evaluate method

evaluate(field, expression)

Evaluates comparison expression.

def evaluate(self, field: aspose.words.fields.Field, expression: aspose.words.fields.ComparisonExpression):
    ...
ParameterTypeDescription
fieldField
expressionComparisonExpression

Remarks

The implementation should return None to indicate that the default evaluation should be performed.

Examples

Shows how to implement custom evaluation for the IF and COMPARE fields (ComparisonExpressionEvaluator).

class ComparisonExpressionEvaluator(aw.fields.IComparisonExpressionEvaluator):

    def __init__(self, result):
        self.m_invocations = []
        self.m_result = result
        if self.m_result != None:
            print(self.m_result.error_message)
            print(self.m_result.result)

    def evaluate(self, field, expression):
        self.m_invocations.append([expression.left_expression, expression.comparison_operator, expression.right_expression])
        return self.m_result

    def assert_invocations_count(self, expected):
        self.assertEqual(expected, len(self.m_invocations))
        return self

    def assert_invocation_arguments(self, invocation_index, expected_left_expression, expected_comparison_operator, expected_right_expression):
        arguments = self.m_invocations[invocation_index]
        self.assertEqual(expected_left_expression, arguments[0])
        self.assertEqual(expected_comparison_operator, arguments[1])
        self.assertEqual(expected_right_expression, arguments[2])
        return self

See Also