| /* |
| * 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.ambari.server.stack; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.FileReader; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import javax.xml.XMLConstants; |
| import javax.xml.bind.JAXBContext; |
| import javax.xml.bind.JAXBException; |
| import javax.xml.bind.Unmarshaller; |
| import javax.xml.stream.XMLInputFactory; |
| import javax.xml.stream.XMLStreamException; |
| import javax.xml.stream.XMLStreamReader; |
| import javax.xml.transform.stream.StreamSource; |
| import javax.xml.validation.Schema; |
| import javax.xml.validation.SchemaFactory; |
| |
| import org.apache.ambari.server.state.stack.ConfigUpgradePack; |
| import org.apache.ambari.server.state.stack.ConfigurationXml; |
| import org.apache.ambari.server.state.stack.ExtensionMetainfoXml; |
| import org.apache.ambari.server.state.stack.RepositoryXml; |
| import org.apache.ambari.server.state.stack.ServiceMetainfoXml; |
| import org.apache.ambari.server.state.stack.StackMetainfoXml; |
| import org.apache.ambari.server.state.stack.UpgradePack; |
| import org.apache.commons.io.IOUtils; |
| import org.apache.commons.lang.exception.ExceptionUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.xml.sax.SAXException; |
| |
| /** |
| * Provides functionality to unmarshal stack definition files to their |
| * corresponding object representations. |
| */ |
| public class ModuleFileUnmarshaller { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(ModuleFileUnmarshaller.class); |
| |
| /** |
| * Map of class to JAXB context |
| */ |
| private static final Map<Class<?>, JAXBContext> jaxbContexts = new HashMap<>(); |
| private static final Map<String, Schema> jaxbSchemas = new HashMap<>(); |
| |
| |
| /** |
| * Unmarshal a file to it's corresponding object type. |
| * |
| * @param clz class of the object representation |
| * @param file file to unmarshal |
| * |
| * @return object representation of the specified file |
| * @throws JAXBException if unable to unmarshal the file |
| * @throws XMLStreamException |
| * @throws SAXException |
| * @throws FileNotFoundException |
| */ |
| public <T> T unmarshal(Class<T> clz, File file) throws JAXBException, IOException, XMLStreamException, SAXException { |
| return unmarshal(clz, file, false); |
| } |
| |
| /** |
| * Unmarshal a file to it's corresponding object type. |
| * |
| * @param clz class of the object representation |
| * @param file file to unmarshal |
| * @param logXsd log XSD information |
| * |
| * @return object representation of the specified file |
| * @throws JAXBException if unable to unmarshal the file |
| * @throws XMLStreamException |
| * @throws SAXException |
| * @throws FileNotFoundException |
| */ |
| public <T> T unmarshal(Class<T> clz, File file, boolean logXsd) throws JAXBException, IOException, XMLStreamException, SAXException { |
| Unmarshaller u = jaxbContexts.get(clz).createUnmarshaller(); |
| |
| XMLInputFactory xmlFactory = XMLInputFactory.newInstance(); |
| |
| FileReader reader = new FileReader(file); |
| XMLStreamReader xmlReader = xmlFactory.createXMLStreamReader(reader); |
| |
| xmlReader.nextTag(); |
| String xsdName = xmlReader.getAttributeValue(XMLConstants.W3C_XML_SCHEMA_INSTANCE_NS_URI, "noNamespaceSchemaLocation"); |
| |
| InputStream xsdStream = null; |
| |
| if (null != xsdName) { |
| if (logXsd) { |
| LOG.info("Processing " + file.getAbsolutePath() + " with " + xsdName); |
| } |
| if (jaxbSchemas.containsKey(xsdName)) { |
| u.setSchema(jaxbSchemas.get(xsdName)); |
| } else { |
| |
| xsdStream = clz.getClassLoader().getResourceAsStream(xsdName); |
| |
| if (null != xsdStream) { |
| SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); |
| Schema schema = factory.newSchema(new StreamSource(xsdStream)); |
| |
| u.setSchema(schema); |
| |
| jaxbSchemas.put(xsdName, schema); |
| } else if (logXsd) { |
| LOG.info("Schema '" + xsdName + "' for " + file.getAbsolutePath() + " was not found, ignoring"); |
| } |
| } |
| } else if (logXsd) { |
| LOG.info("NOT processing " + file.getAbsolutePath() + "; there is no XSD"); |
| } |
| |
| try { |
| return clz.cast(u.unmarshal(file)); |
| } catch (Exception unmarshalException) { |
| |
| Throwable cause = ExceptionUtils.getRootCause(unmarshalException); |
| |
| LOG.error("Cannot parse {}", file.getAbsolutePath()); |
| if (null != cause) { |
| LOG.error(cause.getMessage(), cause); |
| } |
| |
| throw unmarshalException; |
| } finally { |
| IOUtils.closeQuietly(xsdStream); |
| } |
| } |
| |
| // statically register the JAXB contexts |
| static { |
| try { |
| // three classes define the top-level element "metainfo", so we need 3 contexts for them |
| JAXBContext ctx = JAXBContext.newInstance(StackMetainfoXml.class, RepositoryXml.class, |
| ConfigurationXml.class, UpgradePack.class, ConfigUpgradePack.class); |
| |
| jaxbContexts.put(StackMetainfoXml.class, ctx); |
| jaxbContexts.put(RepositoryXml.class, ctx); |
| jaxbContexts.put(ConfigurationXml.class, ctx); |
| jaxbContexts.put(UpgradePack.class, ctx); |
| jaxbContexts.put(ConfigUpgradePack.class, ctx); |
| jaxbContexts.put(ServiceMetainfoXml.class, JAXBContext.newInstance(ServiceMetainfoXml.class)); |
| jaxbContexts.put(ExtensionMetainfoXml.class, JAXBContext.newInstance(ExtensionMetainfoXml.class)); |
| } catch (JAXBException e) { |
| throw new RuntimeException (e); |
| } |
| } |
| } |