Android Open Source - RadaeePDF-B4A P D F Asset Stream

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License

The source code is released under:

Apache License

Java Source Code

package com.radaee.util;
//w  w  w. ja va 2 s  . co m
import android.content.res.AssetManager;
import android.util.Log;
import com.radaee.pdf.Document.PDFStream;
import java.io.InputStream;

/**
 * Asset stream, an implement class for PDFStream, which used in Document.OpenStream
 * @author radaee
 */
public class PDFAssetStream implements PDFStream
{
  private InputStream m_stream;
  private int m_pos;
  private int m_len;
  public boolean open( AssetManager assets, String symbol )
  {
    try
    {
      m_stream = assets.open(symbol);
      seek(0x7FFFFFFF);
      m_len = m_pos;
      m_pos = 0;
      seek(0);
      return true;
    }
    catch( Exception e )
    {
      return false;
    }
  }
  public void close()
  {
    try
    {
      m_stream.close();
    }
    catch( Exception e )
    {
    }
    m_stream = null;
  }
  public boolean writeable()
  {
    return false;
  }
  public int get_size()
  {
    return m_len;
  }

  public int read(byte[] data)
  {
    try
    {
      int len = m_stream.read(data);
      if( len < 0 )
        return 0;
      else
      {
        m_pos += len;
        return len;
      }
    }
    catch( Exception e )
    {
      Log.d("read", e.getMessage());
      return 0;
    }
  }

  public int write(byte[] data)
  {
    return 0;
  }

  public void seek(int pos)
  {
    try
    {
      m_stream.reset();
      m_pos = (int)m_stream.skip(pos);
    }
    catch( Exception e )
    {
      if( e != null )
      {
        String err = e.getMessage();
        if( err != null )
          Log.d("seek", err);
      }
    }
  }

  public int tell()
  {
      return m_pos;
  }
}

Java Source Code List

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