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/*
* 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.service.impl;
import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.Composite;
import org.apache.tuscany.sca.contribution.Contribution;
import org.apache.tuscany.sca.contribution.ContributionExport;
import org.apache.tuscany.sca.contribution.ContributionFactory;
import org.apache.tuscany.sca.contribution.ContributionImport;
import org.apache.tuscany.sca.contribution.service.ContributionMetadataLoader;
import org.apache.tuscany.sca.contribution.service.ContributionMetadataLoaderException;
/**
* Loader that handles contribution metadata files
*
* @version $Rev: 515261 $ $Date: 2007-03-06 11:22:46 -0800 (Tue, 06 Mar 2007) $
*/
public class ContributionMetadataLoaderImpl implements ContributionMetadataLoader {
private static final String SCA10_NS = "http://www.osoa.org/xmlns/sca/1.0";
private static final String TARGET_NAMESPACE = "targetNamespace";
private static final QName CONTRIBUTION = new QName(SCA10_NS, "contribution");
private static final QName DEPLOYABLE = new QName(SCA10_NS, "deployable");
private static final QName IMPORT = new QName(SCA10_NS, "import");
private static final QName EXPORT = new QName(SCA10_NS, "export");
private final AssemblyFactory assemblyFactory;
private final ContributionFactory contributionFactory;
public ContributionMetadataLoaderImpl(AssemblyFactory assemblyFactory, ContributionFactory contributionFactory) {
super();
this.assemblyFactory = assemblyFactory;
this.contributionFactory = contributionFactory;
}
public QName getXMLType() {
return CONTRIBUTION;
}
public void load(Contribution contribution, XMLStreamReader reader) throws XMLStreamException, ContributionMetadataLoaderException {
String targetNameSpaceURI = null;
while (true) {
int event = reader.next();
switch (event) {
case START_ELEMENT:
QName element = reader.getName();
if (CONTRIBUTION.equals(element)) {
targetNameSpaceURI = reader.getAttributeValue(null, TARGET_NAMESPACE);
} else if (DEPLOYABLE.equals(element)) {
String name = reader.getAttributeValue(null, "composite");
if (name == null) {
throw new InvalidValueException("Attribute 'composite' is missing");
}
QName compositeName = null;
int index = name.indexOf(':');
if (index != -1) {
String prefix = name.substring(0, index);
String localPart = name.substring(index + 1);
String ns = reader.getNamespaceContext().getNamespaceURI(prefix);
if (ns == null) {
throw new InvalidValueException("Invalid prefix: " + prefix);
}
compositeName = new QName(targetNameSpaceURI, localPart, prefix);
} else {
String prefix = "";
String localPart = name;
compositeName = new QName(targetNameSpaceURI, localPart, prefix);
}
Composite composite = assemblyFactory.createComposite();
composite.setName(compositeName);
composite.setUnresolved(true);
contribution.getDeployables().add(composite);
} else if (IMPORT.equals(element)) {
String ns = reader.getAttributeValue(null, "namespace");
if (ns == null) {
throw new InvalidValueException("Attribute 'namespace' is missing");
}
String location = reader.getAttributeValue(null, "location");
ContributionImport contributionImport = this.contributionFactory.createContributionImport();
if (location != null) {
contributionImport.setLocation(location);
}
contributionImport.setNamespace(ns);
contribution.getImports().add(contributionImport);
} else if (EXPORT.equals(element)) {
String ns = reader.getAttributeValue(null, "namespace");
if (ns == null) {
throw new InvalidValueException("Attribute 'namespace' is missing");
}
ContributionExport contributionExport = this.contributionFactory.createContributionExport();
contributionExport.setNamespace(ns);
contribution.getExports().add(contributionExport);
}
break;
case XMLStreamConstants.END_ELEMENT:
if (CONTRIBUTION.equals(reader.getName())) {
return;
}
break;
}
}
}
}
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