| /* |
| * Copyright (c) 1997, 2021 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0, which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.glassfish.jaxb.runtime.v2.runtime.unmarshaller; |
| |
| import org.glassfish.jaxb.runtime.DatatypeConverterImpl; |
| import org.glassfish.jaxb.runtime.api.AccessorException; |
| import org.glassfish.jaxb.core.v2.WellKnownNamespace; |
| import org.glassfish.jaxb.runtime.v2.runtime.reflect.Accessor; |
| import jakarta.xml.bind.JAXBElement; |
| import org.xml.sax.SAXException; |
| |
| import javax.xml.namespace.QName; |
| import java.util.Collection; |
| |
| /** |
| * Looks for xsi:nil='true' and sets the target to null. |
| * Otherwise delegate to another handler. |
| * |
| * @author Kohsuke Kawaguchi |
| */ |
| public class XsiNilLoader extends ProxyLoader { |
| |
| private final Loader defaultLoader; |
| |
| public XsiNilLoader(Loader defaultLoader) { |
| this.defaultLoader = defaultLoader; |
| assert defaultLoader!=null; |
| } |
| |
| @Override |
| protected Loader selectLoader(UnmarshallingContext.State state, TagName ea) throws SAXException { |
| int idx = ea.atts.getIndex(WellKnownNamespace.XML_SCHEMA_INSTANCE,"nil"); |
| |
| if (idx!=-1) { |
| Boolean b = DatatypeConverterImpl._parseBoolean(ea.atts.getValue(idx)); |
| |
| if (b != null && b) { |
| onNil(state); |
| boolean hasOtherAttributes = (ea.atts.getLength() - 1) > 0; |
| // see issues 6759703 and 565 - need to preserve attributes even if the element is nil; only when the type is stored in JAXBElement |
| if (!(hasOtherAttributes && (state.getPrev().getTarget() instanceof JAXBElement))) { |
| return Discarder.INSTANCE; |
| } |
| } |
| } |
| return defaultLoader; |
| } |
| |
| @Override |
| public Collection<QName> getExpectedChildElements() { |
| return defaultLoader.getExpectedChildElements(); |
| } |
| |
| @Override |
| public Collection<QName> getExpectedAttributes() { |
| return defaultLoader.getExpectedAttributes(); |
| } |
| |
| /** |
| * Called when xsi:nil='true' was found. |
| */ |
| protected void onNil(UnmarshallingContext.State state) throws SAXException { |
| } |
| |
| public static final class Single extends XsiNilLoader { |
| private final Accessor acc; |
| public Single(Loader l, Accessor acc) { |
| super(l); |
| this.acc = acc; |
| } |
| |
| @Override |
| protected void onNil(UnmarshallingContext.State state) throws SAXException { |
| try { |
| acc.set(state.getPrev().getTarget(),null); |
| state.getPrev().setNil(true); |
| } catch (AccessorException e) { |
| handleGenericException(e,true); |
| } |
| } |
| |
| } |
| |
| public static final class Array extends XsiNilLoader { |
| public Array(Loader core) { |
| super(core); |
| } |
| |
| @Override |
| protected void onNil(UnmarshallingContext.State state) { |
| // let the receiver add this to the lister |
| state.setTarget(null); |
| } |
| } |
| } |