001 /***************************************************************************** 002 * Copyright (C) PicoContainer Organization. All rights reserved. * 003 * ------------------------------------------------------------------------- * 004 * The software in this package is published under the terms of the BSD * 005 * style license a copy of which has been included with this distribution in * 006 * the LICENSE.txt file. * 007 *****************************************************************************/ 008 009 package org.picocontainer.gems.constraints; 010 011 import org.picocontainer.ComponentAdapter; 012 import org.picocontainer.PicoVisitor; 013 014 /** 015 * Aggregates multiple constraints together using boolean OR logic. 016 * Constraints are short-circuited as in java. 017 * 018 * @author Nick Sieger 019 * @version 1.1 020 */ 021 public class Or extends AbstractConstraint { 022 private Constraint[] children; 023 024 public Or(Constraint c1, Constraint c2) { 025 children = new Constraint[2]; 026 children[0] = c1; 027 children[1] = c2; 028 } 029 030 public Or(Constraint c1, Constraint c2, Constraint c3) { 031 children = new Constraint[3]; 032 children[0] = c1; 033 children[1] = c2; 034 children[2] = c3; 035 } 036 037 public Or(Constraint[] cc) { 038 children = new Constraint[cc.length]; 039 System.arraycopy(cc, 0, children, 0, cc.length); 040 } 041 042 public boolean evaluate(ComponentAdapter adapter) { 043 for (int i = 0; i < children.length; i++) { 044 if (children[i].evaluate(adapter)) { 045 return true; 046 } 047 } 048 return false; 049 } 050 051 public void accept(PicoVisitor visitor) { 052 super.accept(visitor); 053 for (int i = 0; i < children.length; i++) { 054 children[i].accept(visitor); 055 } 056 } 057 }