diff options
Diffstat (limited to 'sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/loader/ComponentLoader.java')
| -rw-r--r-- | sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/loader/ComponentLoader.java | 360 |
1 files changed, 0 insertions, 360 deletions
diff --git a/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/loader/ComponentLoader.java b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/loader/ComponentLoader.java deleted file mode 100644 index b289e74a9b..0000000000 --- a/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/loader/ComponentLoader.java +++ /dev/null @@ -1,360 +0,0 @@ -/* - * 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.core.loader; - -import static javax.xml.stream.XMLStreamConstants.END_ELEMENT; -import static javax.xml.stream.XMLStreamConstants.START_ELEMENT; -import static org.osoa.sca.Constants.SCA_NS; - -import java.lang.reflect.Type; -import java.net.URI; -import java.net.URISyntaxException; -import java.net.URL; -import java.util.ArrayList; -import java.util.List; -import java.util.Map; -import java.util.StringTokenizer; - -import javax.xml.namespace.QName; -import javax.xml.parsers.DocumentBuilder; -import javax.xml.parsers.DocumentBuilderFactory; -import javax.xml.parsers.ParserConfigurationException; -import javax.xml.stream.XMLStreamException; -import javax.xml.stream.XMLStreamReader; - -import org.apache.tuscany.core.binding.local.LocalBindingDefinition; -import org.apache.tuscany.core.deployer.ChildDeploymentContext; -import org.apache.tuscany.spi.ObjectFactory; -import org.apache.tuscany.spi.QualifiedName; -import org.apache.tuscany.spi.deployer.DeploymentContext; -import org.apache.tuscany.spi.extension.LoaderExtension; -import org.apache.tuscany.spi.loader.InvalidReferenceException; -import org.apache.tuscany.spi.loader.InvalidValueException; -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.MissingImplementationException; -import org.apache.tuscany.spi.loader.MissingReferenceException; -import org.apache.tuscany.spi.loader.MissingRequiredPropertyException; -import org.apache.tuscany.spi.loader.PropertyObjectFactory; -import org.apache.tuscany.spi.loader.ReferenceMultiplicityViolationException; -import org.apache.tuscany.spi.loader.UndefinedPropertyException; -import org.apache.tuscany.spi.loader.UndefinedReferenceException; -import org.apache.tuscany.spi.loader.UnrecognizedElementException; -import org.apache.tuscany.spi.model.BindingDefinition; -import org.apache.tuscany.spi.model.ComponentDefinition; -import org.apache.tuscany.spi.model.ComponentType; -import org.apache.tuscany.spi.model.CompositeComponentType; -import org.apache.tuscany.spi.model.Implementation; -import org.apache.tuscany.spi.model.ModelObject; -import org.apache.tuscany.spi.model.Multiplicity; -import org.apache.tuscany.spi.model.Property; -import org.apache.tuscany.spi.model.PropertyValue; -import org.apache.tuscany.spi.model.ReferenceDefinition; -import org.apache.tuscany.spi.model.ReferenceTarget; -import org.apache.tuscany.spi.model.ServiceDefinition; -import org.osoa.sca.annotations.Constructor; -import org.osoa.sca.annotations.Reference; -import org.w3c.dom.Document; - -/** - * Loads a component definition from an XML-based assembly file - * - * @version $Rev$ $Date$ - */ -public class ComponentLoader extends LoaderExtension<ComponentDefinition<?>> { - private static final QName COMPONENT = new QName(SCA_NS, "component"); - private static final QName PROPERTY = new QName(SCA_NS, "property"); - private static final QName REFERENCE = new QName(SCA_NS, "reference"); - - private static final String PROPERTY_FILE_ATTR = "file"; - private static final String PROPERTY_NAME_ATTR = "name"; - private static final String PROPERTY_SOURCE_ATTR = "source"; - - private PropertyObjectFactory propertyFactory; - - @Constructor - public ComponentLoader(@Reference LoaderRegistry registry, @Reference PropertyObjectFactory propertyFactory) { - super(registry); - this.propertyFactory = propertyFactory; - } - - public QName getXMLType() { - return COMPONENT; - } - - @SuppressWarnings("unchecked") - public ComponentDefinition<?> load(ModelObject object, XMLStreamReader reader, DeploymentContext context) - throws XMLStreamException, LoaderException { - assert COMPONENT.equals(reader.getName()); - String name = reader.getAttributeValue(null, "name"); - String initLevel = reader.getAttributeValue(null, "initLevel"); - String autowireAttr = reader.getAttributeValue(null, "autowire"); - boolean autowire; - if (autowireAttr == null) { - autowire = context.isAutowire(); - } else { - autowire = Boolean.parseBoolean(autowireAttr); - } - String runtimeAttr = reader.getAttributeValue(null, "runtimeId"); - URI runtimeId; - if (runtimeAttr != null) { - try { - runtimeId = new URI(runtimeAttr); - } catch (URISyntaxException e) { - throw new InvalidValueException(runtimeAttr, "runtimeId", e); - } - } else { - runtimeId = null; - } - - URI componentId = URI.create(context.getComponentId() + "/").resolve(name); - ClassLoader loader = context.getClassLoader(); - URL location = context.getScdlLocation(); - // xcv test - DeploymentContext childContext = new ChildDeploymentContext(context, loader, location, componentId, autowire); - Implementation<?> impl = loadImplementation(reader, childContext); - registry.loadComponentType(impl, childContext); - - ComponentDefinition<Implementation<?>> componentDefinition = - new ComponentDefinition<Implementation<?>>(componentId, impl); - componentDefinition.setAutowire(autowire); - componentDefinition.setRuntimeId(runtimeId); - if (initLevel != null) { - if (initLevel.length() == 0) { - componentDefinition.setInitLevel(0); - } else { - try { - componentDefinition.setInitLevel(Integer.valueOf(initLevel)); - } catch (NumberFormatException e) { - throw new InvalidValueException(initLevel, "initValue", e); - } - } - } - - while (true) { - switch (reader.next()) { - case START_ELEMENT: - QName qname = reader.getName(); - if (PROPERTY.equals(qname)) { - loadProperty(reader, componentDefinition, childContext); - } else if (REFERENCE.equals(qname)) { - loadReference(reader, componentDefinition, childContext); - } else { - throw new UnrecognizedElementException(qname); - } - reader.next(); - break; - case END_ELEMENT: - if (reader.getName().equals(COMPONENT)) { - populatePropertyValues(componentDefinition); - ComponentType<ServiceDefinition, ReferenceDefinition, Property<?>> type = - (ComponentType<ServiceDefinition, ReferenceDefinition, Property<?>>) componentDefinition - .getImplementation().getComponentType(); - - for (ReferenceDefinition ref : type.getReferences().values()) { - // add reference target definitions if autowire is enabled for references that are not - // explicitly configured with autowire by the component - if (!componentDefinition.getReferenceTargets().containsKey(ref.getUri().getFragment())) { - if (autowire) { - ReferenceTarget referenceTarget = new ReferenceTarget(); - String compName = componentDefinition.getUri().toString(); - URI refName = URI.create(compName + ref.getUri().toString()); - referenceTarget.setReferenceName(refName); - referenceTarget.setAutowire(autowire); - componentDefinition.add(referenceTarget); - } - } - } - validate(componentDefinition); - return componentDefinition; - } - break; - } - } - } - - protected Implementation<?> loadImplementation(XMLStreamReader reader, DeploymentContext context) - throws XMLStreamException, LoaderException { - reader.nextTag(); - ModelObject o = registry.load(null, reader, context); - if (!(o instanceof Implementation)) { - throw new MissingImplementationException(); - } - return (Implementation<?>) o; - } - - @SuppressWarnings("unchecked") - protected void loadProperty(XMLStreamReader reader, ComponentDefinition<?> definition, DeploymentContext context) - throws XMLStreamException, LoaderException { - String name = reader.getAttributeValue(null, PROPERTY_NAME_ATTR); - Implementation<?> implementation = definition.getImplementation(); - ComponentType<?, ?, ?> componentType = implementation.getComponentType(); - Property<Type> property = (Property<Type>) componentType.getProperties().get(name); - if (property == null) { - throw new UndefinedPropertyException(name); - } - PropertyValue<Type> propertyValue; - String source = reader.getAttributeValue(null, PROPERTY_SOURCE_ATTR); - String file = reader.getAttributeValue(null, PROPERTY_FILE_ATTR); - if (source != null || file != null) { - propertyValue = new PropertyValue<Type>(name, source, file); - propertyValue.setValue(property.getDefaultValue()); - LoaderUtil.skipToEndElement(reader); - } else { - try { - DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder(); - Document value = PropertyUtils.createPropertyValue(reader, property.getXmlType(), documentBuilder); - propertyValue = new PropertyValue<Type>(name, value); - } catch (ParserConfigurationException e) { - throw new LoaderException(e); - } - } - ObjectFactory<Type> objectFactory = propertyFactory.createObjectFactory(property, propertyValue); - propertyValue.setValueFactory(objectFactory); - definition.add(propertyValue); - } - - protected void loadReference(XMLStreamReader reader, - ComponentDefinition<?> componentDefinition, - DeploymentContext context) throws XMLStreamException, LoaderException { - String name = reader.getAttributeValue(null, "name"); - if (name == null) { - throw new InvalidReferenceException("No name specified"); - } - String target = reader.getAttributeValue(null, "target"); - boolean autowire = Boolean.parseBoolean(reader.getAttributeValue(null, "autowire")); - URI componentId = context.getComponentId(); - List<URI> uris = new ArrayList<URI>(); - if (target != null) { - StringTokenizer tokenizer = new StringTokenizer(target); - while (tokenizer.hasMoreTokens()) { - String token = tokenizer.nextToken(); - QualifiedName qName = new QualifiedName(token); - uris.add(componentId.resolve(qName.getFragment())); - } - } - - Implementation<?> impl = componentDefinition.getImplementation(); - ComponentType<?, ?, ?> componentType = impl.getComponentType(); - if (!componentType.getReferences().containsKey(name)) { - throw new UndefinedReferenceException(name); - } - if (componentType instanceof CompositeComponentType) { - if (uris.size() != 1) { - // FIXME not yet implemented - throw new UnsupportedOperationException(); - } - ReferenceDefinition definition = componentType.getReferences().get(name); - if (definition.getBindings().isEmpty()) { - // TODO JFM allow selection of a default binding - LocalBindingDefinition binding = new LocalBindingDefinition(uris.get(0)); - definition.addBinding(binding); - } else { - for (BindingDefinition binding : definition.getBindings()) { - binding.setTargetUri(uris.get(0)); - } - } - } else { - ReferenceTarget referenceTarget = componentDefinition.getReferenceTargets().get(name); - if (referenceTarget == null) { - referenceTarget = new ReferenceTarget(); - referenceTarget.setReferenceName(componentId.resolve('#' + name)); - referenceTarget.setAutowire(autowire); - componentDefinition.add(referenceTarget); - } - for (URI uri : uris) { - referenceTarget.addTarget(uri); - } - } - } - - @SuppressWarnings("unchecked") - protected void populatePropertyValues(ComponentDefinition<Implementation<?>> componentDefinition) - throws MissingRequiredPropertyException { - ComponentType componentType = componentDefinition.getImplementation().getComponentType(); - if (componentType != null) { - Map<String, Property<?>> properties = componentType.getProperties(); - Map<String, PropertyValue<?>> propertyValues = componentDefinition.getPropertyValues(); - - for (Property<?> aProperty : properties.values()) { - if (propertyValues.get(aProperty.getName()) == null) { - if (aProperty.isRequired()) { - throw new MissingRequiredPropertyException(aProperty.getName()); - } else if (aProperty.getDefaultValue() != null) { - PropertyValue propertyValue = new PropertyValue(); - propertyValue.setName(aProperty.getName()); - propertyValue.setValue(aProperty.getDefaultValue()); -// propertyValue.setValueFactory(new SimplePropertyObjectFactory(aProperty, -// propertyValue.getValue())); - propertyValues.put(aProperty.getName(), propertyValue); - } - } - } - } - } - - /** - * Validates a component definition, ensuring all component type configuration elements are satisfied - */ - protected void validate(ComponentDefinition<Implementation<?>> definition) throws LoaderException { - // validate refererences - Implementation<?> implementation = definition.getImplementation(); - ComponentType<?, ?, ?> type = implementation.getComponentType(); - if (type == null) { - return; - } - for (ReferenceDefinition referenceDef : type.getReferences().values()) { - if (!referenceDef.isRequired()) { - continue; - } - String name = referenceDef.getUri().getFragment(); - ReferenceTarget target = definition.getReferenceTargets().get(name); - if (target == null) { - throw new MissingReferenceException(name); - } - if (target.isAutowire()) { - // autowire targets are not set yet - continue; - } - int count = target.getTargets().size(); - Multiplicity multiplicity = referenceDef.getMultiplicity(); - switch (multiplicity) { - case ZERO_N: - break; - case ZERO_ONE: - if (count > 1) { - throw new ReferenceMultiplicityViolationException(name, multiplicity, count); - } - break; - case ONE_ONE: - if (count != 1) { - throw new ReferenceMultiplicityViolationException(name, multiplicity, count); - } - break; - case ONE_N: - if (count < 1) { - throw new ReferenceMultiplicityViolationException(name, multiplicity, count); - } - break; - } - - } - } -} |