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 */ 020 @SuppressWarnings("serial") 021 public final class Or extends AbstractConstraint { 022 private final Constraint[] children; 023 024 public Or(final Constraint c1, final Constraint c2) { 025 children = new Constraint[2]; 026 children[0] = c1; 027 children[1] = c2; 028 } 029 030 public Or(final Constraint c1, final Constraint c2, final Constraint c3) { 031 children = new Constraint[3]; 032 children[0] = c1; 033 children[1] = c2; 034 children[2] = c3; 035 } 036 037 public Or(final Constraint[] cc) { 038 children = new Constraint[cc.length]; 039 System.arraycopy(cc, 0, children, 0, cc.length); 040 } 041 042 @Override 043 public boolean evaluate(final ComponentAdapter adapter) { 044 for (Constraint aChildren : children) { 045 if (aChildren.evaluate(adapter)) { 046 return true; 047 } 048 } 049 return false; 050 } 051 052 @Override 053 public void accept(final PicoVisitor visitor) { 054 super.accept(visitor); 055 for (Constraint aChildren : children) { 056 aChildren.accept(visitor); 057 } 058 } 059 }