| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2002 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. 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. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowlegement: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "The Jakarta Project", "Ant", and "Apache Software |
| * Foundation" must not be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR |
| * ITS 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| package org.apache.tools.ant.types.selectors; |
| |
| import java.io.File; |
| import java.util.Enumeration; |
| |
| /** |
| * This selector is here just to shake up your thinking a bit. Don't get |
| * too caught up in boolean, there are other ways you can evaluate a |
| * collection of selectors. This one takes a vote of the selectors it |
| * contains, and majority wins. You could also have an "all-but-one" |
| * selector, a "weighted-average" selector, and so on. These are left |
| * as exercises for the reader (as are the usecases where this would |
| * be necessary). |
| * |
| * @author <a href="mailto:bruce@callenish.com">Bruce Atherton</a> |
| * @since 1.5 |
| */ |
| public class MajoritySelector extends BaseSelectorContainer { |
| |
| private boolean allowtie = true; |
| |
| /** |
| * Default constructor. |
| */ |
| public MajoritySelector() { |
| } |
| |
| public String toString() { |
| StringBuffer buf = new StringBuffer(); |
| if (hasSelectors()) { |
| buf.append("{majorityselect: "); |
| buf.append(super.toString()); |
| buf.append("}"); |
| } |
| return buf.toString(); |
| } |
| |
| public void setAllowtie(boolean tiebreaker) { |
| allowtie = tiebreaker; |
| } |
| |
| /** |
| * Returns true (the file is selected) if most of the other selectors |
| * agree. In case of a tie, go by the allowtie setting. That defaults |
| * to true, meaning in case of a tie, the file is selected. |
| * |
| * @param basedir the base directory the scan is being done from |
| * @param filename is the name of the file to check |
| * @param file is a java.io.File object for the filename that the selector |
| * can use |
| * @return whether the file should be selected or not |
| */ |
| public boolean isSelected(File basedir, String filename, File file) { |
| validate(); |
| int yesvotes = 0; |
| int novotes = 0; |
| Enumeration e = selectorElements(); |
| boolean result; |
| |
| while(e.hasMoreElements()) { |
| result = ((FileSelector)e.nextElement()).isSelected(basedir, |
| filename,file); |
| if (result) { |
| yesvotes = yesvotes + 1; |
| } |
| else { |
| novotes = novotes + 1; |
| } |
| } |
| if (yesvotes > novotes) |
| { |
| return true; |
| } |
| else if (novotes > yesvotes) { |
| return false; |
| } |
| // At this point, we know we have a tie. |
| return allowtie; |
| } |
| } |
| |