czipentry.java

对eclipse gef进行封装,可以生成图形化编辑器

/*******************************************************************************
 * $Header: /cvsroot/EOS6/work_dir/niegy/com.primeton.studio.gef.ui/src/com/primeton/studio/gef/ui/zip/CZipEntry.java,v 1.1 2007/01/23 06:35:15 niegy Exp $
 * $Revision: 1.1 $
 * $Date: 2007/01/23 06:35:15 $
 *
 *==============================================================================
 *
 * Copyright (c) 2001-2006 Primeton Technologies, Ltd.
 * All rights reserved.
 * 
 * Created on 2007-1-23
 *******************************************************************************/


package com.primeton.studio.gef.ui.zip;

import java.util.Date;
import java.util.zip.ZipOutputStream;

/**
 * TODO 此处填写 class 信息
 *
 * @author niegy (mailto:[e-mail])
 */
/*
 * 修改历史
 * $Log: CZipEntry.java,v $
 * Revision 1.1  2007/01/23 06:35:15  niegy
 * 实现压缩功能，支持中文
 * 
 */
class CZipEntry implements CZipConstants,Cloneable {
	   String name;	// entry name
	    long time = -1;	// modification time (in DOS time)
	    long crc = -1;	// crc-32 of entry data
	    long size = -1;	// uncompressed size of entry data
	    long csize = -1;   	// compressed size of entry data
	    int method = -1;	// compression method
	    byte[] extra;	// optional extra field data for entry
	    String comment;	// optional comment string for entry
	    // The following flags are used only by Zip{Input,Output}Stream
	    int flag;		// bit flags
	    int version;	// version needed to extract
	    long offset;	// offset of loc header

	    /**
	     * Compression method for uncompressed entries.
	     */
	    public static final int STORED = 0;

	    /**
	     * Compression method for compressed (deflated) entries.
	     */
	    public static final int DEFLATED = 8; 
//	    static {
//	    	/* Zip library is loaded from System.initializeSystemClass */
//	    	initIDs();
//	        }
//
//	        private static native void initIDs();

	        /**
	         * Creates a new zip entry with the specified name.
	         *
	         * @param name the entry name
	         * @exception NullPointerException if the entry name is null
	         * @exception IllegalArgumentException if the entry name is longer than
	         *		  0xFFFF bytes
	         */
	        public CZipEntry(String name) {
	    	if (name == null) {
	    	    throw new NullPointerException();
	    	}
	    	if (name.length() > 0xFFFF) {
	    	    throw new IllegalArgumentException("entry name too long");
	    	}
	    	this.name = name;
	        }

	        /**
	         * Creates a new zip entry with fields taken from the specified
	         * zip entry.
	         * @param e a zip Entry object
	         */
	        public CZipEntry(CZipEntry e) {
	    	name = e.name;
	    	time = e.time;
	    	crc = e.crc;
	    	size = e.size;
	    	csize = e.csize;
	    	method = e.method;
	    	extra = e.extra;
	    	comment = e.comment;
	        }

	        /*
	         * Creates a new zip entry for the given name with fields initialized
	         * from the specified jzentry data.
	         */
	        CZipEntry(String name, long jzentry) {
	    	this.name = name;
	    	initFields(jzentry);
	        }

	        private native void initFields(long jzentry);

	        /*
	         * Creates a new zip entry with fields initialized from the specified
	         * jzentry data.
	         */
	        CZipEntry(long jzentry) {
	    	initFields(jzentry);
	        }

	        /**
	         * Returns the name of the entry.
	         * @return the name of the entry
	         */
	        public String getName() {
	    	return name;
	        }

	        /**
	         * Sets the modification time of the entry.
	         * @param time the entry modification time in number of milliseconds
	         *		   since the epoch
	         * @see #getTime()
	         */
	        public void setTime(long time) {
	    	this.time = javaToDosTime(time);
	        }

	        /**
	         * Returns the modification time of the entry, or -1 if not specified.
	         * @return the modification time of the entry, or -1 if not specified
	         * @see #setTime(long)
	         */
	        public long getTime() {
	    	return time != -1 ? dosToJavaTime(time) : -1;
	        }

	        /**
	         * Sets the uncompressed size of the entry data.
	         * @param size the uncompressed size in bytes
	         * @exception IllegalArgumentException if the specified size is less
	         *		  than 0 or greater than 0xFFFFFFFF bytes
	         * @see #getSize()
	         */
	        public void setSize(long size) {
	    	if (size < 0 || size > 0xFFFFFFFFL) {
	    	    throw new IllegalArgumentException("invalid entry size");
	    	}
	    	this.size = size;
	        }

	        /**
	         * Returns the uncompressed size of the entry data, or -1 if not known.
	         * @return the uncompressed size of the entry data, or -1 if not known
	         * @see #setSize(long)
	         */
	        public long getSize() {
	    	return size;
	        }

	        /**
	         * Returns the size of the compressed entry data, or -1 if not known.
	         * In the case of a stored entry, the compressed size will be the same
	         * as the uncompressed size of the entry.
	         * @return the size of the compressed entry data, or -1 if not known
	         * @see #setCompressedSize(long)
	         */
	        public long getCompressedSize() {
	    	return csize;
	        }

	        /**
	         * Sets the size of the compressed entry data.
	         * @param csize the compressed size to set to
	         * @see #getCompressedSize()
	         */
	        public void setCompressedSize(long csize) {
	    	this.csize = csize;
	        }

	        /**
	         * Sets the CRC-32 checksum of the uncompressed entry data.
	         * @param crc the CRC-32 value
	         * @exception IllegalArgumentException if the specified CRC-32 value is
	         *		  less than 0 or greater than 0xFFFFFFFF
	         * @see #setCrc(long)
	         */
	        public void setCrc(long crc) {
	    	if (crc < 0 || crc > 0xFFFFFFFFL) {
	    	    throw new IllegalArgumentException("invalid entry crc-32");
	    	}
	    	this.crc = crc;
	        }

	        /**
	         * Returns the CRC-32 checksum of the uncompressed entry data, or -1 if
	         * not known.
	         * @return the CRC-32 checksum of the uncompressed entry data, or -1 if
	         * not known
	         * @see #getCrc()
	         */
	        public long getCrc() {
	    	return crc;
	        }

	        /**
	         * Sets the compression method for the entry.
	         * @param method the compression method, either STORED or DEFLATED
	         * @exception IllegalArgumentException if the specified compression
	         *		  method is invalid
	         * @see #getMethod()
	         */
	        public void setMethod(int method) {
	    	if (method != STORED && method != DEFLATED) {
	    	    throw new IllegalArgumentException("invalid compression method");
	    	}
	    	this.method = method;
	        }

	        /**
	         * Returns the compression method of the entry, or -1 if not specified.
	         * @return the compression method of the entry, or -1 if not specified
	         * @see #setMethod(int)
	         */
	        public int getMethod() {
	    	return method;
	        }

	        /**
	         * Sets the optional extra field data for the entry.
	         * @param extra the extra field data bytes
	         * @exception IllegalArgumentException if the length of the specified
	         *		  extra field data is greater than 0xFFFF bytes
	         * @see #getExtra()
	         */
	        public void setExtra(byte[] extra) {
	    	if (extra != null && extra.length > 0xFFFF) {
	    	    throw new IllegalArgumentException("invalid extra field length");
	    	}
	    	this.extra = extra;
	        }

	        /**
	         * Returns the extra field data for the entry, or null if none.
	         * @return the extra field data for the entry, or null if none
	         * @see #setExtra(byte[])
	         */
	        public byte[] getExtra() {
	    	return extra;
	        }

	        /**
	         * Sets the optional comment string for the entry.
	         * @param comment the comment string
	         * @exception IllegalArgumentException if the length of the specified
	         *		  comment string is greater than 0xFFFF bytes
	         * @see #getComment()
	         */
	        public void setComment(String comment) {
	    	if (comment != null && comment.length() > 0xffff/3 
	                        && CZipOutputStream.getUTF8Length(comment) > 0xffff) {
	    	    throw new IllegalArgumentException("invalid entry comment length");
	    	}
	    	this.comment = comment;
	        }

	        /**
	         * Returns the comment string for the entry, or null if none.
	         * @return the comment string for the entry, or null if none
	         * @see #setComment(String)
	         */
	        public String getComment() {
	    	return comment;
	        }

	        /**
	         * Returns true if this is a directory entry. A directory entry is
	         * defined to be one whose name ends with a '/'.
	         * @return true if this is a directory entry
	         */
	        public boolean isDirectory() {
	    	return name.endsWith("/");
	        }

	        /**
	         * Returns a string representation of the ZIP entry.
	         */
	        public String toString() {
	    	return getName();
	        }

	        /*
	         * Converts DOS time to Java time (number of milliseconds since epoch).
	         */
	        private static long dosToJavaTime(long dtime) {
	    	Date d = new Date((int)(((dtime >> 25) & 0x7f) + 80),
	    			  (int)(((dtime >> 21) & 0x0f) - 1),
	    			  (int)((dtime >> 16) & 0x1f),
	    			  (int)((dtime >> 11) & 0x1f),
	    			  (int)((dtime >> 5) & 0x3f),
	    			  (int)((dtime << 1) & 0x3e));
	    	return d.getTime();
	        }

	        /*
	         * Converts Java time to DOS time.
	         */
	        private static long javaToDosTime(long time) {
	    	Date d = new Date(time);
	    	int year = d.getYear() + 1900;
	    	if (year < 1980) {
	    	    return (1 << 21) | (1 << 16);
	    	}
	    	return (year - 1980) << 25 | (d.getMonth() + 1) << 21 |
	                   d.getDate() << 16 | d.getHours() << 11 | d.getMinutes() << 5 |
	                   d.getSeconds() >> 1;
	        }

	        /**
	         * Returns the hash code value for this entry.
	         */
	        public int hashCode() {
	    	return name.hashCode();
	        }

	        /**
	         * Returns a copy of this entry.
	         */
	        public Object clone() {
	    	try {
	    	    CZipEntry e = (CZipEntry)super.clone();
	    	    e.extra = (extra == null ? null : (byte[])extra.clone());
	    	    return e;
	    	} catch (CloneNotSupportedException e) {
	    	    // This should never happen, since we are Cloneable
	    	    throw new InternalError();
	    	}
	        }
}