/*
    *    Copyright 2009-2023 the original author or authors.
    *
    *    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
    *
    *       https://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 org.apache.ibatis.reflection.property;
  
  import java.util.Iterator;
  
  /**
   * @author Clinton Begin
   */
  public class PropertyTokenizer implements Iterator<PropertyTokenizer> {
    private String name;
    private final String indexedName;
    private String index;
    private final String children;
  
    public PropertyTokenizer(String fullname) {
      int delim = fullname.indexOf('.');
      if (delim > -1) {
        name = fullname.substring(0, delim);
        children = fullname.substring(delim + 1);
      } else {
        name = fullname;
        children = null;
      }
      indexedName = name;
      delim = name.indexOf('[');
      if (delim > -1) {
        index = name.substring(delim + 1, name.length() - 1);
        name = name.substring(0, delim);
      }
    }
  
    public String getName() {
      return name;
    }
  
    public String getIndex() {
      return index;
    }
  
    public String getIndexedName() {
      return indexedName;
    }
  
    public String getChildren() {
      return children;
    }
  
    @Override
    public boolean hasNext() {
      return children != null;
    }
  
    @Override
    public PropertyTokenizer next() {
      return new PropertyTokenizer(children);
    }
  
    @Override
    public void remove() {
      throw new UnsupportedOperationException(
          "Remove is not supported, as it has no meaning in the context of properties.");
    }
  }