1 files changed, 58 insertions, 0 deletions
diff --git a/morfologik-fsa/src/main/java/morfologik/util/ResourceUtils.java b/morfologik-fsa/src/main/java/morfologik/util/ResourceUtils.java
new file mode 100644
index 0000000..2c7bd23
--- /dev/null
+++ b/morfologik-fsa/src/main/java/morfologik/util/ResourceUtils.java
@@ -0,0 +1,58 @@
+package morfologik.util;
+
+import java.io.*;
+import java.net.*;
+
+/**
+ * Resource management utilities.
+ */
+public final class ResourceUtils {
+	/**
+	 * No instances.
+	 */
+	private ResourceUtils() {
+	}
+
+	/**
+	 * Returns an input stream to the resource.
+	 * 
+	 * @param resource
+	 *            The path leading to the resource. Can be an URL, a path
+	 *            leading to a class resource or a {@link File}.
+	 * 
+	 * @return InputStream instance.
+	 * @throws IOException
+	 *             If the resource could not be found or opened.
+	 */
+	public static InputStream openInputStream(String resource)
+	        throws IOException {
+		try {
+			// See if the resource is an URL first.
+			final URL url = new URL(resource);
+			// success, load the resource.
+			return url.openStream();
+		} catch (MalformedURLException e) {
+			// No luck. Fallback to class loader paths.
+		}
+
+		// Try current thread's class loader first.
+		final ClassLoader ldr = Thread.currentThread().getContextClassLoader();
+
+		InputStream is;
+		if (ldr != null && (is = ldr.getResourceAsStream(resource)) != null) {
+			return is;
+		} else if ((is = ResourceUtils.class.getResourceAsStream(resource)) != null) {
+			return is;
+		} else if ((is = ClassLoader.getSystemResourceAsStream(resource)) != null) {
+			return is;
+		}
+
+		// Try file path
+		final File f = new File(resource);
+		if (f.exists() && f.isFile() && f.canRead()) {
+			return new FileInputStream(f);
+		}
+
+		throw new IOException("Could not locate resource: " + resource);
+	}
+}