package org.jaudiotagger.utils;
/**
* Collected methods which allow easy implementation of <code>equals</code>.
* <p/>
* 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.fName, that.fName) &&
* EqualsUtil.areEqual(this.fNumDoors, that.fNumDoors) &&
* EqualsUtil.areEqual(this.fGasMileage, that.fGasMileage) &&
* EqualsUtil.areEqual(this.fColor, that.fColor) &&
* Arrays.equals(this.fMaintenanceChecks, that.fMaintenanceChecks); //array!
* }
* </pre>
* <p/>
* <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 EqualsUtil {
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.
* <p/>
* 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);
}
}