From e5b7380c874745c989d1816b8f552504f038e1bc Mon Sep 17 00:00:00 2001 From: lresende Date: Thu, 26 Sep 2013 20:33:20 +0000 Subject: 2.0 branch for possible maintenance release git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1526672 13f79535-47bb-0310-9956-ffa450edef68 --- .../ExtensibleStAXAttributeProcessor.java | 259 +++++++++++++++++++++ 1 file changed, 259 insertions(+) create mode 100644 sca-java-2.x/branches/2.0/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/ExtensibleStAXAttributeProcessor.java (limited to 'sca-java-2.x/branches/2.0/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/ExtensibleStAXAttributeProcessor.java') diff --git a/sca-java-2.x/branches/2.0/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/ExtensibleStAXAttributeProcessor.java b/sca-java-2.x/branches/2.0/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/ExtensibleStAXAttributeProcessor.java new file mode 100644 index 0000000000..5bf7e88779 --- /dev/null +++ b/sca-java-2.x/branches/2.0/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/ExtensibleStAXAttributeProcessor.java @@ -0,0 +1,259 @@ +/* + * 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.tuscany.sca.contribution.processor; + +import static javax.xml.XMLConstants.W3C_XML_SCHEMA_INSTANCE_NS_URI; + +import java.io.InputStream; +import java.io.OutputStream; +import java.util.logging.Level; +import java.util.logging.Logger; + +import javax.xml.namespace.QName; +import javax.xml.stream.Location; +import javax.xml.stream.XMLInputFactory; +import javax.xml.stream.XMLOutputFactory; +import javax.xml.stream.XMLStreamConstants; +import javax.xml.stream.XMLStreamException; +import javax.xml.stream.XMLStreamReader; +import javax.xml.stream.XMLStreamWriter; + +import org.apache.tuscany.sca.assembly.Extension; +import org.apache.tuscany.sca.contribution.resolver.ModelResolver; +import org.apache.tuscany.sca.monitor.Monitor; +import org.apache.tuscany.sca.monitor.Problem; +import org.apache.tuscany.sca.monitor.Problem.Severity; + +/** + * Implementation of an extensible StAX attribute processor. + * + * Takes a StAXAttributeProcessorExtensionPoint and delegates to the proper + * StAXAttributeProcessor by attribute QName + * + * @version $Rev$ $Date$ + */ +public class ExtensibleStAXAttributeProcessor implements StAXAttributeProcessor { + + private static final Logger logger = Logger.getLogger(ExtensibleStAXAttributeProcessor.class.getName()); + private static final String XMLSCHEMA_NS = "http://www.w3.org/2001/XMLSchema"; + public static final QName ANY_ATTRIBUTE = new QName(XMLSCHEMA_NS, "anyAttribute"); + + private XMLInputFactory inputFactory; + private XMLOutputFactory outputFactory; + private StAXAttributeProcessorExtensionPoint processors; + /** + * Constructs a new ExtensibleStAXArtifactProcessor. + * @param processors + * @param inputFactory + * @param outputFactory + */ + public ExtensibleStAXAttributeProcessor(StAXAttributeProcessorExtensionPoint processors, + XMLInputFactory inputFactory, + XMLOutputFactory outputFactory) { + super(); + this.processors = processors; + this.inputFactory = inputFactory; + this.outputFactory = outputFactory; + if (this.outputFactory != null) { + this.outputFactory.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, Boolean.TRUE); + } + } + + /** + * Report a warning. + * + * @param problems + * @param message + * @param model + */ + private void warning(Monitor monitor, String message, Object model, Object... messageParameters) { + if (monitor != null) { + Problem problem = + monitor.createProblem(this.getClass().getName(), + "contribution-validation-messages", + Severity.WARNING, + model, + message, + (Object[])messageParameters); + monitor.problem(problem); + } + } + + /** + * Report a error. + * + * @param problems + * @param message + * @param model + */ + private void error(Monitor monitor, String message, Object model, Object... messageParameters) { + if (monitor != null) { + Problem problem = + monitor.createProblem(this.getClass().getName(), + "contribution-validation-messages", + Severity.ERROR, + model, + message, + (Object[])messageParameters); + monitor.problem(problem); + } + } + + /** + * Report a exception. + * + * @param problems + * @param message + * @param model + */ + private void error(Monitor monitor, String message, Object model, Exception ex) { + if (monitor != null) { + Problem problem = + monitor.createProblem(this.getClass().getName(), + "contribution-validation-messages", + Severity.ERROR, + model, + message, + ex); + monitor.problem(problem); + } + } + + public Object read(QName attributeName, XMLStreamReader source, ProcessorContext context) throws ContributionReadException, + XMLStreamException { + // Delegate to the processor associated with the attribute QName + int event = source.getEventType(); + if (event == XMLStreamConstants.START_DOCUMENT) { + while (source.next() != XMLStreamReader.START_ELEMENT); + } + + StAXAttributeProcessor processor = null; + + //lookup for registered attribute processors + processor = (StAXAttributeProcessor)processors.getProcessor(attributeName); + if (processor == null) { + Location location = source.getLocation(); + // Skip xsi:type, xsi:nil and xsi:schemaLocation etc + if (!W3C_XML_SCHEMA_INSTANCE_NS_URI.equals(attributeName.getNamespaceURI())) { + if (logger.isLoggable(Level.WARNING)) { + logger.warning("Attribute " + attributeName + " cannot be processed. (" + location + ")"); + } + warning(context.getMonitor(), "AttributeCannotBeProcessed", processors, attributeName, location); + } + } else { + return processor.read(attributeName, source, context); + } + + //handle extension attributes without processors + processor = (StAXAttributeProcessor)processors.getProcessor(ANY_ATTRIBUTE); + if (processor == null) { + Location location = source.getLocation(); + if (logger.isLoggable(Level.WARNING)) { + logger.warning("Could not find Default Attribute processor !"); + } + warning(context.getMonitor(), "DefaultAttributeProcessorNotAvailable", processors, ANY_ATTRIBUTE, location); + } + + return processor == null ? null : processor.read(attributeName, source, context); + } + + @SuppressWarnings("unchecked") + public void write(Object model, XMLStreamWriter outputSource, ProcessorContext context) throws ContributionWriteException, XMLStreamException { + + if (model == null) { + return; + } + + // Delegate to the processor associated with the model type + StAXAttributeProcessor processor = processors.getProcessor(model.getClass()); + if (processor == null) { + if (!Extension.class.isInstance(model)) { + if (logger.isLoggable(Level.WARNING)) { + logger.warning("No StAX processor is configured to handle " + model.getClass()); + } + warning(context.getMonitor(), "NoStaxProcessor", processors, model.getClass()); + } + } else { + processor.write(model, outputSource, context); + return; + } + + //handle extension attributes without processors + processor = (StAXAttributeProcessor)processors.getProcessor(ANY_ATTRIBUTE); + if (processor == null) { + if (logger.isLoggable(Level.WARNING)) { + logger.warning("No Default StAX processor is configured to handle " + model.getClass()); + } + warning(context.getMonitor(), "NoDefaultStaxProcessor", processors, model.getClass()); + } else { + processor.write(model, outputSource, context); + return; + } + } + + @SuppressWarnings("unchecked") + public void resolve(Object model, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException { + + // Delegate to the processor associated with the model type + if (model != null) { + StAXAttributeProcessor processor = processors.getProcessor(model.getClass()); + if (processor != null) { + processor.resolve(model, resolver, context); + } + } + } + + /** + * Read a model from an InputStream. + * @param is The artifact InputStream + * @param type Model type + * @return The model + * @throws ContributionReadException + */ + public M read(InputStream is, Class type) throws ContributionReadException { + return null; + } + + /** + * Write a model to an OutputStream. + * @param model + * @param os + * @throws ContributionWriteException + */ + public void write(Object model, OutputStream os, ProcessorContext context) throws ContributionWriteException { + try { + XMLStreamWriter writer = outputFactory.createXMLStreamWriter(os); + write(model, writer, context); + writer.flush(); + writer.close(); + } catch (XMLStreamException e) { + ContributionWriteException cw = new ContributionWriteException(e); + error(context.getMonitor(), "ContributionWriteException", outputFactory, cw); + throw cw; + } + } + + public QName getArtifactType() { + return null; + } + + public Class getModelType() { + return Object.class; + } +} -- cgit v1.2.3