codesetelementcomparator.java

一个实用工具类

/*
 * Copyright (C) butor.com. All rights reserved.
 *
 * This software is published under the terms of the GNU Library General
 * Public License (GNU LGPL), a copy of which has been included with this
 * distribution in the LICENSE.txt file. 
 */


package org.butor.codeSet.lowlevel;

/**
 * ----------------------------------------------------------------
 * 2000/12/11,AS: Creation
 * 2001/07/17,AS: Added field f_locale to compare strings by locale.
 *						The locale is determined in setLanguage().
 */
 
import org.butor.comparator.IComparator;
import org.butor.comparator.SortComparator;
import org.butor.comparator.SortElement;
import org.butor.comparator.StringComparator;

import java.util.Locale;

/**
 * Used to compare two CodeTableElement for sort
 * 
 * @author Aiman Sawan
 */
public class CodeSetElementComparator extends SortComparator {
	public static final int ELEMENT_ID = 0;
	public static final int ELEMENT_SHORT_DESC = 1;
	public static final int ELEMENT_LONG_DESC = 2;

	protected int f_field = ELEMENT_LONG_DESC;
	protected Locale f_locale = Locale.ENGLISH;
/**
 * compareElements method comment.
 */
public int compareElements(Object o1, Object o2) {
	CodeSetElement e1 = (CodeSetElement)o1; 
	CodeSetElement e2 = (CodeSetElement)o2;

	String s1;
	String s2;
	
	switch (f_field) {
		case ELEMENT_ID: {
			s1 = e1.getCode();
			s2 = e2.getCode();
		} case ELEMENT_SHORT_DESC: {
			s1 = e1.getShortDesc(f_locale);
			s2 = e2.getShortDesc(f_locale);
		} default: {
			s1 = e1.getLongDesc(f_locale);
			s2 = e2.getLongDesc(f_locale);
		}
	}
	
	StringComparator stringComparator = new StringComparator(f_locale);
	stringComparator.setOrder(f_order);

	return stringComparator.compare(new SortElement(0, s1), new SortElement(1, s2));
}
/**
 * CodeTableElementComparator constructor comment.
 * @param order int
 */
public CodeSetElementComparator(int order) {
	super(order);
	setCompareField(ELEMENT_LONG_DESC);
}
/**
 * Insert the method's description here.
 * Creation date: (12/08/2000 %r)
 * @param colName java.lang.String
 */
public void setCompareField(int field) {
	f_field = field;
}
/**
 * Insert the method's description here.
 * Creation date: (12/08/2000 %r)
 * @param colName java.lang.String
 */
public void setLocale(Locale locale) {
	f_locale = locale;
}
/**
 * CodeTableElementComparator constructor comment.
 */
public CodeSetElementComparator() {
	super(IComparator.SORT_DESC);
}
}