001 /* 002 * JBoss, Home of Professional Open Source. 003 * Copyright 2008, Red Hat Middleware LLC, and individual contributors 004 * as indicated by the @author tags. See the copyright.txt file in the 005 * distribution for a full listing of individual contributors. 006 * 007 * This is free software; you can redistribute it and/or modify it 008 * under the terms of the GNU Lesser General Public License as 009 * published by the Free Software Foundation; either version 2.1 of 010 * the License, or (at your option) any later version. 011 * 012 * This software is distributed in the hope that it will be useful, 013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 015 * Lesser General Public License for more details. 016 * 017 * You should have received a copy of the GNU Lesser General Public 018 * License along with this software; if not, write to the Free 019 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 020 * 02110-1301 USA, or see the FSF site: http://www.fsf.org. 021 */ 022 package org.jboss.dna.graph.mimetype; 023 024 import java.io.IOException; 025 import java.io.InputStream; 026 import net.jcip.annotations.ThreadSafe; 027 028 /** 029 * MIME-type detection libraries must provide thread-safe implementations of this interface to enable DNA to use the libraries to 030 * return MIME-types for data sources. 031 * 032 * @author jverhaeg 033 */ 034 @ThreadSafe 035 public interface MimeTypeDetector { 036 037 /** 038 * Returns the MIME-type of a data source, using its supplied content and/or its supplied name, depending upon the 039 * implementation. If the MIME-type cannot be determined, either a "default" MIME-type or <code>null</code> may be returned, 040 * where the former will prevent earlier registered MIME-type detectors from being consulted. 041 * 042 * @param name The name of the data source; may be <code>null</code>. 043 * @param content The content of the data source; may be <code>null</code>. 044 * @return The MIME-type of the data source, or optionally <code>null</code> if the MIME-type could not be determined. 045 * @throws IOException If an error occurs reading the supplied content. 046 */ 047 String mimeTypeOf( String name, 048 InputStream content ) throws IOException; 049 }