Android Open Source - egotrip Metadata Manager

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License

The source code is released under:

Apache License

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Java Source Code

package net.myegotrip.egotrip.metadata;
//w w w .  j av a 2 s. c  om
import java.util.ArrayList;

import net.myegotrip.egotrip.DbTools;
import net.myegotrip.egotrip.LocationUpdate;
import android.content.Context;

public class MetadataManager {

  private static MetadataManager instance = null;

  private DbTools db;


  private MetadataManager(Context context) {
    db = DbTools.getDbTools(context);
  }

  public static MetadataManager getMetadataManager(Context context) {
    if (instance == null) {
      instance = new MetadataManager(context);
    }
    return instance;
  }

  /**
   * attach new metadata to a location
   * 
   * @param l
   *            LocationUpdate, must be in the database or an exception will
   *            be thrown
   * @param m
   *            new Metadata Object, should not be in the database yet
   */
  public void attachMetadata(LocationUpdate l, EgotripMetadata m) {
    db.insertMetadata(l,m);
  }

  
  public void deleteMetadata(EgotripMetadata m){
    db.markDeleted(m);
  }
  
  
  /**
   * returns all metadata of this LocationUpdate
   * 
   * @param l
   * @return
   */
  public ArrayList<EgotripMetadata> getMetadata(LocationUpdate l) {
    return getMetadata(l, null);
  }

  /**
   * return metadata of certain type
   * 
   * @param l
   * @param type
   * @return
   */
  public ArrayList<EgotripMetadata> getMetadata(LocationUpdate l, String type) {
    String and="";
    if(type!=null){
      and=" AND metadatatype='"+type+"'";
    }
    return db.getMetadata("locationid = "+l.getLocalID()+and);
  }

  // helper functions for known metadata types

  /**
   * return the first text attachment (since we probably only have one)
   * returns null if there is no Text attached
   */
  public Text getTextMetadata(LocationUpdate l) {
    ArrayList<EgotripMetadata> meta = getMetadata(l, EgotripMetadata.TEXT);
    if (meta.size() > 0) {
      return (Text) meta.get(0);
    }
    return null;
  }

  /**
   * return first image metadata (since we probably only have one)
   * 
   * @param l
   * @return Image or null
   */
  public Image getImageMetadata(LocationUpdate l) {
    ArrayList<EgotripMetadata> meta = getMetadata(l, EgotripMetadata.IMAGE);
    if (meta.size() > 0) {
      return (Image) meta.get(0);
    }
    return null;
  }

  /**
   * return first image metadata (since we probably only have one)
   * 
   * @param l
   * @return Image or null
   */
  public Icon getIconMetadata(LocationUpdate l) {
    ArrayList<EgotripMetadata> meta = getMetadata(l, EgotripMetadata.ICON);
    if (meta.size() > 0) {
      if (meta.get(0) instanceof Icon)return (Icon) meta.get(0);
    }
    return null;
  }

}

Java Source Code List