Initial load

langtools/test/tools/javac/api/evalexpr/ByteArrayClassLoader.java

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+/*
+ * Copyright 2005 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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 General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package evalexpr;
+
+import java.util.Map;
+
+/**
+ * A class loader which loads classes from byte arrays.
+ *
+ * <p><b>This is NOT part of any API supported by Sun Microsystems.
+ * If you write code that depends on this, you do so at your own
+ * risk.  This code and its internal interfaces are subject to change
+ * or deletion without notice.</b></p>
+ * @author Peter von der Ah&eacute;
+ */
+public class ByteArrayClassLoader extends ClassLoader {
+    /**
+     * Maps binary class names to class files stored as byte arrays.
+     */
+    private Map<String, byte[]> classes;
+
+    /**
+     * Creates a new instance of ByteArrayClassLoader
+     * @param classes a map from binary class names to class files stored as byte arrays
+     */
+    public ByteArrayClassLoader(Map<String, byte[]> classes) {
+        this.classes = classes;
+    }
+
+    @Override
+    public Class<?> loadClass(String name) throws ClassNotFoundException {
+        try {
+            return super.loadClass(name);
+        } catch (ClassNotFoundException e) {
+            byte[] classData = classes.get(name);
+            return defineClass(name, classData, 0, classData.length);
+        }
+    }
+}