1 /*
2 * Copyright (c) 2000, 2003, 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.corba.se.impl.dynamicany;
27
28 import org.omg.CORBA.TypeCode;
29 import org.omg.CORBA.Any;
30 import org.omg.CORBA.BAD_OPERATION;
31 import org.omg.CORBA.TypeCodePackage.BadKind;
32 import org.omg.CORBA.TypeCodePackage.Bounds;
33 import org.omg.CORBA.portable.InputStream;
34 import org.omg.CORBA.portable.OutputStream;
35 import org.omg.DynamicAny.*;
36 import org.omg.DynamicAny.DynAnyPackage.TypeMismatch;
37 import org.omg.DynamicAny.DynAnyPackage.InvalidValue;
38 import org.omg.DynamicAny.DynAnyFactoryPackage.InconsistentTypeCode;
39
40 import com.sun.corba.se.spi.orb.ORB ;
41 import com.sun.corba.se.spi.logging.CORBALogDomains ;
42 import com.sun.corba.se.impl.logging.ORBUtilSystemException ;
43
44 // _REVIST_ Could make this a subclass of DynArrayImpl
45 // But that would mean that an object that implements DynSequence also implements DynArray
46 // which the spec doesn't mention (it also doesn't forbid it).
47 public class DynSequenceImpl extends DynAnyCollectionImpl implements DynSequence
48 {
49 //
50 // Constructors
51 //
52
53 private DynSequenceImpl() {
54 this(null, (Any)null, false);
55 }
56
57 protected DynSequenceImpl(ORB orb, Any any, boolean copyValue) {
58 super(orb, any, copyValue);
59 }
60
61 // Sets the current position to -1 and creates an empty sequence.
62 protected DynSequenceImpl(ORB orb, TypeCode typeCode) {
63 super(orb, typeCode);
64 }
65
66 // Initializes components and anys representation
67 // from the Any representation
68 protected boolean initializeComponentsFromAny() {
69 // This typeCode is of kind tk_sequence.
70 TypeCode typeCode = any.type();
71 int length;
72 TypeCode contentType = getContentType();
73 InputStream input;
74
75 try {
76 input = any.create_input_stream();
77 } catch (BAD_OPERATION e) {
78 return false;
79 }
80
81 length = input.read_long();
82 components = new DynAny[length];
83 anys = new Any[length];
84
85 for (int i=0; i<length; i++) {
86 // _REVISIT_ Could use read_xxx_array() methods on InputStream for efficiency
87 // but only for primitive types
88 anys[i] = DynAnyUtil.extractAnyFromStream(contentType, input, orb);
89 try {
90 // Creates the appropriate subtype without copying the Any
91 components[i] = DynAnyUtil.createMostDerivedDynAny(anys[i], orb, false);
92 } catch (InconsistentTypeCode itc) { // impossible
93 }
94 }
95 return true;
96 }
97
98 // Sets the current position to -1 and creates an empty sequence.
99 protected boolean initializeComponentsFromTypeCode() {
100 // already done in the type code constructor
101 components = new DynAny[0];
102 anys = new Any[0];
103 return true;
104 }
105
106 // Collapses the whole DynAny hierarchys values into one single streamed Any
107 protected boolean initializeAnyFromComponents() {
108 OutputStream out = any.create_output_stream();
109 // Writing the length first is the only difference to supers implementation
110 out.write_long(components.length);
111 for (int i=0; i<components.length; i++) {
112 if (components[i] instanceof DynAnyImpl) {
113 ((DynAnyImpl)components[i]).writeAny(out);
114 } else {
115 // Not our implementation. Nothing we can do to prevent copying.
116 components[i].to_any().write_value(out);
117 }
118 }
119 any.read_value(out.create_input_stream(), any.type());
120 return true;
121 }
122
123
124 //
125 // DynSequence interface methods
126 //
127
128 // Returns the current length of the sequence
129 public int get_length() {
130 if (status == STATUS_DESTROYED) {
131 throw wrapper.dynAnyDestroyed() ;
132 }
133 return (checkInitComponents() ? components.length : 0);
134 }
135
136 // Sets the length of the sequence. Increasing the length of a sequence
137 // adds new elements at the tail without affecting the values of already
138 // existing elements. Newly added elements are default-initialized.
139 //
140 // Increasing the length of a sequence sets the current position to the first
141 // newly-added element if the previous current position was -1.
142 // Otherwise, if the previous current position was not -1,
143 // the current position is not affected.
144 //
145 // Increasing the length of a bounded sequence to a value larger than the bound
146 // raises InvalidValue.
147 //
148 // Decreasing the length of a sequence removes elements from the tail
149 // without affecting the value of those elements that remain.
150 // The new current position after decreasing the length of a sequence is determined
151 // as follows:
152 // ?f the length of the sequence is set to zero, the current position is set to -1.
153 // ?f the current position is -1 before decreasing the length, it remains at -1.
154 // ?f the current position indicates a valid element and that element is not removed
155 // when the length is decreased, the current position remains unaffected.
156 // ?f the current position indicates a valid element and that element is removed, the
157 // current position is set to -1.
158 public void set_length(int len)
159 throws org.omg.DynamicAny.DynAnyPackage.InvalidValue
160 {
161 if (status == STATUS_DESTROYED) {
162 throw wrapper.dynAnyDestroyed() ;
163 }
164 int bound = getBound();
165 if (bound > 0 && len > bound) {
166 throw new InvalidValue();
167 }
168
169 checkInitComponents();
170
171 int oldLength = components.length;
172 if (len > oldLength) {
173 // Increase length
174 DynAny[] newComponents = new DynAny[len];
175 Any[] newAnys = new Any[len];
176 System.arraycopy(components, 0, newComponents, 0, oldLength);
177 System.arraycopy(anys, 0, newAnys, 0, oldLength);
178 components = newComponents;
179 anys = newAnys;
180
181 // Newly added elements are default-initialized
182 TypeCode contentType = getContentType();
183 for (int i=oldLength; i<len; i++) {
184 createDefaultComponentAt(i, contentType);
185 }
186
187 // Increasing the length of a sequence sets the current position to the first
188 // newly-added element if the previous current position was -1.
189 if (index == NO_INDEX)
190 index = oldLength;
191 } else if (len < oldLength) {
192 // Decrease length
193 DynAny[] newComponents = new DynAny[len];
194 Any[] newAnys = new Any[len];
195 System.arraycopy(components, 0, newComponents, 0, len);
196 System.arraycopy(anys, 0, newAnys, 0, len);
197 // It is probably right not to destroy the released component DynAnys.
198 // Some other DynAny or a user variable might still hold onto them
199 // and if not then the garbage collector will take care of it.
200 //for (int i=len; i<oldLength; i++) {
201 // components[i].destroy();
202 //}
203 components = newComponents;
204 anys = newAnys;
205
206 // ?f the length of the sequence is set to zero, the current position is set to -1.
207 // ?f the current position is -1 before decreasing the length, it remains at -1.
208 // ?f the current position indicates a valid element and that element is not removed
209 // when the length is decreased, the current position remains unaffected.
210 // ?f the current position indicates a valid element and that element is removed,
211 // the current position is set to -1.
212 if (len == 0 || index >= len) {
213 index = NO_INDEX;
214 }
215 } else {
216 // Length unchanged
217 // Maybe components is now default initialized from type code
218 if (index == NO_INDEX && len > 0) {
219 index = 0;
220 }
221 }
222 }
223
224 // Initializes the elements of the sequence.
225 // The length of the DynSequence is set to the length of value.
226 // The current position is set to zero if value has non-zero length
227 // and to -1 if value is a zero-length sequence.
228 // If the length of value exceeds the bound of a bounded sequence,
229 // the operation raises InvalidValue.
230 // If value contains one or more elements whose TypeCode is not equivalent
231 // to the element TypeCode of the DynSequence, the operation raises TypeMismatch.
232 /*
233 public void set_elements(org.omg.CORBA.Any[] value)
234 throws org.omg.DynamicAny.DynAnyPackage.TypeMismatch,
235 org.omg.DynamicAny.DynAnyPackage.InvalidValue;
236 */
237
238 //
239 // Utility methods
240 //
241
242 protected void checkValue(Object[] value)
243 throws org.omg.DynamicAny.DynAnyPackage.InvalidValue
244 {
245 if (value == null || value.length == 0) {
246 clearData();
247 index = NO_INDEX;
248 return;
249 } else {
250 index = 0;
251 }
252 int bound = getBound();
253 if (bound > 0 && value.length > bound) {
254 throw new InvalidValue();
255 }
256 }
257 }