content: /**
   *  Copyright (C) 2018 Ryszard Wiśniewski <brut.alll@gmail.com>
   *  Copyright (C) 2018 Connor Tumbleson <connor.tumbleson@gmail.com>
   *
   *  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 brut.androlib.res.data.value;
  
  import brut.androlib.AndrolibException;
  import brut.androlib.err.UndefinedResObject;
  import brut.androlib.res.data.ResPackage;
  import brut.androlib.res.data.ResResSpec;
  
  /**
   * @author Ryszard Wiśniewski <brut.alll@gmail.com>
   */
  public class ResReferenceValue extends ResIntValue {
      private final ResPackage mPackage;
      private final boolean mTheme;
  
      public ResReferenceValue(ResPackage package_, int value, String rawValue) {
          this(package_, value, rawValue, false);
      }
  
      public ResReferenceValue(ResPackage package_, int value, String rawValue,
                               boolean theme) {
          super(value, rawValue, "reference");
          mPackage = package_;
          mTheme = theme;
      }
  
      @Override
      protected String encodeAsResXml() throws AndrolibException {
          if (isNull()) {
              return "@null";
          }
  
          ResResSpec spec = getReferent();
          if (spec == null) {
              return "@null";
          }
          boolean newId = spec.hasDefaultResource() && spec.getDefaultResource().getValue() instanceof ResIdValue;
  
          // generate the beginning to fix @android
          String mStart = (mTheme ? '?' : '@') + (newId ? "+" : "");
  
          return mStart + spec.getFullName(mPackage, mTheme && spec.getType().getName().equals("attr"));
      }
  
      public ResResSpec getReferent() throws AndrolibException {
          try {
              return mPackage.getResTable().getResSpec(getValue());
          } catch (UndefinedResObject ex) {
              return null;
          }
      }
  
      public boolean isNull() {
          return mValue == 0;
      }
  
      public boolean referentIsNull() throws AndrolibException {
          return getReferent() == null;
      }
  }
  