Bugzilla #42144

Missing File from previous commit
Submitted by Adrian Cumiskey <dev.at.cumiskey.com>

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@581916 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/src/java/org/apache/fop/render/ps/extensions/AbstractPSExtensionElement.java b/src/java/org/apache/fop/render/ps/extensions/AbstractPSExtensionElement.java
new file mode 100644 (file)
index 0000000..f2a9c56
--- /dev/null
+++ b/src/java/org/apache/fop/render/ps/extensions/AbstractPSExtensionElement.java
@@ -0,0 +1,133 @@
+/*\r
+ * Licensed to the Apache Software Foundation (ASF) under one or more\r
+ * contributor license agreements.  See the NOTICE file distributed with\r
+ * this work for additional information regarding copyright ownership.\r
+ * The ASF licenses this file to You under the Apache License, Version 2.0\r
+ * (the "License"); you may not use this file except in compliance with\r
+ * the License.  You may obtain a copy of the License at\r
+ * \r
+ *      http://www.apache.org/licenses/LICENSE-2.0\r
+ * \r
+ * Unless required by applicable law or agreed to in writing, software\r
+ * distributed under the License is distributed on an "AS IS" BASIS,\r
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+ * See the License for the specific language governing permissions and\r
+ * limitations under the License.\r
+ */\r
+\r
+/* $Id: AbstractPSExtensionObject.java 426576 2006-07-28 15:44:37Z jeremias $ */\r
+ \r
+package org.apache.fop.render.ps.extensions;\r
+\r
+// FOP\r
+import org.apache.fop.apps.FOPException;\r
+import org.apache.fop.fo.FONode;\r
+import org.apache.fop.fo.PropertyList;\r
+import org.apache.fop.fo.ValidationException;\r
+import org.apache.fop.fo.extensions.ExtensionAttachment;\r
+\r
+import org.xml.sax.Locator;\r
+\r
+/**\r
+ * Base class for the PostScript-specific extension elements.\r
+ */\r
+public abstract class AbstractPSExtensionElement extends FONode {\r
+\r
+    /**\r
+     * extension attachment\r
+     */\r
+    protected PSExtensionAttachment attachment;\r
+    \r
+    /**\r
+     * Default constructor\r
+     * \r
+     * @param parent parent of this node\r
+     * @see org.apache.fop.fo.FONode#FONode(FONode)\r
+     */\r
+    public AbstractPSExtensionElement(FONode parent) {\r
+        super(parent);\r
+    }\r
+\r
+    /**\r
+     * Blocks XSL FO's from having non-FO parents.\r
+     * \r
+     * @param loc location in the FO source file\r
+     * @param nsURI namespace of incoming node\r
+     * @param localName (e.g. "table" for "fo:table")\r
+     * @throws ValidationException if incoming node not valid for parent\r
+     * @see org.apache.fop.fo.FONode#validateChildNode(Locator, String, String)\r
+     */\r
+    protected void validateChildNode(Locator loc, String nsURI, String localName) \r
+                throws ValidationException {\r
+        if (FO_URI.equals(nsURI)) {\r
+            invalidChildError(loc, nsURI, localName);\r
+        }\r
+    }\r
+\r
+    /**\r
+     * Adds characters (does nothing here)\r
+     * @param data array of characters containing text to be added\r
+     * @param start starting array element to add\r
+     * @param length of data array to add\r
+     * @param pList currently applicable PropertyList \r
+     * @param locator location in fo source file.\r
+     * @see org.apache.fop.fo.FONode#addCharacters(char[], int, int, PropertyList, Locator)\r
+     */\r
+    protected void addCharacters(char[] data, int start, int length,\r
+                                 PropertyList pList, Locator locator) {\r
+        PSExtensionAttachment a = (PSExtensionAttachment)getExtensionAttachment();\r
+        if (a.getContent() != null) {\r
+            StringBuffer sb = new StringBuffer(a.getContent());\r
+            sb.append(data, start, length - start);\r
+            a.setContent(sb.toString());\r
+        } else {\r
+            a.setContent(new String(data, start, length - start));\r
+        }\r
+    }\r
+\r
+    /**\r
+     * @return a String representation of this object\r
+     * @see org.apache.fop.fo.FONode#getNamespaceURI()\r
+     */\r
+    public String getNamespaceURI() {\r
+        return PSExtensionElementMapping.NAMESPACE;\r
+    }\r
+    \r
+    /**\r
+     * @return a String representation of this object\r
+     * @see org.apache.fop.fo.FONode#getNormalNamespacePrefix()\r
+     */\r
+    public String getNormalNamespacePrefix() {\r
+        return "fox";\r
+    }\r
+\r
+    /**\r
+     * @see org.apache.fop.fo.FONode#endOfNode()\r
+     * @throws FOPException if there's a problem during processing\r
+     */\r
+    protected void endOfNode() throws FOPException {\r
+        super.endOfNode();\r
+        String s = ((PSExtensionAttachment)getExtensionAttachment()).getContent();\r
+        if (s == null || s.length() == 0) {\r
+            missingChildElementError("#PCDATA");\r
+        }\r
+    }\r
+    \r
+    /**\r
+     * @return the extension attachment if one is created by the extension element, null otherwise.\r
+     * @see org.apache.fop.fo.FONode#getExtensionAttachment()\r
+     */\r
+    public ExtensionAttachment getExtensionAttachment() {\r
+        if (attachment == null) {\r
+            this.attachment = (PSExtensionAttachment)instantiateExtensionAttachment();\r
+        }\r
+        return this.attachment;\r
+    }\r
+    \r
+    /**\r
+     * Instantiates extension attachment object\r
+     * @return extension attachment\r
+     */\r
+    protected abstract ExtensionAttachment instantiateExtensionAttachment();\r
+}\r
+\r