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My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

Showing the changes to java/pkg/com/sun/beans/WildcardTypeImpl.java (1 of 18352 files). Show all

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java/pkg/com/sun/beans/WildcardTypeImpl.java+161−0
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1+/*
2+ * Copyright (c) 2003, 2006, 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+package com.sun.beans;
26+
27+import java.lang.reflect.Type;
28+import java.lang.reflect.WildcardType;
29+import java.util.Arrays;
30+
31+/**
32+ * This class implements {@link WildcardType WildcardType} compatibly with the JDK's
33+ * {@link sun.reflect.generics.reflectiveObjects.WildcardTypeImpl WildcardTypeImpl}.
34+ * Unfortunately we can't use the JDK's
35+ * {@link sun.reflect.generics.reflectiveObjects.WildcardTypeImpl WildcardTypeImpl} here as we do for
36+ * {@link sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl ParameterizedTypeImpl} and
37+ * {@link sun.reflect.generics.reflectiveObjects.GenericArrayTypeImpl GenericArrayTypeImpl},
38+ * because {@link sun.reflect.generics.reflectiveObjects.WildcardTypeImpl WildcardTypeImpl}'s
39+ * constructor takes parameters representing intermediate structures obtained during class-file parsing.
40+ * We could reconstruct versions of those structures but it would be more trouble than it's worth.
41+ *
42+ * @since 1.7
43+ *
44+ * @author Eamonn McManus
45+ * @author Sergey Malenkov
46+ */
47+final class WildcardTypeImpl implements WildcardType {
48+ private final Type[] upperBounds;
49+ private final Type[] lowerBounds;
50+
51+ /**
52+ * Creates a wildcard type with the requested bounds.
53+ * Note that the array arguments are not cloned
54+ * because instances of this class are never constructed
55+ * from outside the containing package.
56+ *
57+ * @param upperBounds the array of types representing
58+ * the upper bound(s) of this type variable
59+ * @param lowerBounds the array of types representing
60+ * the lower bound(s) of this type variable
61+ */
62+ WildcardTypeImpl(Type[] upperBounds, Type[] lowerBounds) {
63+ this.upperBounds = upperBounds;
64+ this.lowerBounds = lowerBounds;
65+ }
66+
67+ /**
68+ * Returns an array of {@link Type Type} objects
69+ * representing the upper bound(s) of this type variable.
70+ * Note that if no upper bound is explicitly declared,
71+ * the upper bound is {@link Object Object}.
72+ *
73+ * @return an array of types representing
74+ * the upper bound(s) of this type variable
75+ */
76+ public Type[] getUpperBounds() {
77+ return this.upperBounds.clone();
78+ }
79+
80+ /**
81+ * Returns an array of {@link Type Type} objects
82+ * representing the lower bound(s) of this type variable.
83+ * Note that if no lower bound is explicitly declared,
84+ * the lower bound is the type of {@code null}.
85+ * In this case, a zero length array is returned.
86+ *
87+ * @return an array of types representing
88+ * the lower bound(s) of this type variable
89+ */
90+ public Type[] getLowerBounds() {
91+ return this.lowerBounds.clone();
92+ }
93+
94+ /**
95+ * Indicates whether some other object is "equal to" this one.
96+ * It is implemented compatibly with the JDK's
97+ * {@link sun.reflect.generics.reflectiveObjects.WildcardTypeImpl WildcardTypeImpl}.
98+ *
99+ * @param object the reference object with which to compare
100+ * @return {@code true} if this object is the same as the object argument;
101+ * {@code false} otherwise
102+ * @see sun.reflect.generics.reflectiveObjects.WildcardTypeImpl#equals
103+ */
104+ @Override
105+ public boolean equals(Object object) {
106+ if (object instanceof WildcardType) {
107+ WildcardType type = (WildcardType) object;
108+ return Arrays.equals(this.upperBounds, type.getUpperBounds())
109+ && Arrays.equals(this.lowerBounds, type.getLowerBounds());
110+ }
111+ return false;
112+ }
113+
114+ /**
115+ * Returns a hash code value for the object.
116+ * It is implemented compatibly with the JDK's
117+ * {@link sun.reflect.generics.reflectiveObjects.WildcardTypeImpl WildcardTypeImpl}.
118+ *
119+ * @return a hash code value for this object
120+ * @see sun.reflect.generics.reflectiveObjects.WildcardTypeImpl#hashCode
121+ */
122+ @Override
123+ public int hashCode() {
124+ return Arrays.hashCode(this.upperBounds)
125+ ^ Arrays.hashCode(this.lowerBounds);
126+ }
127+
128+ /**
129+ * Returns a string representation of the object.
130+ * It is implemented compatibly with the JDK's
131+ * {@link sun.reflect.generics.reflectiveObjects.WildcardTypeImpl WildcardTypeImpl}.
132+ *
133+ * @return a string representation of the object
134+ * @see sun.reflect.generics.reflectiveObjects.WildcardTypeImpl#toString
135+ */
136+ @Override
137+ public String toString() {
138+ StringBuilder sb;
139+ Type[] bounds;
140+ if (this.lowerBounds.length == 0) {
141+ if (this.upperBounds.length == 0 || Object.class == this.upperBounds[0]) {
142+ return "?";
143+ }
144+ bounds = this.upperBounds;
145+ sb = new StringBuilder("? extends ");
146+ }
147+ else {
148+ bounds = this.lowerBounds;
149+ sb = new StringBuilder("? super ");
150+ }
151+ for (int i = 0; i < bounds.length; i++) {
152+ if (i > 0) {
153+ sb.append(" & ");
154+ }
155+ sb.append((bounds[i] instanceof Class)
156+ ? ((Class) bounds[i]).getName()
157+ : bounds[i].toString());
158+ }
159+ return sb.toString();
160+ }
161+}