From 9ae5d99ebe852fbb42a386b4c4969bb974e4d107 Mon Sep 17 00:00:00 2001
From: Stefan Bodewig <bodewig@apache.org>
Date: Tue, 25 Aug 2009 08:50:37 +0000
Subject: [PATCH] Use NIO when copying files without filtering.  PR 30094. 
 Submitted by J Bleijenbergh and Robin Verduijn

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@807523 13f79535-47bb-0310-9956-ffa450edef68
---
 CONTRIBUTORS                                  |  2 +
 WHATSNEW                                      |  4 ++
 contributors.xml                              |  8 +++
 .../apache/tools/ant/util/ResourceUtils.java  | 56 ++++++++++++++++---
 4 files changed, 63 insertions(+), 7 deletions(-)

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index b06e78f22..09573efd7 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -123,6 +123,7 @@ Ingenonsya France
 Ingmar Stein
 Irene Rusman
 Ivan Ivanov
+J Bleijenbergh
 Jack J. Woehr
 James Duncan Davidson
 Jan Cumps
@@ -261,6 +262,7 @@ Robert Streich
 Robert Watkins
 Roberto Scaramuzzi
 Robin Green
+Robin Verduijn
 Rob Oxspring
 Rob van Oostrum
 Rodrigo Schmidt
diff --git a/WHATSNEW b/WHATSNEW
index 799a63721..535152da4 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -905,6 +905,10 @@ Other changes:
    a property to the number of rows affected by a task execution.
    Bugzilla Report 40923.
 
+ * when Ant copies files without filtering, it will now use NIO
+   channels.
+   Bugzilla Report 30094.
+
 Changes from Ant 1.7.0 TO Ant 1.7.1
 =============================================
 
diff --git a/contributors.xml b/contributors.xml
index dc8fde697..30e33ab67 100644
--- a/contributors.xml
+++ b/contributors.xml
@@ -518,6 +518,10 @@
     <first>Ivan</first>
     <last>Ivanov</last>
   </name>
+  <name>
+    <first>J</first>
+    <last>Bleijenbergh</last>
+  </name>
   <name>
     <first>Jack</first>
     <middle>J.</middle>
@@ -1066,6 +1070,10 @@
     <first>Robin</first>
     <last>Green</last>
   </name>
+  <name>
+    <first>Robin</first>
+    <last>Verduijn</last>
+  </name>
   <name>
     <first>Rob</first>
     <last>Oxspring</last>
diff --git a/src/main/org/apache/tools/ant/util/ResourceUtils.java b/src/main/org/apache/tools/ant/util/ResourceUtils.java
index 7f821a2f6..c2e03168e 100644
--- a/src/main/org/apache/tools/ant/util/ResourceUtils.java
+++ b/src/main/org/apache/tools/ant/util/ResourceUtils.java
@@ -17,19 +17,22 @@
  */
 package org.apache.tools.ant.util;
 
-import java.io.File;
-import java.io.Reader;
-import java.io.InputStream;
-import java.io.IOException;
-import java.io.OutputStream;
+import java.io.BufferedInputStream;
 import java.io.BufferedReader;
 import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.io.OutputStream;
 import java.io.OutputStreamWriter;
-import java.io.BufferedInputStream;
+import java.io.Reader;
+import java.nio.channels.FileChannel;
 import java.util.Arrays;
-import java.util.Vector;
 import java.util.Iterator;
+import java.util.Vector;
 
 import org.apache.tools.ant.Project;
 import org.apache.tools.ant.ProjectComponent;
@@ -433,6 +436,45 @@ public class ResourceUtils {
                 FileUtils.close(out);
                 FileUtils.close(in);
             }
+        } else if (source.as(FileProvider.class) != null
+                   && dest.as(FileProvider.class) != null) {
+            File sourceFile =
+                ((FileProvider) source.as(FileProvider.class)).getFile();
+            File destFile =
+                ((FileProvider) dest.as(FileProvider.class)).getFile();
+
+            File parent = destFile.getParentFile();
+            if (parent != null && !parent.isDirectory()
+                && !destFile.getParentFile().mkdirs()) {
+                throw new IOException("failed to create the parent directory"
+                                      + " for " + destFile);
+            }
+
+            FileInputStream in = null;
+            FileOutputStream out = null;
+            FileChannel srcChannel = null;
+            FileChannel destChannel = null;
+
+            try {
+                in = new FileInputStream(sourceFile);
+                out = new FileOutputStream(destFile);
+                    
+                srcChannel = in.getChannel();
+                destChannel = out.getChannel();
+                
+                long position = 0;
+                long count = srcChannel.size();
+                while (position < count) {
+                    position +=
+                        srcChannel.transferTo(position, FileUtils.BUF_SIZE,
+                                              destChannel);
+                }
+            } finally {
+                FileUtils.close(srcChannel);
+                FileUtils.close(destChannel);
+                FileUtils.close(out);
+                FileUtils.close(in);
+            }
         } else {
             InputStream in = null;
             OutputStream out = null;