LongRational.java
/*
* Copyright 2020 The Android Open Source Project
*
* 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.
*/
package androidx.camera.core.impl.utils;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
/**
* The rational data type of EXIF tag. Contains a pair of longs representing the
* numerator and denominator of a Rational number.
*/
@RequiresApi(21) // TODO(b/200306659): Remove and replace with annotation on package-info.java
final class LongRational {
private final long mNumerator;
private final long mDenominator;
/**
* Create a Rational with a given numerator and denominator.
*/
LongRational(long nominator, long denominator) {
mNumerator = nominator;
mDenominator = denominator;
}
/**
* Creates a Rational from a double.
*/
LongRational(double value) {
this((long) (value * 10000), 10000);
}
/**
* Gets the numerator of the rational.
*/
long getNumerator() {
return mNumerator;
}
/**
* Gets the denominator of the rational
*/
long getDenominator() {
return mDenominator;
}
/**
* Gets the rational value as type double. Will cause a divide-by-zero error
* if the denominator is 0.
*/
double toDouble() {
return mNumerator / (double) mDenominator;
}
@NonNull
@Override
public String toString() {
return mNumerator + "/" + mDenominator;
}
}