net.jmatrix.db.jsql.model.RecentConnections Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jsql Show documentation

SQL Utilities including simple command line, schema management.

There is a newer version: 1.2.8

package net.jmatrix.db.jsql.model;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import net.jmatrix.db.common.ConnectionInfo;
import net.jmatrix.db.common.DotConfig;
import net.jmatrix.db.common.JSONUtil;

import com.fasterxml.jackson.annotation.JsonIgnore;



/**
 * A list of recent connections. 
 */
public class RecentConnections {
   static final String RECENT_CONNECTIONS="recent.connections.json";
   
   int number=20;
   
   List connections=new ArrayList();
   
   public RecentConnections() { }
   
   
   public void update(ConnectionInfo ci) {
      int index=connections.indexOf(ci);
      if (index != -1) {
         connections.set(index, ci);
      } else {
         connections.add(ci);
      }
      Collections.sort(connections);
      
      if (connections.size() > number) {
         connections.remove(connections.size()-1);
      }
   }
   
   public ConnectionInfo get(int i) {
      return connections.get(i);
   }
   
   @JsonIgnore
   public ConnectionInfo getMostRecent() {
      if (connections != null && connections.size() > 0) {
         return connections.get(0);
      }
      return null;
   }
   
   
   public static RecentConnections load(String app) throws IOException {
      DotConfig dc=new DotConfig(app);
      
      String s=dc.read(RECENT_CONNECTIONS);
      if (s == null || s.length() == 0) {
         RecentConnections rc=new RecentConnections();
         rc.save(app);
         return rc;
      } else {
         return JSONUtil.read(s, RecentConnections.class);
      }
   }
   
   public void save(String app) throws IOException {
      DotConfig dc=new DotConfig(app);
      
      dc.write(RECENT_CONNECTIONS, JSONUtil.write(this));
   }
   
   ////////////////////////////////////////////////////////////////////////////
   public int getNumber() {
      return number;
   }

   public void setNumber(int number) {
      this.number = number;
   }

   public List getConnections() {
      return connections;
   }

   public void setConnections(List connections) {
      this.connections = connections;
   }
}