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diff --git a/src/main/java/org/pdfbox/util/PDFOperator.java b/src/main/java/org/pdfbox/util/PDFOperator.java
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+++ b/src/main/java/org/pdfbox/util/PDFOperator.java
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+/**
+ * Copyright (c) 2003-2004, 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.util;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * This class represents an Operator in the content stream.
+ *
+ * @author Ben Litchfield (ben@csh.rit.edu)
+ * @version $Revision: 1.13 $
+ */
+public class PDFOperator
+{
+    private String theOperator;
+    private byte[] imageData;
+    private ImageParameters imageParameters;
+
+    private static Map operators = Collections.synchronizedMap( new HashMap() );
+
+    /**
+     * Constructor.
+     *
+     * @param aOperator The operator that this object will represent.
+     */
+    private PDFOperator( String aOperator )
+    {
+        theOperator = aOperator;
+        if( aOperator.startsWith( "/" ) )
+        {
+            throw new RuntimeException( "Operators are not allowed to start with / '" + aOperator + "'" );
+        }
+    }
+
+    /**
+     * This is used to create/cache operators in the system.
+     *
+     * @param operator The operator for the system.
+     *
+     * @return The operator that matches the operator keyword.
+     */
+    public static PDFOperator getOperator( String operator )
+    {
+        PDFOperator operation = null;
+        if( operator.equals( "ID" ) || operator.equals( "BI" ) )
+        {
+            //we can't cache the ID operators.
+            operation = new PDFOperator( operator );
+        }
+        else
+        {
+            operation = (PDFOperator)operators.get( operator );
+            if( operation == null )
+            {
+                operation = new PDFOperator( operator );
+                operators.put( operator, operation );
+            }
+        }
+
+        return operation;
+    }
+
+    /**
+     * This will get the operation that this operator represents.
+     *
+     * @return The string representation of the operation.
+     */
+    public String getOperation()
+    {
+        return theOperator;
+    }
+
+    /**
+     * This will print a string rep of this class.
+     *
+     * @return A string rep of this class.
+     */
+    public String toString()
+    {
+        return "PDFOperator{" + theOperator + "}";
+    }
+
+    /**
+     * This is the special case for the ID operator where there are just random
+     * bytes inlined the stream.
+     *
+     * @return Value of property imageData.
+     */
+    public byte[] getImageData()
+    {
+        return this.imageData;
+    }
+
+    /**
+     * This will set the image data, this is only used for the ID operator.
+     *
+     * @param imageDataArray New value of property imageData.
+     */
+    public void setImageData(byte[] imageDataArray)
+    {
+        imageData = imageDataArray;
+    }
+
+    /**
+     * This will get the image parameters, this is only valid for BI operators.
+     *
+     * @return The image parameters.
+     */
+    public ImageParameters getImageParameters()
+    {
+        return imageParameters;
+    }
+
+    /**
+     * This will set the image parameters, this is only valid for BI operators.
+     *
+     * @param params The image parameters.
+     */
+    public void setImageParameters( ImageParameters params)
+    {
+        imageParameters = params;
+    }
+}
+\ No newline at end of file