Polypheny JDBC Driver - Result

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getResultType
unwrap

The Result object in the Polypheny JDBC Multimodel Extension encapsulates the outcome of queries executed using the PolyStatement object. It serves as a wrapper for different types of results such as RelationalResult, DocumentResult, GraphResult, and ScalarResult.

`getResultType`

public ResultType getResultType()

Returns the type of the encapsulated result.

Return Type:

Returns one of the following ResultType constants: Result.RELATIONAL, Result.DOCUMENT, Result.GRAPH, Result.SCALAR.

Usage:

ResultType type = result.getResultType();

`unwrap`

public <T> T unwrap(Class<T> aClass) throws ProtoInterfaceServiceException

Unwraps the encapsulated result to its specific type, based on the type parameter passed to the unwrap method.

Parameters:

Parameter	Type	Description
`aClass`	`Class<T>`	The class to which the result should be unwrapped.

Return Type:

Returns an instance of the specified class.

Exceptions:

Throws a ProtoInterfaceServiceException if the result cannot be unwrapped to the specified class type.

Result Types:

Result Type	Unwrap To	Description
`Result.RELATIONAL`	`RelationalResult.class`	The result contains relational data and can be unwrapped to a `RelationalResult` object.
`Result.DOCUMENT`	`DocumentResult.class`	The result contains document-based data and can be unwrapped to a `DocumentResult` object.
`Result.GRAPH`	`GraphResult.class`	The result contains graph-based data and can be unwrapped to a `GraphResult` object.
`Result.SCALAR`	`ScalarResult.class`	The result contains scalar values and can be unwrapped to a `ScalarResult` object.

Usage:

try {
    switch (result.getResultType()) {
        case Result.RELATIONAL:
            RelationalResult relationalResult = result.unwrap(RelationalResult.class);
            // Process the relational result...
            break;

        case Result.DOCUMENT:
            DocumentResult documentResult = result.unwrap(DocumentResult.class);
            // Process the document result...
            break;

        case Result.GRAPH:
            GraphResult graphResult = result.unwrap(GraphResult.class);
            // Process the graph result...
            break;

        case Result.SCALAR:
            ScalarResult scalarResult = result.unwrap(ScalarResult.class);
            // Process the scalar result...
            break;

        default:
            // Handle other types...
    }
} catch (ProtoInterfaceServiceException e) {
    e.printStackTrace();
}

PolyStatement

Java

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Polypheny JDBC Driver - Result

getResultType

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`getResultType`

`unwrap`