sequencecomparator.java

java阿里巴巴代码

/**
 * SequenceComparator.java
 * 
 */
package tools.util;

import java.util.Comparator;

public class SequenceComparator implements Comparator
{
	private int takeEqual = 0;
	private boolean seq = true;

	public SequenceComparator()
	{
	}

	public SequenceComparator(boolean takeEqual)
	{
		this.takeEqual = (takeEqual==true)?1:0;
	}

	public SequenceComparator(boolean takeEqual, boolean seq)
	{
		this.takeEqual = (takeEqual==true)?1:0;
		this.seq = seq;
	}

	public int compare(Object o1, Object o2)
	{
		if (o1 instanceof String && o2 instanceof String)
			return compareString(o1, o2);
		else if (o1 instanceof Integer && o2 instanceof Integer)
			return compareInteger(o1, o2);
		else if (o1 instanceof java.util.Date && o2 instanceof java.util.Date)
			return compareDate(o1, o2);
		else
			return (seq)?1:-1;
	}

	public int compareString(Object o1, Object o2)
	{
		String str1 = (String)o1;
		String str2 = (String)o2;
		if(!str1.equals(str2))
			return (seq)?1:-1;

		return takeEqual;
	}

	public int compareInteger(Object o1, Object o2)
	{
		int int1 = ((Integer)o1).intValue();
		int int2 = ((Integer)o2).intValue();

		if(int1 != int2)
			return (seq)?1:-1;

		return takeEqual;
	}

	public int compareDate(Object o1, Object o2)
	{
		java.util.Date date1 = (java.util.Date)o1;
		java.util.Date date2 = (java.util.Date)o2;

		if(!date1.equals(date2))
			return (seq)?1:-1;

		return takeEqual;
	}
}