| /* |
| * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.xml.internal.bind.v2.runtime.reflect; |
| |
| import com.sun.xml.internal.bind.api.AccessorException; |
| |
| /** |
| * {@link Accessor} wrapper that replaces a null with an empty collection. |
| * |
| * <p> |
| * This is so that JAX-WS property accessor will work like an ordinary getter. |
| * |
| * |
| * @author Kohsuke Kawaguchi |
| */ |
| public class NullSafeAccessor<B,V,P> extends Accessor<B,V> { |
| private final Accessor<B,V> core; |
| private final Lister<B,V,?,P> lister; |
| |
| public NullSafeAccessor(Accessor<B,V> core, Lister<B,V,?,P> lister) { |
| super(core.getValueType()); |
| this.core = core; |
| this.lister = lister; |
| } |
| |
| public V get(B bean) throws AccessorException { |
| V v = core.get(bean); |
| if(v==null) { |
| // creates a new object |
| P pack = lister.startPacking(bean,core); |
| lister.endPacking(pack,bean,core); |
| v = core.get(bean); |
| } |
| return v; |
| } |
| |
| public void set(B bean, V value) throws AccessorException { |
| core.set(bean,value); |
| } |
| } |