Package com.amazonaws.services.dynamodbv2.document

Examples of com.amazonaws.services.dynamodbv2.document.QueryFilter


    @Test
    public void howToUseQueryFilters() {
        Table table = dynamo.getTable(TABLE_NAME);
        ItemCollection<QueryOutcome> col = table.query(HASH_KEY_NAME, "foo",
            new RangeKeyCondition(RANGE_KEY_NAME).between(1, 10),
            new QueryFilter("intAttr").gt(1238));
        int count = 0;
        QueryOutcome lastOutcome = null;
        for (Item item: col) {
            Assert.assertTrue(item.getInt("intAttr") > 1238);
            System.out.println(item);
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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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                // update call
                ExpectedAttributeValue expected = new ExpectedAttributeValue();

                // For new objects, insist that the value doesn't exist.
                // For existing ones, insist it has the old value.
                AttributeValue currentValue = getSimpleAttributeValue(method, getterResult);
                expected.setExists(currentValue != null);
                if ( currentValue != null ) {
                    expected.setValue(currentValue);
                }
                expectedValues.put(attributeName, expected);
            }

            AttributeValue newVersionValue = getVersionAttributeValue(method, getterResult);
            updateValues
                    .put(attributeName, new AttributeValueUpdate().withAction("PUT").withValue(newVersionValue));
            inMemoryUpdates.add(new ValueUpdate(method, newVersionValue, object));
        }
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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 ) {
                        updateValues.put(attributeName, new AttributeValueUpdate().withValue(currentValue)
                                .withAction("PUT"));
                        nonKeyAttributePresent = true;
                    } else {
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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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                // update call
                ExpectedAttributeValue expected = new ExpectedAttributeValue();

                // For new objects, insist that the value doesn't exist.
                // For existing ones, insist it has the old value.
                AttributeValue currentValue = getSimpleAttributeValue(method, getterResult);
                expected.setExists(currentValue != null);
                if ( currentValue != null ) {
                    expected.setValue(currentValue);
                }
                expectedValues.put(attributeName, expected);
            }

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