text: /*
   * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   */
  
  /*
   * 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.
   */
  
  package com.sun.org.apache.xalan.internal.xsltc.compiler;
  
  import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
  import com.sun.org.apache.bcel.internal.generic.INVOKESTATIC;
  import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
  import com.sun.org.apache.bcel.internal.generic.InstructionList;
  import com.sun.org.apache.bcel.internal.generic.PUSH;
  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.StringType;
  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
  import jdk.xml.internal.JdkXmlFeatures;
  
  /**
   * @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();
          final boolean isExtensionFunctionEnabled = classGen.getParser().getXSLTC()
                  .getFeature(JdkXmlFeatures.XmlFeature.ENABLE_EXTENSION_FUNCTION);
  
          if (isSecureProcessing && !isExtensionFunctionEnabled) {
              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());
      }
  }
  