Source: eclairjs/ml/PipelineStage.js

/*                                                                         
* 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.                                           
*/ 

(function () {

    var JavaWrapper = require(EclairJS_Globals.NAMESPACE + '/JavaWrapper');
    var Logger = require(EclairJS_Globals.NAMESPACE + '/Logger');
    var Utils = require(EclairJS_Globals.NAMESPACE + '/Utils');

    
    
    /**
     * @classdesc
     * A stage in a pipeline, either an Estimator or a Transformer.
     * @class
     * @memberof module:eclairjs/ml
     */
    var PipelineStage = function(jvmObject) {
        this.logger = Logger.getLogger("ml.PipelineStage_js");
        JavaWrapper.call(this, jvmObject);
    
    };

    PipelineStage.prototype = Object.create(JavaWrapper.prototype);

    PipelineStage.prototype.constructor = PipelineStage;
    
    
    /**
     * @abstract
     * @param {module:eclairjs/ml/param.ParamMap} extra
     * @returns {module:eclairjs/ml.PipelineStage}
     */
    PipelineStage.prototype.copy = function(extra) {
       var extra_uw = Utils.unwrapObject(extra);
       var javaObject =  this.getJavaObject().copy(extra_uw);
       return Utils.javaToJs(javaObject);
    };
    
    
    /**
     * 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 schema_uw = Utils.unwrapObject(schema);
       var javaObject =  this.getJavaObject().transformSchema(schema_uw);
       return Utils.javaToJs(javaObject);
    };
    

    
    module.exports = PipelineStage;
})();