1 /* 2 * Copyright (c) 1997, 2014, 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 * Decorates another {@link Loader} by setting a default value. 32 * 33 * @author Kohsuke Kawaguchi 34 */ 35 public final class DefaultValueLoaderDecorator extends Loader { 36 private final Loader l; 37 private final String defaultValue; 38 DefaultValueLoaderDecorator(Loader l, String defaultValue)39 public DefaultValueLoaderDecorator(Loader l, String defaultValue) { 40 this.l = l; 41 this.defaultValue = defaultValue; 42 } 43 44 @Override startElement(UnmarshallingContext.State state, TagName ea)45 public void startElement(UnmarshallingContext.State state, TagName ea) throws SAXException { 46 // install the default value, but don't override the one given by the parent loader 47 if(state.getElementDefaultValue() == null) 48 state.setElementDefaultValue(defaultValue); 49 50 state.setLoader(l); 51 l.startElement(state,ea); 52 } 53 } 54