?? andqueryitem.java
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/* * Copyright (c) 2005, John Mettraux, OpenWFE.org * 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 "OpenWFE" 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 THE COPYRIGHT OWNER 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. * * $Id: AndQueryItem.java,v 1.3 2005/05/17 16:40:58 jmettraux Exp $ *///// AndQueryItem.java//// john.mettraux@openwfe.org//// generated with // jtmpl 1.1.01 2004/05/19 (john.mettraux@openwfe.org)//package openwfe.org.query.item;import openwfe.org.query.QueryException;import openwfe.org.query.QueryConfiguration;import openwfe.org.query.sets.Set;import openwfe.org.query.sets.SetUtils;import openwfe.org.query.item.QueryItem;import openwfe.org.query.item.CompositeQueryItem;/** * A basic implementation of an 'and' (intersection). * * <p><font size=2>CVS Info : * <br>$Author: jmettraux $ * <br>$Id: AndQueryItem.java,v 1.3 2005/05/17 16:40:58 jmettraux Exp $ </font> * * @author john.mettraux@openwfe.org */public abstract class AndQueryItem extends CompositeQueryItem{ private final static org.apache.log4j.Logger log = org.apache.log4j.Logger .getLogger(AndQueryItem.class.getName()); // // CONSTANTS & co // // FIELDS // // CONSTRUCTORS // // METHODS from QueryItem public Set query (final Object o) throws QueryException { if (getChildren() == null || getChildren().size() < 1) return null; Set result = null; final java.util.Iterator it = getChildren().iterator(); while (it.hasNext()) { final QueryItem qi = (QueryItem)it.next(); if (result == null) result = qi.query(o); else result = SetUtils.doIntersection(result, qi.query(o)); if (result.isEmpty()) break; } return result; } public boolean validate (final Object o) throws QueryException { if (getChildren() == null || getChildren().size() < 1) return false; final java.util.Iterator it = getChildren().iterator(); while (it.hasNext()) { final QueryItem qi = (QueryItem)it.next(); if ( ! qi.validate(o)) return false; } return true; } // // METHODS // // STATIC METHODS}
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