Source Code Cross Referenced for ByteListIteratorToListIteratorAdapter.java in  » Development » PCJ » bak » pcj » adapter » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Development » PCJ » bak.pcj.adapter 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  Primitive Collections for Java.
003:         *  Copyright (C) 2002, 2003  Søren Bak
004:         *
005:         *  This library is free software; you can redistribute it and/or
006:         *  modify it under the terms of the GNU Lesser General Public
007:         *  License as published by the Free Software Foundation; either
008:         *  version 2.1 of the License, or (at your option) any later version.
009:         *
010:         *  This library is distributed in the hope that it will be useful,
011:         *  but WITHOUT ANY WARRANTY; without even the implied warranty of
012:         *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013:         *  Lesser General Public License for more details.
014:         *
015:         *  You should have received a copy of the GNU Lesser General Public
016:         *  License along with this library; if not, write to the Free Software
017:         *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
018:         */
019:        package bak.pcj.adapter;
020:
021:        import bak.pcj.list.ByteListIterator;
022:        import bak.pcj.util.Exceptions;
023:        import java.util.ListIterator;
024:
025:        /**
026:         *  This class represents adaptions of primitive list iterators over
027:         *  byte values to Java Collections Framework list iterators.
028:         *
029:         *  @author     Søren Bak
030:         *  @version    1.2     21-08-2003 18:59
031:         *  @since      1.0
032:         */
033:        public class ByteListIteratorToListIteratorAdapter implements 
034:                ListIterator {
035:
036:            /** The underlying primitive iterator. */
037:            protected ByteListIterator iterator;
038:
039:            /**
040:             *  Creates a new adaption of a primitive list iterator over
041:             *  byte values to a Java Collections Framework list iterator.
042:             *
043:             *  @param      iterator
044:             *              the primitive iterator to adapt.
045:             *
046:             *  @throws     NullPointerException
047:             *              if <tt>iterator</tt> is <tt>null</tt>.
048:             */
049:            public ByteListIteratorToListIteratorAdapter(
050:                    ByteListIterator iterator) {
051:                if (iterator == null)
052:                    Exceptions.nullArgument("iterator");
053:                this .iterator = iterator;
054:            }
055:
056:            /**
057:             *  Adds a specified element to the list at this iterator's
058:             *  current position.
059:             *
060:             *  @param      o
061:             *              the element to add.
062:             *
063:             *  @throws     UnsupportedOperationException
064:             *              if addition is not supported by this
065:             *              iterator.
066:             *
067:             *  @throws     ClassCastException
068:             *              if <tt>o</tt> is not of class
069:             *              {@link Byte Byte}.
070:             *
071:             *  @throws     NullPointerException
072:             *              if <tt>o</tt> is <tt>null</tt>.
073:             */
074:            public void add(Object o) {
075:                iterator.add(((Byte) o).byteValue());
076:            }
077:
078:            /**
079:             *  Indicates whether more values can be returned by this
080:             *  iterator.
081:             *
082:             *  @return     <tt>true</tt> if more values can be returned
083:             *              by this iterator; returns <tt>false</tt>
084:             *              otherwise.
085:             *
086:             *  @see        #next()
087:             */
088:            public boolean hasNext() {
089:                return iterator.hasNext();
090:            }
091:
092:            /**
093:             *  Indicates whether more values can be returned by this
094:             *  iterator by calling <tt>previous()</tt>.
095:             *
096:             *  @return     <tt>true</tt> if more values can be returned
097:             *              by this iterator in backwards direction; returns
098:             *              <tt>false</tt> otherwise.
099:             *
100:             *  @see        #previous()
101:             */
102:            public boolean hasPrevious() {
103:                return iterator.hasPrevious();
104:            }
105:
106:            /**
107:             *  Returns the next value of this iterator.
108:             *
109:             *  @return     the next value of this iterator.
110:             *
111:             *  @throws     NoSuchElementException
112:             *              if no more elements are available from this
113:             *              iterator.
114:             *
115:             *  @see        #hasNext()
116:             */
117:            public Object next() {
118:                return new Byte(iterator.next());
119:            }
120:
121:            /**
122:             *  Returns the index of the element that would be returned by
123:             *  a call to <tt>next()</tt>.
124:             *
125:             *  @return     the index of the element that would be returned by
126:             *              a call to <tt>next()</tt>.
127:             *
128:             *  @see        #next()
129:             */
130:            public int nextIndex() {
131:                return iterator.nextIndex();
132:            }
133:
134:            /**
135:             *  Returns the previous value of this iterator.
136:             *
137:             *  @return     the previous value of this iterator.
138:             *
139:             *  @throws     NoSuchElementException
140:             *              if no more elements are available from this
141:             *              iterator in backwards direction.
142:             *
143:             *  @see        #hasPrevious()
144:             */
145:            public Object previous() {
146:                return new Byte(iterator.previous());
147:            }
148:
149:            /**
150:             *  Returns the index of the element that would be returned by
151:             *  a call to <tt>previous()</tt>.
152:             *
153:             *  @return     the index of the element that would be returned by
154:             *              a call to <tt>previous()</tt>; if no more elements
155:             *              are available in backwards direction, <tt>-1</tt>
156:             *              is returned.
157:             *
158:             *  @see        #previous()
159:             */
160:            public int previousIndex() {
161:                return iterator.previousIndex();
162:            }
163:
164:            /**
165:             *  Removes the last value returned from the underlying
166:             *  collection.
167:             *
168:             *  @throws     UnsupportedOperationException
169:             *              if removal is not supported by this iterator.
170:             *
171:             *  @throws     IllegalStateException
172:             *              if no element has been returned by this iterator
173:             *              yet.
174:             */
175:            public void remove() {
176:                iterator.remove();
177:            }
178:
179:            /**
180:             *  Sets the last element returned to a specified value.
181:             *
182:             *  @param      o
183:             *              the new value of the element.
184:             *
185:             *  @throws     UnsupportedOperationException
186:             *              if replacement is not supported by this iterator.
187:             *
188:             *  @throws     IllegalStateException
189:             *              if no element has been returned by this iterator
190:             *              yet.
191:             *
192:             *  @throws     ClassCastException
193:             *              if <tt>o</tt> is not of class
194:             *              {@link Byte Byte}.
195:             *
196:             *  @throws     NullPointerException
197:             *              if <tt>o</tt> is <tt>null</tt>.
198:             */
199:            public void set(Object o) {
200:                iterator.set(((Byte) o).byteValue());
201:            }
202:
203:        }
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