private boolean isListGetLookup(PsiElement element,
String indexName,
PsiVariable listVariable) {
if (!(element instanceof PsiExpression)) {
return false;
}
final PsiExpression expression = (PsiExpression)element;
if (!expressionIsListGetLookup(expression)) {
return false;
}
final PsiMethodCallExpression methodCallExpression =
(PsiMethodCallExpression)
ParenthesesUtils.stripParentheses(expression);
if (methodCallExpression == null) {
return false;
}
final PsiReferenceExpression methodExpression =
methodCallExpression.getMethodExpression();
final PsiExpression qualifierExpression =
methodExpression.getQualifierExpression();
final PsiExpressionList argumentList =
methodCallExpression.getArgumentList();
final PsiExpression[] expressions = argumentList.getExpressions();
if (expressions.length != 1) {
return false;
}
if (!indexName.equals(expressions[0].getText())) {
return false;
}
if (qualifierExpression == null ||
qualifierExpression instanceof PsiThisExpression ||
qualifierExpression instanceof PsiSuperExpression) {
return listVariable == null;
}
if (!(qualifierExpression instanceof PsiReferenceExpression)) {
return false;
}
final PsiReferenceExpression referenceExpression =
(PsiReferenceExpression)qualifierExpression;
final PsiExpression qualifier =
referenceExpression.getQualifierExpression();
if (qualifier != null && !(qualifier instanceof PsiThisExpression) &&
!(qualifier instanceof PsiSuperExpression)) {
return false;
}
final PsiElement target = referenceExpression.resolve();
return listVariable.equals(target);
}
private boolean isArrayLookup(PsiElement element, String indexName, PsiVariable arrayVariable) {
if (element == null) {
return false;
}
if (!(element instanceof PsiArrayAccessExpression)) {
return false;
}
final PsiArrayAccessExpression arrayAccess = (PsiArrayAccessExpression) element;
final PsiExpression indexExpression = arrayAccess.getIndexExpression();
if (indexExpression == null) {
return false;
}
if (!indexName.equals(indexExpression.getText())) {
return false;
}
final PsiExpression arrayExpression = arrayAccess.getArrayExpression();
if (!(arrayExpression instanceof PsiReferenceExpression)) {
return false;
}
final PsiReferenceExpression referenceExpression = (PsiReferenceExpression) arrayExpression;
final PsiExpression qualifier = referenceExpression.getQualifierExpression();
if (qualifier != null
&& !(qualifier instanceof PsiThisExpression)
&& !(qualifier instanceof PsiSuperExpression)) {
return false;
}
final PsiElement target = referenceExpression.resolve();
return arrayVariable.equals(target);
}
private boolean isIteratorNext(
PsiElement element, String iteratorName, PsiType contentType) {
if (element == null) {
return false;
}
if (element instanceof PsiTypeCastExpression) {
final PsiTypeCastExpression castExpression =
(PsiTypeCastExpression)element;
final PsiType type = castExpression.getType();
if (type == null) {
return false;
}
if (!type.equals(contentType)) {
return false;
}
final PsiExpression operand =
castExpression.getOperand();
return isIteratorNext(operand, iteratorName, contentType);
}
if (!(element instanceof PsiMethodCallExpression)) {
return false;
}
final PsiMethodCallExpression callExpression =
(PsiMethodCallExpression)element;
final PsiExpressionList argumentList =
callExpression.getArgumentList();
final PsiExpression[] args = argumentList.getExpressions();
if (args.length != 0) {
return false;
}
final PsiReferenceExpression reference =
callExpression.getMethodExpression();
final PsiExpression qualifier = reference.getQualifierExpression();
if (qualifier == null) {
return false;
}
if (!iteratorName.equals(qualifier.getText())) {
return false;
}
final String referenceName = reference.getReferenceName();
return HardcodedMethodConstants.NEXT.equals(referenceName);
}
@Nullable
private static PsiType getQualifierCastType(
PsiJavaReference javaReference, CompletionParameters parameters) {
if (javaReference instanceof PsiReferenceExpression) {
final PsiReferenceExpression refExpr = (PsiReferenceExpression) javaReference;
final PsiExpression qualifier = refExpr.getQualifierExpression();
if (qualifier != null) {
final Project project = qualifier.getProject();
PsiType type = null;
final PairFunction<PsiExpression, CompletionParameters, PsiType> evaluator =
refExpr.getContainingFile().getCopyableUserData(DYNAMIC_TYPE_EVALUATOR);
if (evaluator != null) {
type = evaluator.fun(qualifier, parameters);
}
if (type == null) {
type = GuessManager.getInstance(project).getControlFlowExpressionType(qualifier);
}
return type;
}
}
return null;
}
private NamesByExprInfo suggestVariableNameByExpressionOnly(
PsiExpression expr,
final VariableKind variableKind,
boolean correctKeywords,
boolean useAllMethodNames) {
if (expr instanceof PsiMethodCallExpression) {
PsiReferenceExpression methodExpr = ((PsiMethodCallExpression) expr).getMethodExpression();
String methodName = methodExpr.getReferenceName();
if (methodName != null) {
if ("of".equals(methodName) || "ofNullable".equals(methodName)) {
if (isJavaUtilMethodCall((PsiMethodCallExpression) expr)) {
PsiExpression[] expressions =
((PsiMethodCallExpression) expr).getArgumentList().getExpressions();
if (expressions.length > 0) {
return suggestVariableNameByExpressionOnly(
expressions[0], variableKind, correctKeywords, useAllMethodNames);
}
}
}
if ("map".equals(methodName)
|| "flatMap".equals(methodName)
|| "filter".equals(methodName)) {
if (isJavaUtilMethodCall((PsiMethodCallExpression) expr)) {
return new NamesByExprInfo(null);
}
}
String[] words = NameUtil.nameToWords(methodName);
if (words.length > 0) {
final String firstWord = words[0];
if (GET_PREFIX.equals(firstWord)
|| IS_PREFIX.equals(firstWord)
|| FIND_PREFIX.equals(firstWord)
|| CREATE_PREFIX.equals(firstWord)) {
if (words.length > 1) {
final String propertyName = methodName.substring(firstWord.length());
String[] names =
getSuggestionsByName(propertyName, variableKind, false, correctKeywords);
final PsiExpression qualifierExpression = methodExpr.getQualifierExpression();
if (qualifierExpression instanceof PsiReferenceExpression
&& ((PsiReferenceExpression) qualifierExpression).resolve()
instanceof PsiVariable) {
names =
ArrayUtil.append(
names,
StringUtil.sanitizeJavaIdentifier(
changeIfNotIdentifier(
qualifierExpression.getText()
+ StringUtil.capitalize(propertyName))));
}
return new NamesByExprInfo(propertyName, names);
}
} else if (words.length == 1 || useAllMethodNames) {
return new NamesByExprInfo(
methodName, getSuggestionsByName(methodName, variableKind, false, correctKeywords));
}
}
}
} else if (expr instanceof PsiReferenceExpression) {
String propertyName = ((PsiReferenceExpression) expr).getReferenceName();
PsiElement refElement = ((PsiReferenceExpression) expr).resolve();
if (refElement instanceof PsiVariable) {
VariableKind refVariableKind = getVariableKind((PsiVariable) refElement);
propertyName = variableNameToPropertyName(propertyName, refVariableKind);
}
if (refElement != null && propertyName != null) {
String[] names = getSuggestionsByName(propertyName, variableKind, false, correctKeywords);
return new NamesByExprInfo(propertyName, names);
}
} else if (expr instanceof PsiArrayAccessExpression) {
PsiExpression arrayExpr = ((PsiArrayAccessExpression) expr).getArrayExpression();
if (arrayExpr instanceof PsiReferenceExpression) {
String arrayName = ((PsiReferenceExpression) arrayExpr).getReferenceName();
PsiElement refElement = ((PsiReferenceExpression) arrayExpr).resolve();
if (refElement instanceof PsiVariable) {
VariableKind refVariableKind = getVariableKind((PsiVariable) refElement);
arrayName = variableNameToPropertyName(arrayName, refVariableKind);
}
if (arrayName != null) {
String name = StringUtil.unpluralize(arrayName);
if (name != null) {
String[] names = getSuggestionsByName(name, variableKind, false, correctKeywords);
return new NamesByExprInfo(name, names);
}
}
}
} else if (expr instanceof PsiLiteralExpression
&& variableKind == VariableKind.STATIC_FINAL_FIELD) {
final PsiLiteralExpression literalExpression = (PsiLiteralExpression) expr;
final Object value = literalExpression.getValue();
if (value instanceof String) {
final String stringValue = (String) value;
String[] names = getSuggestionsByValue(stringValue);
if (names.length > 0) {
return new NamesByExprInfo(null, constantValueToConstantName(names));
}
}
} else if (expr instanceof PsiParenthesizedExpression) {
return suggestVariableNameByExpressionOnly(
((PsiParenthesizedExpression) expr).getExpression(),
variableKind,
correctKeywords,
useAllMethodNames);
} else if (expr instanceof PsiTypeCastExpression) {
return suggestVariableNameByExpressionOnly(
((PsiTypeCastExpression) expr).getOperand(),
variableKind,
correctKeywords,
useAllMethodNames);
} else if (expr instanceof PsiLiteralExpression) {
final String text = StringUtil.stripQuotesAroundValue(expr.getText());
if (isIdentifier(text)) {
return new NamesByExprInfo(
text, getSuggestionsByName(text, variableKind, false, correctKeywords));
}
}
return new NamesByExprInfo(null, ArrayUtil.EMPTY_STRING_ARRAY);
}
@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 =
ParenthesesUtils.stripParentheses(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();
}
@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 PsiType type = arrayReference.getType();
if (!(type instanceof PsiArrayType)) {
return null;
}
final PsiArrayType arrayType = (PsiArrayType) type;
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();
}