AAPT2: Support generating Manifest.java

This includes comments from AndroidManifest.xml.

Change-Id: I412d9ecb12bad20a49a683d6b3bea4a0be1235ae

tools/aapt2/java/AnnotationProcessor.cpp

@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#include "java/AnnotationProcessor.h"
+#include "util/Util.h"
+
+#include <algorithm>
+
+namespace aapt {
+
+void AnnotationProcessor::appendCommentLine(const StringPiece16& line) {
+    static const std::string sDeprecated = "@deprecated";
+    static const std::string sSystemApi = "@SystemApi";
+
+    if (line.empty()) {
+        return;
+    }
+
+    std::string comment = util::utf16ToUtf8(line);
+
+    if (comment.find(sDeprecated) != std::string::npos && !mDeprecated) {
+        mDeprecated = true;
+        if (!mAnnotations.empty()) {
+            mAnnotations += "\n";
+        }
+        mAnnotations += mPrefix;
+        mAnnotations += "@Deprecated";
+    }
+
+    if (comment.find(sSystemApi) != std::string::npos && !mSystemApi) {
+        mSystemApi = true;
+        if (!mAnnotations.empty()) {
+            mAnnotations += "\n";
+        }
+        mAnnotations += mPrefix;
+        mAnnotations += "@android.annotations.SystemApi";
+    }
+
+    if (mComment.empty()) {
+        mComment += mPrefix;
+        mComment += "/**";
+    }
+
+    mComment += "\n";
+    mComment += mPrefix;
+    mComment += " * ";
+    mComment += std::move(comment);
+}
+
+void AnnotationProcessor::appendComment(const StringPiece16& comment) {
+    // We need to process line by line to clean-up whitespace and append prefixes.
+    for (StringPiece16 line : util::tokenize(comment, u'\n')) {
+        appendCommentLine(util::trimWhitespace(line));
+    }
+}
+
+std::string AnnotationProcessor::buildComment() {
+    mComment += "\n";
+    mComment += mPrefix;
+    mComment += " */";
+    return std::move(mComment);
+}
+
+std::string AnnotationProcessor::buildAnnotations() {
+    return std::move(mAnnotations);
+}
+
+} // namespace aapt