Android Open Source - Android-Exif Rational

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright (C) 2012 The Android Open Source Project
 *//from  w  w w.  j  av  a2  s .co  m
 * 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 com.ai.exif;

/**
 * The rational data type of EXIF tag. Contains a pair of longs representing the
 * numerator and denominator of a Rational number.
 * <p>
 * Copy from and com.android.camera.exif
 * 
 * @author leo
 */
public class Rational {

  private final long mNumerator;
  private final long mDenominator;

  /**
   * Create a Rational with a given numerator and denominator.
   * 
   * @param nominator
   * @param denominator
   */
  public Rational(long nominator, long denominator) {
    mNumerator = nominator;
    mDenominator = denominator;
  }

  /**
   * Create a copy of a Rational.
   */
  public Rational(Rational r) {
    mNumerator = r.mNumerator;
    mDenominator = r.mDenominator;
  }

  /**
   * Gets the numerator of the rational.
   */
  public long getNumerator() {
    return mNumerator;
  }

  /**
   * Gets the denominator of the rational
   */
  public long getDenominator() {
    return mDenominator;
  }

  /**
   * Gets the rational value as type double. Will cause a divide-by-zero error
   * if the denominator is 0.
   */
  public double toDouble() {
    return mNumerator / (double) mDenominator;
  }

  @Override
  public boolean equals(Object obj) {
    if (obj == null) {
      return false;
    }
    if (this == obj) {
      return true;
    }
    if (obj instanceof Rational) {
      Rational data = (Rational) obj;
      return mNumerator == data.mNumerator && mDenominator == data.mDenominator;
    }
    return false;
  }

  @Override
  public String toString() {
    return mNumerator + "/" + mDenominator;
  }
}

Java Source Code List

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