1 /* 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.xml.internal.bind.v2.runtime.unmarshaller; 27 28 import org.xml.sax.SAXException; 29 30 /** 31 * {@link Loader} that delegates the processing to another {@link Loader} 32 * at {@link #startElement(UnmarshallingContext.State, TagName)}. 33 * 34 * @author Kohsuke Kawaguchi 35 */ 36 public abstract class ProxyLoader extends Loader { 37 public ProxyLoader() { 38 super(false); 39 } 40 41 @Override 42 public final void startElement(UnmarshallingContext.State state, TagName ea) throws SAXException { 43 Loader loader = selectLoader(state,ea); 44 state.loader = loader; 45 loader.startElement(state,ea); 46 } 47 48 /** 49 * Picks the loader to delegate to. 50 * 51 * @return never null. 52 */ 53 protected abstract Loader selectLoader(UnmarshallingContext.State state, TagName ea) throws SAXException; 54 55 @Override 56 public final void leaveElement(UnmarshallingContext.State state, TagName ea) { 57 // this loader is used just to forward to another loader, 58 // so we should never get this event. 59 throw new IllegalStateException(); 60 } 61 }