private void checkExpectedValues()

in src/main/java/com/amazonaws/services/dynamodbv2/transactions/TransactionDynamoDBFacade.java [113:140]

• 24 lines of code
• 8 McCabe index (conditional complexity)

    private void checkExpectedValues(String tableName,
            Map<String, AttributeValue> itemKey,
            Map<String, ExpectedAttributeValue> expectedValues) {
        if (expectedValues != null && !expectedValues.isEmpty()) {
            for (Map.Entry<String, ExpectedAttributeValue> entry : expectedValues.entrySet()) {
                if ((entry.getValue().isExists() == null || entry.getValue().isExists() == true)
                        && entry.getValue().getValue() == null) {
                    throw new IllegalArgumentException("An explicit value is required when Exists is null or true, "
                            + "but none was found in expected values for item with key " + itemKey +
                            ": " + expectedValues);
                }
            }

            // simulate by loading the item and checking the values;
            // this also has the effect of locking the item, which gives the
            // same behavior
            GetItemResult result = getItem(new GetItemRequest()
                    .withAttributesToGet(expectedValues.keySet())
                    .withKey(itemKey)
                    .withTableName(tableName));
            Map<String, AttributeValue> item = result.getItem();
            try {
                checkExpectedValues(expectedValues, item);
            } catch (ConditionalCheckFailedException e) {
                throw new ConditionalCheckFailedException("Item " + itemKey + " had unexpected attributes: " + e.getMessage());
            }
        }
    }