content: /*
   * Copyright (C) 2021 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 androidx.constraintlayout.core.parser;
  
  public class CLToken extends CLElement {
      int mIndex = 0;
      Type mType = Type.UNKNOWN;
  
      // @TODO: add description
      public boolean getBoolean() throws CLParsingException {
          if (mType == Type.TRUE) {
              return true;
          }
          if (mType == Type.FALSE) {
              return false;
          }
          throw new CLParsingException("this token is not a boolean: <" + content() + ">", this);
      }
  
      // @TODO: add description
      public boolean isNull() throws CLParsingException {
          if (mType == Type.NULL) {
              return true;
          }
          throw new CLParsingException("this token is not a null: <" + content() + ">", this);
      }
  
      enum Type {UNKNOWN, TRUE, FALSE, NULL}
  
      char[] mTokenTrue = "true".toCharArray();
      char[] mTokenFalse = "false".toCharArray();
      char[] mTokenNull = "null".toCharArray();
  
      public CLToken(char[] content) {
          super(content);
      }
  
      // @TODO: add description
      public static CLElement allocate(char[] content) {
          return new CLToken(content);
      }
  
      @Override
      protected String toJSON() {
          if (CLParser.sDebug) {
              return "<" + content() + ">";
          } else {
              return content();
          }
      }
  
      @Override
      protected String toFormattedJSON(int indent, int forceIndent) {
          StringBuilder json = new StringBuilder();
          addIndent(json, indent);
          json.append(content());
          return json.toString();
      }
  
      @SuppressWarnings("HiddenTypeParameter")
      public Type getType() {
          return mType;
      }
  
      // @TODO: add description
      public boolean validate(char c, long position) {
          boolean isValid = false;
          switch (mType) {
              case TRUE: {
                  isValid = (mTokenTrue[mIndex] == c);
                  if (isValid && mIndex + 1 == mTokenTrue.length) {
                      setEnd(position);
                  }
              }
              break;
              case FALSE: {
                  isValid = (mTokenFalse[mIndex] == c);
                  if (isValid && mIndex + 1 == mTokenFalse.length) {
                      setEnd(position);
                  }
              }
              break;
              case NULL: {
                  isValid = (mTokenNull[mIndex] == c);
                  if (isValid && mIndex + 1 == mTokenNull.length) {
                      setEnd(position);
                  }
              }
              break;
              case UNKNOWN: {
                  if (mTokenTrue[mIndex] == c) {
                      mType = Type.TRUE;
                      isValid = true;
                  } else if (mTokenFalse[mIndex] == c) {
                      mType = Type.FALSE;
                      isValid = true;
                  } else if (mTokenNull[mIndex] == c) {
                      mType = Type.NULL;
                      isValid = true;
                  }
              }
          }
  
          mIndex++;
          return isValid;
      }
  
  }
  