How to use

containsAnnotation

method

in

com.sun.enterprise.deployment.annotation.introspection.ClassFile

  protected boolean containsAnnotation(InputStream is, long size) 
    throws IOException {
    boolean result = false;
    // check if it contains top level annotations...
    ReadableByteChannel channel = null;
    try {
      channel = Channels.newChannel(is);
      if (channel!=null) {
        result = classFile.containsAnnotation(channel, size);
       }
       return result;
    } finally {
      if (channel != null) {
        channel.close();
      }
    }
  }
}

  protected boolean containsAnnotation(InputStream is, long size) 
    throws IOException {
    boolean result = false;
    // check if it contains top level annotations...
    ReadableByteChannel channel = null;
    try {
      channel = Channels.newChannel(is);
      if (channel!=null) {
        result = classFile.containsAnnotation(channel, size);
       }
       return result;
    } finally {
      if (channel != null) {
        channel.close();
      }
    }
  }
}

/**
 * Read the input channel and initialize instance data
 * structure.
 */public boolean containsAnnotation(ReadableByteChannel in, long size) throws IOException {
  header.clear();
  if (size!=-1 && size>header.capacity()) {
    // time to expand...
    header = ByteBuffer.allocate((int) size);
  }
  long read = (long) in.read(header);
  if (size!=-1 && read!=size) {
    return false;
  }
  header.rewind();
  return containsAnnotation(header);
}

/**
 * Read the input channel and initialize instance data
 * structure.
 */public boolean containsAnnotation(ReadableByteChannel in, long size) throws IOException {
  header.clear();
  if (size!=-1 && size>header.capacity()) {
    // time to expand...
    header = ByteBuffer.allocate((int) size);
  }
  long read = (long) in.read(header);
  if (size!=-1 && read!=size) {
    return false;
  }
  header.rewind();
  return containsAnnotation(header);
}

private boolean containsAnnotation(final ByteBuffer headerBuffer) throws IOException {
  /**
   * this is the .class file layout
   *
  ClassFile {
    u4 magic;
    u2 minor_version;
    u2 major_version;
    u2 constant_pool_count;
    cp_info constant_pool[constant_pool_count-1];
    u2 access_flags;
    u2 this_class;
    u2 super_class;
    u2 interfaces_count;
    u2 interfaces[interfaces_count];
    u2 fields_count;
    field_info fields[fields_count];
    u2 methods_count;
    method_info methods[methods_count];
    u2 attributes_count;
    attribute_info attributes[attributes_count];
  }        
   **/
      
  if (headerBuffer.getInt()!=magic) {
    return false;
  }
  

private boolean containsAnnotation(final ByteBuffer headerBuffer) throws IOException {
  /**
   * this is the .class file layout
   *
  ClassFile {
    u4 magic;
    u2 minor_version;
    u2 major_version;
    u2 constant_pool_count;
    cp_info constant_pool[constant_pool_count-1];
    u2 access_flags;
    u2 this_class;
    u2 super_class;
    u2 interfaces_count;
    u2 interfaces[interfaces_count];
    u2 fields_count;
    field_info fields[fields_count];
    u2 methods_count;
    method_info methods[methods_count];
    u2 attributes_count;
    attribute_info attributes[attributes_count];
  }        
   **/
      
  if (headerBuffer.getInt()!=magic) {
    return false;
  }
  

  baos.write(buffer, 0, bytesRead);
if (classFile.containsAnnotation(baos.toByteArray())) {
  addEntry(je);