refactor: back deprecated methods by default implementation using the new methods

Author: cmhulbert

src/main/java/org/janelia/saalfeldlab/n5/BufferedKvaLockedChannel.java

@@ -0,0 +1,47 @@
+package org.janelia.saalfeldlab.n5;
+
+import org.janelia.saalfeldlab.n5.readdata.ReadData;
+
+import java.io.*;
+
+class BufferedKvaLockedChannel implements LockedChannel {
+
+    private final KeyValueAccess kva;
+    private final String key;
+    private ByteArrayOutputStream baos = null;
+
+    BufferedKvaLockedChannel(final KeyValueAccess kva, final String key) {
+        this.kva = kva;
+        this.key = key;
+    }
+
+    @Override
+    public Reader newReader() throws N5Exception.N5IOException {
+
+        return new InputStreamReader(newInputStream());
+    }
+
+    @Override
+    public InputStream newInputStream() throws N5Exception.N5IOException {
+        return kva.createReadData(key).inputStream();
+    }
+
+    @Override
+    public Writer newWriter() throws N5Exception.N5IOException {
+
+        return new BufferedWriter(new OutputStreamWriter(newOutputStream()));
+    }
+
+    @Override
+    public OutputStream newOutputStream() throws N5Exception.N5IOException {
+        if (baos == null)
+            baos = new ByteArrayOutputStream();
+        return baos;
+    }
+
+    @Override
+    public void close() throws IOException {
+        if (baos != null && baos.size() > 0)
+            kva.write(key, ReadData.from(baos.toByteArray()));
+    }
+}

src/main/java/org/janelia/saalfeldlab/n5/KeyValueAccess.java

@@ -297,7 +297,9 @@ default URI uri(final String uriString) throws URISyntaxException {
 	 * @deprecated migrate to {@link KeyValueAccess#createReadData(String)}
 	 */
 	@Deprecated
-	LockedChannel lockForReading( final String normalPath ) throws N5IOException;
+	default LockedChannel lockForReading( final String normalPath ) throws N5IOException {
+		return new BufferedKvaLockedChannel(this, normalPath);
+	}
 
 	/**
 	 * Create an exclusive lock on a path for writing. If the file doesn't exist
@@ -318,7 +320,9 @@ default URI uri(final String uriString) throws URISyntaxException {
 	 * @deprecated migrate to {@link KeyValueAccess#write(String, ReadData)}
 	 */
 	@Deprecated
-	LockedChannel lockForWriting( final String normalPath ) throws N5IOException;
+	default LockedChannel lockForWriting( final String normalPath ) throws N5IOException {
+		return new BufferedKvaLockedChannel(this, normalPath);
+	}
 
 	/**
 	 * List all 'directory'-like children of a path.