--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/visual-panels/core/src/java/util/com/oracle/solaris/vp/util/misc/DTDChecker.java	Thu May 24 04:16:47 2012 -0400
@@ -0,0 +1,83 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
+ */
+
+package com.oracle.solaris.vp.util.misc;
+
+import java.io.IOException;
+import org.xml.sax.EntityResolver;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+
+/**
+ * A simple EntityResolver that tracks whether a particular external entity
+ * is referenced by the document.
+ */
+public class DTDChecker implements EntityResolver
+{
+    private boolean match_ = false;
+    private String system_;
+
+    /**
+     * Contructs a {@code DTDChecker} that looks for references to
+     * {@code SystemId}.
+     *
+     * @param system path of the external entity to track
+     */
+    public DTDChecker(String system)
+    {
+	system_ = "file://" + system;
+    }
+
+    /**
+     * Returns whether the specified entity was referenced or not.
+     *
+     * @return {@code true} if the entity was referenced, {@code false} if not.
+     */
+    public boolean isUsed()
+    {
+	return (match_);
+    }
+
+    /**
+     * Resets the {@code DTDChecker} so it can used again.
+     */
+    public void reset()
+    {
+	match_ = false;
+    }
+
+    /*
+     * EntityResolver methods
+     */
+
+    @Override
+    public InputSource resolveEntity(String publicId, String systemId)
+	throws SAXException, IOException
+    {
+	if (publicId == null && systemId.equals(system_))
+	    match_ = true;
+	return (null);
+    }
+}