/*
* Copyright 2016 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
module.exports = function(kernelP) {
return (function() {
var Utils = require('../utils.js');
var gKernelP = kernelP;
/**
* @classdesc
* A stage in a pipeline, either an Estimator or a Transformer.
* @class
* @memberof module:eclairjs/ml
*/
function PipelineStage() {
Utils.handleConstructor(this, arguments, gKernelP);
}
/**
* @abstract
* @param {module:eclairjs/ml/param.ParamMap} extra
* @returns {module:eclairjs/ml.PipelineStage}
*/
PipelineStage.prototype.copy = function(extra) {
var args = {
target: this,
method: 'copy',
args: Utils.wrapArguments(arguments),
returnType: PipelineStage
};
return Utils.generate(args);
};
/***
* Check transform validity and derive the output schema from the input schema.
*
* Typical implementation should first conduct verification on schema change and parameter
* validity, including complex parameter interaction checks.
* @param {module:eclairjs/sql/types.StructType} schema
* @returns {module:eclairjs/sql/types.StructType}
*/
PipelineStage.prototype.transformSchema = function(schema) {
var StructType = require('../sql/types/StructType')();
var args = {
target: this,
method: 'transformSchema',
args: Utils.wrapArguments(arguments),
returnType: StructType
};
return Utils.generate(args);
};
PipelineStage.moduleLocation = '/ml/PipelineStage';
return PipelineStage;
})();
};