| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * $Id$ |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import org.apache.bcel.generic.ConstantPoolGen; |
| import org.apache.bcel.generic.INVOKESTATIC; |
| 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.StringType; |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.xalan.xsltc.compiler.util.TypeCheckError; |
| import org.apache.xalan.xsltc.compiler.util.Util; |
| |
| /** |
| * @author Morten Jorgensen |
| */ |
| final class TransletOutput extends Instruction { |
| |
| private Expression _filename; |
| private boolean _append; |
| |
| /** |
| * 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"); |
| |
| // If the 'append' attribute is set to "yes" or "true", |
| // the output is appended to the file. |
| String append = getAttribute("append"); |
| |
| // 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); |
| |
| if (append != null && (append.toLowerCase().equals("yes") || |
| append.toLowerCase().equals("true"))) { |
| _append = true; |
| } |
| else |
| _append = false; |
| |
| 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(); |
| final boolean isSecureProcessing = classGen.getParser().getXSLTC() |
| .isSecureProcessing(); |
| |
| if (isSecureProcessing) { |
| int index = cpg.addMethodref(BASIS_LIBRARY_CLASS, |
| "unallowed_extension_elementF", |
| "(Ljava/lang/String;)V"); |
| il.append(new PUSH(cpg, "redirect")); |
| il.append(new INVOKESTATIC(index)); |
| return; |
| } |
| |
| // Save the current output handler on the stack |
| il.append(methodGen.loadHandler()); |
| |
| final int open = cpg.addMethodref(TRANSLET_CLASS, |
| "openOutputHandler", |
| "(" + STRING_SIG + "Z)" + |
| 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 PUSH(cpg, _append)); |
| 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()); |
| } |
| } |
| |