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Library that provides facilities to allow project information to be manipulated in Java and .Net. Supports a range of data formats: Microsoft Project Exchange (MPX), Microsoft Project (MPP,MPT), Microsoft Project Data Interchange (MSPDI XML), Microsoft Project Database (MPD), Planner (XML), Primavera (PM XML, XER, and database), Asta Powerproject (PP, MDB), Asta Easyplan (PP), Phoenix Project Manager (PPX), FastTrack Schedule (FTS), and the Standard Data Exchange Format (SDEF).

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/*
 * Copyright 2013 Jon Iles
 *
 * 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.rtfparserkit.parser;

import java.io.IOException;

/**
 * This is a hack... as a convenience it allows RTF data held in a string
 * to be parsed. The reason it's a hack is that RTF commands are used to
 * manage character encoding, and it's unlikely that the caller handled
 * this when they read the RTF in to the string from its original source.
 * It is also possible for an RTF file to contain raw binary data, which this
 * class will definitely not deal with. 
 * 
 * Having said all of that, in the vast majority of cases this approach
 * will work fine. It's also more efficient than creating an InputStream
 * from a String - which usually involves duplicating byte arrays. 
 */
public class RtfStringSource implements IRtfSource
{
   private final String data;
   private int index;

   public RtfStringSource(String data)
   {
      this.data = data;
   }

   @Override
   public int read() throws IOException
   {
      int result;

      if (index == data.length())
      {
         result = -1;
      }
      else
      {
         result = data.charAt(index++);
      }

      return result;
   }

   @Override
   public void unread(int c) throws IOException
   {
      if (index == 0)
      {
         throw new IOException("Unread not possible");
      }
      --index;
   }

   @Override
   public int read(byte[] b) throws IOException
   {
      throw new UnsupportedOperationException();
   }
}