Examples of com.amazonaws.services.dynamodbv2.model.AttributeValue

Package com.amazonaws.services.dynamodbv2.model

Examples of com.amazonaws.services.dynamodbv2.model.AttributeValue

com.amazonaws.services.dynamodbv2.model.AttributeValue

Represents the data for an attribute. You can set one, and only one, of the elements.

        if (string.length() == 0) {
            // Sticking with the legacy behavior for now.
            return null;
        }


        return new AttributeValue().withS(string);
    }

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    }


    @Override
    public AttributeValue marshall(Object obj) {
        Map<String, AttributeValue> values = converter.convert(obj);
        return new AttributeValue().withM(values);
    }

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            // Scan items for movies with a year attribute greater than 1985
            HashMap<String, Condition> scanFilter = new HashMap<String, Condition>();
            Condition condition = new Condition()
                .withComparisonOperator(ComparisonOperator.GT.toString())
                .withAttributeValueList(new AttributeValue().withN("1985"));
            scanFilter.put("year", condition);
            ScanRequest scanRequest = new ScanRequest(tableName).withScanFilter(scanFilter);
            ScanResult scanResult = dynamoDB.scan(scanRequest);
            System.out.println("Result: " + scanResult);

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        }
    }


    private static Map<String, AttributeValue> newItem(String name, int year, String rating, String... fans) {
        Map<String, AttributeValue> item = new HashMap<String, AttributeValue>();
        item.put("name", new AttributeValue(name));
        item.put("year", new AttributeValue().withN(Integer.toString(year)));
        item.put("rating", new AttributeValue(rating));
        item.put("fans", new AttributeValue().withSS(fans));


        return item;
    }

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     * @param key The key to store in the map
     * @param value The value to check before inserting into the item map
     */
    private void putStringIfNonempty(Map<String, AttributeValue> item, String key, String value) {
        if (value != null && !value.isEmpty()) {
            item.put(key, new AttributeValue().withS(value));
        }
    }

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    private <T> Map<String, AttributeValue> getKey(T keyObject, Class<T> clazz) {
        Map<String, AttributeValue> key = new HashMap<String, AttributeValue>();
        for (Method keyGetter : reflector.getKeyGetters(clazz)) {
            Object getterResult = safeInvoke(keyGetter, keyObject);
            AttributeValue keyAttributeValue = getSimpleAttributeValue(keyGetter, getterResult);
            if (keyAttributeValue == null) {
                throw new DynamoDBMappingException("Null key found for " + keyGetter);
            }
            key.put(reflector.getAttributeName(keyGetter), keyAttributeValue);
        }

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                if ( reflector.isVersionAttributeGetter(method) ) {
                    Object getterResult = safeInvoke(method, object);
                    String attributeName = reflector.getAttributeName(method);


                    ExpectedAttributeValue expected = new ExpectedAttributeValue();
                    AttributeValue currentValue = getSimpleAttributeValue(method, getterResult);
                    expected.setExists(currentValue != null);
                    if ( currentValue != null )
                        expected.setValue(currentValue);
                    expectedValues.put(attributeName, expected);
                    break;

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            // Look at every getter and construct a value object for it
            for ( Method method : reflector.getRelevantGetters(clazz) ) {
                Object getterResult = safeInvoke(method, toWrite);
                String attributeName = reflector.getAttributeName(method);


                AttributeValue currentValue = null;
                if ( getterResult == null && reflector.isAssignableKey(method) ) {
                    currentValue = getAutoGeneratedKeyAttributeValue(method, getterResult);
                    inMemoryUpdates.add(new ValueUpdate(method, currentValue, toWrite));
                } else {
                    currentValue = getSimpleAttributeValue(method, getterResult);

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                if ( getterResult == null && reflector.isAssignableKey(method) ) {
                    onAutoGenerateAssignableKey(method, attributeName);
                }


                else {
                    AttributeValue newAttributeValue = getSimpleAttributeValue(method, getterResult);
                    if ( newAttributeValue == null ) {
                        throw new DynamoDBMappingException("Null or empty value for key: " + method);
                    }


                    onKeyAttributeValue(attributeName, newAttributeValue);
                }
            }


            /*
             * Next construct an update for every non-key property
             */
            for ( Method method : reflector.getRelevantGetters(clazz) ) {


                // Skip any key methods, since they are handled separately
                if ( keyGetters.contains(method) )
                    continue;


                Object getterResult = safeInvoke(method, object);
                String attributeName = reflector.getAttributeName(method);


                /*
                 * If this is a versioned field, update it
                 */
                if ( reflector.isVersionAttributeGetter(method) ) {
                    onVersionAttribute(method, getterResult, attributeName);
                    nonKeyAttributePresent = true;
                }


                /*
                 * Otherwise apply the update value for this attribute.
                 */
                else  {
                    AttributeValue currentValue = getSimpleAttributeValue(method, getterResult);
                    if ( currentValue != null ) {
                        onNonKeyAttribute(attributeName, currentValue);
                        nonKeyAttributePresent = true;
                    } else {
                        onNullNonKeyAttribute(attributeName);

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        protected List<ValueUpdate> getInMemoryUpdates() {
            return inMemoryUpdates;
        }


        private void onAutoGenerateAssignableKey(Method method, String attributeName) {
            AttributeValue newVersionValue = getAutoGeneratedKeyAttributeValue(method, null);


            updateValues.put(attributeName,
                    new AttributeValueUpdate().withAction("PUT").withValue(newVersionValue));
            inMemoryUpdates.add(new ValueUpdate(method, newVersionValue, object));

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