Application: gvSIG desktop

/**

 * 

 */

package org.gvsig.fmap.geom.jts.transform;

/**

 * Collected methods which allow easy implementation of <code>equals</code>.

 * Rewritten from http://www.javapractices.com/topic/TopicAction.do?Id=17.

 *

 * Example use case in a class called Car:

 * <pre>

public boolean equals(Object aThat){

  if ( this == aThat ) return true;

  if ( !(aThat instanceof Car) ) return false;

  Car that = (Car)aThat;

  return

    EqualsUtil.areEqual(this.name, that.name) &&

    EqualsUtil.areEqual(this.numDoors, that.numDoors) &&

    EqualsUtil.areEqual(this.gasMileage, that.gasMileage) &&

    EqualsUtil.areEqual(this.color, that.color) &&

    Arrays.equals(this.maintenanceChecks, that.maintenanceChecks); //array!

}

 * </pre>

 *

 * <em>Arrays are not handled by this class</em>.

 * This is because the <code>Arrays.equals</code> methods should be used for

 * array fields.

 */

public final class EqualUtils {

        static public boolean areEqual(boolean aThis, boolean aThat){

                //System.out.println("boolean");

                return aThis == aThat;

        }

        static public boolean areEqual(char aThis, char aThat){

                //System.out.println("char");

                return aThis == aThat;

        }

        static public boolean areEqual(long aThis, long aThat){

                /*

                 * Implementation Note

                 * Note that byte, short, and int are handled by this method, through

                 * implicit conversion.

                 */

                //System.out.println("long");

                return aThis == aThat;

        }

        static public boolean areEqual(float aThis, float aThat){

                //System.out.println("float");

                return Float.floatToIntBits(aThis) == Float.floatToIntBits(aThat);

        }

        static public boolean areEqual(double aThis, double aThat){

                //System.out.println("double");

                return Double.doubleToLongBits(aThis) == Double.doubleToLongBits(aThat);

        }

        /**

         * Possibly-null object field.

         *

         * Includes type-safe enumerations and collections, but does not include

         * arrays. See class comment.

         */

        static public boolean areEqual(Object aThis, Object aThat){

                //System.out.println("Object");

                return aThis == null ? aThat == null : aThis.equals(aThat);

        }

}