author | alanb |
Sun, 15 Feb 2009 12:25:54 +0000 | |
changeset 2057 | 3acf8e5e2ca0 |
child 3065 | 452aaa2899fc |
permissions | -rw-r--r-- |
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/* |
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* Copyright 2008-2009 Sun Microsystems, Inc. All Rights Reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Sun designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Sun in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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package sun.nio.fs; |
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|
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import java.nio.file.FileRef; |
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import java.nio.file.spi.FileTypeDetector; |
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import java.io.IOException; |
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import sun.nio.fs.MimeType; |
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|
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/** |
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* Base implementation of FileTypeDetector |
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*/ |
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public abstract class AbstractFileTypeDetector |
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extends FileTypeDetector |
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{ |
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protected AbstractFileTypeDetector() { |
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super(); |
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} |
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/** |
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* Invokes the implProbeContentType method to guess the file's content type, |
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* and this validates that the content type's syntax is valid. |
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*/ |
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@Override |
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public final String probeContentType(FileRef file) throws IOException { |
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if (file == null) |
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throw new NullPointerException("'file' is null"); |
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String result = implProbeContentType(file); |
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if (result != null) { |
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// check the content type |
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try { |
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MimeType.parse(result); |
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} catch (IllegalArgumentException ignore) { |
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result = null; |
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} |
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} |
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return result; |
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} |
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/** |
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* Probes the given file to guess its content type. |
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*/ |
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protected abstract String implProbeContentType(FileRef file) |
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throws IOException; |
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} |