| /* |
| * @(#)$Id$ |
| * |
| * 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 Jacek Ambroziak |
| * @author Morten Jorgensen |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import java.util.Vector; |
| import java.util.Enumeration; |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.xalan.xsltc.compiler.util.TypeCheckError; |
| import org.apache.xalan.xsltc.compiler.util.ErrorMsg; |
| import org.apache.bcel.generic.Instruction; |
| import org.apache.bcel.generic.*; |
| import org.apache.xalan.xsltc.compiler.util.*; |
| |
| final class DocumentCall extends FunctionCall { |
| |
| private Expression _uri = null; |
| private Expression _base = null; |
| private Type _uriType; |
| |
| /** |
| * Default function call constructor |
| */ |
| public DocumentCall(QName fname, Vector arguments) { |
| super(fname, arguments); |
| } |
| |
| /** |
| * Type checks the arguments passed to the document() function. The first |
| * argument can be any type (we must cast it to a string) and contains the |
| * URI of the document |
| */ |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| // At least one argument - two at most |
| final int ac = argumentCount(); |
| if ((ac < 1) || (ac > 2)) { |
| ErrorMsg msg = new ErrorMsg(ErrorMsg.ILLEGAL_ARG_ERR, this); |
| throw new TypeCheckError(msg); |
| } |
| |
| // Parse the first argument - the document URI |
| _uri = argument(0); |
| if (_uri instanceof LiteralExpr) { |
| LiteralExpr expr = (LiteralExpr)_uri; |
| if (expr.getValue().equals(EMPTYSTRING)) { |
| Stylesheet stylesheet = getStylesheet(); |
| if (stylesheet == null) { |
| ErrorMsg msg = new ErrorMsg(ErrorMsg.ILLEGAL_ARG_ERR, this); |
| throw new TypeCheckError(msg); |
| } |
| _uri = new LiteralExpr(stylesheet.getSystemId(), EMPTYSTRING); |
| } |
| } |
| |
| _uriType = _uri.typeCheck(stable); |
| if ((_uriType != Type.NodeSet) && (_uriType != Type.String)) { |
| _uri = new CastExpr(_uri, Type.String); |
| } |
| |
| // Parse the second argument - the document URI base |
| if (ac == 2) { |
| _base = argument(1); |
| if (!_base.typeCheck(stable).identicalTo(Type.NodeSet)) { |
| ErrorMsg msg = new ErrorMsg(ErrorMsg.DOCUMENT_ARG_ERR, this); |
| throw new TypeCheckError(msg); |
| } |
| } |
| |
| return _type = Type.NodeSet; |
| } |
| |
| /** |
| * Translates the document() function call to a call to LoadDocument()'s |
| * static method document(). |
| */ |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| final int domField = cpg.addFieldref(classGen.getClassName(), |
| DOM_FIELD, |
| DOM_INTF_SIG); |
| final String docParamList = |
| "("+OBJECT_SIG+STRING_SIG+STRING_SIG+TRANSLET_SIG+DOM_INTF_SIG+")"+ |
| NODE_ITERATOR_SIG; |
| final int docIdx = cpg.addMethodref(LOAD_DOCUMENT_CLASS, |
| "document", docParamList); |
| |
| final int uriIdx = cpg.addInterfaceMethodref(DOM_INTF, |
| "getDocumentURI", |
| "(I)"+STRING_SIG); |
| |
| final int nextIdx = cpg.addInterfaceMethodref(NODE_ITERATOR, |
| NEXT, NEXT_SIG); |
| |
| // The URI can be either a node-set or something else cast to a string |
| _uri.translate(classGen, methodGen); |
| if (_uriType == Type.NodeSet) |
| _uri.startResetIterator(classGen, methodGen); |
| |
| // The base of the URI may be given as a second argument (a node-set) |
| il.append(methodGen.loadDOM()); |
| if (_base != null) { |
| _base.translate(classGen, methodGen); |
| il.append(new INVOKEINTERFACE(nextIdx, 1)); |
| } |
| else { |
| il.append(methodGen.loadContextNode()); |
| } |
| il.append(new INVOKEINTERFACE(uriIdx, 2)); |
| il.append(new PUSH(cpg, getStylesheet().getSystemId())); |
| |
| // Feck the rest of the parameters on the stack |
| il.append(classGen.loadTranslet()); |
| il.append(DUP); |
| il.append(new GETFIELD(domField)); |
| il.append(new INVOKESTATIC(docIdx)); |
| } |
| |
| } |