package com.fasterxml.jackson.databind.util; import java.io.IOException; import java.io.InputStream; import java.nio.ByteBuffer; /** * Simple {@link InputStream} implementation that exposes currently * available content of a {@link ByteBuffer}. */ public class ByteBufferBackedInputStream extends InputStream { protected final ByteBuffer _b; public ByteBufferBackedInputStream(ByteBuffer buf) { _b = buf; } @Override public int available() { return _b.remaining(); } @Override public int read() throws IOException { return _b.hasRemaining() ? (_b.get() & 0xFF) : -1; } @Override public int read(byte[] bytes, int off, int len) throws IOException { if (!_b.hasRemaining()) return -1; len = Math.min(len, _b.remaining()); _b.get(bytes, off, len); return len; } }