indexsearch.java

一个日本流行的,功能较全的开源Web办公管理(Groupware)系统。

package jp.co.sjts.gsession.tools;


import java.io.File;
import java.io.BufferedReader;
import java.io.PrintWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Map;
import java.util.List;
import java.util.HashMap;
import java.util.Iterator;

/**
 * 僀儞僨僢僋僗婎杮僋儔僗  IndexSearch.java
 * Copyright (C) 1999-2000 Japan Total System Co,LTD
 *
 * @author   Satoru K   <[e-mail]>
 */
abstract public class IndexSearch
{
	private File dir;

	abstract protected String charTrans(char c);


	public IndexSearch(File dir)
	{
		this.dir = dir;
	}

	public IndexSearch(String dir)
	{
		this.dir = new File(dir);
	}

	/**
	 * 懚嵼偡傞僀儞僨僢僋僗偺儅僢僾傪庢摼偡傞
	 *
	 * @return      懚嵼偡傞Index(hashcode)
	 */
	public Map getIndex()
	{
		if(!dir.exists())
			dir.mkdirs();
		if(!dir.isDirectory())
			return null;

		String[] filesName = dir.list(new FileFileFilter());
		Map nummap=new HashMap(filesName.length);

		for(int i=0;i<filesName.length;i++)
		{
			try {
				nummap.put(new Integer(filesName[i]),new Integer(filesName[i]));
			}catch(NumberFormatException e){
				return null;
			}
		}

		return nummap;
	}

	/**
	 * 奩摉偡傞儐乕僓ID偺儕僗僩傪庢摼偡傞
	 * 
	 * @param   index     僼傽僀儖柤(hashcode)
	 * @return          奩摉偡傞儐乕僓ID
	 */
	public List getIDs(int index) throws GSException
	{
		if(index<0)
			return null;

		File file = new File(dir,Integer.toString(index));

		if( (!file.exists())||(!file.isFile()))
			return null;

		String buf;
		List list = new ArrayList();
		BufferedReader br = GSTextFile2.OpenLoad(file);

		try {
			for(buf=br.readLine();buf!=null;buf=br.readLine())
				list.add(new Integer(buf));
			br.close();
		} catch(IOException e) {
			throw new GSException("IO僄儔乕偱偡",e);
		}

		return list;
	}

	/**
	 * 儐乕僓傪僀儞僨僢僋僗傊捛壛偟傑偡
	 *
	 * @param   uid        捛壛偡傞儐乕僓ID
	 * @param   idxStr     僀儞僨僢僋僗偵偡傞暥帤(愭摢1暥帤栚偑僀儞僨僢僋僗偲側傞)
	 * @return  僀儞僨僢僋僗偺僴僢僔儏僐乕僪
	 */
	public String addIdx(int uid,String idxStr) throws GSException
	{
		// 僨傿儗僋僩儕偑側偄応崌偼丄嶌惉偡傞
		if(!dir.exists())
			dir.mkdirs();

		String one=" ";
		if( (idxStr!=null)&&(idxStr.length()>0) )
			one = charTrans(idxStr.charAt(0));
		else
			one = charTrans('#');

		String hash = Integer.toString(one.hashCode());
		File file = new File(dir,hash);
		List list=null;

		if( (file.exists())&&(file.isFile()))
			list = getIDs(one.hashCode());

		if(list==null)
			list = new ArrayList();

		list.add(new Integer(uid));

		PrintWriter pw = GSTextFile2.OpenSave(file);
		Iterator it = list.iterator();
		while(it.hasNext())
		{
			Integer i = (Integer)it.next();
			pw.println(i.toString());
		}
		pw.flush();
		pw.close();

		return hash;
	}

	/**
	 * 儐乕僓傪僀儞僨僢僋僗偐傜嶍彍偟傑偡
	 *
	 * @param   uid        嶍彍偡傞儐乕僓ID
	 * @param   idxStr     僀儞僨僢僋僗偵偡傞暥帤(愭摢1暥帤栚偑僀儞僨僢僋僗偲側傞)
	 */
	public void delIdx(int uid,String idxStr) throws GSException
	{
		String one;
		if( (idxStr!=null)&&(idxStr.length()>0) )
			one = charTrans(idxStr.charAt(0));
		else
			one = charTrans('#');

		File file = new File(dir,Integer.toString(one.hashCode()));
		List list=null;

		if( (file.exists())&&(file.isFile()))
			list = getIDs(one.hashCode());
		else
			return;

		list.remove(new Integer(uid));

		if(list.size()>0){
			PrintWriter pw = GSTextFile2.OpenSave(file);
			Iterator it = list.iterator();
			while(it.hasNext())
			{
				Integer i = (Integer)it.next();
				pw.println(i.toString());
			}
			pw.flush();
			pw.close();
		}else{
			file.delete();
		}
	}
}