Example usage for com.amazonaws.services.dynamodbv2.datamodeling DynamoDBQueryExpression setExpressionAttributeValues

Introduction

In this page you can find the example usage for com.amazonaws.services.dynamodbv2.datamodeling DynamoDBQueryExpression setExpressionAttributeValues.

Prototype

public void setExpressionAttributeValues(java.util.Map<String, AttributeValue> expressionAttributeValues) 

Source Link

Document

One or more values that can be substituted in an expression.

Usage

From source file:org.openhab.persistence.dynamodb.internal.DynamoDBPersistenceService.java

License:Open Source License

private void maybeAddStateFilter(FilterCriteria filter,
        final DynamoDBQueryExpression<DynamoDBItem<?>> queryExpression) {
    if (filter.getOperator() != null && filter.getState() != null) {
        // Convert filter's state to DynamoDBItem in order get suitable string representation for the state
        final DynamoDBItem<?> filterState = AbstractDynamoDBItem.fromState(filter.getItemName(),
                filter.getState(), new Date());
        queryExpression.setFilterExpression(String.format("%s %s :opstate",
                DynamoDBItem.ATTRIBUTE_NAME_ITEMSTATE, operatorAsString(filter.getOperator())));

        filterState.accept(new DynamoDBItemVisitor() {

            @Override/*from  w  w w.j ava  2s .co  m*/
            public void visit(DynamoDBStringItem dynamoStringItem) {
                queryExpression.setExpressionAttributeValues(
                        ImmutableMap.of(":opstate", new AttributeValue().withS(dynamoStringItem.getState())));
            }

            @Override
            public void visit(DynamoDBBigDecimalItem dynamoBigDecimalItem) {
                queryExpression.setExpressionAttributeValues(ImmutableMap.of(":opstate",
                        new AttributeValue().withN(dynamoBigDecimalItem.getState().toPlainString())));
            }
        });

    }
}

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