content: /*
   * Copyright (C) 2010 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.
   */
  package com.android.vcard;
  
  import java.util.Set;
  
  
  /**
   * <p>
   * Basic implementation parsing vCard 4.0.
   * </p>
   * <p>
   * vCard 4.0 is not published yet. Also this implementation is premature.
   * </p>
   * @hide
   */
  /* package */ class VCardParserImpl_V40 extends VCardParserImpl_V30 {
      // private static final String LOG_TAG = VCardConstants.LOG_TAG;
  
      public VCardParserImpl_V40() {
          super();
      }
  
      public VCardParserImpl_V40(final int vcardType) {
          super(vcardType);
      }
  
      @Override
      protected int getVersion() {
          return VCardConfig.VERSION_40;
      }
  
      @Override
      protected String getVersionString() {
          return VCardConstants.VERSION_V40;
      }
  
      /**
       * We escape "\N" into new line for safety.
       */
      @Override
      protected String maybeUnescapeText(final String text) {
          return unescapeText(text);
      }
  
      public static String unescapeText(final String text) {
          // TODO: more strictly, vCard 4.0 requires different type of unescaping rule
          //       toward each property.
          final StringBuilder builder = new StringBuilder();
          final int length = text.length();
          for (int i = 0; i < length; i++) {
              char ch = text.charAt(i);
              if (ch == '\\' && i < length - 1) {
                  final char next_ch = text.charAt(++i);
                  if (next_ch == 'n' || next_ch == 'N') {
                      builder.append("\n");
                  } else {
                      builder.append(next_ch);
                  }
              } else {
                  builder.append(ch);
              }
          }
          return builder.toString();
      }
  
      public static String unescapeCharacter(final char ch) {
          if (ch == 'n' || ch == 'N') {
              return "\n";
          } else {
              return String.valueOf(ch);
          }
      }
  
      @Override
      protected Set<String> getKnownPropertyNameSet() {
          return VCardParser_V40.sKnownPropertyNameSet;
      }
  }