Android Open Source - NFCAndroid Uri Ndef 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.ndef;
/*  www  .j  ava2  s  .  co  m*/
import java.nio.charset.Charset;
import java.util.Arrays;

import com.google.common.base.Preconditions;
import com.google.common.collect.BiMap;
import com.google.common.collect.ImmutableBiMap;
import com.google.common.primitives.Bytes;

import android.net.Uri;
import android.nfc.NdefRecord;

public class UriNdefRecord extends ParsedNdefRecord {
  private static final byte ZERO = (byte)0x00;
  
  private static final BiMap<Byte, String> URI_PREFIX_MAP = ImmutableBiMap.<Byte, String>builder()
            .put(ZERO, "")
            .put((byte)0x01, "http://www.")
            .put((byte)0x02, "https://www.")
            .put((byte)0x03, "http://")
            .put((byte)0x04, "https://")
            .put((byte)0x05, "tel:")
            .put((byte)0x06, "mailto:")
            .put((byte)0x07, "ftp://anonymous:anonymous@")
            .put((byte)0x08, "ftp://ftp.")
            .put((byte)0x09, "ftps://")
            .put((byte)0x0A, "sftp://")
            .put((byte)0x0B, "smb://")
            .put((byte)0x0C, "nfs://")
            .put((byte)0x0D, "ftp://")
            .put((byte)0x0E, "dav://")
            .put((byte)0x0F, "news:")
            .put((byte)0x10, "telnet://")
            .put((byte)0x11, "imap:")
            .put((byte)0x12, "rtsp://")
            .put((byte)0x13, "urn:")
            .put((byte)0x14, "pop:")
            .put((byte)0x15, "sip:")
            .put((byte)0x16, "sips:")
            .put((byte)0x17, "tftp:")
            .put((byte)0x18, "btspp://")
            .put((byte)0x19, "btl2cap://")
            .put((byte)0x1A, "btgoep://")
            .put((byte)0x1B, "tcpobex://")
            .put((byte)0x1C, "irdaobex://")
            .put((byte)0x1D, "file://")
            .put((byte)0x1E, "urn:epc:id:")
            .put((byte)0x1F, "urn:epc:tag:")
            .put((byte)0x20, "urn:epc:pat:")
            .put((byte)0x21, "urn:epc:raw:")
            .put((byte)0x22, "urn:epc:")
            .put((byte)0x23, "urn:nfc:")
            .build();
  
  public static String getPrefixValue(Uri uri) {
    if (uri != null) {
      String uriString = uri.toString().toLowerCase();
      
      for (byte prefixByte : URI_PREFIX_MAP.keySet()) {
        if (prefixByte != ZERO) {
          String prefixValue = URI_PREFIX_MAP.get(prefixByte);
          
          if (uriString.startsWith(prefixValue))
            return prefixValue;
        }
      }
    }
    
    return URI_PREFIX_MAP.get(ZERO);
  }
  
  public static byte getPrefixByte(Uri uri) {
    if (uri != null) {
      String uriString = uri.toString().toLowerCase();
      
      for (byte prefixByte : URI_PREFIX_MAP.keySet()) {
        if (prefixByte != ZERO) {
          if (uriString.startsWith(URI_PREFIX_MAP.get(prefixByte)))
            return prefixByte;
        }
      }
    }
    
    return ZERO;
  }
  
  private Uri uri;
  
  public UriNdefRecord() {
  }
  
  public UriNdefRecord(Uri uri) {
    this.setUri(uri);
  }
  
  public UriNdefRecord(String uriString) {
    this.setUri(Uri.parse(uriString));
  }
  
  public Uri getUri() {
    return uri;
  }

  public void setUri(Uri uri) {
    this.uri = uri;
  }
  
  @Override
  public NdefRecord toNdefRecord() {
    Preconditions.checkNotNull(this.getUri());
    
    try {
      String prefixValue = getPrefixValue(this.getUri());
      
      String value = this.getUri().toString().substring(prefixValue.length());
      byte[] valueField = value.getBytes(Charset.forName("UTF-8"));
      
      byte[] payload = new byte[valueField.length + 1];
      
      payload[0] = UriNdefRecord.getPrefixByte(this.getUri());
      
      System.arraycopy(valueField, 0, payload, 1, valueField.length);
      
      return new NdefRecord(NdefRecord.TNF_WELL_KNOWN, NdefRecord.RTD_URI, new byte[0], payload);
    } catch (Exception exception) {
      throw new IllegalArgumentException(exception);
    }
  }
  
  public static UriNdefRecord fromNdefRecord(NdefRecord ndefRecord) {
    Preconditions.checkNotNull(ndefRecord);
    
    short tnf = ndefRecord.getTnf();
    Preconditions.checkArgument(tnf == NdefRecord.TNF_WELL_KNOWN || tnf == NdefRecord.TNF_ABSOLUTE_URI);
    
    byte[] payload = ndefRecord.getPayload();
    
    try {
        if (tnf == NdefRecord.TNF_WELL_KNOWN) {
          String prefix = URI_PREFIX_MAP.get(payload[0]);
            
            byte[] fullUri = Bytes.concat(
                    prefix.getBytes(Charset.forName("UTF-8")),
                    Arrays.copyOfRange(payload, 1, payload.length));
    
            Uri uri = Uri.parse(new String(fullUri, Charset.forName("UTF-8")));
            
            return new UriNdefRecord(uri);
        } else if (tnf == NdefRecord.TNF_ABSOLUTE_URI) {
          Uri uri = Uri.parse(new String(payload, Charset.forName("UTF-8")));
            
            return new UriNdefRecord(uri);
        } else {
          throw new IllegalArgumentException("Unknown TNF '" + tnf + "'");
        }
    } catch (Exception exception) {
      throw new IllegalArgumentException(exception);
    }
  }
  
  public static boolean isUriNdefRecord(NdefRecord ndefRecord) {
    try {
      UriNdefRecord.fromNdefRecord(ndefRecord);
      return true;
    } catch (IllegalArgumentException illegalArgumentException) {
      return false;
    }
  }
}
Java Source Code List
