defaultsavorandloader.java

一个用于搜索本地文件内容的小型搜索引擎

package invertedList;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Map;
import java.util.Set;

/**
 * @author Administrator
 *	an default implementation of AbstractSavorAndLoader
 */
public class DefaultSavorAndLoader extends AbstractSavorAndLoader {
	public DefaultSavorAndLoader(Map<String,Set<String>> allInvertedList,Set<File> fileList){
		this.allInvertedList = allInvertedList;
		this.fileList = fileList;
	}
	

	

	/* (non-Javadoc)
	 * @see invertedList.AbstractSavorAndLoader#loadInvertedList(java.lang.String)
	 */
	/** 
	 * @see invertedList.AbstractSavorAndLoader#saveInvertedList(java.lang.String)
	 * extend from AbstractSavorAndLoader
	 */
	@SuppressWarnings("unchecked")
	@Override
	protected void loadInvertedList(String dir) {
		try {
			ObjectInputStream ois = new ObjectInputStream(new FileInputStream(new File(dir + "/AllIndex.xbq")));
			allInvertedList = (Map<String,Set<String>>)ois.readObject();
			ois.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			System.out.println("Loading Failed. File can not be found.");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			System.out.println("Loading Failed. File can not be read.");
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}


	/* (non-Javadoc)
	 * @see invertedList.AbstractSavorAndLoader#saveInvertedList(java.lang.String)
	 */
	/** 
	 * @see invertedList.AbstractSavorAndLoader#saveInvertedList(java.lang.String)
	 * extend from AbstractSavorAndLoader
	 */
	@Override
	protected void saveInvertedList(String dir) {
		try {
			ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(new File(dir + "/AllIndex.xbq")));
			oos.writeObject(allInvertedList);
			oos.flush();
			oos.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			System.out.println("Saving Failed, the all index file can not be created.");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			System.out.println("Saving Failed, the all index file can not be written.");
		}
	}
	/*
	private void saveFileList(String dir){
		try {			
			ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(new File(dir + "/fileIndex.xbq")));
			oos.writeObject(fileList);
			oos.flush();
			oos.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			System.out.println("Saving Failed, file can not be created.");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			System.out.println("Saving Failed, file can not be written.");
		}
	}
*/
}