com.datastax.driver.core.ProtocolFeature Maven / Gradle / Ivy
/*
* Copyright DataStax, Inc.
*
* This software can be used solely with DataStax Enterprise. Please consult the license at
* http://www.datastax.com/terms/datastax-dse-driver-license-terms
*/
package com.datastax.driver.core;
/** A listing of features that may or not apply to a given {@link ProtocolVersion}. */
enum ProtocolFeature {
/** The capability of setting keyspace on a per-query basis. */
KEYSPACE_ON_QUERY,
/**
* The capability of updating a prepared statement if the result's metadata changes at runtime
* (for example, if the query is a {@code SELECT *} and the table is altered).
*/
PREPARED_METADATA_CHANGES,
/** The capability of sending or receiving custom payloads. */
CUSTOM_PAYLOADS,
/** The capability of assigning client-generated timestamps to write requests. */
CLIENT_TIMESTAMPS,
//
;
/**
* Determines whether or not the input version supports ths feature.
*
* @param version the version to test against.
* @return true if supported, false otherwise.
*/
boolean isSupportedBy(ProtocolVersion version) {
switch (this) {
case KEYSPACE_ON_QUERY:
return version == ProtocolVersion.V5 || version == ProtocolVersion.DSE_V2;
case PREPARED_METADATA_CHANGES:
return version == ProtocolVersion.V5 || version == ProtocolVersion.DSE_V2;
case CUSTOM_PAYLOADS:
return version.compareTo(ProtocolVersion.V4) >= 0;
case CLIENT_TIMESTAMPS:
return version.compareTo(ProtocolVersion.V3) >= 0;
default:
return false;
}
}
}