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1 /* |
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2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package com.sun.xml.internal.bind.v2.runtime.unmarshaller; |
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27 |
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28 import org.xml.sax.SAXException; |
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29 |
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30 /** |
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31 * {@link Loader} that delegates the processing to another {@link Loader} |
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32 * at {@link #startElement(UnmarshallingContext.State, TagName)}. |
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33 * |
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34 * @author Kohsuke Kawaguchi |
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35 */ |
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36 public abstract class ProxyLoader extends Loader { |
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37 public ProxyLoader() { |
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38 super(false); |
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39 } |
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40 |
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41 @Override |
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42 public final void startElement(UnmarshallingContext.State state, TagName ea) throws SAXException { |
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43 Loader loader = selectLoader(state,ea); |
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44 state.loader = loader; |
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45 loader.startElement(state,ea); |
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46 } |
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47 |
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48 /** |
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49 * Picks the loader to delegate to. |
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50 * |
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51 * @return never null. |
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52 */ |
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53 protected abstract Loader selectLoader(UnmarshallingContext.State state, TagName ea) throws SAXException; |
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54 |
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55 @Override |
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56 public final void leaveElement(UnmarshallingContext.State state, TagName ea) { |
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57 // this loader is used just to forward to another loader, |
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58 // so we should never get this event. |
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59 throw new IllegalStateException(); |
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60 } |
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61 } |