Android Open Source - NFCAndroid Record

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License

The source code is released under:

Copyright (c) 2012, Wireless Sensor Technologies, Inc. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following ...

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Java Source Code

package com.gototags.nfc.records;
/*from  ww  w . j a  v a2 s . c om*/
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collections;

import com.google.common.base.Preconditions;

import android.nfc.NdefMessage;
import android.nfc.NdefRecord;

public abstract class Record {  
  protected abstract NdefRecord toNdefRecord();
  
  public NdefRecord getNdefRecord() {
    this.Validate();
    
    return this.toNdefRecord();
  }
  
  public void Validate() {
  }
  
  public RecordType getRecordType() {
    return Record.getRecordType(this.getClass());
  }
  
  public static Record[] fromNdefMessage(NdefMessage ndefMessage) {
    ArrayList<Record> records = new ArrayList<Record>();
    
    for (NdefRecord ndefRecord : ndefMessage.getRecords()) {
      Record record = Record.lookupFromNdefRecord(ndefRecord);
      
      if (record != null) {
        records.add(record);
      }
    }
    
    return records.toArray(new Record[records.size()]);
  }
  
  public static Record lookupFromNdefRecord(NdefRecord ndefRecord) {
    if (ndefRecord != null) {
      for (RecordType recordType : Record.RecordTypes) {
        NdefRecordParser ndefRecordParser = recordType.getNdefRecordParser();
        Preconditions.checkNotNull(ndefRecordParser);
        
        if (ndefRecordParser.isRecordType(ndefRecord)) {
          Record record = ndefRecordParser.fromNdefRecord(ndefRecord);
          Preconditions.checkNotNull(record);
          
          return record;
        }
      }
    }
    
    return null;
  }
  
  private static ArrayList<RecordType> RecordTypes = new ArrayList<RecordType>();

  public static void registerRecordType(RecordType recordType) {  
    Record.RecordTypes.add(recordType);
    
    Collections.sort(Record.RecordTypes);
  }
  
  public static void unregisterRecordType(Type type) {
    for (Integer i = 0; i < Record.RecordTypes.size(); i++) {
      RecordType recordType = Record.RecordTypes.get(i);
      
      if (recordType.getType().equals(type)) {
        Record.RecordTypes.remove(i);
        break;
      }
    }
  }
  
  public static void unregisterAllRecordTypes() {
    Record.RecordTypes.clear();
  }
  
  public static ArrayList<RecordType> getRecordTypes() {
    return Record.RecordTypes;
  }
  
  public static RecordType getRecordType(Type type) {
    for (RecordType recordType : Record.RecordTypes) {
      if (recordType.getType().equals(type))
        return recordType;
    }
    return null;
  }
  
  static {
    Record.registerRecordType(new RecordType("Text", TextRecord.class, 1, new NdefRecordParser(){
      public Record fromNdefRecord(NdefRecord ndefRecord) {
        return TextRecord.fromNdefRecord(ndefRecord);
      }

      public boolean isRecordType(NdefRecord ndefRecord) {
        return TextRecord.isTextRecord(ndefRecord);
      }
    }));
    
    Record.registerRecordType(new RecordType("Phone", PhoneRecord.class, 1, new NdefRecordParser(){
      public Record fromNdefRecord(NdefRecord ndefRecord) {
        return PhoneRecord.fromNdefRecord(ndefRecord);
      }

      public boolean isRecordType(NdefRecord ndefRecord) {
        return PhoneRecord.isPhoneRecord(ndefRecord);
      }
    }));
    
    Record.registerRecordType(new RecordType("Website", WebsiteRecord.class, 1, new NdefRecordParser(){
      public Record fromNdefRecord(NdefRecord ndefRecord) {
        return WebsiteRecord.fromNdefRecord(ndefRecord);
      }

      public boolean isRecordType(NdefRecord ndefRecord) {
        return WebsiteRecord.isWebsiteRecord(ndefRecord);
      }
    }));  
  }
}

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