Example usage for com.amazonaws.services.dynamodbv2.document Item asMap

Introduction

In this page you can find the example usage for com.amazonaws.services.dynamodbv2.document Item asMap.

Prototype

public Map<String, Object> asMap() 

Source Link

Document

Returns all attributes of the current item as a map.

Usage

From source file:com.erudika.para.persistence.AWSDynamoDAO.java

License:Apache License

private <P extends ParaObject> String readPageFromSharedTable(String appid, Pager pager,
        LinkedList<P> results) {
    String lastKeyFragment = "";
    ValueMap valueMap = new ValueMap().withString(":aid", appid);
    NameMap nameMap = null;/*from  www  . ja v  a  2 s.co  m*/

    if (!StringUtils.isBlank(pager.getLastKey())) {
        lastKeyFragment = " and #stamp > :ts";
        valueMap.put(":ts", pager.getLastKey());
        nameMap = new NameMap().with("#stamp", Config._TIMESTAMP);
    }

    Index index = getSharedIndex();
    QuerySpec spec = new QuerySpec().withMaxPageSize(pager.getLimit()).withMaxResultSize(pager.getLimit())
            .withKeyConditionExpression(Config._APPID + " = :aid" + lastKeyFragment).withValueMap(valueMap)
            .withNameMap(nameMap);

    if (index != null) {
        Page<Item, QueryOutcome> items = index.query(spec).firstPage();
        for (Item item : items) {
            P obj = ParaObjectUtils.setAnnotatedFields(item.asMap());
            if (obj != null) {
                results.add(obj);
            }
        }
    }

    if (!results.isEmpty()) {
        return Long.toString(results.peekLast().getTimestamp());
    } else {
        return null;
    }
}

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