Examples of com.amazonaws.services.dynamodb.model.ScanRequest

Package com.amazonaws.services.dynamodb.model

Examples of com.amazonaws.services.dynamodb.model.ScanRequest

com.amazonaws.services.dynamodb.model.ScanRequest
Container for the parameters to the {@link com.amazonaws.services.dynamodb.AmazonDynamoDB#scan(ScanRequest) Scan operation}.
Retrieves one or more items and its attributes by performing a full scan of a table.

Provide a ScanFilter to get more specific results.
@see com.amazonaws.services.dynamodb.AmazonDynamoDB#scan(ScanRequest)




//    // TODO: Exception!
    @Test
    public void scanWithScanFilterLETest() {
        ScanRequest request = getBasicReq();
        Condition rangeKeyCondition = new Condition();
        List<AttributeValue> attributeValueList = new ArrayList<AttributeValue>();
//        attributeValueList.add(new AttributeValue().withN(rangeKey.getN()));
        attributeValueList.add(new AttributeValue().withN("120"));
        rangeKeyCondition.setAttributeValueList(attributeValueList);
        rangeKeyCondition.setComparisonOperator(ComparisonOperator.LE);
        Map<String, Condition> conditionMap = new HashMap<String, Condition>();
        conditionMap.put("range", rangeKeyCondition);
        request.setScanFilter(conditionMap);
        ScanResult result = getClient().scan(request);
        Assert.assertNotNull(result);
        Assert.assertNotNull(result.getItems());
        for (Map<String, AttributeValue> item : result.getItems()) {
//            Assert.assertTrue(new Integer(item.get("range").getN()) <= new Integer(rangeKey.getN()));

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        }
    }


    @Test
    public void scanWithScanFilterLTTest() {
        ScanRequest request = getBasicReq();
        Condition rangeKeyCondition = new Condition();
        List<AttributeValue> attributeValueList = new ArrayList<AttributeValue>();
        attributeValueList.add(new AttributeValue().withN("0"));
        rangeKeyCondition.setAttributeValueList(attributeValueList);
        rangeKeyCondition.setComparisonOperator(ComparisonOperator.LT);
        Map<String, Condition> conditionMap = new HashMap<String, Condition>();
        conditionMap.put("range", rangeKeyCondition);
        request.setScanFilter(conditionMap);
        ScanResult result = getClient().scan(request);
        Assert.assertNotNull(result);
        Assert.assertNotNull(result.getItems());
        for (Map<String, AttributeValue> item : result.getItems()) {
            Assert.assertTrue(new Integer(item.get("range").getN()) < new Integer(new AttributeValue().withN("0").getN()));

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////    // TODO: Exception!
    @Test
    public void scanWithScanFilterINTest() {
        ScanRequest request = getBasicReq();
        Condition rangeKeyCondition = new Condition();
        List<AttributeValue> attributeValueList = new ArrayList<AttributeValue>();
        attributeValueList.add(new AttributeValue().withN("100"));
        attributeValueList.add(new AttributeValue().withN("101"));
        attributeValueList.add(new AttributeValue().withN("102"));
        rangeKeyCondition.setAttributeValueList(attributeValueList);
        rangeKeyCondition.setComparisonOperator(ComparisonOperator.IN);
        Map<String, Condition> conditionMap = new HashMap<String, Condition>();
        conditionMap.put("range", rangeKeyCondition);
        request.setScanFilter(conditionMap);
        ScanResult result = getClient().scan(request);
        Assert.assertNotNull(result);
        Assert.assertNotNull(result.getItems());
        for (Map<String, AttributeValue> item : result.getItems()) {
            Assert.assertTrue(new Integer(item.get("range").getN()) == 102 || new Integer(item.get("range").getN()) == 101 || new Integer(item.get("range").getN()) == 100);

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        }
    }


    @Test
    public void scanWithScanFilterBETWEENTest() {
        ScanRequest request = getBasicReq();
        Condition rangeKeyCondition = new Condition();
        List<AttributeValue> attributeValueList = new ArrayList<AttributeValue>();
        attributeValueList.add(new AttributeValue().withN("100"));
        attributeValueList.add(new AttributeValue().withN("104"));
        rangeKeyCondition.setAttributeValueList(attributeValueList);
        rangeKeyCondition.setComparisonOperator(ComparisonOperator.BETWEEN);
        Map<String, Condition> conditionMap = new HashMap<String, Condition>();
        conditionMap.put("range", rangeKeyCondition);
        request.setScanFilter(conditionMap);


        ScanResult result = getClient().scan(request);
        Assert.assertNotNull(result);
        Assert.assertNotNull(result.getItems());
        Assert.assertEquals(40, result.getItems().size());

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        }
    }


    @Test
    public void scanWithScanFilterBEGINSWITHTest() {
        ScanRequest request = getBasicReq();
        Condition rangeKeyCondition = new Condition();
        List<AttributeValue> attributeValueList = new ArrayList<AttributeValue>();
        attributeValueList.add(new AttributeValue().withS("5"));
        rangeKeyCondition.setAttributeValueList(attributeValueList);
        rangeKeyCondition.setComparisonOperator(ComparisonOperator.BEGINS_WITH);
        Map<String, Condition> conditionMap = new HashMap<String, Condition>();
        conditionMap.put("string", rangeKeyCondition);
        request.setScanFilter(conditionMap);


        ScanResult result = getClient().scan(request);
        Assert.assertNotNull(result);
        Assert.assertNotNull(result.getItems());
        Assert.assertEquals(100, result.getItems().size());

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        }
    }


    @Test
    public void scanWithScanFilterCONTAINSTest() {
        ScanRequest request = getBasicReq();
        Condition rangeKeyCondition = new Condition();
        List<AttributeValue> attributeValueList = new ArrayList<AttributeValue>();
        attributeValueList.add(new AttributeValue().withN("4"));
        rangeKeyCondition.setAttributeValueList(attributeValueList);
        rangeKeyCondition.setComparisonOperator(ComparisonOperator.CONTAINS);
        Map<String, Condition> conditionMap = new HashMap<String, Condition>();
        conditionMap.put("range", rangeKeyCondition);
        request.setScanFilter(conditionMap);


        ScanResult result = getClient().scan(request);
        Assert.assertNotNull(result);
        Assert.assertNotNull(result.getItems());
        Assert.assertEquals(40, result.getItems().size());

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        }
    }


    @Test
    public void scanWithScanFilterMultipleConditionsTest() throws Exception {
        ScanRequest request = getBasicReq();
        final Map<String, Condition> conditionMap = new HashMap<String, Condition>();


        //First condition
        Condition rangeKeyCondition = new Condition();
        List<AttributeValue> attributeValueList = new ArrayList<AttributeValue>();
        attributeValueList.add(new AttributeValue().withN("4"));
        rangeKeyCondition.setAttributeValueList(attributeValueList);
        rangeKeyCondition.setComparisonOperator(ComparisonOperator.EQ);
        conditionMap.put("range", rangeKeyCondition);


        //Second condition
        //Note: this is purely for testing; in real applications, conditions would probably use different attributes
        rangeKeyCondition = new Condition();
        attributeValueList = new ArrayList<AttributeValue>();
        attributeValueList.add(new AttributeValue().withN("4"));
        rangeKeyCondition.setAttributeValueList(attributeValueList);
        rangeKeyCondition.setComparisonOperator(ComparisonOperator.EQ);
        conditionMap.put("second", rangeKeyCondition);


        request.setScanFilter(conditionMap);


        ScanResult result = getClient().scan(request);
        Assert.assertNotNull(result);
        Assert.assertNotNull(result.getItems());
        //Should be no duplicates

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    }
*/




    protected ScanRequest getBasicReq() {
        ScanRequest req = new ScanRequest();
        req.setTableName(tableName);
        return req;
    }

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     * @see PaginatedScanList
     */
    public <T> PaginatedScanList<T> scan(Class<T> clazz, DynamoDBScanExpression scanExpression, DynamoDBMapperConfig config) {
        config = mergeConfig(config);


        ScanRequest scanRequest = createScanRequestFromExpression(clazz, scanExpression, config);


        ScanResult scanResult = db.scan(applyUserAgent(scanRequest));
        return new PaginatedScanList<T>(this, clazz, db, scanRequest, scanResult);
    }

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     *            default provided at object construction.
     */
    public <T> ScanResultPage<T> scanPage(Class<T> clazz, DynamoDBScanExpression scanExpression, DynamoDBMapperConfig config) {
        config = mergeConfig(config);


        ScanRequest scanRequest = createScanRequestFromExpression(clazz, scanExpression, config);


        ScanResult scanResult = db.scan(applyUserAgent(scanRequest));
        ScanResultPage<T> result = new ScanResultPage<T>();
        result.setResults(marshallIntoObjects(clazz, scanResult.getItems()));
        result.setLastEvaluatedKey(scanResult.getLastEvaluatedKey());

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