| /* |
| * 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 |
| * |
| * https://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.BuildException; |
| 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 BuildException("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 BuildException(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; |
| } |
| } |
| |
| } |