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diff --git a/src/java/org/apache/fop/pdf/PDFReference.java b/src/java/org/apache/fop/pdf/PDFReference.java
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+++ b/src/java/org/apache/fop/pdf/PDFReference.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* $Id$ */
+ 
+package org.apache.fop.pdf;
+
+import java.lang.ref.Reference;
+import java.lang.ref.SoftReference;
+
+/**
+ * Class representing a PDF object reference. The object holds a soft reference to the actual
+ * PDF object so the garbage collector can free the object if it's not referenced elsewhere. The
+ * important thing about the class is the reference information to the actual PDF object in the
+ * PDF file.
+ */
+public class PDFReference implements PDFWritable {
+    
+    private String indirectReference;
+    
+    private Reference objReference;
+    
+    /**
+     * Creates a new PDF reference.
+     * @param obj the object to be referenced
+     */
+    public PDFReference(PDFObject obj) {
+        this.indirectReference = obj.referencePDF();
+        this.objReference = new SoftReference(obj);
+    }
+
+    /**
+     * Returns the PDF object
+     * @return the PDF object, or null if it has been released
+     */
+    public PDFObject getObject() {
+        if (this.objReference != null) {
+            PDFObject obj = (PDFObject)this.objReference.get();
+            if (obj == null) {
+                this.objReference = null;
+            }
+            return obj;
+        } else {
+            return null;
+        }
+    }
+    
+    /** @see org.apache.fop.pdf.PDFWritable#toInlinePDFString() */
+    public String toInlinePDFString() {
+        return this.indirectReference;
+    }
+    
+}