001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.juneau;
018
019import java.io.*;
020
021/**
022 * A StringReader with a usable close() method.
023 */
024public class CloseableStringReader extends StringReader {
025   boolean isClosed;
026
027   public CloseableStringReader(String in) {
028      super(in);
029   }
030
031   private void checkOpen() {
032      if (isClosed)
033         throw new IllegalStateException("Reader is closed");
034   }
035
036   @Override
037   public void close() {
038      isClosed = true;
039   }
040
041   @Override
042   public int read() throws IOException {
043      checkOpen();
044      return super.read();
045   }
046
047   @Override
048   public int read(char[] cbuf, int off, int len) throws IOException {
049      checkOpen();
050      return super.read(cbuf, off, len);
051   }
052}