org.nd4j.linalg.indexing.functions.StableNumber Maven / Gradle / Ivy
/*
* ******************************************************************************
* *
* *
* * 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.
* *
* * See the NOTICE file distributed with this work for additional
* * information regarding copyright ownership.
* * 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.common.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");
}
}
}