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: VoidType.java,v 1.2.4.1 2005/09/05 11:45:26 pvedula Exp $
   */
  
  package jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util;
  
  import jaxp.sun.org.apache.bcel.internal.generic.Instruction;
  import jaxp.sun.org.apache.bcel.internal.generic.InstructionList;
  import jaxp.sun.org.apache.bcel.internal.generic.PUSH;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.Constants;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   */
  public final class VoidType extends Type {
      protected VoidType() {}
  
      public String toString() {
          return "void";
      }
  
      public boolean identicalTo(Type other) {
          return this == other;
      }
  
      public String toSignature() {
          return "V";
      }
  
      public jaxp.sun.org.apache.bcel.internal.generic.Type toJCType() {
          return null;    // should never be called
      }
  
      public Instruction POP() {
          return NOP;
      }
  
      /**
       * Translates a void into an object of internal type <code>type</code>.
       * This translation is needed when calling external functions
       * that return void.
       *
       * @see     Type#translateTo
       */
      public void translateTo(ClassGenerator classGen, MethodGenerator methodGen,
                              Type type) {
          if (type == String) {
              translateTo(classGen, methodGen, (StringType) type);
          }
          else {
              ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR,
                                          toString(), type.toString());
              classGen.getParser().reportError(Constants.FATAL, err);
          }
      }
  
      /**
       * Translates a void into a string by pushing the empty string ''.
       *
       * @see     Type#translateTo
       */
      public void translateTo(ClassGenerator classGen, MethodGenerator methodGen,
                              StringType type) {
          final InstructionList il = methodGen.getInstructionList();
          il.append(new PUSH(classGen.getConstantPool(), ""));
      }
  
      /**
       * Translates an external (primitive) Java type into a void.
       * Only an external "void" can be converted to this class.
       */
      public void translateFrom(ClassGenerator classGen, MethodGenerator methodGen,
                                Class clazz) {
          if (!clazz.getName().equals("void")) {
              ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR,
                                          toString(), clazz.getName());
              classGen.getParser().reportError(Constants.FATAL, err);
          }
      }
  }
  