Add file source.

diff --git a/src/main/java/net/pterodactylus/sonitus/data/source/FileSource.java b/src/main/java/net/pterodactylus/sonitus/data/source/FileSource.java
new file mode 100644 (file)
index 0000000..cc61ce0
--- /dev/null
+++ b/src/main/java/net/pterodactylus/sonitus/data/source/FileSource.java
@@ -0,0 +1,104 @@
+/*
+ * Sonitus - FileSource.java - Copyright © 2013 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sonitus.data.source;
+
+import static com.google.common.base.Preconditions.*;
+import static net.pterodactylus.sonitus.data.Format.UNKNOWN_CHANNELS;
+import static net.pterodactylus.sonitus.data.Format.UNKNOWN_ENCODING;
+import static net.pterodactylus.sonitus.data.Format.UNKNOWN_FREQUENCY;
+
+import java.io.EOFException;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Arrays;
+
+import net.pterodactylus.sonitus.data.Format;
+import net.pterodactylus.sonitus.data.Source;
+import net.pterodactylus.sonitus.io.IdentifyingInputStream;
+
+import com.google.common.base.Optional;
+import com.google.common.io.ByteStreams;
+
+/**
+ * A {@link Source} that is read from the local file system.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class FileSource implements Source {
+
+       /** The path of the file. */
+       private final String path;
+
+       /** The identified format of the file. */
+       private final Format format;
+
+       /** The input stream. */
+       private InputStream fileInputStream;
+
+       /**
+        * Creates a new file source.
+        *
+        * @param path
+        *              The path of the file
+        * @throws IOException
+        *              if the file can not be found, or an I/O error occurs
+        */
+       public FileSource(String path) throws IOException {
+               this.path = checkNotNull(path, "path must not be null");
+               fileInputStream = new FileInputStream(path);
+
+               /* identify file type. */
+               Optional<IdentifyingInputStream> identifyingInputStream = IdentifyingInputStream.create(new FileInputStream(path));
+               if (identifyingInputStream.isPresent()) {
+                       format = identifyingInputStream.get().format();
+               } else {
+                       /* fallback. */
+                       format = new Format(UNKNOWN_CHANNELS, UNKNOWN_FREQUENCY, UNKNOWN_ENCODING);
+               }
+       }
+
+       //
+       // SOURCE METHODS
+       //
+
+       @Override
+       public Format format() {
+               return format;
+       }
+
+       @Override
+       public byte[] get(int bufferSize) throws IOException {
+               byte[] buffer = new byte[bufferSize];
+               int read = ByteStreams.read(fileInputStream, buffer, 0, bufferSize);
+               if (read == 0) {
+                       throw new EOFException();
+               }
+               return Arrays.copyOf(buffer, read);
+       }
+
+       //
+       // OBJECT METHODS
+       //
+
+       @Override
+       public String toString() {
+               return String.format("%s (%s)", path, format);
+       }
+
+}