| /* |
| * @(#)$Id$ |
| * |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2001-2003 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 Santiago Pericas-Geertsen |
| * @author Morten Jorgensen |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import org.apache.bcel.generic.ConstantPoolGen; |
| import org.apache.bcel.generic.INVOKEINTERFACE; |
| import org.apache.bcel.generic.INVOKEVIRTUAL; |
| import org.apache.bcel.generic.InstructionList; |
| import org.apache.bcel.generic.PUSH; |
| import org.apache.xalan.xsltc.compiler.util.ClassGenerator; |
| import org.apache.xalan.xsltc.compiler.util.ErrorMsg; |
| import org.apache.xalan.xsltc.compiler.util.MethodGenerator; |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.xalan.xsltc.compiler.util.TypeCheckError; |
| import org.apache.xalan.xsltc.compiler.util.Util; |
| |
| final class ValueOf extends Instruction { |
| private Expression _select; |
| private boolean _escaping = true; |
| private boolean _isString = false; |
| |
| public void display(int indent) { |
| indent(indent); |
| Util.println("ValueOf"); |
| indent(indent + IndentIncrement); |
| Util.println("select " + _select.toString()); |
| } |
| |
| public void parseContents(Parser parser) { |
| _select = parser.parseExpression(this, "select", null); |
| |
| // make sure required attribute(s) have been set |
| if (_select.isDummy()) { |
| reportError(this, parser, ErrorMsg.REQUIRED_ATTR_ERR, "select"); |
| return; |
| } |
| final String str = getAttribute("disable-output-escaping"); |
| if ((str != null) && (str.equals("yes"))) _escaping = false; |
| } |
| |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| Type type = _select.typeCheck(stable); |
| |
| // Prefer to handle the value as a node; fall back to String, otherwise |
| if (type != null && !type.identicalTo(Type.Node)) { |
| /*** |
| *** %HZ% Would like to treat result-tree fragments in the same |
| *** %HZ% way as node sets for value-of, but that's running into |
| *** %HZ% some snags. Instead, they'll be converted to String |
| if (type.identicalTo(Type.ResultTree)) { |
| _select = new CastExpr(new CastExpr(_select, Type.NodeSet), |
| Type.Node); |
| } else |
| ***/ |
| if (type.identicalTo(Type.NodeSet)) { |
| _select = new CastExpr(_select, Type.Node); |
| } else { |
| _isString = true; |
| if (!type.identicalTo(Type.String)) { |
| _select = new CastExpr(_select, Type.String); |
| } |
| _isString = true; |
| } |
| } |
| return Type.Void; |
| } |
| |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| final int setEscaping = cpg.addInterfaceMethodref(OUTPUT_HANDLER, |
| "setEscaping","(Z)Z"); |
| |
| // Turn off character escaping if so is wanted. |
| if (!_escaping) { |
| il.append(methodGen.loadHandler()); |
| il.append(new PUSH(cpg,false)); |
| il.append(new INVOKEINTERFACE(setEscaping,2)); |
| } |
| |
| // Translate the contents. If the value is a string, use the |
| // translet.characters(String, TranslatOutputHandler) method. |
| // Otherwise, the value is a node, and the |
| // dom.characters(int node, TransletOutputHandler) method can dispatch |
| // the string value of the node to the output handler more efficiently. |
| if (_isString) { |
| final int characters = cpg.addMethodref(TRANSLET_CLASS, |
| CHARACTERSW, |
| CHARACTERSW_SIG); |
| |
| il.append(classGen.loadTranslet()); |
| _select.translate(classGen, methodGen); |
| il.append(methodGen.loadHandler()); |
| il.append(new INVOKEVIRTUAL(characters)); |
| } else { |
| final int characters = cpg.addInterfaceMethodref(DOM_INTF, |
| CHARACTERS, |
| CHARACTERS_SIG); |
| |
| il.append(methodGen.loadDOM()); |
| _select.translate(classGen, methodGen); |
| il.append(methodGen.loadHandler()); |
| il.append(new INVOKEINTERFACE(characters, 3)); |
| } |
| |
| // Restore character escaping setting to whatever it was. |
| if (!_escaping) { |
| il.append(methodGen.loadHandler()); |
| il.append(SWAP); |
| il.append(new INVOKEINTERFACE(setEscaping,2)); |
| il.append(POP); |
| } |
| } |
| } |
