@Override
public void visitBinaryExpression(PsiBinaryExpression expression) {
final IElementType tokenType = expression.getOperationTokenType();
if (JavaTokenType.OROR != tokenType) {
return;
}
final PsiExpression lhs = expression.getLOperand();
final PsiExpression rhs = expression.getROperand();
final Pair<PsiReferenceExpression, PsiExpression> pair1 = getReferenceExpressionPair(lhs);
final Pair<PsiReferenceExpression, PsiExpression> pair2 = getReferenceExpressionPair(rhs);
if (pair1 == null || pair2 == null) {
return;
}
final PsiExpression expression1 = pair1.getSecond();
final PsiExpression expression2 = pair2.getSecond();
if (expression1 == null || expression2 == null) {
return;
}
final Project project = expression1.getProject();
final JavaPsiFacade psiFacade = JavaPsiFacade.getInstance(project);
final PsiConstantEvaluationHelper constantEvaluationHelper =
psiFacade.getConstantEvaluationHelper();
final Object constant1 = constantEvaluationHelper.computeConstantExpression(expression1);
final Object constant2 = constantEvaluationHelper.computeConstantExpression(expression2);
if (constant1 == null || constant2 == null || constant1 == constant2) {
return;
}
final PsiReferenceExpression referenceExpression1 = pair1.getFirst();
final PsiReferenceExpression referenceExpression2 = pair2.getFirst();
if (referenceExpression1.resolve() == referenceExpression2.resolve()) {
registerError(expression);
}
}
private boolean isTrivial(PsiMethod method) {
final PsiCodeBlock body = method.getBody();
if (body == null) {
return true;
}
final PsiStatement[] statements = body.getStatements();
if (statements.length == 0) {
return true;
}
final Project project = method.getProject();
final JavaPsiFacade psiFacade = JavaPsiFacade.getInstance(project);
final PsiConstantEvaluationHelper evaluationHelper = psiFacade.getConstantEvaluationHelper();
for (PsiStatement statement : statements) {
if (!(statement instanceof PsiIfStatement)) {
return false;
}
final PsiIfStatement ifStatement = (PsiIfStatement) statement;
final PsiExpression condition = ifStatement.getCondition();
final Object result = evaluationHelper.computeConstantExpression(condition);
if (result == null || !result.equals(Boolean.FALSE)) {
return false;
}
}
return true;
}
