content: /*
   * Copyright 1999-2004 The Apache Software Foundation.
   *
   * 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 org.apache.regexp;
  
  /**
   * Encapsulates char[] as CharacterIterator
   *
   * @author <a href="mailto:ales.novak@netbeans.com">Ales Novak</a>
   * @version CVS $Id: CharacterArrayCharacterIterator.java 126148 2004-02-17 13:37:54Z vgritsenko $
   */
  public final class CharacterArrayCharacterIterator implements CharacterIterator
  {
      /** encapsulated */
      private final char[] src;
      /** offset in the char array */
      private final int off;
      /** used portion of the array */
      private final int len;
  
      /** @param src - encapsulated String */
      public CharacterArrayCharacterIterator(char[] src, int off, int len)
      {
          this.src = src;
          this.off = off;
          this.len = len;
      }
  
      /** @return a substring */
      public String substring(int beginIndex, int endIndex)
      {
          if (endIndex > len) {
              throw new IndexOutOfBoundsException("endIndex=" + endIndex
                                                  + "; sequence size=" + len);
          }
          if (beginIndex < 0 || beginIndex > endIndex) {
              throw new IndexOutOfBoundsException("beginIndex=" + beginIndex
                                                  + "; endIndex=" + endIndex);
          }
          return new String(src, off + beginIndex, endIndex - beginIndex);
      }
  
      /** @return a substring */
      public String substring(int beginIndex)
      {
          return substring(beginIndex, len);
      }
  
      /** @return a character at the specified position. */
      public char charAt(int pos)
      {
          return src[off + pos];
      }
  
      /** @return <tt>true</tt> iff if the specified index is after the end of the character stream */
      public boolean isEnd(int pos)
      {
          return (pos >= len);
      }
  }
  