1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package jdk.internal.nicl.types;
  25 
  26 import java.util.Arrays;
  27 import java.util.stream.Stream;
  28 
  29 public class Function implements Type {
  30     final Type[] arguments;
  31     final Type returnType;
  32     final boolean isVarArg;
  33 
  34     public Function(Type[] args, Type returnType, boolean isVarArg) {
  35         this.arguments = args;
  36         this.returnType = returnType;
  37         this.isVarArg = isVarArg;
  38     }
  39 
  40     public boolean isVarArg() {
  41         return isVarArg;
  42     }
  43 
  44     public Stream<Type> arguments() {
  45         return Stream.of(arguments);
  46     }
  47 
  48     public int argumentCount() {
  49         return arguments.length;
  50     }
  51 
  52     public Type getArgumentType(int index) {
  53         return arguments[index];
  54     }
  55 
  56     public Type getReturnType() {
  57         return returnType;
  58     }
  59 
  60     @Override
  61     public long getSize() {
  62         throw new UnsupportedOperationException("Function type has no size");
  63     }
  64 
  65     @Override
  66     public int hashCode() {
  67         return (returnType.hashCode() * 31 + Arrays.hashCode(arguments)) << 1 + (isVarArg ? 1 : 0);
  68     }
  69 
  70     @Override
  71     public boolean equals(Object o) {
  72         if (!(o instanceof jdk.internal.nicl.types.Function)) {
  73             return false;
  74         }
  75         jdk.internal.nicl.types.Function other = (jdk.internal.nicl.types.Function) o;
  76         if (!other.returnType.equals(returnType)) {
  77             return false;
  78         }
  79         if (other.isVarArg != isVarArg) {
  80             return false;
  81         }
  82         if (other.arguments.length != arguments.length) {
  83             return false;
  84         }
  85         for (int i = 0; i < arguments.length; i++) {
  86             if (!arguments[i].equals(other.arguments[i])) {
  87                 return false;
  88             }
  89         }
  90         return true;
  91     }
  92 
  93     @Override
  94     public String toString() {
  95         StringBuffer sb = new StringBuffer();
  96         sb.append('(');
  97         for (Type arg : arguments) {
  98             sb.append(arg.toString());
  99         }
 100         if (isVarArg) {
 101             sb.append('*');
 102         }
 103         sb.append(')');
 104         sb.append(returnType.toString());
 105         return sb.toString();
 106     }
 107 }
--- EOF ---