Adding Data Store implementations for Android and normal Java

java/src/com/zerotier/one/AndroidFileProvider.java

@@ -0,0 +1,40 @@
+package com.zerotier.one;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+import android.content.Context;
+
+public class AndroidFileProvider implements DataStoreFileProvider {
+	Context _ctx;
+		
+	AndroidFileProvider(Context ctx) {
+		this._ctx = ctx;
+	}
+
+	@Override
+	public FileInputStream getInputFileStream(String name)
+			throws FileNotFoundException {
+		// TODO Auto-generated method stub
+		return _ctx.openFileInput(name);
+	}
+
+	@Override
+	public FileOutputStream getOutputFileStream(String name)
+			throws FileNotFoundException {
+		// TODO Auto-generated method stub
+		return _ctx.openFileOutput(name, Context.MODE_PRIVATE);
+	}
+
+	@Override
+	public void deleteFile(String name) throws IOException {
+		boolean success = _ctx.deleteFile(name);
+		if(!success)
+		{
+			throw new IOException("Unable to delete file.");
+		}
+	}
+
+}

java/src/com/zerotier/one/DataStore.java

@@ -0,0 +1,65 @@
+package com.zerotier.one;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+import com.zerotier.sdk.DataStoreGetListener;
+import com.zerotier.sdk.DataStorePutListener;
+
+public class DataStore implements DataStoreGetListener, DataStorePutListener {
+
+	private DataStoreFileProvider _provider;
+
+	DataStore(DataStoreFileProvider provider) {
+		this._provider = provider;
+	}
+	
+	@Override
+	public int onDataStorePut(String name, byte[] buffer, boolean secure) {
+		try {
+			FileOutputStream fos = _provider.getOutputFileStream(name);
+            fos.write(buffer);
+            fos.close();
+            return buffer.length;
+		} catch (FileNotFoundException fnf) {
+			
+		} catch (IOException io) {
+			
+		}
+		return 0;
+	}
+
+	@Override
+	public int onDelete(String name) {
+		try {
+			_provider.deleteFile(name);
+			return 0;
+		} catch (IOException ex) {
+			return -1;
+		}
+	}
+
+	@Override
+	public long onDataStoreGet(String name, byte[] out_buffer,
+			long bufferIndex, long[] out_objectSize) {
+		try {
+            FileInputStream fin = _provider.getInputFileStream(name);
+			out_objectSize[0] = fin.getChannel().size();
+            if(bufferIndex > 0)
+            {
+                fin.skip(bufferIndex);
+            }
+            int read = fin.read(out_buffer);
+            fin.close();
+            return read;
+		} catch (FileNotFoundException fnf) {
+			return -1;
+		} catch (IOException io) {
+			return -2;
+		}
+	}
+	
+
+}

java/src/com/zerotier/one/DataStoreFileProvider.java

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+package com.zerotier.one;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+public interface DataStoreFileProvider {
+	FileInputStream getInputFileStream(String name) throws FileNotFoundException;
+	FileOutputStream getOutputFileStream(String name) throws FileNotFoundException;
+	void deleteFile(String name) throws IOException;
+}

java/src/com/zerotier/one/JavaFileProvider.java

@@ -0,0 +1,38 @@
+package com.zerotier.one;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+public class JavaFileProvider implements DataStoreFileProvider {
+	private String _path;
+
+	public JavaFileProvider(String path) {
+		this._path = path;
+	}
+	
+	@Override
+	public FileInputStream getInputFileStream(String name)
+			throws FileNotFoundException {
+		File f = new File(_path + File.pathSeparator + name);
+		return new FileInputStream(f);
+	}
+
+	@Override
+	public FileOutputStream getOutputFileStream(String name)
+			throws FileNotFoundException {
+		File f = new File(_path + File.pathSeparator + name);
+		return new FileOutputStream(f);
+	}
+
+	@Override
+	public void deleteFile(String name) throws IOException {
+		File f = new File(_path + File.pathSeparator + name);
+		boolean success = f.delete();
+		if(!success) {
+			throw new IOException("Unable to delete file: " + _path + File.pathSeparator + name);
+		}
+	}
+}