Adding a class for handling unsupported stylesheet elements
PR:
Obtained from:
Submitted by: morten@xml.apache.org
Reviewed by: morten@xml.apache.org
diff --git a/src/org/apache/xalan/xsltc/compiler/UnsupportedElement.java b/src/org/apache/xalan/xsltc/compiler/UnsupportedElement.java
new file mode 100644
index 0000000..b457650
--- /dev/null
+++ b/src/org/apache/xalan/xsltc/compiler/UnsupportedElement.java
@@ -0,0 +1,168 @@
+/*
+ * @(#)$Id$
+ *
+ * The Apache Software License, Version 1.1
+ *
+ *
+ * Copyright (c) 2001 The Apache Software Foundation. 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. The end-user documentation included with the redistribution,
+ * if any, must include the following acknowledgment:
+ * "This product includes software developed by the
+ * Apache Software Foundation (http://www.apache.org/)."
+ * Alternately, this acknowledgment may appear in the software itself,
+ * if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Xalan" and "Apache Software Foundation" must
+ * not be used to endorse or promote products derived from this
+ * software without prior written permission. For written
+ * permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache",
+ * nor may "Apache" appear in their name, without prior written
+ * permission of the Apache Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation and was
+ * originally based on software copyright (c) 2001, Sun
+ * Microsystems., http://www.sun.com. For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ * @author Morten Jorgensen
+ *
+ */
+
+package org.apache.xalan.xsltc.compiler;
+
+import java.util.Hashtable;
+import java.util.Enumeration;
+import java.util.Vector;
+
+import javax.xml.parsers.*;
+
+import org.xml.sax.*;
+
+import org.apache.xalan.xsltc.compiler.util.Type;
+import org.apache.xalan.xsltc.compiler.util.ReferenceType;
+
+import de.fub.bytecode.generic.*;
+import org.apache.xalan.xsltc.compiler.util.*;
+
+final class UnsupportedElement extends SyntaxTreeNode {
+
+ private Fallback _fallback = null;
+ private String _message = null;
+
+ /**
+ * Basic consutrcor - stores element uri/prefix/localname
+ */
+ public UnsupportedElement(String uri, String prefix, String local) {
+ super(uri, prefix, local);
+ }
+
+ /**
+ * There are different categories of unsupported elements (believe it
+ * or not): there are elements within the XSLT namespace (these would
+ * be elements that are not yet implemented), there are extensions of
+ * other XSLT processors and there are unrecognised extension elements
+ * of this XSLT processor. The error message passed to this method
+ * should describe the unsupported element itself and what category
+ * the element belongs in.
+ */
+ public void setErrorMessage(String message) {
+ _message = message;
+ }
+
+ /**
+ * Displays the contents of this element
+ */
+ public void display(int indent) {
+ indent(indent);
+ Util.println("Unsupported element = " + _qname.getNamespace() +
+ ":" + _qname.getLocalPart());
+ displayContents(indent + IndentIncrement);
+ }
+
+
+ /**
+ * Scan all descendants and find the first xsl:fallback element (if any)
+ */
+ private SyntaxTreeNode findFallback(SyntaxTreeNode root) {
+
+ // First check if this element exists at all
+ if (root == null) return null;
+
+ // Then check if the element is an xsl:fallback element
+ if (root instanceof Fallback) return((Fallback)root);
+
+ // Then traverse all child elements
+ Vector children = root.getContents();
+ if (children != null) {
+ final int count = children.size();
+ for (int i = 0; i < count; i++) {
+ SyntaxTreeNode child = (SyntaxTreeNode)children.elementAt(i);
+ SyntaxTreeNode node = findFallback(child);
+ if (node != null) return node;
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Find any fallback in the descendant nodes; then activate & parse it
+ */
+ public void parseContents(Parser parser) {
+ _fallback = (Fallback)findFallback(this);
+ if (_fallback != null) {
+ _fallback.activate();
+ _fallback.parseContents(parser);
+ }
+ }
+
+ /**
+ * Run type check on the fallback element (if any).
+ */
+ public Type typeCheck(SymbolTable stable) throws TypeCheckError {
+ if (_fallback == null) {
+ throw new TypeCheckError(new ErrorMsg(_message));
+ }
+ return(_fallback.typeCheck(stable));
+ }
+
+ /**
+ * Translate the fallback element (if any). The stylesheet should never
+ * be compiled if an unsupported element does not have a fallback element,
+ * so this method should never be called unless _fallback != null
+ */
+ public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
+ if (_fallback != null) _fallback.translate(classGen, methodGen);
+ }
+}
