--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/jdk.jshell/share/classes/jdk/jshell/ClassTracker.java Mon Oct 19 19:15:16 2015 +0200
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. 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. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jshell;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import com.sun.jdi.ReferenceType;
+
+/**
+ * Tracks the state of a class through compilation and loading in the remote
+ * environment.
+ *
+ * @author Robert Field
+ */
+class ClassTracker {
+
+ private final JShell state;
+ private final HashMap<String, ClassInfo> map;
+
+ ClassTracker(JShell state) {
+ this.state = state;
+ this.map = new HashMap<>();
+ }
+
+ class ClassInfo {
+
+ private final String className;
+ private byte[] bytes;
+ private byte[] loadedBytes;
+ private ReferenceType rt;
+
+ private ClassInfo(String className) {
+ this.className = className;
+ }
+
+ String getClassName() {
+ return className;
+ }
+
+ byte[] getBytes() {
+ return bytes;
+ }
+
+ void setBytes(byte[] bytes) {
+ this.bytes = bytes;
+ }
+
+ void setLoaded() {
+ loadedBytes = bytes;
+ }
+
+ boolean isLoaded() {
+ return Arrays.equals(loadedBytes, bytes);
+ }
+
+ ReferenceType getReferenceTypeOrNull() {
+ if (rt == null) {
+ rt = state.executionControl().nameToRef(className);
+ }
+ return rt;
+ }
+ }
+
+ ClassInfo classInfo(String className, byte[] bytes) {
+ ClassInfo ci = map.computeIfAbsent(className, k -> new ClassInfo(k));
+ ci.setBytes(bytes);
+ return ci;
+ }
+
+ ClassInfo get(String className) {
+ return map.get(className);
+ }
+
+}