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Diffstat (limited to 'tags/java/sca/1.5.1-RC4/modules/definitions-xml/src/main/java/org/apache/tuscany/sca/definitions/xml/SCADefinitionsDocumentProcessor.java')
| -rw-r--r-- | tags/java/sca/1.5.1-RC4/modules/definitions-xml/src/main/java/org/apache/tuscany/sca/definitions/xml/SCADefinitionsDocumentProcessor.java | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/tags/java/sca/1.5.1-RC4/modules/definitions-xml/src/main/java/org/apache/tuscany/sca/definitions/xml/SCADefinitionsDocumentProcessor.java b/tags/java/sca/1.5.1-RC4/modules/definitions-xml/src/main/java/org/apache/tuscany/sca/definitions/xml/SCADefinitionsDocumentProcessor.java new file mode 100644 index 0000000000..3c315cadcd --- /dev/null +++ b/tags/java/sca/1.5.1-RC4/modules/definitions-xml/src/main/java/org/apache/tuscany/sca/definitions/xml/SCADefinitionsDocumentProcessor.java @@ -0,0 +1,197 @@ +/* + * 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.definitions.xml; + +import java.io.IOException; +import java.io.InputStream; +import java.net.URI; +import java.net.URL; +import java.net.URLConnection; +import java.security.AccessController; +import java.security.PrivilegedActionException; +import java.security.PrivilegedExceptionAction; + +import javax.xml.namespace.QName; +import javax.xml.stream.XMLInputFactory; +import javax.xml.stream.XMLStreamConstants; +import javax.xml.stream.XMLStreamException; +import javax.xml.stream.XMLStreamReader; + +import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint; +import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor; +import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor; +import org.apache.tuscany.sca.contribution.resolver.ModelResolver; +import org.apache.tuscany.sca.contribution.service.ContributionReadException; +import org.apache.tuscany.sca.contribution.service.ContributionResolveException; +import org.apache.tuscany.sca.definitions.SCADefinitions; +import org.apache.tuscany.sca.definitions.impl.SCADefinitionsImpl; +import org.apache.tuscany.sca.definitions.util.SCADefinitionsUtil; +import org.apache.tuscany.sca.monitor.Monitor; +import org.apache.tuscany.sca.monitor.Problem; +import org.apache.tuscany.sca.monitor.Problem.Severity; +import org.apache.tuscany.sca.monitor.impl.ProblemImpl; + +/** + * A SCA Definitions Document processor. + * + * @version $Rev$ $Date$ + */ +public class SCADefinitionsDocumentProcessor implements URLArtifactProcessor<SCADefinitions> { + private StAXArtifactProcessor<Object> extensionProcessor; + private XMLInputFactory inputFactory; + private static final String TUSCANY_NS = "http://tuscany.apache.org/xmlns/sca/1.0"; + private static final String DEFINITIONS = "definitions"; + private static final QName DEFINITIONS_QNAME = new QName(TUSCANY_NS, DEFINITIONS); + private Monitor monitor; + + /** + * Construct a new SCADefinitions processor + * @param assemblyFactory + * @param policyFactory + * @param staxProcessor + */ + public SCADefinitionsDocumentProcessor(StAXArtifactProcessor<Object> staxProcessor, + XMLInputFactory inputFactory, + Monitor monitor) { + this.extensionProcessor = (StAXArtifactProcessor<Object>)staxProcessor; + this.inputFactory = inputFactory; + this.monitor = monitor; + } + + /** + * Constructs a new SCADefinitions processor. + * + * @param modelFactories + * @param staxProcessor + */ + public SCADefinitionsDocumentProcessor(ModelFactoryExtensionPoint modelFactories, + StAXArtifactProcessor<Object> staxProcessor, + Monitor monitor) { + this.extensionProcessor = (StAXArtifactProcessor<Object>)staxProcessor; + this.inputFactory = modelFactories.getFactory(XMLInputFactory.class); + this.monitor = monitor; + } + + /** + * Report a error. + * + * @param problems + * @param message + * @param model + */ + private void error(String message, Object model, Object... messageParameters) { + if (monitor != null) { + Problem problem = new ProblemImpl(this.getClass().getName(), "definitions-xml-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters); + monitor.problem(problem); + } + } + + /** + * Report a exception. + * + * @param problems + * @param message + * @param model + */ + private void error(String message, Object model, Exception ex) { + if (monitor != null) { + Problem problem = new ProblemImpl(this.getClass().getName(), "definitions-xml-validation-messages", Severity.ERROR, model, message, ex); + monitor.problem(problem); + } + } + + + public SCADefinitions read(URL contributionURL, final URI uri, final URL url) throws ContributionReadException { + InputStream urlStream = null; + try { + // Allow privileged access to open URL stream. Add FilePermission to added to security + // policy file. + try { + urlStream = AccessController.doPrivileged(new PrivilegedExceptionAction<InputStream>() { + public InputStream run() throws IOException { + URLConnection connection = url.openConnection(); + connection.setUseCaches(false); + return connection.getInputStream(); + } + }); + } catch (PrivilegedActionException e) { + error("PrivilegedActionException", url, (IOException)e.getException()); + throw (IOException)e.getException(); + } + + //urlStream = createInputStream(url); + XMLStreamReader reader = inputFactory.createXMLStreamReader(url.toString(), urlStream); + + SCADefinitions definitions = new SCADefinitionsImpl(); + QName name = null; + int event; + while ( reader.hasNext() ) { + event = reader.next(); + + if ( event == XMLStreamConstants.START_ELEMENT || + event == XMLStreamConstants.END_ELEMENT ) { + name = reader.getName(); + if ( name.equals(DEFINITIONS_QNAME) ) { + if ( event == XMLStreamConstants.END_ELEMENT ) { + return definitions; + } + } else { + SCADefinitions aDefn = (SCADefinitions)extensionProcessor.read(reader); + SCADefinitionsUtil.aggregateSCADefinitions(aDefn, definitions); + } + } + } + + return definitions; + } catch (XMLStreamException e) { + ContributionReadException ce = new ContributionReadException(e); + error("ContributionReadException", inputFactory, ce); + throw ce; + } catch (IOException e) { + ContributionReadException ce = new ContributionReadException(e); + error("ContributionReadException", inputFactory, ce); + throw ce; + } finally { + + try { + if (urlStream != null) { + urlStream.close(); + urlStream = null; + } + } catch (IOException ioe) { + //ignore + } + } + } + + public void resolve(SCADefinitions scaDefinitions, ModelResolver resolver) throws ContributionResolveException { + SCADefinitionsUtil.stripDuplicates(scaDefinitions); + extensionProcessor.resolve(scaDefinitions, resolver); + } + + public String getArtifactType() { + return "definitions.xml"; + } + + public Class<SCADefinitions> getModelType() { + return SCADefinitions.class; + } + +} |