| /* |
| * Copyright (c) 1998, 2020 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation from Oracle TopLink |
| package org.eclipse.persistence.oxm.record; |
| |
| import org.eclipse.persistence.internal.core.sessions.CoreAbstractSession; |
| import org.eclipse.persistence.internal.oxm.Constants; |
| import org.eclipse.persistence.internal.oxm.Root; |
| import org.eclipse.persistence.internal.oxm.StrBuffer; |
| import org.eclipse.persistence.internal.oxm.XMLUnmarshaller; |
| import org.eclipse.persistence.internal.oxm.mappings.Mapping; |
| import org.eclipse.persistence.internal.oxm.record.UnmarshalRecordImpl; |
| import org.xml.sax.Attributes; |
| import org.xml.sax.SAXException; |
| |
| /** |
| * Record for handling simple root elements that have a single text child node, |
| * and are being unmarshalled to a primitive wrapper object. The characters |
| * method will be used to gather the text to be converted. |
| */ |
| public class XMLRootRecord extends UnmarshalRecordImpl { |
| |
| private Class targetClass; |
| private StrBuffer characters; |
| private boolean shouldReadChars; |
| private int elementCount; |
| private XMLUnmarshaller unmarshaller; |
| |
| /** |
| * Default constructor. |
| */ |
| public XMLRootRecord(Class cls, XMLUnmarshaller unmarshaller) { |
| this.targetClass = cls; |
| this.unmarshaller = unmarshaller; |
| setSession((CoreAbstractSession) unmarshaller.getContext().getSession()); |
| } |
| |
| @Override |
| public void characters(char[] ch, int start, int length) throws SAXException { |
| if (characters == null) { |
| characters = new StrBuffer(); |
| } |
| |
| if (shouldReadChars) { |
| characters.append(ch, start, length); |
| } |
| } |
| |
| @Override |
| public void characters(CharSequence characters) throws SAXException { |
| if(null != characters) { |
| String string = characters.toString(); |
| characters(string.toCharArray(), 0, string.length()); |
| } |
| } |
| |
| @Override |
| public void endDocument() throws SAXException { |
| } |
| |
| @Override |
| public void endElement(String namespaceURI, String localName, String qName) throws SAXException { |
| // once the root element is closed (or any sub-elements for that matter) we don't |
| // want to process any more characters |
| shouldReadChars = false; |
| } |
| |
| /** |
| * Return a populated XMLRoot object. |
| */ |
| @Override |
| public Object getCurrentObject() { |
| Root xmlRoot = unmarshaller.createRoot(); |
| xmlRoot.setLocalName(getLocalName()); |
| xmlRoot.setNamespaceURI(getRootElementNamespaceUri()); |
| if(currentObject == null) { |
| // this assumes that since we're unmarshalling to a primitive wrapper, the root |
| // element has a single text node. if, however, the root element doesn't have |
| // a text node as a first child, we'll try converting null |
| String val = null; |
| if (characters != null) { |
| val = characters.toString(); |
| } |
| xmlRoot.setObject(session.getDatasourcePlatform().getConversionManager().convertObject(val, targetClass)); |
| } else { |
| xmlRoot.setObject(currentObject); |
| } |
| return xmlRoot; |
| } |
| |
| @Override |
| public void startDocument() throws SAXException { |
| characters = null; |
| elementCount = 0; |
| shouldReadChars = true; |
| } |
| |
| @Override |
| public void initializeRecord(Mapping selfRecordMapping) throws SAXException { |
| } |
| |
| @Override |
| public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException { |
| // set the root element's prefix qualified name and namespace prefix |
| if (getRootElementName() == null) { |
| setRootElementName(qName); |
| setLocalName(localName); |
| setRootElementNamespaceUri(namespaceURI); |
| } |
| if(Constants.EMPTY_STRING.equals(localName)) { |
| return; |
| } |
| elementCount++; |
| if (elementCount > 1) { |
| // we only want to process characters from the first text child; |
| // if a subelement occurs, we will stop |
| shouldReadChars = false; |
| } |
| } |
| |
| } |