bucket.java

一个简单的数据库

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package indexManager;

/**
 *
 * @author outlaw
 */
import java.util.ArrayList;
import java.io.*;

public class Bucket implements Serializable
{
	Comparable searchKey;
	public ArrayList<Integer> m_pointers;
	Object o;
	public Bucket(Comparable k, int blockID,int offset)
	{
		searchKey = k;
		m_pointers = new ArrayList();
		m_pointers.add(blockID);
		m_pointers.add(offset);
	}
	public Bucket(Comparable k, Object ob)
	{
		o = ob;
		searchKey = k;
		m_pointers = new ArrayList();
	}
        public ArrayList<Integer> getPointers()
        {
            return m_pointers;
        }
	public Comparable getSearchKey()
	{
		return searchKey;
	}
	public void addPointer(int[] n_pointer)
	{
		m_pointers.add(n_pointer[0]);
		m_pointers.add(n_pointer[1]);
	}
        @Override
        public String toString()
        {
            StringBuilder builder=new StringBuilder();
            builder.append("[");
            int i;
            for(i=0;i<m_pointers.size()-2;i+=2)
            {
                builder.append(""+m_pointers.get(i)+":"+m_pointers.get(i+1)+",");
            }
            builder.append(""+m_pointers.get(i)+":"+m_pointers.get(i+1)+"]");
            return builder.toString();
        }
}