1 files changed, 158 insertions, 0 deletions
diff --git a/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JarClassLoader.java b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JarClassLoader.java
new file mode 100644
index 0000000..a6d3e13
--- /dev/null
+++ b/trunk/infrastructure/yuicompressor/src/com/yahoo/platform/yui/compressor/JarClassLoader.java
@@ -0,0 +1,158 @@
+/*
+ * YUI Compressor
+ * Author: Julien Lecomte <jlecomte@yahoo-inc.com>
+ * Copyright (c) 2007, Yahoo! Inc. All rights reserved.
+ * Code licensed under the BSD License:
+ *     http://developer.yahoo.net/yui/license.txt
+ */
+
+package com.yahoo.platform.yui.compressor;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.Enumeration;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+
+public class JarClassLoader extends ClassLoader {
+
+    private static String jarPath;
+
+    public Class loadClass(String name) throws ClassNotFoundException {
+
+        // First check if the class is already loaded
+        Class c = findLoadedClass(name);
+        if (c == null) {
+            c = findClass(name);
+        }
+
+        if (c == null) {
+            c = ClassLoader.getSystemClassLoader().loadClass(name);
+        }
+
+        return c;
+    }
+
+    private static String getJarPath() {
+
+        if (jarPath != null) {
+            return jarPath;
+        }
+
+        String classname = JarClassLoader.class.getName().replace('.', '/') + ".class";
+        String classpath = System.getProperty("java.class.path");
+        String classpaths[] = classpath.split(System.getProperty("path.separator"));
+
+        for (int i = 0; i < classpaths.length; i++) {
+
+            String path = classpaths[i];
+            JarFile jarFile = null;
+            JarEntry jarEntry = null;
+
+            try {
+                jarFile = new JarFile(path);
+                jarEntry = findJarEntry(jarFile, classname);
+            } catch (IOException ioe) {
+                /* ignore */
+            } finally {
+                if (jarFile != null) {
+                    try {
+                        jarFile.close();
+                    } catch (IOException ioe) {
+                        /* ignore */
+                    }
+                }
+            }
+
+            if (jarEntry != null) {
+                jarPath = path;
+                break;
+            }
+        }
+
+        return jarPath;
+    }
+
+    private static JarEntry findJarEntry(JarFile jarFile, String entryName) {
+
+        Enumeration entries = jarFile.entries();
+
+        while (entries.hasMoreElements()) {
+            JarEntry entry = (JarEntry) entries.nextElement();
+            if (entry.getName().equals(entryName)) {
+                return entry;
+            }
+        }
+
+        return null;
+    }
+
+    protected Class findClass(String name) {
+
+        Class c = null;
+        String jarPath = getJarPath();
+
+        if (jarPath != null) {
+            JarFile jarFile = null;
+            try {
+                jarFile = new JarFile(jarPath);
+                c = loadClassData(jarFile, name);
+            } catch (IOException ioe) {
+                /* ignore */
+            } finally {
+                if (jarFile != null) {
+                    try {
+                        jarFile.close();
+                    } catch (IOException ioe) {
+                        /* ignore */
+                    }
+                }
+            }
+        }
+
+        return c;
+    }
+
+    private Class loadClassData(JarFile jarFile, String className) {
+
+        String entryName = className.replace('.', '/') + ".class";
+        JarEntry jarEntry = findJarEntry(jarFile, entryName);
+        if (jarEntry == null) {
+            return null;
+        }
+
+        // Create the necessary package if needed...
+        int index = className.lastIndexOf('.');
+        if (index >= 0) {
+            String packageName = className.substring(0, index);
+            if (getPackage(packageName) == null) {
+                definePackage(packageName, "", "", "", "", "", "", null);
+            }
+        }
+
+        // Read the Jar File entry and define the class...
+        Class c = null;
+        try {
+            InputStream is = jarFile.getInputStream(jarEntry);
+            ByteArrayOutputStream os = new ByteArrayOutputStream();
+            copy(is, os);
+            byte[] bytes = os.toByteArray();
+            c = defineClass(className, bytes, 0, bytes.length);
+        } catch (IOException ioe) {
+            /* ignore */
+        }
+
+        return c;
+    }
+
+    private void copy(InputStream in, OutputStream out) throws IOException {
+        byte[] buf = new byte[1024];
+        while (true) {
+            int len = in.read(buf);
+            if (len < 0) break;
+            out.write(buf, 0, len);
+        }
+    }
+}
+\ No newline at end of file