| /* |
| * @(#)$Id$ |
| * |
| * 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 |
| * @author Erwin Bolwidt <ejb@klomp.org> |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import java.util.Vector; |
| |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.bcel.generic.*; |
| import org.apache.xalan.xsltc.compiler.util.*; |
| |
| class NameBase extends FunctionCall { |
| |
| private Expression _param = null; |
| private Type _paramType = Type.Node; |
| |
| /** |
| * Handles calls with no parameter (current node is implicit parameter). |
| */ |
| public NameBase(QName fname) { |
| super(fname); |
| } |
| |
| /** |
| * Handles calls with one parameter (either node or node-set). |
| */ |
| public NameBase(QName fname, Vector arguments) { |
| super(fname, arguments); |
| _param = argument(0); |
| } |
| |
| |
| /** |
| * Check that we either have no parameters or one parameter that is |
| * either a node or a node-set. |
| */ |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| |
| // Check the argument type (if any) |
| switch(argumentCount()) { |
| case 0: |
| _paramType = Type.Node; |
| break; |
| case 1: |
| _paramType = _param.typeCheck(stable); |
| break; |
| default: |
| throw new TypeCheckError(this); |
| } |
| |
| // The argument has to be a node, a node-set or a node reference |
| if ((_paramType != Type.NodeSet) && |
| (_paramType != Type.Node) && |
| (_paramType != Type.Reference)) { |
| throw new TypeCheckError(this); |
| } |
| |
| return (_type = Type.String); |
| } |
| |
| public Type getType() { |
| return _type; |
| } |
| |
| /** |
| * Translate the code required for getting the node for which the |
| * QName, local-name or namespace URI should be extracted. |
| */ |
| public void translate(ClassGenerator classGen, |
| MethodGenerator methodGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| il.append(methodGen.loadDOM()); |
| |
| // Function was called with no parameters |
| if (argumentCount() == 0) { |
| il.append(methodGen.loadContextNode()); |
| } |
| // Function was called with node parameter |
| else if (_paramType == Type.Node) { |
| _param.translate(classGen, methodGen); |
| } |
| else if (_paramType == Type.Reference) { |
| _param.translate(classGen, methodGen); |
| il.append(new INVOKESTATIC(cpg.addMethodref |
| (BASIS_LIBRARY_CLASS, |
| "referenceToNodeSet", |
| "(Ljava/lang/Object;)" + |
| "Lorg/apache/xalan/xsltc/" + |
| "NodeIterator;"))); |
| il.append(methodGen.nextNode()); |
| } |
| // Function was called with node-set parameter |
| else { |
| _param.translate(classGen, methodGen); |
| _param.startResetIterator(classGen, methodGen); |
| il.append(methodGen.nextNode()); |
| } |
| } |
| } |