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

Package com.amazonaws.services.dynamodbv2.model

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

com.amazonaws.services.dynamodbv2.model.ExpectedAttributeValue

Represents an attribute value used with conditional DeleteItem , PutItem or UpdateItem operations. Amazon DynamoDB will check to see if the attribute value already exists; or if the attribute exists and has a particular value before updating it.


                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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            inMemoryUpdates.add(new ValueUpdate(method, newVersionValue, object));


            if ( getLocalSaveBehavior() != SaveBehavior.CLOBBER && !expectedValues.containsKey(attributeName)) {
                // Add an expect clause to make sure that the item
                // doesn't already exist, since it's supposed to be new
                ExpectedAttributeValue expected = new ExpectedAttributeValue();
                expected.setExists(false);
                expectedValues.put(attributeName, expected);
            }
        }

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        private void onVersionAttribute(Method method, Object getterResult,
                String attributeName) {
            if ( getLocalSaveBehavior() != SaveBehavior.CLOBBER && !expectedValues.containsKey(attributeName)) {
                // First establish the expected (current) value for the
                // 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);

View Full Code Here


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


                    ExpectedAttributeValue expected = new ExpectedAttributeValue();
                    AttributeValue currentValue = converter.convert(method, getterResult);
                    expected.setExists(currentValue != null);
                    if ( currentValue != null )
                        expected.setValue(currentValue);
                    internalAssertions.put(attributeName, expected);
                    break;
                }
            }
        }

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            if ( getLocalSaveBehavior() != SaveBehavior.CLOBBER
                    && !internalExpectedValueAssertions.containsKey(attributeName)) {
                // Add an expect clause to make sure that the item
                // doesn't already exist, since it's supposed to be new
                ExpectedAttributeValue expected = new ExpectedAttributeValue();
                expected.setExists(false);
                internalExpectedValueAssertions.put(attributeName, expected);
            }
        }

View Full Code Here

                String attributeName) {
            if ( getLocalSaveBehavior() != SaveBehavior.CLOBBER
                    && !internalExpectedValueAssertions.containsKey(attributeName)) {
                // First establish the expected (current) value for the
                // 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 = converter.convert(method, getterResult);
                expected.setExists(currentValue != null);
                if ( currentValue != null ) {
                    expected.setValue(currentValue);
                }
                internalExpectedValueAssertions.put(attributeName, expected);
            }


            Object newVersion = incrementor.increment(method, getterResult);

View Full Code Here

        Map<String, ExpectedAttributeValue> expectedValues = new HashMap<String, ExpectedAttributeValue>();


        String hashKeyAttributeName = reflector.getAttributeName(hashKeyGetter);
        Object hashGetterResult = safeInvoke(hashKeyGetter, object);
        attributes.put(hashKeyAttributeName, getSimpleAttributeValue(hashKeyGetter, hashGetterResult));
        expectedValues.put(hashKeyAttributeName, new ExpectedAttributeValue().withExists(false));


        if (rangeKeyGetter != null) {
            String rangeKeyAttributeName = reflector.getAttributeName(rangeKeyGetter);
            Object rangeGetterResult = safeInvoke(rangeKeyGetter, object);
            attributes.put(rangeKeyAttributeName, getSimpleAttributeValue(rangeKeyGetter, rangeGetterResult));
            expectedValues.put(rangeKeyAttributeName, new ExpectedAttributeValue().withExists(false));
        }
        
        attributes = transformAttributes(
            toParameters(attributes, clazz, config));

View Full Code Here


                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;
                }
            }
        }

View Full Code Here

            inMemoryUpdates.add(new ValueUpdate(method, newVersionValue, object));


            if ( getLocalSaveBehavior() != SaveBehavior.CLOBBER && !expectedValues.containsKey(attributeName)) {
                // Add an expect clause to make sure that the item
                // doesn't already exist, since it's supposed to be new
                ExpectedAttributeValue expected = new ExpectedAttributeValue();
                expected.setExists(false);
                expectedValues.put(attributeName, expected);
            }
        }

View Full Code Here

        private void onVersionAttribute(Method method, Object getterResult,
                String attributeName) {
            if ( getLocalSaveBehavior() != SaveBehavior.CLOBBER && !expectedValues.containsKey(attributeName)) {
                // First establish the expected (current) value for the
                // 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);

View Full Code Here

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