| /* |
| * @(#)$Id$ |
| * |
| * 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.INVOKESPECIAL; |
| import org.apache.bcel.generic.INVOKEVIRTUAL; |
| import org.apache.bcel.generic.InstructionList; |
| import org.apache.bcel.generic.NEW; |
| import org.apache.bcel.generic.PUSH; |
| import org.apache.xalan.xsltc.compiler.util.ClassGenerator; |
| import org.apache.xalan.xsltc.compiler.util.MethodGenerator; |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.xalan.xsltc.compiler.util.TypeCheckError; |
| |
| final class Message extends Instruction { |
| private boolean _terminate = false; |
| |
| public void parseContents(Parser parser) { |
| String termstr = getAttribute("terminate"); |
| if (termstr != null) { |
| _terminate = termstr.equals("yes"); |
| } |
| parseChildren(parser); |
| } |
| |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| typeCheckContents(stable); |
| return Type.Void; |
| } |
| |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| // Load the translet (for call to displayMessage() function) |
| il.append(classGen.loadTranslet()); |
| |
| switch (elementCount()) { |
| case 0: |
| il.append(new PUSH(cpg, "")); |
| break; |
| case 1: |
| SyntaxTreeNode child = (SyntaxTreeNode) elementAt(0); |
| if (child instanceof Text) { |
| il.append(new PUSH(cpg, ((Text) child).getText())); |
| break; |
| } |
| // falls through |
| default: |
| // Push current output handler onto the stack |
| il.append(methodGen.loadHandler()); |
| |
| // Replace the current output handler by a ToXMLStream |
| il.append(new NEW(cpg.addClass(STREAM_XML_OUTPUT))); |
| il.append(methodGen.storeHandler()); |
| |
| // Push a reference to a StringWriter |
| il.append(new NEW(cpg.addClass(STRING_WRITER))); |
| il.append(DUP); |
| il.append(DUP); |
| il.append(new INVOKESPECIAL( |
| cpg.addMethodref(STRING_WRITER, "<init>", "()V"))); |
| |
| // Load ToXMLStream |
| il.append(methodGen.loadHandler()); |
| il.append(new INVOKESPECIAL( |
| cpg.addMethodref(STREAM_XML_OUTPUT, "<init>", |
| "()V"))); |
| |
| // Invoke output.setWriter(STRING_WRITER) |
| il.append(methodGen.loadHandler()); |
| il.append(SWAP); |
| il.append(new INVOKEVIRTUAL( |
| cpg.addMethodref(OUTPUT_BASE, "setWriter", |
| "("+WRITER_SIG+")V"))); |
| |
| // Invoke output.setEncoding("UTF-8") |
| il.append(methodGen.loadHandler()); |
| il.append(new PUSH(cpg, "UTF-8")); // other encodings? |
| il.append(new INVOKEVIRTUAL( |
| cpg.addMethodref(OUTPUT_BASE, "setEncoding", |
| "("+STRING_SIG+")V"))); |
| |
| // Invoke output.setOmitXMLDeclaration(true) |
| il.append(methodGen.loadHandler()); |
| il.append(ICONST_1); |
| il.append(new INVOKEVIRTUAL( |
| cpg.addMethodref(OUTPUT_BASE, "setOmitXMLDeclaration", |
| "(Z)V"))); |
| |
| il.append(methodGen.loadHandler()); |
| il.append(new INVOKEVIRTUAL( |
| cpg.addMethodref(OUTPUT_BASE, "startDocument", |
| "()V"))); |
| |
| // Inline translation of contents |
| translateContents(classGen, methodGen); |
| |
| il.append(methodGen.loadHandler()); |
| il.append(new INVOKEVIRTUAL( |
| cpg.addMethodref(OUTPUT_BASE, "endDocument", |
| "()V"))); |
| |
| // Call toString() on StringWriter |
| il.append(new INVOKEVIRTUAL( |
| cpg.addMethodref(STRING_WRITER, "toString", |
| "()" + STRING_SIG))); |
| |
| // Restore old output handler |
| il.append(SWAP); |
| il.append(methodGen.storeHandler()); |
| break; |
| } |
| |
| // Send the resulting string to the message handling method |
| il.append(new INVOKEVIRTUAL(cpg.addMethodref(TRANSLET_CLASS, |
| "displayMessage", |
| "("+STRING_SIG+")V"))); |
| |
| // If 'terminate' attribute is set to 'yes': Instanciate a |
| // RunTimeException, but it on the stack and throw an exception |
| if (_terminate == true) { |
| // Create a new instance of RunTimeException |
| final int einit = cpg.addMethodref("java.lang.RuntimeException", |
| "<init>", |
| "(Ljava/lang/String;)V"); |
| il.append(new NEW(cpg.addClass("java.lang.RuntimeException"))); |
| il.append(DUP); |
| il.append(new PUSH(cpg,"Termination forced by an " + |
| "xsl:message instruction")); |
| il.append(new INVOKESPECIAL(einit)); |
| il.append(ATHROW); |
| } |
| } |
| |
| } |
