1 files changed, 119 insertions, 0 deletions
diff --git a/src/java_tools/buildjar/java/com/google/devtools/build/buildjar/AbstractPostProcessor.java b/src/java_tools/buildjar/java/com/google/devtools/build/buildjar/AbstractPostProcessor.java
new file mode 100644
index 0000000000..e8e608d44b
--- /dev/null
+++ b/src/java_tools/buildjar/java/com/google/devtools/build/buildjar/AbstractPostProcessor.java
@@ -0,0 +1,119 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed 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 com.google.devtools.build.buildjar;
+
+import com.google.common.base.Preconditions;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * A processor to apply additional steps to the compiled java classes. It can be used to add code
+ * coverage instrumentation for instance.
+ */
+public abstract class AbstractPostProcessor {
+  private static final Map<String, AbstractPostProcessor> postProcessors = new HashMap<>();
+
+  /**
+   * Declares a post processor with a name. This name serves as the command line argument to
+   * reference a processor.
+   *
+   * @param name the command line name of the processor
+   * @param postProcessor the post processor object
+   */
+  public static void addPostProcessor(String name, AbstractPostProcessor postProcessor) {
+    postProcessors.put(name, postProcessor);
+  }
+
+  private String workingDir = null;
+  private JavaLibraryBuildRequest build = null;
+
+  /**
+   * Sets the command line arguments for this processor.
+   *
+   * @param arguments the list of arguments
+   *
+   * @throws InvalidCommandLineException when the list of arguments for this processors is
+   *         incorrect.
+   */
+  public abstract void setCommandLineArguments(List<String> arguments)
+      throws InvalidCommandLineException;
+
+  /**
+   * This initializer is outside of the constructor so the arguments are not passed to the
+   * descendants.
+   */
+  void initialize(JavaLibraryBuildRequest build) {
+    this.build = build;
+  }
+
+  protected String workingPath(String name) {
+    Preconditions.checkNotNull(this.build);
+    return workingDir != null && name.length() > 0 && name.charAt(0) != '/'
+        ? workingDir + File.separator + name
+        : name;
+  }
+
+  protected boolean shouldCompressJar() {
+    return build.compressJar();
+  }
+
+  protected String getBuildClassDir() {
+    return build.getClassDir();
+  }
+
+  /**
+   * Main interface method of the post processor.
+   */
+  public abstract void processRequest() throws IOException;
+
+  /**
+   * Create an {@link AbstractPostProcessor} using reflection.
+   *
+   * @param processorName the name of the processor to instantiate. It should exist in the list of
+   *        post processors added with the {@link #addPostProcessor(String, AbstractPostProcessor)}
+   *        method.
+   * @param arguments the list of arguments that should be passed to the processor during
+   *        instantiation.
+   * @throws InvalidCommandLineException on error creating the processor
+   */
+  static AbstractPostProcessor create(String processorName, List<String> arguments)
+      throws InvalidCommandLineException {
+    AbstractPostProcessor processor = postProcessors.get(processorName);
+    if (processor == null) {
+      throw new InvalidCommandLineException("No such processor '" + processorName + "'");
+    }
+    processor.setCommandLineArguments(arguments);
+    return processor;
+  }
+
+  /**
+   * Recursively delete the given file, it is unsafe.
+   *
+   * @param file the file to recursively remove
+   */
+  protected static void recursiveRemove(File file) {
+    if (file.isDirectory()) {
+      for (File f : file.listFiles()) {
+        recursiveRemove(f);
+      }
+    } else if (file.exists()) {
+      file.delete();
+    }
+  }
+}