From 106a5e01f038d4cae5e6cf9fe24202e1894b5508 Mon Sep 17 00:00:00 2001
From: Jeremias Maerki <jeremias@apache.org>
Date: Fri, 29 Nov 2002 08:35:43 +0000
Subject: [PATCH] Added some I/O utilities. This class is to be replaced with
 Jakarta Commons IO as soon as a release is available.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/fop-0_20_2-maintain@195647 13f79535-47bb-0310-9956-ffa450edef68
---
 src/org/apache/fop/tools/IOUtil.java | 59 ++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 src/org/apache/fop/tools/IOUtil.java

diff --git a/src/org/apache/fop/tools/IOUtil.java b/src/org/apache/fop/tools/IOUtil.java
new file mode 100644
index 000000000..46125da01
--- /dev/null
+++ b/src/org/apache/fop/tools/IOUtil.java
@@ -0,0 +1,59 @@
+/*
+ * $Id$
+ * Copyright (C) 2002 The Apache Software Foundation. All rights reserved.
+ * For details on use and redistribution please refer to the
+ * LICENSE file included with these sources.
+ */
+
+package org.apache.fop.tools;
+
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+/**
+ * I/O utilities. This class should be replaced as soon as Jakarta Commons IO
+ * announces its first release.
+ * @todo Replace with Jakarta Commons I/O
+ */
+public class IOUtil {
+
+    /**
+     * Copies the contents of the InputStream over to the OutputStream. This 
+     * method doesn't close the streams.
+     * @param in InputStream to read from
+     * @param out OutputStream to write to
+     * @throws IOException In case of an I/O problem
+     */
+    public static void copyStream(InputStream in, OutputStream out) throws IOException {
+        final int bufferSize = 2048;
+        final byte[] buf = new byte[bufferSize];
+        int bytesRead;
+        while ((bytesRead = in.read(buf)) != -1) {
+            out.write(buf, 0, bytesRead);
+        }
+    }
+
+
+    /**
+     * Loads the contents of the InputStream to a byte array. The InputStream 
+     * isn't closed.
+     * @param in InputStream to read from
+     * @param initialTargetBufferSize initial number of bytes to allocate 
+     *      (expected size to avoid a lot of reallocations)
+     * @return byte[] the array of bytes requested
+     * @throws IOException In case of an I/O problem
+     */
+    public static byte[] toByteArray(InputStream in, int initialTargetBufferSize) 
+                throws IOException {
+        ByteArrayOutputStream baout = new ByteArrayOutputStream(initialTargetBufferSize);
+        try {
+            copyStream(in, baout);
+        } finally {
+            baout.close();
+        }
+        return baout.toByteArray();
+    }
+
+}
-- 
2.39.5