bytedatautil.java

rmi C/S 客 户 端 与 服 务 端 连 接

package com.topking.rt.util;

import java.util.ArrayList;
import java.util.List;

import com.topking.rt.data.NewByteData;

public final class ByteDataUtil {

	public static List<NewByteData> getChangedByte(byte[] b_old,byte[] b_new){
		List<NewByteData> changedDataList = new ArrayList<NewByteData>();
		int minLength = b_old.length>b_new.length?b_new.length:b_old.length;
		for(int i=0;i<minLength;i++){
			if(b_old[i]!=b_new[i]){
				NewByteData data = new NewByteData();
				data.setData(b_new[i]);
				data.setIndex(i);
				changedDataList.add(data);
			}
		}
		
		if(b_new.length>b_old.length){
			int overLength = b_new.length-b_old.length;
			for(int j=0;j<overLength;j++){
				NewByteData data = new NewByteData();
				data.setData(b_new[j+minLength]);
				data.setIndex(j+minLength);
				changedDataList.add(data);
			}
		}
		return changedDataList;
	}
	
	public static byte[] getNewImageByte(byte[] old,List<NewByteData> changedData){
		byte[] newImageByteData = null;
		int maxIndex = changedData.get(changedData.size()-1).getIndex();
		int size = changedData.size();
		if(maxIndex<=old.length-1){
			newImageByteData = old;
			for(int i=0;i<size;i++){
				NewByteData newData = changedData.get(i);
				newImageByteData[newData.getIndex()] = newData.getData();
			}
		}else{
			newImageByteData = new byte[maxIndex+1];
			System.arraycopy(old,0,newImageByteData,0,old.length);//Copy the old data
			for(int i=0;i<size;i++){
				NewByteData newData = changedData.get(i);
				newImageByteData[newData.getIndex()] = newData.getData();
			}
		}
		return newImageByteData;
	}
}