| /* |
| * @(#)$Id$ |
| * |
| * 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 |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.bcel.generic.*; |
| import org.apache.xalan.xsltc.compiler.util.*; |
| |
| final class TransletOutput extends Instruction { |
| |
| private Expression _filename; |
| |
| private final static String MISSING_FILE_ATTR = |
| "The <xsltc:output> element requires a 'file' attribute."; |
| |
| /** |
| * Displays the contents of this <xsltc:output> element. |
| */ |
| public void display(int indent) { |
| indent(indent); |
| Util.println("TransletOutput: " + _filename); |
| } |
| |
| /** |
| * Parse the contents of this <xsltc:output> element. The only attribute |
| * we recognise is the 'file' attribute that contains teh output filename. |
| */ |
| public void parseContents(Parser parser) { |
| // Get the output filename from the 'file' attribute |
| String filename = getAttribute("file"); |
| |
| // Verify that the filename is in fact set |
| if ((filename == null) || (filename.equals(EMPTYSTRING))) { |
| reportError(this, parser, ErrorMsg.REQUIRED_ATTR_ERR, "file"); |
| } |
| |
| // Save filename as an attribute value template |
| _filename = AttributeValue.create(this, filename, parser); |
| parseChildren(parser); |
| } |
| |
| /** |
| * Type checks the 'file' attribute (must be able to convert it to a str). |
| */ |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| final Type type = _filename.typeCheck(stable); |
| if (type instanceof StringType == false) { |
| _filename = new CastExpr(_filename, Type.String); |
| } |
| typeCheckContents(stable); |
| return Type.Void; |
| } |
| |
| /** |
| * Compile code that opens the give file for output, dumps the contents of |
| * the element to the file, then closes the file. |
| */ |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| // Save the current output handler on the stack |
| il.append(methodGen.loadHandler()); |
| |
| final int open = cpg.addMethodref(TRANSLET_CLASS, |
| "openOutputHandler", |
| "("+STRING_SIG+")"+ |
| TRANSLET_OUTPUT_SIG); |
| |
| final int close = cpg.addMethodref(TRANSLET_CLASS, |
| "closeOutputHandler", |
| "("+TRANSLET_OUTPUT_SIG+")V"); |
| |
| // Create the new output handler (leave it on stack) |
| il.append(classGen.loadTranslet()); |
| _filename.translate(classGen, methodGen); |
| il.append(new INVOKEVIRTUAL(open)); |
| |
| // Overwrite current handler |
| il.append(methodGen.storeHandler()); |
| |
| // Translate contents with substituted handler |
| translateContents(classGen, methodGen); |
| |
| // Close the output handler (close file) |
| il.append(classGen.loadTranslet()); |
| il.append(methodGen.loadHandler()); |
| il.append(new INVOKEVIRTUAL(close)); |
| |
| // Restore old output handler from stack |
| il.append(methodGen.storeHandler()); |
| } |
| } |
| |