1 files changed, 96 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/AugmentReference.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/AugmentReference.java
new file mode 100644
index 00000000..637795f3
--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/AugmentReference.java
@@ -0,0 +1,96 @@
+/*
+ *  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.tools.ant.taskdefs;
+
+import org.apache.tools.ant.Project;
+import org.apache.tools.ant.RuntimeConfigurable;
+import org.apache.tools.ant.Task;
+import org.apache.tools.ant.TypeAdapter;
+
+/**
+ * Ant task to dynamically augment a previously declared reference.
+ * @since Ant 1.8.1
+ */
+public class AugmentReference extends Task implements TypeAdapter {
+    private String id;
+
+    /**
+     * {@inheritDoc}
+     */
+    public void checkProxyClass(Class<?> proxyClass) {
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public synchronized Object getProxy() {
+        if (getProject() == null) {
+            throw new IllegalStateException(getTaskName() + "Project owner unset");
+        }
+        hijackId();
+        if (getProject().hasReference(id)) {
+            Object result = getProject().getReference(id);
+            log("project reference " + id + "=" + String.valueOf(result), Project.MSG_DEBUG);
+            return result;
+        }
+        throw new IllegalStateException("Unknown reference \"" + id + "\"");
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public void setProxy(Object o) {
+        throw new UnsupportedOperationException();
+    }
+
+    private synchronized void hijackId() {
+        if (id == null) {
+            RuntimeConfigurable wrapper = getWrapper();
+            id = wrapper.getId();
+            if (id == null) {
+                throw new IllegalStateException(getTaskName() + " attribute 'id' unset");
+            }
+            wrapper.setAttribute("id", null);
+            wrapper.removeAttribute("id");
+            wrapper.setElementTag("augmented reference \"" + id + "\"");
+        }
+    }
+
+    /**
+     * Overridden to restore the wrapper once it is no longer needed.
+     * @since Ant 1.8.3
+     */
+    public void execute() {
+        restoreWrapperId();
+    }
+
+    /**
+     * Needed if two different targets reuse the same instance.
+     * @see "https://issues.apache.org/bugzilla/show_bug.cgi?id=50894"
+     */
+    private synchronized void restoreWrapperId() {
+        if (id != null) {
+            log("restoring augment wrapper " + id, Project.MSG_DEBUG);
+            RuntimeConfigurable wrapper = getWrapper();
+            wrapper.setAttribute("id", id);
+            wrapper.setElementTag(getTaskName());
+            id = null;
+        }
+    }
+
+}