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HSQLDB example source code file (ResultBase.java)
The HSQLDB ResultBase.java source code/* Copyright (c) 2001-2008, The HSQL Development Group * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of the HSQL Development Group nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG, * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package org.hsqldb; /* * This class introduces iterator functionality to Result. * * @author fredt@users * @version 1.7.2 * @since 1.7.2 */ public class ResultBase { public Record rRoot; protected Record rTail; protected int iSize; public ResultBase() {} public ResultIterator iterator() { return new ResultIterator(); } public class ResultIterator { boolean removed; int counter; Record current = rRoot; Record last; public boolean hasNext() { return counter < iSize; } public boolean next() { if (hasNext()) { removed = false; if (counter != 0) { last = current; current = current.next; } counter++; return true; } else { return false; } } public boolean previous() { return false; } public boolean absolute(int rows) { return false; } public boolean relative(int rows) { return false; } public boolean beforeFirst() { return false; } public boolean afterLast() { return false; } public boolean isBeforeFirst() { return false; } public boolean isAfterLast() { return false; } public void remove() { if (counter <= iSize && counter != 0 &&!removed) { removed = true; if (current == rTail) { rTail = last; } if (current == rRoot) { current = rRoot = rRoot.next; } else { current = last; last = null; current.next = current.next.next; } iSize--; counter--; return; } } } } Other HSQLDB examples (source code examples)Here is a short list of links related to this HSQLDB ResultBase.java source code file: |
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