1 /*
   2  * Copyright (c) 2014, 2018, 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.beans.introspect;
  27 



  28 import java.lang.reflect.Method;
  29 import java.lang.reflect.Modifier;
  30 import java.lang.reflect.Type;
  31 import java.util.ArrayList;

  32 import java.util.Collections;
  33 import java.util.Comparator;
  34 import java.util.List;
  35 
  36 import com.sun.beans.TypeResolver;
  37 import com.sun.beans.finder.MethodFinder;
  38 
  39 final class MethodInfo {
  40     final Method method;
  41     final Class<?> type;
  42 
  43     MethodInfo(Method method, Class<?> type) {
  44         this.method = method;
  45         this.type = type;
  46     }
  47 
  48     MethodInfo(Method method, Type type) {
  49         this.method = method;
  50         this.type = resolve(method, type);
  51     }
  52 
  53     boolean isThrow(Class<?> exception) {
  54         for (Class<?> type : this.method.getExceptionTypes()) {
  55             if (type == exception) {
  56                 return true;
  57             }
  58         }
  59         return false;
  60     }
  61 
  62     static Class<?> resolve(Method method, Type type) {
  63         return TypeResolver.erase(TypeResolver.resolveInClass(method.getDeclaringClass(), type));
  64     }
  65 
  66     static List<Method> get(Class<?> type) {
  67         List<Method> list = null;
  68         if (type != null) {
  69             boolean inaccessible = !Modifier.isPublic(type.getModifiers());
  70             for (Method method : type.getMethods()) {
  71                 if (method.getDeclaringClass().equals(type)) {
  72                     if (inaccessible) {
  73                         try {
  74                             method = MethodFinder.findAccessibleMethod(method);
  75                             if (!method.getDeclaringClass().isInterface()) {
  76                                 method = null; // ignore methods from superclasses
  77                             }
  78                         } catch (NoSuchMethodException exception) {
  79                             // commented out because of 6976577
  80                             // method = null; // ignore inaccessible methods
  81                         }
  82                     }
  83                     if (method != null) {
  84                         if (list == null) {
  85                             list = new ArrayList<>();
  86                         }
  87                         list.add(method);
  88                     }
  89                 }
  90             }
  91         }
  92         if (list != null) {
  93             list.sort(MethodOrder.instance);
  94             return Collections.unmodifiableList(list);
  95         }
  96         return Collections.emptyList();
  97     }
  98 
  99     /**
 100      * A comparator that defines a total order so that methods have the same
 101      * name and identical signatures appear next to each others. The methods are
 102      * sorted in such a way that methods which override each other will sit next
 103      * to each other, with the overridden method last - e.g. is Integer getFoo()
 104      * placed before Object getFoo().
 105      **/
 106     private static final class MethodOrder implements Comparator<Method> {
 107 
 108         /*
 109          * Code particularly was copied from com.sun.jmx.mbeanserver.MethodOrder
 110          */
 111         @Override
 112         public int compare(final Method a, final Method b) {
 113             int cmp = a.getName().compareTo(b.getName());
 114             if (cmp != 0) {
 115                 return cmp;
 116             }
 117             final Class<?>[] aparams = a.getParameterTypes();
 118             final Class<?>[] bparams = b.getParameterTypes();
 119             if (aparams.length != bparams.length) {
 120                 return aparams.length - bparams.length;
 121             }
 122             for (int i = 0; i < aparams.length; ++i) {
 123                 final Class<?> aparam = aparams[i];
 124                 final Class<?> bparam = bparams[i];
 125                 if (aparam == bparam) {
 126                     continue;
 127                 }
 128                 cmp = aparam.getName().compareTo(bparam.getName());
 129                 if (cmp != 0) {
 130                     return cmp;
 131                 }
 132             }
 133             final Class<?> aret = a.getReturnType();
 134             final Class<?> bret = b.getReturnType();
 135             if (aret == bret) {
 136                 return 0;
 137             }
 138 
 139             // Super type comes last: Integer, Number, Object
 140             if (aret.isAssignableFrom(bret)) {
 141                 return 1;
 142             }
 143             if (bret.isAssignableFrom(aret)) {
 144                 return -1;
 145             }
 146             return aret.getName().compareTo(bret.getName());
 147         }
 148 
 149         static final MethodOrder instance = new MethodOrder();
 150     }
 151 }
--- EOF ---