From 6025b6016517c6d898d8957d1d7e03ba71431912 Mon Sep 17 00:00:00 2001
From: tknall <tknall@7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c>
Date: Fri, 1 Dec 2006 12:20:24 +0000
Subject: Initial import of release 2.2.

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@4 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c
---
 .../pdfbox/io/RandomAccessFileOutputStream.java    | 145 +++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 src/main/java/org/pdfbox/io/RandomAccessFileOutputStream.java

(limited to 'src/main/java/org/pdfbox/io/RandomAccessFileOutputStream.java')

diff --git a/src/main/java/org/pdfbox/io/RandomAccessFileOutputStream.java b/src/main/java/org/pdfbox/io/RandomAccessFileOutputStream.java
new file mode 100644
index 0000000..b2e7511
--- /dev/null
+++ b/src/main/java/org/pdfbox/io/RandomAccessFileOutputStream.java
@@ -0,0 +1,145 @@
+/**
+ * Copyright (c) 2003, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of pdfbox; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.io;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.RandomAccessFile;
+
+import org.pdfbox.cos.COSBase;
+import org.pdfbox.cos.COSObject;
+import org.pdfbox.cos.COSNumber;
+
+/**
+ * This will write to a RandomAccessFile in the filesystem and keep track
+ * of the position it is writing to and the length of the stream.
+ *
+ * @author Ben Litchfield (ben@csh.rit.edu)
+ * @version $Revision: 1.3 $
+ */
+public class RandomAccessFileOutputStream extends OutputStream
+{
+    private RandomAccessFile file;
+    private long position;
+    private long lengthWritten = 0;
+    private COSBase expectedLength = null;
+
+    /**
+     * Constructor to create an output stream that will write to the end of a
+     * random access file.
+     *
+     * @param raf The file to write to.
+     *
+     * @throws IOException If there is a problem accessing the raf.
+     */
+    public RandomAccessFileOutputStream( RandomAccessFile raf ) throws IOException
+    {
+        file = raf;
+        //first get the position that we will be writing to
+        position = raf.length();
+    }
+
+    /**
+     * This will get the position in the RAF that the stream was written
+     * to.
+     *
+     * @return The position in the raf where the file can be obtained.
+     */
+    public long getPosition()
+    {
+        return position;
+    }
+
+    /**
+     * The number of bytes written to the stream.
+     *
+     * @return The number of bytes read to the stream.
+     */
+    public long getLength()
+    {
+        long length = -1;
+        if( expectedLength instanceof COSNumber )
+        {
+            length = ((COSNumber)expectedLength).intValue();
+        }
+        else if( expectedLength instanceof COSObject &&
+                 ((COSObject)expectedLength).getObject() instanceof COSNumber )
+        {
+            length = ((COSNumber)((COSObject)expectedLength).getObject()).intValue();
+        }
+        if( length == -1 )
+        {
+            length = lengthWritten;
+        }
+        return length;
+    }
+
+    /**
+     * @see OutputStream#write( byte[], int, int )
+     */
+    public void write( byte[] b, int offset, int length ) throws IOException
+    {
+        file.seek( position+lengthWritten );
+        lengthWritten += length;
+        file.write( b, offset, length );
+
+    }
+    /**
+     * @see OutputStream#write( int )
+     */
+    public void write( int b ) throws IOException
+    {
+        file.seek( position+lengthWritten );
+        lengthWritten++;
+        file.write( b );
+    }
+
+    /**
+     * This will get the length that the PDF document specified this stream
+     * should be.  This may not match the number of bytes read.
+     *
+     * @return The expected length.
+     */
+    public COSBase getExpectedLength()
+    {
+        return expectedLength;
+    }
+
+    /**
+     * This will set the expected length of this stream.
+     *
+     * @param value The expected value.
+     */
+    public void setExpectedLength(COSBase value)
+    {
+        expectedLength = value;
+    }
+}
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