public static void queryIndex(String indexName) {

        Table table = dynamoDB.getTable(tableName);

        System.out.println("\n***********************************************************\n");
        System.out.print("Querying index " + indexName + "...");

        Index index = table.getIndex(indexName);

        ItemCollection<QueryOutcome> items = null;

        QuerySpec querySpec = new QuerySpec();

        if (indexName == "CreateDateIndex") {
            System.out.println("Issues filed on 2013-11-01");
            querySpec.withKeyConditionExpression("CreateDate = :v_date and begins_with(IssueId, :v_issue)")
                .withValueMap(new ValueMap().withString(":v_date", "2013-11-01").withString(":v_issue", "A-"));
            items = index.query(querySpec);
        }
        else if (indexName == "TitleIndex") {
            System.out.println("Compilation errors");
            querySpec.withKeyConditionExpression("Title = :v_title and begins_with(IssueId, :v_issue)")
                .withValueMap(new ValueMap().withString(":v_title", "Compilation error").withString(":v_issue", "A-"));
            items = index.query(querySpec);
        }
        else if (indexName == "DueDateIndex") {
            System.out.println("Items that are due on 2013-11-30");
            querySpec.withKeyConditionExpression("DueDate = :v_date")
                .withValueMap(new ValueMap().withString(":v_date", "2013-11-30"));
            items = index.query(querySpec);
        }
        else {
            System.out.println("\nNo valid index name provided");
            return;
        }

        Iterator<Item> iterator = items.iterator();

        System.out.println("Query: printing results...");

        while (iterator.hasNext()) {
            System.out.println(iterator.next().toJSONPretty());
        }

    }
 

public static void queryIndex(String indexName) {
    
    Table table = dynamoDB.getTable(tableName);

    System.out.println
    ("\n***********************************************************\n");
    System.out.print("Querying index " + indexName + "...");

    Index index = table.getIndex(indexName);

    ItemCollection<QueryOutcome> items = null;
    
    QuerySpec querySpec = new QuerySpec();

    if (indexName == "CreateDateIndex") {
        System.out.println("Issues filed on 2013-11-01");
        querySpec.withKeyConditionExpression("CreateDate = :v_date and begins_with(IssueId, :v_issue)")
            .withValueMap(new ValueMap()
                .withString(":v_date","2013-11-01")
                .withString(":v_issue","A-"));
        items = index.query(querySpec);
    } else if (indexName == "TitleIndex") {
        System.out.println("Compilation errors");
        querySpec.withKeyConditionExpression("Title = :v_title and begins_with(IssueId, :v_issue)")
            .withValueMap(new ValueMap()
                .withString(":v_title","Compilation error")
                .withString(":v_issue","A-"));
        items = index.query(querySpec);
    } else if (indexName == "DueDateIndex") {
        System.out.println("Items that are due on 2013-11-30");
        querySpec.withKeyConditionExpression("DueDate = :v_date")
            .withValueMap(new ValueMap()
                .withString(":v_date","2013-11-30"));
        items = index.query(querySpec);
    } else {
        System.out.println("\nNo valid index name provided");
        return;
    }

    Iterator<Item> iterator = items.iterator();

    System.out.println("Query: printing results...");

    while (iterator.hasNext()) {
        System.out.println(iterator.next().toJSONPretty());
    }


}