Tue, 11 Dec 2012 15:05:55 -0800
8004828: refactor init of *DocImpl classes
Reviewed-by: darcy
1 /*
2 * Copyright (c) 1997, 2012, 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 */
26 package com.sun.tools.javadoc;
28 import java.lang.reflect.Modifier;
30 import com.sun.javadoc.*;
31 import com.sun.source.util.TreePath;
32 import com.sun.tools.javac.code.*;
33 import com.sun.tools.javac.code.Symbol.*;
34 import com.sun.tools.javac.code.Type;
35 import static com.sun.tools.javac.code.TypeTag.CLASS;
37 /**
38 * Represents a method of a java class.
39 *
40 * <p><b>This is NOT part of any supported API.
41 * If you write code that depends on this, you do so at your own risk.
42 * This code and its internal interfaces are subject to change or
43 * deletion without notice.</b>
44 *
45 * @since 1.2
46 * @author Robert Field
47 * @author Neal Gafter (rewrite)
48 */
50 public class MethodDocImpl
51 extends ExecutableMemberDocImpl implements MethodDoc {
53 /**
54 * constructor.
55 */
56 public MethodDocImpl(DocEnv env, MethodSymbol sym) {
57 super(env, sym);
58 }
60 /**
61 * constructor.
62 */
63 public MethodDocImpl(DocEnv env, MethodSymbol sym, TreePath treePath) {
64 super(env, sym, treePath);
65 }
67 /**
68 * Return true if it is a method, which it is.
69 * Note: constructors are not methods.
70 * This method is overridden by AnnotationTypeElementDocImpl.
71 *
72 * @return true
73 */
74 public boolean isMethod() {
75 return true;
76 }
78 /**
79 * Return true if this method is abstract
80 */
81 public boolean isAbstract() {
82 //### This is dubious, but old 'javadoc' apparently does it.
83 //### I regard this as a bug and an obstacle to treating the
84 //### doclet API as a proper compile-time reflection facility.
85 //### (maddox 09/26/2000)
86 if (containingClass().isInterface()) {
87 //### Don't force creation of ClassDocImpl for super here.
88 // Abstract modifier is implicit. Strip/canonicalize it.
89 return false;
90 }
91 return Modifier.isAbstract(getModifiers());
92 }
94 /**
95 * Get return type.
96 *
97 * @return the return type of this method, null if it
98 * is a constructor.
99 */
100 public com.sun.javadoc.Type returnType() {
101 return TypeMaker.getType(env, sym.type.getReturnType(), false);
102 }
104 /**
105 * Return the class that originally defined the method that
106 * is overridden by the current definition, or null if no
107 * such class exists.
108 *
109 * @return a ClassDocImpl representing the superclass that
110 * originally defined this method, null if this method does
111 * not override a definition in a superclass.
112 */
113 public ClassDoc overriddenClass() {
114 com.sun.javadoc.Type t = overriddenType();
115 return (t != null) ? t.asClassDoc() : null;
116 }
118 /**
119 * Return the type containing the method that this method overrides.
120 * It may be a <code>ClassDoc</code> or a <code>ParameterizedType</code>.
121 */
122 public com.sun.javadoc.Type overriddenType() {
124 if ((sym.flags() & Flags.STATIC) != 0) {
125 return null;
126 }
128 ClassSymbol origin = (ClassSymbol)sym.owner;
129 for (Type t = env.types.supertype(origin.type);
130 t.hasTag(CLASS);
131 t = env.types.supertype(t)) {
132 ClassSymbol c = (ClassSymbol)t.tsym;
133 for (Scope.Entry e = c.members().lookup(sym.name); e.scope != null; e = e.next()) {
134 if (sym.overrides(e.sym, origin, env.types, true)) {
135 return TypeMaker.getType(env, t);
136 }
137 }
138 }
139 return null;
140 }
142 /**
143 * Return the method that this method overrides.
144 *
145 * @return a MethodDoc representing a method definition
146 * in a superclass this method overrides, null if
147 * this method does not override.
148 */
149 public MethodDoc overriddenMethod() {
151 // Real overriding only. Static members are simply hidden.
152 // Likewise for constructors, but the MethodSymbol.overrides
153 // method takes this into account.
154 if ((sym.flags() & Flags.STATIC) != 0) {
155 return null;
156 }
158 // Derived from com.sun.tools.javac.comp.Check.checkOverride .
160 ClassSymbol origin = (ClassSymbol)sym.owner;
161 for (Type t = env.types.supertype(origin.type);
162 t.hasTag(CLASS);
163 t = env.types.supertype(t)) {
164 ClassSymbol c = (ClassSymbol)t.tsym;
165 for (Scope.Entry e = c.members().lookup(sym.name); e.scope != null; e = e.next()) {
166 if (sym.overrides(e.sym, origin, env.types, true)) {
167 return env.getMethodDoc((MethodSymbol)e.sym);
168 }
169 }
170 }
171 return null;
172 }
174 /**
175 * Tests whether this method overrides another.
176 * The overridden method may be one declared in a superclass or
177 * a superinterface (unlike {@link #overriddenMethod()}).
178 *
179 * <p> When a non-abstract method overrides an abstract one, it is
180 * also said to <i>implement</i> the other.
181 *
182 * @param meth the other method to examine
183 * @return <tt>true</tt> if this method overrides the other
184 */
185 public boolean overrides(MethodDoc meth) {
186 MethodSymbol overridee = ((MethodDocImpl) meth).sym;
187 ClassSymbol origin = (ClassSymbol) sym.owner;
189 return sym.name == overridee.name &&
191 // not reflexive as per JLS
192 sym != overridee &&
194 // we don't care if overridee is static, though that wouldn't
195 // compile
196 !sym.isStatic() &&
198 // sym, whose declaring type is the origin, must be
199 // in a subtype of overridee's type
200 env.types.asSuper(origin.type, overridee.owner) != null &&
202 // check access and signatures; don't check return types
203 sym.overrides(overridee, origin, env.types, false);
204 }
207 public String name() {
208 return sym.name.toString();
209 }
211 public String qualifiedName() {
212 return sym.enclClass().getQualifiedName() + "." + sym.name;
213 }
215 /**
216 * Returns a string representation of this method. Includes the
217 * qualified signature, the qualified method name, and any type
218 * parameters. Type parameters follow the class name, as they do
219 * in the syntax for invoking methods with explicit type parameters.
220 */
221 public String toString() {
222 return sym.enclClass().getQualifiedName() +
223 "." + typeParametersString() + name() + signature();
224 }
225 }