package org.apg; import java.io.IOException; import java.io.InputStream; public class PositionAwareInputStream extends InputStream { private InputStream mStream; private long mPosition; public PositionAwareInputStream(InputStream in) { mStream = in; mPosition = 0; } @Override public int read() throws IOException { int ch = mStream.read(); ++mPosition; return ch; } @Override public int available() throws IOException { return mStream.available(); } @Override public void close() throws IOException { mStream.close(); } @Override public boolean markSupported() { return false; } @Override public int read(byte[] b) throws IOException { int result = mStream.read(b); mPosition += result; return result; } @Override public int read(byte[] b, int offset, int length) throws IOException { int result = mStream.read(b, offset, length); mPosition += result; return result; } @Override public synchronized void reset() throws IOException { mStream.reset(); mPosition = 0; } @Override public long skip(long n) throws IOException { long result = mStream.skip(n); mPosition += result; return result; } public long position() { return mPosition; } }