| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.sling.jcr.contentparser.impl; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.ArrayDeque; |
| import java.util.Deque; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import javax.xml.parsers.ParserConfigurationException; |
| import javax.xml.parsers.SAXParser; |
| import javax.xml.parsers.SAXParserFactory; |
| |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.jackrabbit.util.ISO9075; |
| import org.apache.sling.jcr.contentparser.ContentHandler; |
| import org.apache.sling.jcr.contentparser.ContentParser; |
| import org.apache.sling.jcr.contentparser.ParseException; |
| import org.apache.sling.jcr.contentparser.ParserOptions; |
| import org.xml.sax.Attributes; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.SAXParseException; |
| import org.xml.sax.helpers.DefaultHandler; |
| |
| /** |
| * Parses JCR XML files that contains content fragments. |
| * Instance of this class is thread-safe. |
| */ |
| public final class JcrXmlContentParser implements ContentParser { |
| |
| private final ParserHelper helper; |
| private final SAXParserFactory saxParserFactory; |
| |
| public JcrXmlContentParser(ParserOptions options) { |
| this.helper = new ParserHelper(options); |
| saxParserFactory = SAXParserFactory.newInstance(); |
| saxParserFactory.setNamespaceAware(true); |
| } |
| |
| @Override |
| public void parse(ContentHandler handler, InputStream is) throws IOException, ParseException { |
| try { |
| XmlHandler xmlHandler = new XmlHandler(handler); |
| SAXParser parser = saxParserFactory.newSAXParser(); |
| parser.parse(is, xmlHandler); |
| if (xmlHandler.hasError()) { |
| throw xmlHandler.getError(); |
| } |
| } |
| catch (ParserConfigurationException | SAXException ex) { |
| throw new ParseException("Error parsing JCR XML content.", ex); |
| } |
| } |
| |
| /** |
| * Decodes element or attribute names. |
| * @param qname qname |
| * @return Decoded name |
| */ |
| static String decodeName(String qname) { |
| return ISO9075.decode(qname); |
| } |
| |
| /** |
| * Parses XML stream to Map. |
| */ |
| class XmlHandler extends DefaultHandler { |
| private final ContentHandler contentHandler; |
| private final Deque<String> paths = new ArrayDeque<>(); |
| private final Set<String> ignoredPaths = new HashSet<>(); |
| private SAXParseException error; |
| |
| public XmlHandler(ContentHandler contentHandler) { |
| this.contentHandler = contentHandler; |
| } |
| |
| public boolean hasError() { |
| return error != null; |
| } |
| |
| public SAXParseException getError() { |
| return error; |
| } |
| |
| @Override |
| public void startElement(String uri, String localName, String qName, Attributes attributes) |
| throws SAXException { |
| |
| String resourceName = decodeName(qName); |
| |
| // generate path for element |
| String path; |
| if (paths.isEmpty()) { |
| path = "/"; |
| } |
| else { |
| path = helper.concatenatePath(paths.peek(), resourceName); |
| if (helper.ignoreResource(resourceName)) { |
| ignoredPaths.add(path); |
| } |
| } |
| paths.push(path); |
| |
| // skip further processing if this path or a parent path is ignored |
| if (isIgnoredPath(path)) { |
| return; |
| } |
| |
| // get properties |
| Map<String,Object> properties = new HashMap<>(); |
| for (int i=0; i<attributes.getLength(); i++) { |
| String propertyName = helper.cleanupPropertyName(decodeName(attributes.getQName(i))); |
| if (!helper.ignoreProperty(propertyName)) { |
| Object value = JcrXmlValueConverter.parseValue(propertyName, attributes.getValue(i)); |
| if (value != null) { |
| properties.put(propertyName, value); |
| } |
| } |
| } |
| helper.ensureDefaultPrimaryType(properties); |
| contentHandler.resource(path, properties); |
| } |
| |
| private boolean isIgnoredPath(String path) { |
| if (StringUtils.isEmpty(path)) { |
| return false; |
| } |
| if (ignoredPaths.contains(path)) { |
| return true; |
| } |
| String parentPath = StringUtils.substringBeforeLast(path, "/"); |
| return isIgnoredPath(parentPath); |
| } |
| |
| @Override |
| public void endElement(String uri, String localName, String qName) throws SAXException { |
| paths.pop(); |
| } |
| |
| @Override |
| public void error(SAXParseException ex) throws SAXException { |
| this.error = ex; |
| } |
| |
| @Override |
| public void fatalError(SAXParseException ex) throws SAXException { |
| this.error = ex; |
| } |
| |
| } |
| |
| } |