1 files changed, 54 insertions, 0 deletions
diff --git a/morfologik-fsa/src/main/java/morfologik/util/BufferUtils.java b/morfologik-fsa/src/main/java/morfologik/util/BufferUtils.java
new file mode 100644
index 0000000..6ccfbc6
--- /dev/null
+++ b/morfologik-fsa/src/main/java/morfologik/util/BufferUtils.java
@@ -0,0 +1,54 @@
+package morfologik.util;
+
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+
+/**
+ * Utility functions for buffers.
+ */
+public final class BufferUtils {
+
+	/**
+	 * No instances.
+	 */
+	private BufferUtils() {
+		// empty
+	}
+
+	/**
+	 * Ensure the byte buffer's capacity. If a new buffer is allocated, its
+	 * content is empty (the old buffer's contents is not copied).
+	 * 
+	 * @param buffer
+	 *            The buffer to check or <code>null</code> if a new buffer
+	 *            should be allocated.
+	 */
+	public static ByteBuffer ensureCapacity(ByteBuffer buffer, int capacity) {
+		if (buffer == null || buffer.capacity() < capacity) {
+			buffer = ByteBuffer.allocate(capacity);
+		}
+		return buffer;
+	}
+
+	/**
+	 * Ensure the char buffer's capacity. If a new buffer is allocated, its
+	 * content is empty (the old buffer's contents is not copied).
+	 * 
+	 * @param buffer
+	 *            The buffer to check or <code>null</code> if a new buffer
+	 *            should be allocated.
+	 */
+	public static CharBuffer ensureCapacity(CharBuffer buffer, int capacity) {
+		if (buffer == null || buffer.capacity() < capacity) {
+			buffer = CharBuffer.allocate(capacity);
+		}
+		return buffer;
+	}
+
+	/**
+	 * Convert a byte buffer to a string in platform default encoding.
+	 */
+	public static String toString(ByteBuffer sequence) {
+		return new String(sequence.array(), sequence.position(), sequence.remaining());
+    }
+}
+\ No newline at end of file