001/* 002 * The contents of this file are subject to the terms of the Common Development and 003 * Distribution License (the License). You may not use this file except in compliance with the 004 * License. 005 * 006 * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the 007 * specific language governing permission and limitations under the License. 008 * 009 * When distributing Covered Software, include this CDDL Header Notice in each file and include 010 * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL 011 * Header, with the fields enclosed by brackets [] replaced by your own identifying 012 * information: "Portions Copyright [year] [name of copyright owner]". 013 * 014 * Copyright 2010–2011 ApexIdentity Inc. 015 * Portions Copyright 2011-2014 ForgeRock AS. 016 */ 017 018package org.forgerock.openig.resolver; 019 020import java.util.List; 021 022import org.forgerock.openig.util.UnmodifiableCollection; 023 024/** 025 * Resolves {@link List} objects. 026 */ 027@SuppressWarnings("rawtypes") 028public class ListResolver implements Resolver { 029 030 @Override 031 public Class<?> getKey() { 032 return List.class; 033 } 034 035 @Override 036 public Object get(Object object, Object element) { 037 if (object instanceof List && element instanceof Number) { 038 try { 039 return ((List) object).get(((Number) element).intValue()); 040 } catch (IndexOutOfBoundsException ioobe) { 041 // cannot resolve index 042 } 043 } 044 return Resolver.UNRESOLVED; 045 } 046 047 @SuppressWarnings("unchecked") 048 @Override 049 public Object put(Object object, Object element, Object value) { 050 if (object instanceof List && !(object instanceof UnmodifiableCollection) 051 && element instanceof Number) { 052 List list = (List) object; 053 int index = ((Number) element).intValue(); 054 try { 055 if (list.size() > index) { 056 // within existing list 057 list.set(index, value); 058 } else if (list.size() == index) { 059 // appending to end of list 060 list.add(element); 061 } 062 // otherwise, ignore out-of-range index 063 } catch (UnsupportedOperationException uoe) { 064 // ignore failed attempts to write to read-only list 065 } 066 } 067 return Resolver.UNRESOLVED; 068 } 069}