org.nd4j.linalg.indexing.functions.StableNumber Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://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.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.nd4j.linalg.indexing.functions;
import org.nd4j.linalg.factory.Nd4j;
import org.nd4j.linalg.function.Function;
/**
* Returns a stable number based on infinity
* or nan
*/
public class StableNumber implements Function {
private Type type;
public enum Type {
DOUBLE, FLOAT
}
public StableNumber(Type type) {
this.type = type;
}
@Override
public Number apply(Number number) {
switch (type) {
case DOUBLE:
if (Double.isInfinite(number.doubleValue()))
return -Double.MAX_VALUE;
if (Double.isNaN(number.doubleValue()))
return Nd4j.EPS_THRESHOLD;
case FLOAT:
if (Float.isInfinite(number.floatValue()))
return -Float.MAX_VALUE;
if (Float.isNaN(number.floatValue()))
return Nd4j.EPS_THRESHOLD;
default:
throw new IllegalStateException("Illegal opType");
}
}
}