collationkeycomparator.java

java 的源代码

package com.reddragon2046.base.utilities.data.predicates;

import java.text.CollationKey;
import java.text.Collator;
import java.util.Comparator;

public final class CollationKeyComparator
    implements Comparator
{

    public CollationKeyComparator()
    {
        this(Collator.getInstance());
    }

    public CollationKeyComparator(Collator collator)
    {
        this.collator = collator;
    }

    public int compare(Object first, Object second)
    {
        return asKey(first).compareTo(asKey(second));
    }

    CollationKey asKey(Object object)
    {
        return (object instanceof CollationKey) ? (CollationKey)object : collator.getCollationKey(object.toString());
    }

    private Collator collator;
}