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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.extension.script;
import static org.osoa.sca.Constants.SCA_NS;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.apache.tuscany.spi.deployer.DeploymentContext;
import org.apache.tuscany.spi.extension.LoaderExtension;
import org.apache.tuscany.spi.loader.LoaderException;
import org.apache.tuscany.spi.loader.LoaderRegistry;
import org.apache.tuscany.spi.loader.LoaderUtil;
import org.apache.tuscany.spi.loader.MissingResourceException;
import org.apache.tuscany.spi.model.ModelObject;
import org.osoa.sca.annotations.Constructor;
import org.osoa.sca.annotations.Reference;
/**
* Loader for handling implementation.script elements. <p/>
* <code><implementation.script script="path/foo.py" [language="lang" class="myclass"]></code>
*/
public class ScriptImplementationLoader extends LoaderExtension<ScriptImplementation> {
private static final QName IMPLEMENTATION_SCRIPT = new QName(SCA_NS, "implementation.script");
@Constructor( {"registry"})
public ScriptImplementationLoader(@Reference LoaderRegistry registry) {
super(registry);
}
public QName getXMLType() {
return IMPLEMENTATION_SCRIPT;
}
public ScriptImplementation load(ModelObject mo, XMLStreamReader reader, DeploymentContext deploymentContext)
throws XMLStreamException, LoaderException {
String scriptName = reader.getAttributeValue(null, "script");
if (scriptName != null && scriptName.length() < 1) {
scriptName = null;
}
String scriptLanguage = reader.getAttributeValue(null, "language");
if (scriptLanguage == null || scriptLanguage.length() < 1) {
int i = scriptName.lastIndexOf('.');
if (i > 0) {
scriptLanguage = scriptName.substring(i + 1);
}
}
if (scriptLanguage == null || scriptLanguage.length() < 1) {
throw new LoaderException("unable to determine script language");
}
String scriptClassName = reader.getAttributeValue(null, "class");
String scriptSrc = null;
// String scriptSrc = reader.getElementText();
// if (scriptSrc != null && scriptSrc.length() < 1) {
// scriptSrc = null;
// }
if (scriptName == null && scriptSrc == null) {
throw new MissingResourceException("no 'script' attribute or inline script source");
}
if (scriptName != null && scriptSrc != null) {
throw new MissingResourceException("cannot use both 'script' attribute and inline script");
}
LoaderUtil.skipToEndElement(reader);
ClassLoader cl = deploymentContext.getClassLoader();
ScriptImplementation impl = new ScriptImplementation(scriptName, scriptSrc, scriptLanguage, scriptClassName, cl);
registry.loadComponentType(impl, deploymentContext);
return impl;
}
}
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