content: /*
   * Copyright (C) 2010 Google Inc.
   *
   * 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.airbnb.lottie.parser.moshi;
  
  /**
   * Lexical scoping elements within a JSON reader or writer.
   */
  final class JsonScope {
    private JsonScope() {
    }
  
    /**
     * An array with no elements requires no separators or newlines before it is closed.
     */
    static final int EMPTY_ARRAY = 1;
  
    /**
     * A array with at least one value requires a comma and newline before the next element.
     */
    static final int NONEMPTY_ARRAY = 2;
  
    /**
     * An object with no name/value pairs requires no separators or newlines before it is closed.
     */
    static final int EMPTY_OBJECT = 3;
  
    /**
     * An object whose most recent element is a key. The next element must be a value.
     */
    static final int DANGLING_NAME = 4;
  
    /**
     * An object with at least one name/value pair requires a separator before the next element.
     */
    static final int NONEMPTY_OBJECT = 5;
  
    /**
     * No object or array has been started.
     */
    static final int EMPTY_DOCUMENT = 6;
  
    /**
     * A document with at an array or object.
     */
    static final int NONEMPTY_DOCUMENT = 7;
  
    /**
     * A document that's been closed and cannot be accessed.
     */
    static final int CLOSED = 8;
  
    /**
     * Renders the path in a JSON document to a string. The {@code pathNames} and {@code pathIndices}
     * parameters corresponds directly to stack: At indices where the stack contains an object
     * (EMPTY_OBJECT, DANGLING_NAME or NONEMPTY_OBJECT), pathNames contains the name at this scope.
     * Where it contains an array (EMPTY_ARRAY, NONEMPTY_ARRAY) pathIndices contains the current index
     * in that array. Otherwise the value is undefined, and we take advantage of that by incrementing
     * pathIndices when doing so isn't useful.
     */
    static String getPath(int stackSize, int[] stack, String[] pathNames, int[] pathIndices) {
      StringBuilder result = new StringBuilder().append('$');
      for (int i = 0; i < stackSize; i++) {
        switch (stack[i]) {
          case EMPTY_ARRAY:
          case NONEMPTY_ARRAY:
            result.append('[').append(pathIndices[i]).append(']');
            break;
  
          case EMPTY_OBJECT:
          case DANGLING_NAME:
          case NONEMPTY_OBJECT:
            result.append('.');
            if (pathNames[i] != null) {
              result.append(pathNames[i]);
            }
            break;
  
          case NONEMPTY_DOCUMENT:
          case EMPTY_DOCUMENT:
          case CLOSED:
            break;
        }
      }
      return result.toString();
    }
  }