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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.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * Implementation of IRtfSource which will read the RTF file from a stream.
 */
public class RtfStreamSource implements IRtfSource
{
   private final InputStream stream;
   private int pushBackChar = -1;

   public RtfStreamSource(InputStream stream)
   {
      if (stream instanceof BufferedInputStream)
      {
         this.stream = stream;
      }
      else
      {
         this.stream = new BufferedInputStream(stream);
      }
   }

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

      if (pushBackChar != -1)
      {
         result = pushBackChar;
         pushBackChar = -1;
      }
      else
      {
         result = stream.read();
      }

      return result;
   }

   @Override
   public void unread(int c) throws IOException
   {
      if (pushBackChar != -1)
      {
         throw new IOException("Unread not possible");
      }

      pushBackChar = c;
   }

   @Override
   public int read(byte[] b) throws IOException
   {
      return stream.read(b);
   }
}