Source Code Cross Referenced for DelegatingRowIterator.java in  » Database-DBMS » axion » org » axiondb » engine » rowiterators » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » axion » org.axiondb.engine.rowiterators 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $Id: DelegatingRowIterator.java,v 1.12 2005/04/22 02:28:53 ahimanikya Exp $
003:         * =======================================================================
004:         * Copyright (c) 2002-2005 Axion Development Team.  All rights reserved.
005:         *  
006:         * Redistribution and use in source and binary forms, with or without 
007:         * modification, are permitted provided that the following conditions 
008:         * are met:
009:         * 
010:         * 1. Redistributions of source code must retain the above 
011:         *    copyright notice, this list of conditions and the following 
012:         *    disclaimer. 
013:         *   
014:         * 2. Redistributions in binary form must reproduce the above copyright 
015:         *    notice, this list of conditions and the following disclaimer in 
016:         *    the documentation and/or other materials provided with the 
017:         *    distribution. 
018:         *   
019:         * 3. The names "Tigris", "Axion", nor the names of its contributors may 
020:         *    not be used to endorse or promote products derived from this 
021:         *    software without specific prior written permission. 
022:         *  
023:         * 4. Products derived from this software may not be called "Axion", nor 
024:         *    may "Tigris" or "Axion" appear in their names without specific prior
025:         *    written permission.
026:         *   
027:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
028:         * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
029:         * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
030:         * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
031:         * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
032:         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
033:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
034:         * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
035:         * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
036:         * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
037:         * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
038:         * =======================================================================
039:         */
040:
041:        package org.axiondb.engine.rowiterators;
042:
043:        import org.axiondb.AxionException;
044:        import org.axiondb.Row;
045:        import org.axiondb.RowIterator;
046:
047:        /**
048:         * An abstract base {@link RowIterator}that delegates all calls to a wrapped instance.
049:         * 
050:         * @version $Revision: 1.12 $ $Date: 2005/04/22 02:28:53 $
051:         * @author Rodney Waldhoff
052:         */
053:        public abstract class DelegatingRowIterator implements  RowIterator {
054:
055:            public DelegatingRowIterator(RowIterator iter) {
056:                setDelegate(iter);
057:            }
058:
059:            public void add(Row row) throws AxionException {
060:                _delegate.add(row);
061:            }
062:
063:            public Row current() {
064:                return _delegate.current();
065:            }
066:
067:            public int currentIndex() {
068:                return _delegate.currentIndex();
069:            }
070:
071:            public Row first() throws AxionException {
072:                return _delegate.first();
073:            }
074:
075:            public boolean hasCurrent() {
076:                return _delegate.hasCurrent();
077:            }
078:
079:            public boolean hasNext() {
080:                return _delegate.hasNext();
081:            }
082:
083:            public boolean hasPrevious() {
084:                return _delegate.hasPrevious();
085:            }
086:
087:            public boolean isEmpty() {
088:                return (!hasNext() && !hasPrevious() && !hasCurrent());
089:            }
090:
091:            public Row last() throws AxionException {
092:                return _delegate.last();
093:            }
094:
095:            public Row next() throws AxionException {
096:                return _delegate.next();
097:            }
098:
099:            public int next(int count) throws AxionException {
100:                return _delegate.next(count);
101:            }
102:
103:            public int nextIndex() {
104:                return _delegate.nextIndex();
105:            }
106:
107:            public Row peekNext() throws AxionException {
108:                return _delegate.peekNext();
109:            }
110:
111:            public Row peekPrevious() throws AxionException {
112:                return _delegate.peekPrevious();
113:            }
114:
115:            public Row previous() throws AxionException {
116:                return _delegate.previous();
117:            }
118:
119:            public int previous(int count) throws AxionException {
120:                return _delegate.previous(count);
121:            }
122:
123:            public int previousIndex() {
124:                return _delegate.previousIndex();
125:            }
126:
127:            public void remove() throws AxionException {
128:                _delegate.remove();
129:            }
130:
131:            public void reset() throws AxionException {
132:                _delegate.reset();
133:            }
134:
135:            public void set(Row row) throws AxionException {
136:                _delegate.set(row);
137:            }
138:
139:            public int size() throws AxionException {
140:                return _delegate.size();
141:            }
142:
143:            protected RowIterator getDelegate() {
144:                return _delegate;
145:            }
146:
147:            protected void setDelegate(RowIterator delegate) {
148:                _delegate = delegate;
149:            }
150:
151:            private RowIterator _delegate = null;
152:        }
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