1 /*
2 * Copyright 1999-2004 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package javax.naming.spi;
27
28 import javax.naming.Name;
29 import javax.naming.Context;
30 import javax.naming.CompositeName;
31 import javax.naming.InvalidNameException;
32
33 /**
34 * This class represents the result of resolution of a name.
35 * It contains the object to which name was resolved, and the portion
36 * of the name that has not been resolved.
37 *<p>
38 * A ResolveResult instance is not synchronized against concurrent
39 * multithreaded access. Multiple threads trying to access and modify
40 * a single ResolveResult instance should lock the object.
41 *
42 * @author Rosanna Lee
43 * @author Scott Seligman
44 * @since 1.3
45 */
46 public class ResolveResult implements java.io.Serializable {
47 /**
48 * Field containing the Object that was resolved to successfully.
49 * It can be null only when constructed using a subclass.
50 * Constructors should always initialize this.
51 * @serial
52 */
53 protected Object resolvedObj;
54 /**
55 * Field containing the remaining name yet to be resolved.
56 * It can be null only when constructed using a subclass.
57 * Constructors should always initialize this.
58 * @serial
59 */
60 protected Name remainingName;
61
62 /**
63 * Constructs an instance of ResolveResult with the
64 * resolved object and remaining name both initialized to null.
65 */
66 protected ResolveResult() {
67 resolvedObj = null;
68 remainingName = null;
69 }
70
71 /**
72 * Constructs a new instance of ResolveResult consisting of
73 * the resolved object and the remaining unresolved component.
74 *
75 * @param robj The non-null object resolved to.
76 * @param rcomp The single remaining name component that has yet to be
77 * resolved. Cannot be null (but can be empty).
78 */
79 public ResolveResult(Object robj, String rcomp) {
80 resolvedObj = robj;
81 try {
82 remainingName = new CompositeName(rcomp);
83 // remainingName.appendComponent(rcomp);
84 } catch (InvalidNameException e) {
85 // ignore; shouldn't happen
86 }
87 }
88
89 /**
90 * Constructs a new instance of ResolveResult consisting of
91 * the resolved Object and the remaining name.
92 *
93 * @param robj The non-null Object resolved to.
94 * @param rname The non-null remaining name that has yet to be resolved.
95 */
96 public ResolveResult(Object robj, Name rname) {
97 resolvedObj = robj;
98 setRemainingName(rname);
99 }
100
101 /**
102 * Retrieves the remaining unresolved portion of the name.
103 *
104 * @return The remaining unresolved portion of the name.
105 * Cannot be null but empty OK.
106 * @see #appendRemainingName
107 * @see #appendRemainingComponent
108 * @see #setRemainingName
109 */
110 public Name getRemainingName() {
111 return this.remainingName;
112 }
113
114 /**
115 * Retrieves the Object to which resolution was successful.
116 *
117 * @return The Object to which resolution was successful. Cannot be null.
118 * @see #setResolvedObj
119 */
120 public Object getResolvedObj() {
121 return this.resolvedObj;
122 }
123
124 /**
125 * Sets the remaining name field of this result to name.
126 * A copy of name is made so that modifying the copy within
127 * this ResolveResult does not affect <code>name</code> and
128 * vice versa.
129 *
130 * @param name The name to set remaining name to. Cannot be null.
131 * @see #getRemainingName
132 * @see #appendRemainingName
133 * @see #appendRemainingComponent
134 */
135 public void setRemainingName(Name name) {
136 if (name != null)
137 this.remainingName = (Name)(name.clone());
138 else {
139 // ??? should throw illegal argument exception
140 this.remainingName = null;
141 }
142 }
143
144 /**
145 * Adds components to the end of remaining name.
146 *
147 * @param name The components to add. Can be null.
148 * @see #getRemainingName
149 * @see #setRemainingName
150 * @see #appendRemainingComponent
151 */
152 public void appendRemainingName(Name name) {
153 // System.out.println("appendingRemainingName: " + name.toString());
154 // Exception e = new Exception();
155 // e.printStackTrace();
156 if (name != null) {
157 if (this.remainingName != null) {
158 try {
159 this.remainingName.addAll(name);
160 } catch (InvalidNameException e) {
161 // ignore; shouldn't happen for composite name
162 }
163 } else {
164 this.remainingName = (Name)(name.clone());
165 }
166 }
167 }
168
169 /**
170 * Adds a single component to the end of remaining name.
171 *
172 * @param name The component to add. Can be null.
173 * @see #getRemainingName
174 * @see #appendRemainingName
175 */
176 public void appendRemainingComponent(String name) {
177 if (name != null) {
178 CompositeName rname = new CompositeName();
179 try {
180 rname.add(name);
181 } catch (InvalidNameException e) {
182 // ignore; shouldn't happen for empty composite name
183 }
184 appendRemainingName(rname);
185 }
186 }
187
188 /**
189 * Sets the resolved Object field of this result to obj.
190 *
191 * @param obj The object to use for setting the resolved obj field.
192 * Cannot be null.
193 * @see #getResolvedObj
194 */
195 public void setResolvedObj(Object obj) {
196 this.resolvedObj = obj;
197 // ??? should check for null?
198 }
199
200 private static final long serialVersionUID = -4552108072002407559L;
201 }
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