zipentryfileproxy.java

《SWING HACKS》源码 作者: Joshua Marinacci,Chris Adamson 著 徐晔 译 出版: 2007年2月

import java.util.*;
import java.util.zip.*;
import java.io.*;
import java.net.*;

public class ZipEntryFileProxy extends DebugFile {
    ZipFileProxy zip;
    ZipFile zipfile;
    String name, path;
    File parent;
    ZipEntry entry;
    
    public ZipEntryFileProxy(ZipFileProxy zip, ZipFile zipfile, String path, File parent) {
        super("");
        this.zip = zip;
        this.zipfile = zipfile;
        this.path = path;
        this.parent = parent;
        this.entry = zipfile.getEntry(path);

        // determine if the entry is a directory
        String tmp = path;
        
        if(entry.isDirectory()) {
            tmp = path.substring(0,path.length()-1);
        }
        
        // then calculate the name
        int brk = tmp.lastIndexOf("/");
        name = path;
        if(brk != -1) {
            name = tmp.substring(brk+1);
        }
    }
    
    public boolean exists() { return true; }
    
    public int hashCode() {
        return name.hashCode() ^ 1234321;
    }
    
    public String getName() { return name; }
    public String getPath() { return path; }
    public boolean isDirectory() { return entry.isDirectory(); }
    public boolean isAbsolute() { return true; }
    public String getAbsolutePath() { return path; }
    public File getAbsoluteFile() { return this; }
    public File getCanonicalFile() { return this; }
    public File getParentFile() { return parent; }
    
    public boolean equals(Object obj) {
        if(obj instanceof ZipEntryFileProxy) {
            ZipEntryFileProxy zo = (ZipEntryFileProxy)obj;
            if(zo.getAbsolutePath().equals(getAbsolutePath())) {
                return true;
            }
        }
        return false;
    }
    
    public File[] listFiles() {
        Map children = (Map)zip.hash.get(path);
        File[] files = new File[children.size()];
        Iterator it = children.keySet().iterator();
        int count = 0;
        while(it.hasNext()) {
            String name = (String)it.next();
            files[count] = new ZipEntryFileProxy(zip, zipfile, name,this);
            count++;
        }
        return files;
    }
    
    public InputStream getInputStream() throws IOException {
        return zipfile.getInputStream(entry);
    }

}