1e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka/* 2e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * Copyright (C) 2012 The Android Open Source Project 3e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * 4e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * Licensed under the Apache License, Version 2.0 (the "License"); 5e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * you may not use this file except in compliance with the License. 6e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * You may obtain a copy of the License at 7e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * 8e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * http://www.apache.org/licenses/LICENSE-2.0 9e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * 10e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * Unless required by applicable law or agreed to in writing, software 11e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * distributed under the License is distributed on an "AS IS" BASIS, 12e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * See the License for the specific language governing permissions and 14e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * limitations under the License. 15e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka */ 16e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 17e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkapackage com.android.gallery3d.exif; 18e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 19e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka/** 20e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * The rational data type of EXIF tag. Contains a pair of longs representing the 21e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * numerator and denominator of a Rational number. 22e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka */ 23e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkapublic class Rational { 24e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 25e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka private final long mNumerator; 26e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka private final long mDenominator; 27e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 28e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka /** 29e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * Create a Rational with a given numerator and denominator. 30e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * 31e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * @param nominator 32e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * @param denominator 33e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka */ 34e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public Rational(long nominator, long denominator) { 35e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka mNumerator = nominator; 36e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka mDenominator = denominator; 37e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 38e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 39e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka /** 40e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * Create a copy of a Rational. 41e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka */ 42e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public Rational(Rational r) { 43e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka mNumerator = r.mNumerator; 44e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka mDenominator = r.mDenominator; 45e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 46e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 47e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka /** 48e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * Gets the numerator of the rational. 49e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka */ 50e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public long getNumerator() { 51e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return mNumerator; 52e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 53e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 54e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka /** 55e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * Gets the denominator of the rational 56e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka */ 57e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public long getDenominator() { 58e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return mDenominator; 59e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 60e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 61e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka /** 62e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * Gets the rational value as type double. Will cause a divide-by-zero error 63e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * if the denominator is 0. 64e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka */ 65e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public double toDouble() { 66e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return mNumerator / (double) mDenominator; 67e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 68e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 69e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka @Override 70e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public boolean equals(Object obj) { 71e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (obj == null) { 72e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return false; 73e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 74e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (this == obj) { 75e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return true; 76e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 77e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (obj instanceof Rational) { 78e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Rational data = (Rational) obj; 79e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return mNumerator == data.mNumerator && mDenominator == data.mDenominator; 80e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 81e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return false; 82e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 83e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 84e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka @Override 85e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public String toString() { 86e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return mNumerator + "/" + mDenominator; 87e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 88e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka} 89