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   *  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: MethodType.java,v 1.2.4.1 2005/09/05 11:18:05 pvedula Exp $
   */
  
  package jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util;
  
  import java.util.Vector;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   */
  public final class MethodType extends Type {
      private final Type _resultType;
      private final Vector _argsType;
  
      public MethodType(Type resultType) {
          _argsType = null;
          _resultType = resultType;
      }
  
      public MethodType(Type resultType, Type arg1) {
          if (arg1 != Void) {
              _argsType = new Vector();
              _argsType.addElement(arg1);
          }
          else {
              _argsType = null;
          }
          _resultType = resultType;
      }
  
      public MethodType(Type resultType, Type arg1, Type arg2) {
          _argsType = new Vector(2);
          _argsType.addElement(arg1);
          _argsType.addElement(arg2);
          _resultType = resultType;
      }
  
      public MethodType(Type resultType, Type arg1, Type arg2, Type arg3) {
          _argsType = new Vector(3);
          _argsType.addElement(arg1);
          _argsType.addElement(arg2);
          _argsType.addElement(arg3);
          _resultType = resultType;
      }
  
      public MethodType(Type resultType, Vector argsType) {
          _resultType = resultType;
          _argsType = argsType.size() > 0 ? argsType : null;
      }
  
      public String toString() {
          StringBuffer result = new StringBuffer("method{");
          if (_argsType != null) {
              final int count = _argsType.size();
              for (int i=0; i<count; i++) {
                  result.append(_argsType.elementAt(i));
                  if (i != (count-1)) result.append(',');
              }
          }
          else {
              result.append("void");
          }
          result.append('}');
          return result.toString();
      }
  
      public String toSignature() {
          return toSignature("");
      }
  
      /**
       * Returns the signature of this method that results by adding
       * <code>lastArgSig</code> to the end of the argument list.
       */
      public String toSignature(String lastArgSig) {
          final StringBuffer buffer = new StringBuffer();
          buffer.append('(');
          if (_argsType != null) {
              final int n = _argsType.size();
              for (int i = 0; i < n; i++) {
                  buffer.append(((Type)_argsType.elementAt(i)).toSignature());
              }
          }
          return buffer
              .append(lastArgSig)
              .append(')')
              .append(_resultType.toSignature())
              .toString();
      }
  
      public jaxp.sun.org.apache.bcel.internal.generic.Type toJCType() {
          return null;    // should never be called
      }
  
      public boolean identicalTo(Type other) {
          boolean result = false;
          if (other instanceof MethodType) {
              final MethodType temp = (MethodType) other;
              if (_resultType.identicalTo(temp._resultType)) {
                  final int len = argsCount();
                  result = len == temp.argsCount();
                  for (int i = 0; i < len && result; i++) {
                      final Type arg1 = (Type)_argsType.elementAt(i);
                      final Type arg2 = (Type)temp._argsType.elementAt(i);
                      result = arg1.identicalTo(arg2);
                  }
              }
          }
          return result;
      }
  
      public int distanceTo(Type other) {
          int result = Integer.MAX_VALUE;
          if (other instanceof MethodType) {
              final MethodType mtype = (MethodType) other;
              if (_argsType != null) {
                  final int len = _argsType.size();
                  if (len == mtype._argsType.size()) {
                      result = 0;
                      for (int i = 0; i < len; i++) {
                          Type arg1 = (Type) _argsType.elementAt(i);
                          Type arg2 = (Type) mtype._argsType.elementAt(i);
                          final int temp = arg1.distanceTo(arg2);
                          if (temp == Integer.MAX_VALUE) {
                              result = temp;  // return MAX_VALUE
                              break;
                          }
                          else {
                              result += arg1.distanceTo(arg2);
                          }
                      }
                  }
              }
              else if (mtype._argsType == null) {
                  result = 0;   // both methods have no args
              }
          }
          return result;
      }
  
      public Type resultType() {
          return _resultType;
      }
  
      public Vector argsType() {
          return _argsType;
      }
  
      public int argsCount() {
          return _argsType == null ? 0 : _argsType.size();
      }
  }
  