- /*
- * Copyright 2001-2004 The Apache Software Foundation.
- *
- * Licensed 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: UnsupportedElement.java,v 1.8 2004/02/16 22:25:10 minchau Exp $
- */
-
- package com.sun.org.apache.xalan.internal.xsltc.compiler;
-
- import java.util.Vector;
-
- import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
- import com.sun.org.apache.bcel.internal.generic.INVOKESTATIC;
- import com.sun.org.apache.bcel.internal.generic.InstructionList;
- import com.sun.org.apache.bcel.internal.generic.PUSH;
-
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
-
- /**
- * @author Morten Jorgensen
- */
- final class UnsupportedElement extends SyntaxTreeNode {
-
- private Vector _fallbacks = null;
- private ErrorMsg _message = null;
- private boolean _isExtension = false;
-
- /**
- * Basic consutrcor - stores element uri/prefix/localname
- */
- public UnsupportedElement(String uri, String prefix, String local, boolean isExtension) {
- super(uri, prefix, local);
- _isExtension = isExtension;
- }
-
- /**
- * 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(ErrorMsg 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 and process all fallback children of the unsupported element.
- */
- private void processFallbacks(Parser parser) {
-
- Vector children = getContents();
- if (children != null) {
- final int count = children.size();
- for (int i = 0; i < count; i++) {
- SyntaxTreeNode child = (SyntaxTreeNode)children.elementAt(i);
- if (child instanceof Fallback) {
- Fallback fallback = (Fallback)child;
- fallback.activate();
- fallback.parseContents(parser);
- if (_fallbacks == null) {
- _fallbacks = new Vector();
- }
- _fallbacks.addElement(child);
- }
- }
- }
- }
-
- /**
- * Find any fallback in the descendant nodes; then activate & parse it
- */
- public void parseContents(Parser parser) {
- processFallbacks(parser);
- }
-
- /**
- * Run type check on the fallback element (if any).
- */
- public Type typeCheck(SymbolTable stable) throws TypeCheckError {
- if (_fallbacks != null) {
- int count = _fallbacks.size();
- for (int i = 0; i < count; i++) {
- Fallback fallback = (Fallback)_fallbacks.elementAt(i);
- fallback.typeCheck(stable);
- }
- }
- return Type.Void;
- }
-
- /**
- * Translate the fallback element (if any).
- */
- public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
- if (_fallbacks != null) {
- int count = _fallbacks.size();
- for (int i = 0; i < count; i++) {
- Fallback fallback = (Fallback)_fallbacks.elementAt(i);
- fallback.translate(classGen, methodGen);
- }
- }
- // We only go into the else block in forward-compatibility mode, when
- // the unsupported element has no fallback.
- else {
- // If the unsupported element does not have any fallback child, then
- // at runtime, a runtime error should be raised when the unsupported
- // element is instantiated. Otherwise, no error is thrown.
- ConstantPoolGen cpg = classGen.getConstantPool();
- InstructionList il = methodGen.getInstructionList();
-
- final int unsupportedElem = cpg.addMethodref(BASIS_LIBRARY_CLASS, "unsupported_ElementF",
- "(" + STRING_SIG + "Z)V");
- il.append(new PUSH(cpg, getQName().toString()));
- il.append(new PUSH(cpg, _isExtension));
- il.append(new INVOKESTATIC(unsupportedElem));
- }
- }
- }