {
final PsiType iteratorVariableContentType =
extractContentTypeFromType(iteratorVariableType);
if (iteratorVariableContentType == null) {
contentType = javaLangObject;
}
else {
contentType = iteratorVariableContentType;
}
}
else {
contentType = iteratorContentType;
}
final PsiReferenceExpression methodExpression =
initializer.getMethodExpression();
final PsiExpression collection =
methodExpression.getQualifierExpression();
final String iteratorName = iteratorVariable.getName();
final boolean isDeclaration =
isIteratorNextDeclaration(firstStatement, iteratorName,
contentType);
final PsiStatement statementToSkip;
@NonNls final String finalString;
final String contentVariableName;
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 {
if (collection instanceof PsiReferenceExpression) {
final PsiReferenceExpression referenceExpression =
(PsiReferenceExpression)collection;
final String collectionName =
referenceExpression.getReferenceName();
contentVariableName = createNewVariableName(forStatement,
contentType, collectionName);
}
else {
contentVariableName = createNewVariableName(forStatement,
contentType, null);
}
final Project project = forStatement.getProject();
final CodeStyleSettings codeStyleSettings =
CodeStyleSettingsManager.getSettings(project);
if (codeStyleSettings.GENERATE_FINAL_LOCALS) {
finalString = "final ";
}
else {
finalString = "";
}
statementToSkip = null;
}
final String contentTypeString = contentType.getCanonicalText();
@NonNls final StringBuilder out = new StringBuilder();
out.append("for(");
out.append(finalString);
out.append(contentTypeString);
out.append(' ');
out.append(contentVariableName);
out.append(": ");
if (!contentType.equals(javaLangObject)) {
@NonNls final String iterableTypeString =
"java.lang.Iterable<" + contentTypeString + '>';
if (iteratorContentType == null) {
out.append('(');
out.append(iterableTypeString);
out.append(')');
}
}
if (collection == null) {
out.append("this");
}
else {
out.append(collection.getText());
}
out.append(')');
replaceIteratorNext(body, contentVariableName, iteratorName,
statementToSkip, out, contentType);
return out.toString();
}