aoqi@0: /*
aefimov@650:  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.bind.v2.runtime.unmarshaller;
aoqi@0: 
aoqi@0: import org.xml.sax.SAXException;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * Decorates another {@link Loader} by setting a default value.
aoqi@0:  *
aoqi@0:  * @author Kohsuke Kawaguchi
aoqi@0:  */
aoqi@0: public final class DefaultValueLoaderDecorator extends Loader {
aoqi@0:     private final Loader l;
aoqi@0:     private final String defaultValue;
aoqi@0: 
aoqi@0:     public DefaultValueLoaderDecorator(Loader l, String defaultValue) {
aoqi@0:         this.l = l;
aoqi@0:         this.defaultValue = defaultValue;
aoqi@0:     }
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public void startElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
aoqi@0:         // install the default value, but don't override the one given by the parent loader
aefimov@650:         if(state.getElementDefaultValue() == null)
aefimov@650:             state.setElementDefaultValue(defaultValue);
aoqi@0: 
aefimov@650:         state.setLoader(l);
aoqi@0:         l.startElement(state,ea);
aoqi@0:     }
aoqi@0: }