org.deeplearning4j.optimize.stepfunctions.StepFunctions Maven / Gradle / Ivy
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* * terms of the Apache License, Version 2.0 which is available at
* * https://www.apache.org/licenses/LICENSE-2.0.
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package org.deeplearning4j.optimize.stepfunctions;
import org.deeplearning4j.optimize.api.StepFunction;
public class StepFunctions {
private static final DefaultStepFunction DEFAULT_STEP_FUNCTION_INSTANCE = new DefaultStepFunction();
private static final GradientStepFunction GRADIENT_STEP_FUNCTION_INSTANCE = new GradientStepFunction();
private static final NegativeDefaultStepFunction NEGATIVE_DEFAULT_STEP_FUNCTION_INSTANCE =
new NegativeDefaultStepFunction();
private static final NegativeGradientStepFunction NEGATIVE_GRADIENT_STEP_FUNCTION_INSTANCE =
new NegativeGradientStepFunction();
private StepFunctions() {}
public static StepFunction createStepFunction(org.deeplearning4j.nn.conf.stepfunctions.StepFunction stepFunction) {
if (stepFunction == null)
return null;
if (stepFunction instanceof org.deeplearning4j.nn.conf.stepfunctions.DefaultStepFunction)
return DEFAULT_STEP_FUNCTION_INSTANCE;
if (stepFunction instanceof org.deeplearning4j.nn.conf.stepfunctions.GradientStepFunction)
return GRADIENT_STEP_FUNCTION_INSTANCE;
if (stepFunction instanceof org.deeplearning4j.nn.conf.stepfunctions.NegativeDefaultStepFunction)
return NEGATIVE_DEFAULT_STEP_FUNCTION_INSTANCE;
if (stepFunction instanceof org.deeplearning4j.nn.conf.stepfunctions.NegativeGradientStepFunction)
return NEGATIVE_GRADIENT_STEP_FUNCTION_INSTANCE;
throw new RuntimeException("unknown step function: " + stepFunction);
}
}