/*
* Encog(tm) Core v3.4 - Java Version
* http://www.heatonresearch.com/encog/
* https://github.com/encog/encog-java-core
* Copyright 2008-2016 Heaton Research, Inc.
*
* 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.
*
* For more information on Heaton Research copyrights, licenses
* and trademarks visit:
* http://www.heatonresearch.com/copyright
*/
package org.encog.ml.data.versatile.normalizers.strategies;
import java.io.Serializable;
import org.encog.ml.data.MLData;
import org.encog.ml.data.versatile.columns.ColumnDefinition;
/**
* Defines the interface to a normalization strategy.
*/
public interface NormalizationStrategy extends Serializable {
/**
* Calculate how many elements a column will normalize into.
* @param colDef The column definition.
* @param isInput True, if this is an input column.
* @return The number of elements needed to normalize this column.
*/
int normalizedSize(ColumnDefinition colDef, boolean isInput);
/**
* Normalize a column, with a string input.
* @param colDef The column definition.
* @param isInput True, if this is an input column.
* @param value The value to normalize.
* @param outpuData The output data.
* @param outputColumn The element to begin outputing to.
* @return The new output element, advanced by the correct amount.
*/
int normalizeColumn(ColumnDefinition colDef, boolean isInput, String value,
double[] outpuData, int outputColumn);
/**
* Normalize a column, with a double input.
* @param colDef The column definition.
* @param isInput True, if this is an input column.
* @param output The output data.
* @param idx The element to begin outputing to.
* @return The new output element, advanced by the correct amount.
*/
String denormalizeColumn(ColumnDefinition colDef, boolean isInput, MLData output,
int idx);
/**
* Normalize a column, with a double value.
* @param colDef The column definition.
* @param isInput True, if this is an input column.
* @param value The value to normalize.
* @param outpuData The output data.
* @param outputColumn The element to begin outputing to.
* @return The new output element, advanced by the correct amount.
*/
int normalizeColumn(ColumnDefinition colDef, boolean isInput, double value,
double[] outpuData, int outputColumn);
}