new files for version 2.5.

git-svn-id: http://anonsvn.jboss.org/repos/javassist/trunk@10 30ef5769-5b8d-40dd-aea6-55b5d6557bb3

1 files changed, 72 insertions, 0 deletions

diff --git a/src/main/javassist/LoaderClassPath.java b/src/main/javassist/LoaderClassPath.java
new file mode 100644
index 00000000..6407e46d
--- /dev/null
+++ b/src/main/javassist/LoaderClassPath.java
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+/*
+ * Javassist, a Java-bytecode translator toolkit.
+ * Copyright (C) 1999-2003 Shigeru Chiba. All Rights Reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ */
+package javassist;
+
+import java.io.InputStream;
+import java.lang.ref.WeakReference;
+
+/**
+ * A class search-path representing a class loader.
+ *
+ * <p>It is used for obtaining a class file from the given
+ * class loader by <code>getResourceAsStream()</code>.
+ * The <code>LoaderClassPath</code> refers to the class loader through
+ * <code>WeakReference</code>.  If the class loader is garbage collected,
+ * the other search pathes are examined.
+ *
+ * @author <a href="mailto:bill@jboss.org">Bill Burke</a>
+ * @author Shigeru Chiba
+ *
+ * @see javassist.ClassPath
+ * @see ClassPool#insertClassPath(ClassPath)
+ * @see ClassPool#appendClassPath(ClassPath)
+ */
+public class LoaderClassPath implements ClassPath {
+    private WeakReference clref;
+
+    /**
+     * Creates a search path representing a class loader.
+     */
+    public LoaderClassPath(ClassLoader cl) {
+        clref = new WeakReference(cl);
+    }
+
+    public String toString() {
+        Object cl = null;
+        if (clref != null)
+            cl = clref.get();
+
+        return cl == null ? "<null>" : cl.toString();
+    }
+
+    /**
+     * Obtains a class file from the class loader.
+     */
+    public InputStream openClassfile(String classname) {
+        String cname = classname.replace('.', '/') + ".class";
+        ClassLoader cl = (ClassLoader)clref.get();
+        if (cl == null)
+            return null;        // not found
+        else
+            return cl.getResourceAsStream(cname);
+    }
+
+    /**
+     * Closes this class path.
+     */
+    public void close() {
+        clref = null;
+    }
+}