Merge branch 'trz/rebase' into trz/rename

Conflicts:
	build.gradle
	src/main/java/de/thedevstack/conversationsplus/crypto/OtrEngine.java
	src/main/java/de/thedevstack/conversationsplus/entities/Account.java
	src/main/java/de/thedevstack/conversationsplus/entities/Contact.java
	src/main/java/de/thedevstack/conversationsplus/entities/Downloadable.java
	src/main/java/de/thedevstack/conversationsplus/entities/DownloadableFile.java
	src/main/java/de/thedevstack/conversationsplus/entities/DownloadablePlaceholder.java
	src/main/java/de/thedevstack/conversationsplus/entities/Message.java
	src/main/java/de/thedevstack/conversationsplus/generator/IqGenerator.java
	src/main/java/de/thedevstack/conversationsplus/http/HttpConnection.java
	src/main/java/de/thedevstack/conversationsplus/http/HttpConnectionManager.java
	src/main/java/de/thedevstack/conversationsplus/parser/AbstractParser.java
	src/main/java/de/thedevstack/conversationsplus/parser/MessageParser.java
	src/main/java/de/thedevstack/conversationsplus/parser/PresenceParser.java
	src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java
	src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java
	src/main/java/de/thedevstack/conversationsplus/services/NotificationService.java
	src/main/java/de/thedevstack/conversationsplus/services/XmppConnectionService.java
	src/main/java/de/thedevstack/conversationsplus/ui/ConversationActivity.java
	src/main/java/de/thedevstack/conversationsplus/ui/ConversationFragment.java
	src/main/java/de/thedevstack/conversationsplus/ui/SettingsActivity.java
	src/main/java/de/thedevstack/conversationsplus/ui/StartConversationActivity.java
	src/main/java/de/thedevstack/conversationsplus/ui/adapter/AccountAdapter.java
	src/main/java/de/thedevstack/conversationsplus/ui/adapter/ConversationAdapter.java
	src/main/java/de/thedevstack/conversationsplus/ui/adapter/ListItemAdapter.java
	src/main/java/de/thedevstack/conversationsplus/ui/adapter/MessageAdapter.java
	src/main/java/de/thedevstack/conversationsplus/utils/UIHelper.java
	src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java
	src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java
	src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java
	src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java
	src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/MessagePacket.java
	src/main/java/eu/siacs/conversations/crypto/OtrEngine.java
	src/main/java/eu/siacs/conversations/crypto/OtrService.java
	src/main/java/eu/siacs/conversations/entities/DownloadablePlaceholder.java
	src/main/java/eu/siacs/conversations/entities/TransferablePlaceholder.java
	src/main/java/eu/siacs/conversations/http/HttpConnection.java
	src/main/java/eu/siacs/conversations/http/HttpDownloadConnection.java
	src/main/res/layout/activity_about.xml

2 files changed, 176 insertions, 68 deletions

diff --git a/src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java b/src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java
index bee19e4f..21eaf476 100644
--- a/src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java
+++ b/src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java
@@ -4,11 +4,13 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
 
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.Conversation;
 import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.entities.Roster;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
 import android.content.Context;
@@ -16,13 +18,14 @@ import android.database.Cursor;
 import android.database.sqlite.SQLiteCantOpenDatabaseException;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;
+import android.util.Log;
 
 public class DatabaseBackend extends SQLiteOpenHelper {
 
 	private static DatabaseBackend instance = null;
 
 	private static final String DATABASE_NAME = "history";
-	private static final int DATABASE_VERSION = 13;
+	private static final int DATABASE_VERSION = 14;
 
 	private static String CREATE_CONTATCS_STATEMENT = "create table "
 			+ Contact.TABLENAME + "(" + Contact.ACCOUNT + " TEXT, "
@@ -130,6 +133,88 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 			db.execSQL("delete from "+Contact.TABLENAME);
 			db.execSQL("update "+Account.TABLENAME+" set "+Account.ROSTERVERSION+" = NULL");
 		}
+		if (oldVersion < 14 && newVersion >= 14) {
+			// migrate db to new, canonicalized JID domainpart representation
+
+			// Conversation table
+			Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME, new String[0]);
+			while(cursor.moveToNext()) {
+				String newJid;
+				try {
+					newJid = Jid.fromString(
+							cursor.getString(cursor.getColumnIndex(Conversation.CONTACTJID))
+					).toString();
+				} catch (InvalidJidException ignored) {
+					Log.e(Config.LOGTAG, "Failed to migrate Conversation CONTACTJID "
+							+cursor.getString(cursor.getColumnIndex(Conversation.CONTACTJID))
+							+": " + ignored +". Skipping...");
+					continue;
+				}
+
+				String updateArgs[] = {
+						newJid,
+						cursor.getString(cursor.getColumnIndex(Conversation.UUID)),
+				};
+				db.execSQL("update " + Conversation.TABLENAME
+						+ " set " + Conversation.CONTACTJID	+ " = ? "
+						+ " where " + Conversation.UUID + " = ?", updateArgs);
+			}
+			cursor.close();
+
+			// Contact table
+			cursor = db.rawQuery("select * from " + Contact.TABLENAME, new String[0]);
+			while(cursor.moveToNext()) {
+				String newJid;
+				try {
+					newJid = Jid.fromString(
+							cursor.getString(cursor.getColumnIndex(Contact.JID))
+					).toString();
+				} catch (InvalidJidException ignored) {
+					Log.e(Config.LOGTAG, "Failed to migrate Contact JID "
+							+cursor.getString(cursor.getColumnIndex(Contact.JID))
+							+": " + ignored +". Skipping...");
+					continue;
+				}
+
+				String updateArgs[] = {
+						newJid,
+						cursor.getString(cursor.getColumnIndex(Contact.ACCOUNT)),
+						cursor.getString(cursor.getColumnIndex(Contact.JID)),
+				};
+				db.execSQL("update " + Contact.TABLENAME
+						+ " set " + Contact.JID + " = ? "
+						+ " where " + Contact.ACCOUNT + " = ? "
+						+ " AND " + Contact.JID + " = ?", updateArgs);
+			}
+			cursor.close();
+
+			// Account table
+			cursor = db.rawQuery("select * from " + Account.TABLENAME, new String[0]);
+			while(cursor.moveToNext()) {
+				String newServer;
+				try {
+					newServer = Jid.fromParts(
+							cursor.getString(cursor.getColumnIndex(Account.USERNAME)),
+							cursor.getString(cursor.getColumnIndex(Account.SERVER)),
+							"mobile"
+					).getDomainpart();
+				} catch (InvalidJidException ignored) {
+					Log.e(Config.LOGTAG, "Failed to migrate Account SERVER "
+							+cursor.getString(cursor.getColumnIndex(Account.SERVER))
+							+": " + ignored +". Skipping...");
+					continue;
+				}
+
+				String updateArgs[] = {
+						newServer,
+						cursor.getString(cursor.getColumnIndex(Account.UUID)),
+				};
+				db.execSQL("update " + Account.TABLENAME
+						+ " set " + Account.SERVER + " = ? "
+						+ " where " + Account.UUID + " = ?", updateArgs);
+			}
+			cursor.close();
+		}
 	}
 
 	public static synchronized DatabaseBackend getInstance(Context context) {
@@ -301,8 +386,7 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 		SQLiteDatabase db = this.getReadableDatabase();
 		Cursor cursor;
 		String args[] = { roster.getAccount().getUuid() };
-		cursor = db.query(Contact.TABLENAME, null, Contact.ACCOUNT + "=?",
-				args, null, null, null);
+		cursor = db.query(Contact.TABLENAME, null, Contact.ACCOUNT + "=?", args, null, null, null);
 		while (cursor.moveToNext()) {
 			roster.initContact(Contact.fromCursor(cursor));
 		}
diff --git a/src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java b/src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java
index e3bf58c7..3a245d62 100644
--- a/src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java
+++ b/src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java
@@ -1,6 +1,7 @@
 package de.thedevstack.conversationsplus.persistance;
 
 import java.io.ByteArrayOutputStream;
+import java.io.Closeable;
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
@@ -12,6 +13,7 @@ import java.security.DigestOutputStream;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.text.SimpleDateFormat;
+import java.util.Arrays;
 import java.util.Date;
 import java.util.Locale;
 
@@ -31,6 +33,7 @@ import android.webkit.MimeTypeMap;
 
 import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
 import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
@@ -42,8 +45,7 @@ public class FileBackend {
 
 	private static int IMAGE_SIZE = 1920;
 
-	private SimpleDateFormat imageDateFormat = new SimpleDateFormat(
-			"yyyyMMdd_HHmmssSSS", Locale.US);
+	private final SimpleDateFormat imageDateFormat = new SimpleDateFormat("yyyyMMdd_HHmmssSSS", Locale.US);
 
 	private XmppConnectionService mXmppConnectionService;
 
@@ -78,10 +80,10 @@ public class FileBackend {
 			if (path.startsWith("/")) {
 				return new DownloadableFile(path);
 			} else {
-				if (message.getType() == Message.TYPE_FILE) {
+				if (Arrays.asList(Transferable.VALID_IMAGE_EXTENSIONS).contains(extension)) {
 					return new DownloadableFile(getConversationsFileDirectory() + path);
 				} else {
-					return new DownloadableFile(getConversationsImageDirectory()+path);
+					return new DownloadableFile(getConversationsImageDirectory() + path);
 				}
 			}
 		}
@@ -110,9 +112,7 @@ public class FileBackend {
 				scalledW = size;
 				scalledH = (int) (h / ((double) w / size));
 			}
-			Bitmap scalledBitmap = Bitmap.createScaledBitmap(originalBitmap,
-					scalledW, scalledH, true);
-			return scalledBitmap;
+			return Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
 		} else {
 			return originalBitmap;
 		}
@@ -148,31 +148,35 @@ public class FileBackend {
 	}
 
 	public DownloadableFile copyFileToPrivateStorage(Message message, Uri uri) throws FileCopyException {
+		Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage");
+		String mime = mXmppConnectionService.getContentResolver().getType(uri);
+		String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime);
+		message.setRelativeFilePath(message.getUuid() + "." + extension);
+		DownloadableFile file = mXmppConnectionService.getFileBackend().getFile(message);
+		file.getParentFile().mkdirs();
+		OutputStream os = null;
+		InputStream is = null;
 		try {
-			Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage");
-			String mime = mXmppConnectionService.getContentResolver().getType(uri);
-			String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime);
-			message.setRelativeFilePath(message.getUuid() + "." + extension);
-			DownloadableFile file = mXmppConnectionService.getFileBackend().getFile(message);
-			file.getParentFile().mkdirs();
 			file.createNewFile();
-			OutputStream os = new FileOutputStream(file);
-			InputStream is = mXmppConnectionService.getContentResolver().openInputStream(uri);
+			os = new FileOutputStream(file);
+			is = mXmppConnectionService.getContentResolver().openInputStream(uri);
 			byte[] buffer = new byte[1024];
-            int length;
-            while ((length = is.read(buffer)) > 0) {
+			int length;
+			while ((length = is.read(buffer)) > 0) {
 				os.write(buffer, 0, length);
-            }
+			}
 			os.flush();
-			os.close();
-			is.close();
-			Log.d(Config.LOGTAG, "output file name " + mXmppConnectionService.getFileBackend().getFile(message));
-			return file;
-		} catch (FileNotFoundException e) {
+		} catch(FileNotFoundException e) {
 			throw new FileCopyException(R.string.error_file_not_found);
 		} catch (IOException e) {
+			e.printStackTrace();
 			throw new FileCopyException(R.string.error_io_exception);
+		} finally {
+			close(os);
+			close(is);
 		}
+		Log.d(Config.LOGTAG, "output file name " + mXmppConnectionService.getFileBackend().getFile(message));
+		return file;
 	}
 
 	public DownloadableFile copyImageToPrivateStorage(Message message, Uri image)
@@ -182,49 +186,48 @@ public class FileBackend {
 
 	private DownloadableFile copyImageToPrivateStorage(Message message,
 			Uri image, int sampleSize) throws FileCopyException {
+		DownloadableFile file = getFile(message);
+		file.getParentFile().mkdirs();
+		InputStream is = null;
+		OutputStream os = null;
 		try {
-			InputStream is = mXmppConnectionService.getContentResolver()
-					.openInputStream(image);
-			DownloadableFile file = getFile(message);
-			file.getParentFile().mkdirs();
 			file.createNewFile();
+			is = mXmppConnectionService.getContentResolver().openInputStream(image);
+			os = new FileOutputStream(file);
+
 			Bitmap originalBitmap;
 			BitmapFactory.Options options = new BitmapFactory.Options();
 			int inSampleSize = (int) Math.pow(2, sampleSize);
-			Log.d(Config.LOGTAG, "reading bitmap with sample size "
-					+ inSampleSize);
+			Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
 			options.inSampleSize = inSampleSize;
 			originalBitmap = BitmapFactory.decodeStream(is, null, options);
 			is.close();
 			if (originalBitmap == null) {
 				throw new FileCopyException(R.string.error_not_an_image_file);
 			}
-			Bitmap scalledBitmap = resize(originalBitmap, IMAGE_SIZE);
-			originalBitmap = null;
+			Bitmap scaledBitmap = resize(originalBitmap, IMAGE_SIZE);
 			int rotation = getRotation(image);
 			if (rotation > 0) {
-				scalledBitmap = rotate(scalledBitmap, rotation);
+				scaledBitmap = rotate(scaledBitmap, rotation);
 			}
-			OutputStream os = new FileOutputStream(file);
-			boolean success = scalledBitmap.compress(
-					Bitmap.CompressFormat.WEBP, 75, os);
+
+			boolean success = scaledBitmap.compress(Bitmap.CompressFormat.WEBP, 75, os);
 			if (!success) {
 				throw new FileCopyException(R.string.error_compressing_image);
 			}
 			os.flush();
-			os.close();
 			long size = file.getSize();
-			int width = scalledBitmap.getWidth();
-			int height = scalledBitmap.getHeight();
-			message.setBody(Long.toString(size) + ',' + width + ',' + height);
+			int width = scaledBitmap.getWidth();
+			int height = scaledBitmap.getHeight();
+			message.setBody(Long.toString(size) + '|' + width + '|' + height);
 			return file;
 		} catch (FileNotFoundException e) {
 			throw new FileCopyException(R.string.error_file_not_found);
 		} catch (IOException e) {
+			e.printStackTrace();
 			throw new FileCopyException(R.string.error_io_exception);
 		} catch (SecurityException e) {
-			throw new FileCopyException(
-					R.string.error_security_exception_during_image_copy);
+			throw new FileCopyException(R.string.error_security_exception_during_image_copy);
 		} catch (OutOfMemoryError e) {
 			++sampleSize;
 			if (sampleSize <= 3) {
@@ -232,23 +235,26 @@ public class FileBackend {
 			} else {
 				throw new FileCopyException(R.string.error_out_of_memory);
 			}
+		} catch (NullPointerException e) {
+			throw new FileCopyException(R.string.error_io_exception);
+		} finally {
+			close(os);
+			close(is);
 		}
 	}
 
 	private int getRotation(Uri image) {
+		InputStream is = null;
 		try {
-			InputStream is = mXmppConnectionService.getContentResolver()
-					.openInputStream(image);
+			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 			return ExifHelper.getOrientation(is);
 		} catch (FileNotFoundException e) {
 			return 0;
+		} finally {
+			close(is);
 		}
 	}
 
-	public Bitmap getImageFromMessage(Message message) {
-		return BitmapFactory.decodeFile(getFile(message).getAbsolutePath());
-	}
-
 	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly)
 			throws FileNotFoundException {
 		Bitmap thumbnail = mXmppConnectionService.getBitmapCache().get(
@@ -257,8 +263,7 @@ public class FileBackend {
 			File file = getFile(message);
 			BitmapFactory.Options options = new BitmapFactory.Options();
 			options.inSampleSize = calcSampleSize(file, size);
-			Bitmap fullsize = BitmapFactory.decodeFile(file.getAbsolutePath(),
-					options);
+			Bitmap fullsize = BitmapFactory.decodeFile(file.getAbsolutePath(),options);
 			if (fullsize == null) {
 				throw new FileNotFoundException();
 			}
@@ -271,13 +276,11 @@ public class FileBackend {
 
 	public Uri getTakePhotoUri() {
 		StringBuilder pathBuilder = new StringBuilder();
-		pathBuilder.append(Environment
-				.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM));
+		pathBuilder.append(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM));
 		pathBuilder.append('/');
 		pathBuilder.append("Camera");
 		pathBuilder.append('/');
-		pathBuilder.append("IMG_" + this.imageDateFormat.format(new Date())
-				+ ".jpg");
+		pathBuilder.append("IMG_" + this.imageDateFormat.format(new Date()) + ".jpg");
 		Uri uri = Uri.parse("file://" + pathBuilder.toString());
 		File file = new File(uri.toString());
 		file.getParentFile().mkdirs();
@@ -325,13 +328,13 @@ public class FileBackend {
 			String filename = getAvatarPath(avatar.getFilename());
 			file = new File(filename + ".tmp");
 			file.getParentFile().mkdirs();
+			OutputStream os = null;
 			try {
 				file.createNewFile();
-				FileOutputStream mFileOutputStream = new FileOutputStream(file);
+				os = new FileOutputStream(file);
 				MessageDigest digest = MessageDigest.getInstance("SHA-1");
 				digest.reset();
-				DigestOutputStream mDigestOutputStream = new DigestOutputStream(
-						mFileOutputStream, digest);
+				DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
 				mDigestOutputStream.write(avatar.getImageAsBytes());
 				mDigestOutputStream.flush();
 				mDigestOutputStream.close();
@@ -349,6 +352,8 @@ public class FileBackend {
 				return false;
 			} catch (NoSuchAlgorithmException e) {
 				return false;
+			} finally {
+				close(os);
 			}
 		}
 		avatar.size = file.length();
@@ -356,8 +361,7 @@ public class FileBackend {
 	}
 
 	public String getAvatarPath(String avatar) {
-		return mXmppConnectionService.getFilesDir().getAbsolutePath()
-				+ "/avatars/" + avatar;
+		return mXmppConnectionService.getFilesDir().getAbsolutePath()+ "/avatars/" + avatar;
 	}
 
 	public Uri getAvatarUri(String avatar) {
@@ -368,10 +372,11 @@ public class FileBackend {
 		if (image == null) {
 			return null;
 		}
+		InputStream is = null;
 		try {
 			BitmapFactory.Options options = new BitmapFactory.Options();
 			options.inSampleSize = calcSampleSize(image, size);
-			InputStream is = mXmppConnectionService.getContentResolver().openInputStream(image);
+			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 			Bitmap input = BitmapFactory.decodeStream(is, null, options);
 			if (input == null) {
 				return null;
@@ -384,6 +389,8 @@ public class FileBackend {
 			}
 		} catch (FileNotFoundException e) {
 			return null;
+		} finally {
+			close(is);
 		}
 	}
 
@@ -391,12 +398,15 @@ public class FileBackend {
 		if (image == null) {
 			return null;
 		}
+		InputStream is = null;
 		try {
 			BitmapFactory.Options options = new BitmapFactory.Options();
 			options.inSampleSize = calcSampleSize(image,Math.max(newHeight, newWidth));
-			InputStream is = mXmppConnectionService.getContentResolver().openInputStream(image);
+			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 			Bitmap source = BitmapFactory.decodeStream(is, null, options);
-
+			if (source == null) {
+				return null;
+			}
 			int sourceWidth = source.getWidth();
 			int sourceHeight = source.getHeight();
 			float xScale = (float) newWidth / sourceWidth;
@@ -408,14 +418,15 @@ public class FileBackend {
 			float top = (newHeight - scaledHeight) / 2;
 
 			RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
-			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, source.getConfig());
+			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
 			Canvas canvas = new Canvas(dest);
 			canvas.drawBitmap(source, null, targetRect, null);
 			return dest;
 		} catch (FileNotFoundException e) {
 			return null;
+		} finally {
+			close(is);
 		}
-
 	}
 
 	public Bitmap cropCenterSquare(Bitmap input, int size) {
@@ -430,7 +441,7 @@ public class FileBackend {
 		float top = (size - outHeight) / 2;
 		RectF target = new RectF(left, top, left + outWidth, top + outHeight);
 
-		Bitmap output = Bitmap.createBitmap(size, size, input.getConfig());
+		Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 		Canvas canvas = new Canvas(output);
 		canvas.drawBitmap(input, null, target, null);
 		return output;
@@ -490,7 +501,11 @@ public class FileBackend {
 				message.setBody(url.toString()+"|"+Long.toString(file.getSize()) + '|' + imageWidth + '|' + imageHeight);
 			}
 		} else {
-			message.setBody(Long.toString(file.getSize()));
+			if (url != null) {
+				message.setBody(url.toString()+"|"+Long.toString(file.getSize()));
+			} else {
+				message.setBody(Long.toString(file.getSize()));
+			}
 		}
 
 	}
@@ -522,4 +537,13 @@ public class FileBackend {
 	public boolean isFileAvailable(Message message) {
 		return getFile(message).exists();
 	}
+
+	public static void close(Closeable stream) {
+		if (stream != null) {
+			try {
+				stream.close();
+			} catch (IOException e) {
+			}
+		}
+	}
 }