File: AnnotationProcessor.h

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/*
 * 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.
 */

#ifndef AAPT_JAVA_ANNOTATIONPROCESSOR_H
#define AAPT_JAVA_ANNOTATIONPROCESSOR_H

#include "util/StringPiece.h"

#include <sstream>
#include <string>

namespace aapt {

/**
 * Builds a JavaDoc comment from a set of XML comments.
 * This will also look for instances of @SystemApi and convert them to
 * actual Java annotations.
 *
 * Example:
 *
 * Input XML:
 *
 * <!-- This is meant to be hidden because
 *      It is system api. Also it is @deprecated
 *      @SystemApi
 *      -->
 *
 * Output JavaDoc:
 *
 *  /\*
 *   * This is meant to be hidden because
 *   * It is system api. Also it is @deprecated
 *   *\/
 *
 * Output Annotations:
 *
 * @Deprecated
 * @android.annotation.SystemApi
 *
 */
class AnnotationProcessor {
public:
    /**
     * Adds more comments. Since resources can have various values with different configurations,
     * we need to collect all the comments.
     */
    void appendComment(const StringPiece16& comment);
    void appendComment(const StringPiece& comment);

    void appendNewLine();

    /**
     * Writes the comments and annotations to the stream, with the given prefix before each line.
     */
    void writeToStream(std::ostream* out, const StringPiece& prefix) const;

private:
    enum : uint32_t {
        kDeprecated = 0x01,
        kSystemApi = 0x02,
    };

    std::stringstream mComment;
    std::stringstream mAnnotations;
    bool mHasComments = false;
    uint32_t mAnnotationBitMask = 0;

    void appendCommentLine(std::string& line);
};

} // namespace aapt

#endif /* AAPT_JAVA_ANNOTATIONPROCESSOR_H */