jremutils.java

来自「JRemoteControl is a simple Java&#8482 dr」· Java 代码 · 共 84 行

/*
 * JRemCntl - Copyright (C) 2007 Filippo Di Vattimo <[e-mail]>
 * See COPYING
 */

package fildiv.jremcntl.common.util;

import java.util.Vector;

import fildiv.jremcntl.common.core.Command;
import fildiv.jremcntl.common.core.Config;
import fildiv.jremcntl.common.core.Context;
import fildiv.jremcntl.common.core.JRemMobileKeys;

public class JRemUtils {
	
	public static boolean isEmptyString(String value) {
		return value == null || "".equals(value);
	}

	public static String safeString(String str) {
		
		if (str == null)
			return "";
		
		return str;
	}

	public static String safeLeft(String str, int chars) {
		
		String s = safeString(str);
		if ("".equals(s))
			return s;
		
		if (chars < 0)
			return s;
		
		if (chars > s.length())
			chars = s.length();
		
		return s.substring(0, chars);
		

	}

	private JRemUtils() {
		
	}
	
	public static String decodeViewType(short viewType) {
		
		String desc = "";
		
		switch(viewType) {
		case  Config.TYPE_VIEW_FASTVIEW:
		
			desc = "Fast View";
			break;

		case  Config.TYPE_VIEW_LISTVIEW:
			
			desc = "List View";
			break;
		}
		
		return desc;
		
	}
	
	public static boolean hasKeysAssigned(Context ctx) {

		Vector commands = ctx.getCommands();
		
		for(int index = 0; index < commands.size(); ++index) {
			Command c = (Command) commands.elementAt(index);
			
			if (c.getKey() != null && !c.getKey().equals(JRemMobileKeys.KEY_NONE))
				return true;
		}
		
		return false;
	}	
}