1 files changed, 167 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/io/IOHelper.java b/sca-java-2.x/tags/2.0.1-RC1/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/io/IOHelper.java
new file mode 100644
index 0000000000..91aef7a65f
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/io/IOHelper.java
@@ -0,0 +1,167 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.common.java.io;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.JarURLConnection;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.net.URLConnection;
+
+/**
+ * Helper class for I/O operations
+ * @tuscany.spi.extension.asclient
+ */
+public class IOHelper {
+    
+    public static InputStream openStream(URL url) throws IOException {
+        // Handle file:<relative path> which strictly speaking is not a valid file URL  
+        File file = toFile(url);
+        if (file != null) {
+            return new FileInputStream(file);
+        }
+        URLConnection connection = url.openConnection();
+        if (connection instanceof JarURLConnection) {
+            // See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5041014
+            connection.setUseCaches(false);
+        }
+        InputStream is = connection.getInputStream();
+        return is;
+    }
+    
+    public static void close(InputStream is) {
+        if (is != null) {
+            try {
+                is.close();
+            } catch (IOException e) {
+                throw new IllegalStateException(e);
+            }
+        }
+    }
+    
+    /**
+     * Escape the space in URL string
+     * @param uri
+     * @return
+     */
+    public static URI createURI(String uri) {
+        if (uri == null) {
+            return null;
+        }
+        if (uri.indexOf('%') != -1) {
+            // Avoid double-escaping
+            return URI.create(uri);
+        }
+        int index = uri.indexOf(':');
+        String scheme = null;
+        String ssp = uri;
+        if (index != -1) {
+            scheme = uri.substring(0, index);
+            ssp = uri.substring(index + 1);
+        }
+        try {
+            return new URI(scheme, ssp, null);
+        } catch (URISyntaxException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+    
+    public static URI toURI(URL url) {
+        if (url == null) {
+            return null;
+        }
+        return createURI(url.toString());
+    }
+    
+    public static URL normalize(URL url) {
+        // Make sure the trailing / is added to the file directory URL so that
+        // URLClassLoader can load classes from that
+        try {
+            File file = toFile(url);
+            if (file != null) {
+                return file.toURI().toURL();
+            } else {
+                return toURI(url).toURL();
+            }
+        } catch (MalformedURLException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+    
+    /**
+     * Returns the File object representing  the given URL.
+     *
+     * @param url
+     * @return
+     */
+    public static File toFile(URL url) {
+        if (url == null || !url.getProtocol().equals("file")) {
+            return null;
+        } else {
+            String filename = url.getFile().replace('/', File.separatorChar);
+            int pos = 0;
+            while ((pos = filename.indexOf('%', pos)) >= 0) {
+                if (pos + 2 < filename.length()) {
+                    String hexStr = filename.substring(pos + 1, pos + 3);
+                    char ch = (char)Integer.parseInt(hexStr, 16);
+                    filename = filename.substring(0, pos) + ch + filename.substring(pos + 3);
+                }
+            }
+            return new File(filename);
+        }
+    }
+
+    /**
+     * Returns the location of the classpath entry, JAR, WAR etc. containing the given class.
+     *
+     * @param clazz
+     * @return
+     */
+    public static URL codeLocation(Class<?> clazz) {
+        URL url = clazz.getProtectionDomain().getCodeSource().getLocation();
+        if (url == null) {
+            url = clazz.getResource("/" + clazz.getName().replace('.', '/') + ".class");
+        }
+        return url;
+    }
+
+    /**
+     * Returns a location string as a URL
+     * @param location
+     * @return
+     */
+    public static URL getLocationAsURL(String location) {
+        URI uri = IOHelper.createURI(location);
+        if (uri.getScheme() == null) {
+            uri = new File(location).toURI();
+        }
+        try {
+            return uri.toURL();
+        } catch (MalformedURLException e) {
+            throw new IllegalArgumentException(location, e);
+        }
+    }
+
+}