Class ClassComparator
- All Implemented Interfaces:
Serializable
,Comparator
- Author:
- Thomas Morgner
- See Also:
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Constructor Summary
Constructors -
Method Summary
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface java.util.Comparator
equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong
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Constructor Details
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ClassComparator
public ClassComparator()Defaultconstructor.
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Method Details
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compare
Compares its two arguments for order. Returns a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.Note: throws ClassCastException if the arguments' types prevent them from being compared by this Comparator. And IllegalArgumentException if the classes share no relation. The implementor must ensure that sgn(compare(x, y)) == -sgn(compare(y, x)) for all x and y. (This implies that compare(x, y) must throw an exception if and only if compare(y, x) throws an exception.)
The implementor must also ensure that the relation is transitive: ((compare(x, y)>0) && (compare(y, z)>0)) implies compare(x, z)>0.
Finally, the implementer must ensure that compare(x, y)==0 implies that sgn(compare(x, z))==sgn(compare(y, z)) for all z.
It is generally the case, but not strictly required that (compare(x, y)==0) == (x.equals(y)). Generally speaking, any comparator that violates this condition should clearly indicate this fact. The recommended language is "Note: this comparator imposes orderings that are inconsistent with equals."
- Specified by:
compare
in interfaceComparator
- Parameters:
o1
- the first object to be compared.o2
- the second object to be compared.- Returns:
- a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.
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isComparable
Checks, whether the given classes are comparable. This method will return true, if one of the classes is assignable from the other class.- Parameters:
c1
- the first class to comparec2
- the second class to compare- Returns:
- true, if the classes share a direct relation, false otherwise.
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