/*
 * 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 com.sun.org.apache.regexp.internal;

/**
 * Encapsulates different types of character sources - String, InputStream, ...
 * Defines a set of common methods
 *
 * @author <a href="mailto:ales.novak@netbeans.com">Ales Novak</a>
 * @version CVS $Id: CharacterIterator.java,v 1.1.2.1 2005/08/01 00:02:54 jeffsuttor Exp $
 */
public interface CharacterIterator
{
    /** @return a substring */
    String substring(int beginIndex, int endIndex);

    /** @return a substring */
    String substring(int beginIndex);

    /** @return a character at the specified position. */
    char charAt(int pos);

    /** @return <tt>true</tt> iff if the specified index is after the end of the character stream */
    boolean isEnd(int pos);
}