pakheader.java

j2me中制作Pak文件,来自www.matrix.org.cn

package cn.org.matrix.gmatrix.gameLab.util.pak;

/**
 * Pak文件头：
 * 结构：
 *   签名：6字节char数组
 *   版本号：32位float
 *   文件table数量：32位整数
 *   密码行为：8位字节
 *   密码：8位字节
 *   文件唯一ID：10字节char数组
 *   保留位：32位整数(4字节)
 * @author cleverpig
 *
 */
class PakHeader {
	//定义文件唯一ID长度
	public static final int UNIQUEID_LENGTH=10;
	//定义文件签名长度
	public static final int SIGNATURE_LENGTH=6;
	//定义加法运算
	public static final int ADDITION_CIPHERACTION=0;
	//定义减法运算
	public static final int SUBTRACT_CIHOERACTION=1;
	//文件签名
	private char[] signature=new char[SIGNATURE_LENGTH];
	//版本号
	private float version=0f;
	//文件table数量
	private long numFileTableEntries=0;
	//密码使用方法：在原数据上进行加法还是减法
	private byte cipherAction=ADDITION_CIPHERACTION;
	//密码值
	private byte cipherValue=0x00;
	//唯一ID
	private char[] uniqueID=new char[UNIQUEID_LENGTH];
	//保留的4字节
	private long reserved=0;
	
	public PakHeader(){	
	}
	
	/**
	 * 构造方法
	 * @param signature 签名
	 * @param version 版本
	 * @param numFileTableEntries 文件table数量
	 * @param cipherAction 密码使用方法
	 * @param cipherValue 密码值
	 * @param uniqueID 唯一ID
	 * @param reserved 保留的2字节
	 */
	public PakHeader(char[] signature,float version,
			long numFileTableEntries,byte cipherAction,
			byte cipherValue,char[] uniqueID,long reserved){
		for(int i=0;i<SIGNATURE_LENGTH;this.signature[i]=signature[i],i++)
			;
		this.version=version;
		this.cipherAction=cipherAction;
		this.numFileTableEntries=numFileTableEntries;
		this.cipherValue=cipherValue;
		for(int i=0;i<UNIQUEID_LENGTH;this.uniqueID[i]=uniqueID[i],i++)
			;
		
		this.reserved=reserved;
	}
	
	public byte getCipherValue() {
		return cipherValue;
	}
	public void setCipherValue(byte cipherValue) {
		this.cipherValue = cipherValue;
	}
	public long getNumFileTableEntries() {
		return numFileTableEntries;
	}
	public void setNumFileTableEntries(long numFileTableEntries) {
		this.numFileTableEntries = numFileTableEntries;
	}
	public long getReserved() {
		return reserved;
	}
	public void setReserved(long reserved) {
		this.reserved = reserved;
	}
	public char[] getUniqueID() {
		return uniqueID;
	}
	public void setUniqueID(char[] uniqueID) {
		for(int i=0;i<UNIQUEID_LENGTH;this.uniqueID[i]=uniqueID[i],i++)
			;
	}
	public float getVersion() {
		return version;
	}
	public void setVersion(float version) {
		this.version = version;
	}
	public byte getCipherAction() {
		return cipherAction;
	}

	public void setCipherAction(byte cipherAction) {
		this.cipherAction = cipherAction;
	}

	public char[] getSignature() {
		return signature;
	}

	public void setSignature(char[] signature) {
		for(int i=0;i<SIGNATURE_LENGTH;this.signature[i] = signature[i],i++)
			;
	}
	
	/**
	 * 返回PakHeader的大小
	 * @return 返回PakHeader的大小
	 */
	public static int size(){
		return SIGNATURE_LENGTH+4+4+1+1+UNIQUEID_LENGTH+4;
	}
	
	public String toString(){
		String result="";
		result+="\t签名:"+new String(this.signature).trim()
			+"\t版本号:"+this.version
			+"\t文件table数量:"+this.numFileTableEntries
			+"\t密码行为:" +this.cipherAction
			+"\t密码:"+this.cipherValue
			+"\t文件唯一ID:"+new String(this.uniqueID).trim()
			+"\t保留位:"+this.reserved;
		return result;
	}

}