content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 2001-2004 The Apache Software Foundation.
   *
   * Licensed 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: Message.java,v 1.2.4.1 2005/09/02 06:47:02 pvedula Exp $
   */
  
  package jaxp.sun.org.apache.xalan.internal.xsltc.compiler;
  
  import jaxp.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
  import jaxp.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
  import jaxp.sun.org.apache.bcel.internal.generic.INVOKESPECIAL;
  import jaxp.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
  import jaxp.sun.org.apache.bcel.internal.generic.InstructionList;
  import jaxp.sun.org.apache.bcel.internal.generic.NEW;
  import jaxp.sun.org.apache.bcel.internal.generic.PUSH;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   * @author Morten Jorgensen
   */
  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 INVOKEINTERFACE(
                      cpg.addInterfaceMethodref(TRANSLET_OUTPUT_INTERFACE,
                                                "setWriter",
                                                "("+WRITER_SIG+")V"), 2));
  
                  // Invoke output.setEncoding("UTF-8")
                  il.append(methodGen.loadHandler());
                  il.append(new PUSH(cpg, "UTF-8"));   // other encodings?
                  il.append(new INVOKEINTERFACE(
                      cpg.addInterfaceMethodref(TRANSLET_OUTPUT_INTERFACE,
                                                "setEncoding",
                                                "("+STRING_SIG+")V"), 2));
  
                  // Invoke output.setOmitXMLDeclaration(true)
                  il.append(methodGen.loadHandler());
                  il.append(ICONST_1);
                  il.append(new INVOKEINTERFACE(
                      cpg.addInterfaceMethodref(TRANSLET_OUTPUT_INTERFACE,
                                                "setOmitXMLDeclaration",
                                                "(Z)V"), 2));
  
                  il.append(methodGen.loadHandler());
                  il.append(new INVOKEINTERFACE(
                      cpg.addInterfaceMethodref(TRANSLET_OUTPUT_INTERFACE,
                                                "startDocument",
                                                "()V"), 1));
  
                  // Inline translation of contents
                  translateContents(classGen, methodGen);
  
                  il.append(methodGen.loadHandler());
                  il.append(new INVOKEINTERFACE(
                      cpg.addInterfaceMethodref(TRANSLET_OUTPUT_INTERFACE,
                                                "endDocument",
                                                "()V"), 1));
  
                  // 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);
          }
      }
  
  }
  