From 1b3a71d4f334c21c2355972a24bac2f4a01d1cb7 Mon Sep 17 00:00:00 2001
From: Jeremias Maerki <jeremias@apache.org>
Date: Fri, 8 Nov 2002 10:00:29 +0000
Subject: [PATCH] Little helper class with static methods to build a URL from a
 string which can be a URL or a filename.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/fop-0_20_2-maintain@195449 13f79535-47bb-0310-9956-ffa450edef68
---
 src/org/apache/fop/tools/URLBuilder.java | 64 ++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 src/org/apache/fop/tools/URLBuilder.java

diff --git a/src/org/apache/fop/tools/URLBuilder.java b/src/org/apache/fop/tools/URLBuilder.java
new file mode 100644
index 000000000..914d2e9d4
--- /dev/null
+++ b/src/org/apache/fop/tools/URLBuilder.java
@@ -0,0 +1,64 @@
+/*
+ * $Id$
+ * Copyright (C) 2002 The Apache Software Foundation. All rights reserved.
+ * For details on use and redistribution please refer to the
+ * LICENSE file included with these sources.
+ */
+
+package org.apache.fop.tools;
+
+import java.io.File;
+import java.net.URL;
+import java.net.MalformedURLException;
+
+/**
+ * This utility class is used to build URLs from Strings. The String can be
+ * normal URLs but also just filenames. The filenames get converted to a
+ * file URL.
+ *
+ * @author Jeremias Maerki
+ */
+public class URLBuilder {
+
+    /**
+     * Build an URL based on a String. The String can be a normal URL or a
+     * filename. Filenames get automatically converted to to URLs.
+     *
+     * @param spec  A URL or a filename
+     * @return      The requested URL
+     * @throws MalformedURLException If spec cannot be converted to a URL.
+     */
+    public static URL buildURL(String spec) throws MalformedURLException {
+        if (spec == null) throw new NullPointerException("spec must not be null");
+        File f = new File(spec);
+        if (f.exists()) {
+            return f.toURL();
+        } else {
+            URL u1 = new URL(spec);
+            return u1;
+        }
+    }
+
+
+    /**
+     * Build an URL based on a String. The String can be a normal URL or a
+     * filename. Filenames get automatically converted to to URLs.
+     *
+     * @param baseURL   Base URL for relative paths
+     * @param spec  A URL or a filename
+     * @return      The requested URL
+     * @throws MalformedURLException If spec cannot be converted to a URL.
+     */
+    public static URL buildURL(URL baseURL, String spec) throws MalformedURLException {
+        if (spec == null) throw new NullPointerException("spec must not be null");
+        try {
+            URL u1 = buildURL(spec);
+            return u1;
+        } catch (MalformedURLException mfue) {
+            if (baseURL == null) throw mfue;
+            URL u2 = new URL(baseURL, spec);
+            return u2;
+        }
+    }
+
+}
\ No newline at end of file
-- 
2.39.5