[GNUnet-SVN] r9947 - Extractor-java/org/gnu/libextractor

[gnunet]

Author: grothoff
Date: 2010-01-01 01:29:25 +0100 (Fri, 01 Jan 2010)
New Revision: 9947

Added:
   Extractor-java/org/gnu/libextractor/MetaData.java
Log:
updating code to work with libextractor 0.6

Added: Extractor-java/org/gnu/libextractor/MetaData.java
===================================================================
--- Extractor-java/org/gnu/libextractor/MetaData.java                           
(rev 0)
+++ Extractor-java/org/gnu/libextractor/MetaData.java   2010-01-01 00:29:25 UTC 
(rev 9947)
@@ -0,0 +1,148 @@
+/*
+     This file is part of libextractor.
+     (C) 2002, 2003, 2004, 2007, 2010 Vidyut Samanta and Christian Grothoff
+
+     libextractor is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 2, or (at your
+     option) any later version.
+
+     libextractor is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with libextractor; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+     Boston, MA 02110-1301, USA.
+ */
+package org.gnu.libextractor;
+
+import java.util.ArrayList;
+import java.io.File;
+import java.io.FileInputStream;
+
+/**
+ * An item of meta data extracted by GNU libextractor.
+ *
+ * @see Extractor
+ * @author Christian Grothoff
+ */ 
+public final class MetaData {
+   
+    /**
+     * Format is unknown.
+     */
+    public static final int METAFORMAT_UNKNOWN = 0;
+
+    /**
+     * 0-terminated, UTF-8 encoded string.  "data_len"
+     * is strlen(data)+1.
+     */
+    public static final int METAFORMAT_UTF8 = 1;
+
+    /**
+     * Some kind of binary format, see given Mime type.
+     */
+    public static final int METAFORMAT_BINARY = 2;
+
+    /**
+     * 0-terminated string.  The specific encoding is unknown.
+     * "data_len" is strlen(data)+1.
+     */
+    public static final int METAFORMAT_C_STRING = 3;
+
+
+    /**
+     * Cached list of Strings describing keyword types.
+     */
+    private final static String[] typeCache_;
+
+    static {
+       typeCache_ = new String[Extractor.getMaxTypeInternal()];
+    }
+
+    /**
+     * LE type number for this meta data item.
+     */
+    public final int type;
+
+    /**
+     * LE format given for the meta data.
+     */
+    public final int format;
+
+    /**
+     * The meta data itself.
+     */
+    public final byte[] meta;
+
+    /**
+     * Mime-type of the meta data.
+     */
+    public final String meta_mime;
+
+
+    /**
+     * Constructor is only called from "native" code.
+     *
+     * @param t type of the meta data
+     * @param f format of the meta data
+     * @param m the actual meta data
+     * @param mm mime type of the meta data
+     */
+    private MetaData (int t,
+                     int f,
+                     byte[] m,
+                     String mm) {
+       this.type = t;
+       this.format = f;
+       this.meta = m;
+       this.meta_mime = mm;
+    }
+
+
+    public String toString() {
+       return getTypeAsString() + " - " + getMetaDataAsString ();
+    }
+
+
+    /**
+     * Return the meta data as a "String" (if the format
+     * type permits this).
+     *
+     * @return null if the format of the meta data is unknown
+     */
+    public String getMetaDataAsString () {
+       switch (format) {
+       case METAFORMAT_C_STRING:
+           return new String (meta);
+       case METAFORMAT_UTF8:
+           try {
+               return new String (meta, "UTF-8");
+           } catch (java.io.UnsupportedEncodingException uee) {
+               // Java should ALWAYS support UTF-8
+               throw new Error (uee);
+           }   
+       case METAFORMAT_BINARY:
+           return "(binary, " + meta.length + " bytes)";
+       default:
+           return null;
+       }
+            
+    }
+
+
+    /**
+     * @return description of this meta data item as a string
+     */
+    public String getTypeAsString() {
+       if (typeCache_[type] == null)
+           typeCache_[type]
+               = Extractor.getTypeAsStringInternal(type);
+       return typeCache_[type];
+    }
+
+
+} // end of MetaData
\ No newline at end of file