public static boolean isAssociativeOperation(PsiPolyadicExpression expression) {
final IElementType tokenType = expression.getOperationTokenType();
final PsiType type = expression.getType();
final PsiPrimitiveType primitiveType;
if (type instanceof PsiClassType) {
primitiveType = PsiPrimitiveType.getUnboxedType(type);
if (primitiveType == null) {
return false;
}
} else if (type instanceof PsiPrimitiveType) {
primitiveType = (PsiPrimitiveType) type;
} else {
return false;
}
if (JavaTokenType.PLUS == tokenType || JavaTokenType.ASTERISK == tokenType) {
return !PsiType.FLOAT.equals(primitiveType) && !PsiType.DOUBLE.equals(primitiveType);
} else if (JavaTokenType.EQEQ == tokenType || JavaTokenType.NE == tokenType) {
return PsiType.BOOLEAN.equals(primitiveType);
} else if (JavaTokenType.AND == tokenType
|| JavaTokenType.OR == tokenType
|| JavaTokenType.XOR == tokenType) {
return true;
} else if (JavaTokenType.OROR == tokenType || JavaTokenType.ANDAND == tokenType) {
return true;
}
return false;
}
private static void checkMethodCall(RefElement refWhat, final PsiElement element) {
if (!(refWhat instanceof RefMethod)) return;
final RefMethod refMethod = (RefMethod) refWhat;
final PsiElement psiElement = refMethod.getElement();
if (!(psiElement instanceof PsiMethod)) return;
final PsiMethod psiMethod = (PsiMethod) psiElement;
if (!PsiType.BOOLEAN.equals(psiMethod.getReturnType())) return;
element.accept(
new JavaRecursiveElementWalkingVisitor() {
@Override
public void visitMethodCallExpression(PsiMethodCallExpression call) {
super.visitMethodCallExpression(call);
final PsiReferenceExpression methodExpression = call.getMethodExpression();
if (methodExpression.isReferenceTo(psiMethod)) {
if (isInvertedMethodCall(methodExpression)) return;
refMethod.putUserData(ALWAYS_INVERTED, Boolean.FALSE);
}
}
@Override
public void visitMethodReferenceExpression(PsiMethodReferenceExpression expression) {
super.visitMethodReferenceExpression(expression);
if (expression.isReferenceTo(psiElement)) {
refMethod.putUserData(ALWAYS_INVERTED, Boolean.FALSE);
}
}
});
}
@Override
public void onInitialize(RefElement refElement) {
if (refElement instanceof RefMethod) {
final PsiElement element = refElement.getElement();
if (!(element instanceof PsiMethod)) return;
if (!PsiType.BOOLEAN.equals(((PsiMethod) element).getReturnType())) return;
refElement.putUserData(ALWAYS_INVERTED, Boolean.TRUE); // initial mark boolean methods
}
}
private static boolean isCompileTimeFlagReference(PsiElement element) {
PsiElement resolved =
element instanceof PsiReferenceExpression
? ((PsiReferenceExpression) element).resolve()
: null;
if (!(resolved instanceof PsiField)) return false;
PsiField field = (PsiField) resolved;
return field.hasModifierProperty(PsiModifier.FINAL)
&& field.hasModifierProperty(PsiModifier.STATIC)
&& PsiType.BOOLEAN.equals(field.getType());
}
private static PsiExpression getExpressionToSimplify(final Editor editor, final PsiFile file) {
int offset = editor.getCaretModel().getOffset();
PsiElement element = file.findElementAt(offset);
if (element == null) return null;
PsiExpression expression = PsiTreeUtil.getParentOfType(element, PsiExpression.class);
PsiElement parent = expression;
while (parent instanceof PsiExpression
&& (PsiType.BOOLEAN.equals(((PsiExpression) parent).getType())
|| parent instanceof PsiConditionalExpression)) {
expression = (PsiExpression) parent;
parent = parent.getParent();
}
return expression;
}
private boolean canBeReused(@NotNull DfaValue dfaValue) {
if (dfaValue instanceof DfaBoxedValue) {
DfaValue valueToWrap = ((DfaBoxedValue) dfaValue).getWrappedValue();
if (valueToWrap instanceof DfaConstValue) {
return cacheable((DfaConstValue) valueToWrap);
}
if (valueToWrap instanceof DfaVariableValue) {
if (PsiType.BOOLEAN.equals(((DfaVariableValue) valueToWrap).getVariableType())) return true;
for (DfaValue value : getEquivalentValues(valueToWrap)) {
if (value instanceof DfaConstValue && cacheable((DfaConstValue) value)) return true;
}
}
return false;
}
return true;
}
private static boolean isBoolean(@Nullable PsiType propertyType) {
return PsiType.BOOLEAN.equals(propertyType)
|| propertyType != null
&& CommonClassNames.JAVA_LANG_BOOLEAN.equals(propertyType.getCanonicalText());
}
public static boolean areParenthesesNeeded(
PsiExpression expression,
PsiExpression parentExpression,
boolean ignoreClarifyingParentheses) {
if (parentExpression instanceof PsiParenthesizedExpression
|| parentExpression instanceof PsiArrayInitializerExpression) {
return false;
}
final int parentPrecedence = getPrecedence(parentExpression);
final int childPrecedence = getPrecedence(expression);
if (parentPrecedence > childPrecedence) {
if (ignoreClarifyingParentheses) {
if (expression instanceof PsiPolyadicExpression) {
if (parentExpression instanceof PsiPolyadicExpression
|| parentExpression instanceof PsiConditionalExpression
|| parentExpression instanceof PsiInstanceOfExpression) {
return true;
}
} else if (expression instanceof PsiInstanceOfExpression) {
return true;
}
}
return false;
}
if (parentExpression instanceof PsiPolyadicExpression
&& expression instanceof PsiPolyadicExpression) {
final PsiPolyadicExpression parentPolyadicExpression =
(PsiPolyadicExpression) parentExpression;
final PsiType parentType = parentPolyadicExpression.getType();
if (parentType == null) {
return true;
}
final PsiPolyadicExpression childPolyadicExpression = (PsiPolyadicExpression) expression;
final PsiType childType = childPolyadicExpression.getType();
if (!parentType.equals(childType)) {
return true;
}
if (childType.equalsToText(CommonClassNames.JAVA_LANG_STRING)
&& !PsiTreeUtil.isAncestor(
parentPolyadicExpression.getOperands()[0], childPolyadicExpression, true)) {
final PsiExpression[] operands = childPolyadicExpression.getOperands();
for (PsiExpression operand : operands) {
if (!childType.equals(operand.getType())) {
return true;
}
}
} else if (childType.equals(PsiType.BOOLEAN)) {
final PsiExpression[] operands = childPolyadicExpression.getOperands();
for (PsiExpression operand : operands) {
if (!PsiType.BOOLEAN.equals(operand.getType())) {
return true;
}
}
}
final IElementType parentOperator = parentPolyadicExpression.getOperationTokenType();
final IElementType childOperator = childPolyadicExpression.getOperationTokenType();
if (ignoreClarifyingParentheses) {
if (!childOperator.equals(parentOperator)) {
return true;
}
}
final PsiExpression[] parentOperands = parentPolyadicExpression.getOperands();
if (!PsiTreeUtil.isAncestor(parentOperands[0], expression, false)) {
if (!isAssociativeOperation(parentPolyadicExpression)
|| JavaTokenType.DIV == childOperator
|| JavaTokenType.PERC == childOperator) {
return true;
}
}
} else if (parentExpression instanceof PsiConditionalExpression
&& expression instanceof PsiConditionalExpression) {
final PsiConditionalExpression conditionalExpression =
(PsiConditionalExpression) parentExpression;
final PsiExpression condition = conditionalExpression.getCondition();
return PsiTreeUtil.isAncestor(condition, expression, true);
}
return parentPrecedence < childPrecedence;
}