Merge branch 'JAL-1286' into develop

[jalview.git] / src / jalview / io / FileParse.java

diff --git a/src/jalview/io/FileParse.java b/src/jalview/io/FileParse.java
index 0515507..bb52ec2 100755 (executable)
--- a/src/jalview/io/FileParse.java
+++ b/src/jalview/io/FileParse.java
@@ -1,13 +1,13 @@
 /*
- * Jalview - A Sequence Alignment Editor and Viewer (Version 2.6)
- * Copyright (C) 2010 J Procter, AM Waterhouse, G Barton, M Clamp, S Searle
+ * Jalview - A Sequence Alignment Editor and Viewer (Version 2.8)
+ * Copyright (C) 2012 J Procter, AM Waterhouse, LM Lui, J Engelhardt, G Barton, M Clamp, S Searle
  * 
  * This file is part of Jalview.
  * 
  * Jalview 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 3 of the License, or (at your option) any later version.
- * 
+ *  
  * Jalview 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 
@@ -19,6 +19,7 @@ package jalview.io;
 
 import java.io.*;
 import java.net.*;
+import java.util.zip.GZIPInputStream;
 
 /**
  * implements a random access wrapper around a particular datasource, for
@@ -38,18 +39,22 @@ public class FileParse
   // same data source
 
   protected char suffixSeparator = '#';
+
   /**
-   * character used to write newlines 
+   * character used to write newlines
    */
   protected String newline = System.getProperty("line.separator");
+
   public void setNewlineString(String nl)
   {
     newline = nl;
   }
+
   public String getNewlineString()
   {
     return newline;
   }
+
   /**
    * '#' separated string tagged on to end of filename or url that was clipped
    * off to resolve to valid filename
@@ -137,18 +142,63 @@ public class FileParse
     }
     if (!error)
     {
+      if (fileStr.toLowerCase().endsWith(".gz"))
+      {
+        try
+        {
+          dataIn = tryAsGzipSource(new FileInputStream(fileStr));
+          dataName = fileStr;
+          return error;
+        } catch (Exception x)
+        {
+          warningMessage = "Failed  to resolve as a GZ stream ("
+                  + x.getMessage() + ")";
+          x.printStackTrace();
+        }
+        ;
+      }
+      
       dataIn = new BufferedReader(new FileReader(fileStr));
       dataName = fileStr;
     }
     return error;
   }
-
+  private BufferedReader tryAsGzipSource(InputStream inputStream) throws Exception
+  {
+    BufferedReader inData = new BufferedReader(new InputStreamReader(new GZIPInputStream(inputStream)));
+    inData.mark(2048);
+    inData.read();
+    inData.reset();
+    return inData;
+  }
   private boolean checkURLSource(String fileStr) throws IOException,
           MalformedURLException
   {
     errormessage = "URL NOT FOUND";
     URL url = new URL(fileStr);
-    dataIn = new BufferedReader(new InputStreamReader(url.openStream()));
+    //
+    // GZIPInputStream code borrowed from Aquaria (soon to be open sourced) via Kenny Sabir
+    Exception e=null;
+    if (fileStr.toLowerCase().endsWith(".gz")) {
+      try {
+          InputStream inputStream = url.openStream();
+          dataIn = tryAsGzipSource(inputStream);
+          dataName = fileStr;
+          return false;
+      } catch (Exception ex) {
+        e=ex;
+      }
+    }
+
+    try {
+      dataIn = new BufferedReader(new InputStreamReader(url.openStream()));
+    } catch (IOException q) {
+      if (e!=null)
+      {
+        throw new IOException("Failed to resolve GZIP stream", e);
+      }
+      throw q;
+    }
     // record URL as name of datasource.
     dataName = fileStr;
     return false;
@@ -385,23 +435,27 @@ public class FileParse
   {
     return dataName;
   }
+
   /**
    * set the (human readable) name or URI for this datasource
+   * 
    * @param dataname
    */
-  protected void setDataName(String dataname) {
+  protected void setDataName(String dataname)
+  {
     dataName = dataname;
   }
-  
 
   /**
    * get the underlying bufferedReader for this data source.
+   * 
    * @return null if no reader available
    * @throws IOException
    */
   public Reader getReader()
   {
-    if (dataIn != null) // Probably don't need to test for readiness && dataIn.ready())
+    if (dataIn != null) // Probably don't need to test for readiness &&
+                        // dataIn.ready())
     {
       return dataIn;
     }