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

Package com.amazonaws.services.dynamodbv2.model

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

com.amazonaws.services.dynamodbv2.model.Condition
Represents a selection criteria for a Query or Scan operation.
- For a Query operation, the condition specifies the key attributes to use when querying a table or an index.
- For a Scan operation, the condition is used to evaluate the scan results and return only the desired values.
Multiple conditions are "ANDed" together. In other words, all of the conditions must be met to be included in the output.


////    // 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);

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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);

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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);

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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);

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    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);

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            new QueryRequest()
                .withTableName(tableName)
                .withKeyConditions(createHashKeyCondition("id", hashKey))
                ;


        Condition rangeKeyCondition = new Condition();
        List<AttributeValue> attributeValueList = new ArrayList<AttributeValue>();
        attributeValueList.add(createStringAttribute("Range2"));
        rangeKeyCondition.setAttributeValueList(attributeValueList);
        rangeKeyCondition.setComparisonOperator(ComparisonOperator.EQ);
        request.getKeyConditions().put("range", rangeKeyCondition);


        QueryResult result = getClient().query(request);


        Assert.assertNotNull("Null result.", result);

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        String hashCode = "hash2";
        TestClassWithHashRangeKey hashKeyTemplate = new TestClassWithHashRangeKey();
        hashKeyTemplate.setHashCode(hashCode);


    Condition rangeKeyCondition = new Condition();
    List<AttributeValue> rangeValues = new ArrayList<AttributeValue>();
    rangeValues.add(new AttributeValue().withS("range2c"));
    rangeValues.add(new AttributeValue().withS("range2d"));
    rangeKeyCondition.setComparisonOperator(ComparisonOperator.BETWEEN);
    rangeKeyCondition.setAttributeValueList(rangeValues);


    DynamoDBQueryExpression<TestClassWithHashRangeKey> query = new DynamoDBQueryExpression<TestClassWithHashRangeKey>()
                .withHashKeyValues(hashKeyTemplate)
                .withRangeKeyCondition("rangeCode", rangeKeyCondition)
                ;

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        String hashCode = "hash1x";


        TestClassWithHashRangeKey hashKeyTemplate = new TestClassWithHashRangeKey();
        hashKeyTemplate.setHashCode(hashCode);


        Condition rangeKeyCondition =
            new Condition()
                .withComparisonOperator(ComparisonOperator.NOT_NULL)
                ;


    DynamoDBQueryExpression<TestClassWithHashRangeKey> query = new DynamoDBQueryExpression<TestClassWithHashRangeKey>()
                .withHashKeyValues(hashKeyTemplate)

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  public void queryWithUnknownHashRangeKey2() {
        putItemWithHashKeyAndRangeKey();


        String hashCode = "hash2";


    Condition rangeKeyCondition = new Condition();
    List<AttributeValue> attributeValueList = new ArrayList<AttributeValue>();
    attributeValueList.add(new AttributeValue().withS("range2x"));
    attributeValueList.add(new AttributeValue().withS("range2y"));
    rangeKeyCondition.setAttributeValueList(attributeValueList);
    rangeKeyCondition.setComparisonOperator(ComparisonOperator.BETWEEN);


        TestClassWithHashRangeKey hashKeyTemplate = new TestClassWithHashRangeKey();
        hashKeyTemplate.setHashCode(hashCode);


    DynamoDBQueryExpression<TestClassWithHashRangeKey> query = new DynamoDBQueryExpression<TestClassWithHashRangeKey>()

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            new QueryRequest()
                .withTableName(tableName)
                .withKeyConditions(createHashKeyCondition("id", hashKey))
                ;


    Condition rangeKeyCondition = new Condition();
    List<AttributeValue> attributeValueList = new ArrayList<AttributeValue>();
//    attributeValueList.add(new AttributeValue().withN("1"));
    attributeValueList.add(createStringAttribute("Range2"));
    rangeKeyCondition.setAttributeValueList(attributeValueList);
    rangeKeyCondition.setComparisonOperator(ComparisonOperator.EQ);
    request.getKeyConditions().put("range", rangeKeyCondition);


        QueryResult result = getClient().query(request);


        Assert.assertNotNull("Null result.", result);

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