diff options
Diffstat (limited to 'sandbox/sebastien/java/dynamic/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringXMLComponentTypeLoader.java')
| -rw-r--r-- | sandbox/sebastien/java/dynamic/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringXMLComponentTypeLoader.java | 1153 |
1 files changed, 1153 insertions, 0 deletions
diff --git a/sandbox/sebastien/java/dynamic/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringXMLComponentTypeLoader.java b/sandbox/sebastien/java/dynamic/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringXMLComponentTypeLoader.java new file mode 100644 index 0000000000..bd3134c5f2 --- /dev/null +++ b/sandbox/sebastien/java/dynamic/modules/implementation-spring/src/main/java/org/apache/tuscany/sca/implementation/spring/introspect/SpringXMLComponentTypeLoader.java @@ -0,0 +1,1153 @@ +/* + * 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.implementation.spring.introspect; + +import static javax.xml.stream.XMLStreamConstants.END_ELEMENT; +import static javax.xml.stream.XMLStreamConstants.START_ELEMENT; + +import java.io.File; +import java.io.FileInputStream; +import java.io.IOException; +import java.net.MalformedURLException; +import java.net.URI; +import java.net.URL; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collection; +import java.util.Collections; +import java.util.Enumeration; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.jar.Attributes; +import java.util.jar.JarEntry; +import java.util.jar.JarFile; +import java.util.jar.Manifest; + +import javax.xml.namespace.QName; +import javax.xml.stream.XMLInputFactory; +import javax.xml.stream.XMLStreamException; +import javax.xml.stream.XMLStreamReader; + +import org.apache.tuscany.sca.assembly.AssemblyFactory; +import org.apache.tuscany.sca.assembly.ComponentType; +import org.apache.tuscany.sca.assembly.Multiplicity; +import org.apache.tuscany.sca.assembly.Property; +import org.apache.tuscany.sca.assembly.Reference; +import org.apache.tuscany.sca.assembly.Service; +import org.apache.tuscany.sca.assembly.xml.PolicySubjectProcessor; +import org.apache.tuscany.sca.contribution.Artifact; +import org.apache.tuscany.sca.contribution.ContributionFactory; +import org.apache.tuscany.sca.contribution.processor.ContributionReadException; +import org.apache.tuscany.sca.contribution.processor.ContributionResolveException; +import org.apache.tuscany.sca.contribution.processor.ProcessorContext; +import org.apache.tuscany.sca.contribution.resolver.ClassReference; +import org.apache.tuscany.sca.contribution.resolver.ModelResolver; +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.core.FactoryExtensionPoint; +import org.apache.tuscany.sca.implementation.java.JavaConstructorImpl; +import org.apache.tuscany.sca.implementation.java.JavaElementImpl; +import org.apache.tuscany.sca.implementation.java.JavaImplementation; +import org.apache.tuscany.sca.implementation.java.JavaParameterImpl; +import org.apache.tuscany.sca.implementation.spring.SpringBeanElement; +import org.apache.tuscany.sca.implementation.spring.SpringConstructorArgElement; +import org.apache.tuscany.sca.implementation.spring.SpringImplementation; +import org.apache.tuscany.sca.implementation.spring.SpringImplementationConstants; +import org.apache.tuscany.sca.implementation.spring.SpringPropertyElement; +import org.apache.tuscany.sca.implementation.spring.SpringSCAPropertyElement; +import org.apache.tuscany.sca.implementation.spring.SpringSCAReferenceElement; +import org.apache.tuscany.sca.implementation.spring.SpringSCAServiceElement; +import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException; +import org.apache.tuscany.sca.interfacedef.java.JavaInterface; +import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceContract; +import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory; +import org.apache.tuscany.sca.interfacedef.util.JavaXMLMapper; +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.policy.PolicyFactory; + +/** + * Introspects a Spring XML application-context configuration file to create <implementation-spring../> + * component type information. + * + * @version $Rev$ $Date$ + */ +public class SpringXMLComponentTypeLoader { + private ExtensionPointRegistry registry; + private XMLInputFactory xmlInputFactory; + private ContributionFactory contributionFactory; + private AssemblyFactory assemblyFactory; + private JavaInterfaceFactory javaFactory; + private PolicyFactory policyFactory; + private PolicySubjectProcessor policyProcessor; + private Monitor monitor; + private SpringBeanIntrospector beanIntrospector; + + public SpringXMLComponentTypeLoader(ExtensionPointRegistry registry, + Monitor monitor) { + super(); + this.registry = registry; + FactoryExtensionPoint factories = registry.getExtensionPoint(FactoryExtensionPoint.class); + this.assemblyFactory = factories.getFactory(AssemblyFactory.class); + this.javaFactory = factories.getFactory(JavaInterfaceFactory.class); + this.policyFactory = factories.getFactory(PolicyFactory.class); + this.policyProcessor = new PolicySubjectProcessor(policyFactory); + this.contributionFactory = factories.getFactory(ContributionFactory.class); + this.xmlInputFactory = factories.getFactory(XMLInputFactory.class); + this.monitor = monitor; + } + + /** + * Report a exception. + * + * @param problems + * @param message + * @param model + */ + private void error(String message, Object model, Exception ex) { + if (monitor != null) { + Problem problem = monitor.createProblem(this.getClass().getName(), "impl-spring-validation-messages", Severity.ERROR, model, message, ex); + monitor.problem(problem); + } + } + + /** + * Report a error. + * + * @param problems + * @param message + * @param model + */ + private void error(String message, Object model, Object... messageParameters) { + if (monitor != null) { + Problem problem = monitor.createProblem(this.getClass().getName(), "impl-spring-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters); + monitor.problem(problem); + } + } + + protected Class<SpringImplementation> getImplementationClass() { + return SpringImplementation.class; + } + + /** + * Base method which loads the component type from the application-context attached to the + * Spring implementation + * + */ + public void load(SpringImplementation implementation, ModelResolver resolver, ProcessorContext context) throws ContributionReadException { + //System.out.println("Spring TypeLoader - load method start"); + ComponentType componentType = implementation.getComponentType(); + /* Check that there is a component type object already set */ + if (componentType == null) { + throw new ContributionReadException("SpringXMLLoader load: implementation has no ComponentType object"); + } + if (componentType.isUnresolved()) { + /* Fetch the location of the application-context file from the implementation */ + loadFromXML(implementation, resolver, context); + if (!componentType.isUnresolved()) + implementation.setUnresolved(false); + } // end if + //System.out.println("Spring TypeLoader - load method complete"); + } // end method load + + private Class<?> resolveClass(ModelResolver resolver, String className, ProcessorContext context) throws ClassNotFoundException { + ClassReference classReference = new ClassReference(className); + classReference = resolver.resolveModel(ClassReference.class, classReference, context); + if (classReference.isUnresolved()) { + throw new ClassNotFoundException(className); + } + Class<?> javaClass = classReference.getJavaClass(); + return javaClass; + } + + /** + * Method which fills out the component type for a Spring implementation by reading the + * Spring application-context.xml file. + * + * @param implementation SpringImplementation into which to load the component type information + * @throws ContributionReadException Failed to read the contribution + */ + private void loadFromXML(SpringImplementation implementation, ModelResolver resolver, ProcessorContext context) throws ContributionReadException { + XMLStreamReader reader; + List<SpringBeanElement> beans = new ArrayList<SpringBeanElement>(); + List<SpringSCAServiceElement> services = new ArrayList<SpringSCAServiceElement>(); + List<SpringSCAReferenceElement> references = new ArrayList<SpringSCAReferenceElement>(); + List<SpringSCAPropertyElement> scaproperties = new ArrayList<SpringSCAPropertyElement>(); + + URL resource; + List<URL> contextResources = new ArrayList<URL>(); + String contextPath = implementation.getLocation(); + + try { + resource = resolveLocation(resolver, contextPath, context); + contextResources = getApplicationContextResource(resource); + + implementation.setClassLoader(new ContextClassLoader(resolver, context)); + implementation.setResource(contextResources); + // The URI is used to uniquely identify the Implementation + implementation.setURI(resource.toString()); + + for (URL contextResource : contextResources) { + List<SpringBeanElement> appCxtBeans = new ArrayList<SpringBeanElement>(); + List<SpringSCAServiceElement> appCxtServices = new ArrayList<SpringSCAServiceElement>(); + List<SpringSCAReferenceElement> appCxtReferences = new ArrayList<SpringSCAReferenceElement>(); + List<SpringSCAPropertyElement> appCxtProperties = new ArrayList<SpringSCAPropertyElement>(); + reader = xmlInputFactory.createXMLStreamReader(contextResource.openStream()); + // Read the beans, services, references and properties for individual application context + readContextDefinition(resolver, reader, contextPath, appCxtBeans, appCxtServices, appCxtReferences, appCxtProperties, context); + // Validate the beans from individual application context for uniqueness + validateBeans(appCxtBeans, appCxtServices, appCxtReferences, appCxtProperties); + // Add all the validated beans to the generic list + beans.addAll(appCxtBeans); + services.addAll(appCxtServices); + references.addAll(appCxtReferences); + scaproperties.addAll(appCxtProperties); + reader.close(); + } + } catch (IOException e) { + throw new ContributionReadException(e); + } catch (XMLStreamException e) { + throw new ContributionReadException(e); + } + + /* At this point, the complete application-context.xml file has been read and its contents */ + /* stored in the lists of beans, services, references. These are now used to generate */ + /* the implied componentType for the application context */ + generateComponentType(implementation, resolver, beans, services, references, scaproperties, context); + + return; + } // end method loadFromXML + + private URL resolveLocation(ModelResolver resolver, String contextPath, ProcessorContext context) throws MalformedURLException, + ContributionReadException { + URL resource = null; + URI uri = URI.create(contextPath); + if (!uri.isAbsolute()) { + Artifact artifact = contributionFactory.createArtifact(); + artifact.setUnresolved(true); + artifact.setURI(contextPath); + artifact = resolver.resolveModel(Artifact.class, artifact, context); + if (!artifact.isUnresolved()) { + resource = new URL(artifact.getLocation()); + } else { + throw new ContributionReadException("Location cannot be resloved: " + contextPath); + } + } else { + resource = new URL(contextPath); + } + return resource; + } + + /** + * Method which returns the XMLStreamReader for the Spring application-context.xml file + * specified in the location attribute + */ + private XMLStreamReader getApplicationContextReader(ModelResolver resolver, String location, ProcessorContext context) throws ContributionReadException { + + try { + URL resource = getApplicationContextResource(resolveLocation(resolver, location, context)).get(0); + XMLStreamReader reader = + xmlInputFactory.createXMLStreamReader(resource.openStream()); + return reader; + } catch (IOException e) { + throw new ContributionReadException(e); + } catch (XMLStreamException e) { + throw new ContributionReadException(e); + } + } + + /** + * Method which reads the spring context definitions from Spring application-context.xml + * file and identifies the defined beans, properties, services and references + * @param context + */ + private void readContextDefinition(ModelResolver resolver, + XMLStreamReader reader, + String contextPath, + List<SpringBeanElement> beans, + List<SpringSCAServiceElement> services, + List<SpringSCAReferenceElement> references, + List<SpringSCAPropertyElement> scaproperties, ProcessorContext context) throws ContributionReadException { + + SpringBeanElement bean = null; + + try { + boolean completed = false; + while (!completed) { + switch (reader.next()) { + case START_ELEMENT: + QName qname = reader.getName(); + //System.out.println("Spring TypeLoader - found element with name: " + qname.toString()); + if (SpringImplementationConstants.IMPORT_ELEMENT.equals(qname)) { + //FIXME - put the sequence of code below which gets the ireader into a subsidiary method + String location = reader.getAttributeValue(null, "resource"); + if (location != null) { + // FIXME - need to find a right way of generating this path + String resourcePath = contextPath.substring(0, contextPath.lastIndexOf("/")+1) + location; + XMLStreamReader ireader = getApplicationContextReader(resolver, resourcePath, context); + // Read the context definition for the identified imported resource + readContextDefinition(resolver, ireader, contextPath, beans, services, references, scaproperties, context); + } + } else if (SpringImplementationConstants.SCA_SERVICE_ELEMENT.equals(qname)) { + // The value of the @name attribute of an <sca:service/> subelement of a <beans/> + // element MUST be unique amongst the <sca:service/> subelements of the <beans/> element. + if (!services.isEmpty() && (services.contains(reader.getAttributeValue(null, "name")))) + error("ScaServiceNameNotUnique", resolver); + + SpringSCAServiceElement service = + new SpringSCAServiceElement(reader.getAttributeValue(null, "name"), + reader.getAttributeValue(null, "target")); + if (reader.getAttributeValue(null, "type") != null) + service.setType(reader.getAttributeValue(null, "type")); + policyProcessor.readPolicies(service, reader); + services.add(service); + } else if (SpringImplementationConstants.SCA_REFERENCE_ELEMENT.equals(qname)) { + // The value of the @name attribute of an <sca:reference/> subelement of a <beans/> + // element MUST be unique amongst the @name attributes of the <sca:reference/> subelements, + // of the <beans/> element. + if (!references.isEmpty() && (references.contains(reader.getAttributeValue(null, "name")))) + error("ScaReferenceNameNotUnique", resolver); + + SpringSCAReferenceElement reference = + new SpringSCAReferenceElement(reader.getAttributeValue(null, "name"), + reader.getAttributeValue(null, "type")); + if (reader.getAttributeValue(null, "default") != null) + reference.setDefaultBean(reader.getAttributeValue(null, "default")); + policyProcessor.readPolicies(reference, reader); + references.add(reference); + } else if (SpringImplementationConstants.SCA_PROPERTY_ELEMENT.equals(qname)) { + // The value of the @name attribute of an <sca:property/> subelement of a <beans/> + // element MUST be unique amongst the @name attributes of the <sca:property/> subelements, + // of the <beans/> element. + if (!scaproperties.isEmpty() && (scaproperties.contains(reader.getAttributeValue(null, "name")))) + error("ScaPropertyNameNotUnique", resolver); + + SpringSCAPropertyElement scaproperty = + new SpringSCAPropertyElement(reader.getAttributeValue(null, "name"), reader + .getAttributeValue(null, "type")); + scaproperties.add(scaproperty); + } else if (SpringImplementationConstants.BEAN_ELEMENT.equals(qname)) { + bean = new SpringBeanElement(reader.getAttributeValue(null, "id"), + reader.getAttributeValue(null, "class")); + if (reader.getAttributeValue(null, "abstract") != null) + if (reader.getAttributeValue(null, "abstract").equals("true")) + bean.setAbstractBean(true); + if (reader.getAttributeValue(null, "parent") != null) + if (!reader.getAttributeValue(null, "parent").equals("")) + bean.setParentAttribute(true); + if (reader.getAttributeValue(null, "factory-bean") != null) + if (!reader.getAttributeValue(null, "factory-bean").equals("")) + bean.setFactoryBeanAttribute(true); + if (reader.getAttributeValue(null, "factory-method") != null) + if (!reader.getAttributeValue(null, "factory-method").equals("")) + bean.setFactoryMethodAttribute(true); + // Set the first name as bean name, when the @id attribute is absent. + if (reader.getAttributeValue(null, "id") == null) { + if (reader.getAttributeValue(null, "name") != null) { + String[] names = (reader.getAttributeValue(null, "name")).split(","); + bean.setId(names[0]); + } + } + beans.add(bean); + // Read the <bean> element and its child elements + readBeanDefinition(reader, bean, beans); + } // end if + break; + case END_ELEMENT: + if (SpringImplementationConstants.BEANS_ELEMENT.equals(reader.getName())) { + //System.out.println("Spring TypeLoader - finished read of context file"); + completed = true; + break; + } // end if + } // end switch + } // end while + } catch (XMLStreamException e) { + throw new ContributionReadException(e); + } + } + + + /** + * Method which reads the bean definitions from Spring application-context.xml file and identifies + * the defined beans, properties, services and references + */ + private void readBeanDefinition(XMLStreamReader reader, + SpringBeanElement bean, + List<SpringBeanElement> beans) throws ContributionReadException { + + SpringBeanElement innerbean = null; + SpringPropertyElement property = null; + SpringConstructorArgElement constructorArg = null; + + try { + boolean completed = false; + while (!completed) { + switch (reader.next()) { + case START_ELEMENT: + QName qname = reader.getName(); + if (SpringImplementationConstants.BEAN_ELEMENT.equals(qname)) { + innerbean = new SpringBeanElement(reader.getAttributeValue(null, "id"), reader + .getAttributeValue(null, "class")); + // Set the first name as bean name, when the @id attribute is absent. + if (reader.getAttributeValue(null, "id") == null) { + if (reader.getAttributeValue(null, "name") != null) { + String[] names = (reader.getAttributeValue(null, "name")).split(","); + innerbean.setId(names[0]); + } + } + innerbean.setInnerBean(true); + beans.add(innerbean); + readBeanDefinition(reader, innerbean, beans); + } else if (SpringImplementationConstants.PROPERTY_ELEMENT.equals(qname)) { + property = new SpringPropertyElement(reader.getAttributeValue(null, "name")); + if (reader.getAttributeValue(null, "ref") != null) + property.addRef(reader.getAttributeValue(null, "ref")); + bean.addProperty(property); + } else if (SpringImplementationConstants.CONSTRUCTORARG_ELEMENT.equals(qname)) { + constructorArg = new SpringConstructorArgElement(reader.getAttributeValue(null, "type")); + if (reader.getAttributeValue(null, "ref") != null) + constructorArg.addRef(reader.getAttributeValue(null, "ref")); + if (reader.getAttributeValue(null, "index") != null) + constructorArg.setIndex((new Integer(reader.getAttributeValue(null, "index"))).intValue()); + if (reader.getAttributeValue(null, "value") != null) + constructorArg.addValue(reader.getAttributeValue(null, "value")); + bean.addCustructorArgs(constructorArg); + } else if (SpringImplementationConstants.REF_ELEMENT.equals(qname)) { + String ref = reader.getAttributeValue(null, "bean"); + // Check if the parent element is a property + if (property != null) property.addRef(ref); + // Check if the parent element is a constructor-arg + if (constructorArg != null) constructorArg.addRef(ref); + } else if (SpringImplementationConstants.VALUE_ELEMENT.equals(qname)) { + String value = reader.getElementText(); + // Check if the parent element is a constructor-arg + if (constructorArg != null) constructorArg.addValue(value); + } else if (SpringImplementationConstants.LIST_ELEMENT.equals(qname) || + SpringImplementationConstants.SET_ELEMENT.equals(qname) || + SpringImplementationConstants.MAP_ELEMENT.equals(qname)) { + if (property != null) + readCollections(reader, bean, beans, property, null); + if (constructorArg != null) + readCollections(reader, bean, beans, null, constructorArg); + } // end if + break; + case END_ELEMENT: + if (SpringImplementationConstants.BEAN_ELEMENT.equals(reader.getName())) { + completed = true; + break; + } else if (SpringImplementationConstants.PROPERTY_ELEMENT.equals(reader.getName())) { + property = null; + } else if (SpringImplementationConstants.CONSTRUCTORARG_ELEMENT.equals(reader.getName())) { + constructorArg = null; + } // end if + } // end switch + } // end while + } catch (XMLStreamException e) { + throw new ContributionReadException(e); + } + } + + + /** + * Method which reads the collection elements from Spring application-context.xml file and identifies + * the defined beans, list, maps and sets + */ + private void readCollections(XMLStreamReader reader, + SpringBeanElement bean, + List<SpringBeanElement> beans, + SpringPropertyElement property, + SpringConstructorArgElement constructorArg) throws ContributionReadException { + + SpringBeanElement innerbean = null; + + try { + boolean completed = false; + while (!completed) { + switch (reader.next()) { + case START_ELEMENT: + QName qname = reader.getName(); + if (SpringImplementationConstants.BEAN_ELEMENT.equals(qname)) { + innerbean = new SpringBeanElement(reader.getAttributeValue(null, "id"), reader + .getAttributeValue(null, "class")); + // Set the first name as bean name, when the @id attribute is absent. + if (reader.getAttributeValue(null, "id") == null) + if (reader.getAttributeValue(null, "name") != null) { + String[] names = (reader.getAttributeValue(null, "name")).split(","); + innerbean.setId(names[0]); + } + innerbean.setInnerBean(true); + beans.add(innerbean); + readBeanDefinition(reader, innerbean, beans); + } else if (SpringImplementationConstants.REF_ELEMENT.equals(qname)) { + String ref = reader.getAttributeValue(null, "bean"); + if (property != null) property.addRef(ref); + if (constructorArg != null) constructorArg.addRef(ref); + } else if (SpringImplementationConstants.LIST_ELEMENT.equals(qname) || + SpringImplementationConstants.SET_ELEMENT.equals(qname) || + SpringImplementationConstants.MAP_ELEMENT.equals(qname)) { + if (property != null) + readCollections(reader, innerbean, beans, property, null); + if (constructorArg != null) + readCollections(reader, innerbean, beans, null, constructorArg); + } else if (SpringImplementationConstants.ENTRY_ELEMENT.equals(qname)) { + String keyRef = reader.getAttributeValue(null, "key-ref"); + String valueRef = reader.getAttributeValue(null, "value-ref"); + if (property != null) {property.addRef(keyRef); property.addRef(valueRef);} + if (constructorArg != null) {constructorArg.addRef(keyRef); constructorArg.addRef(valueRef);} + } // end if + break; + case END_ELEMENT: + if (SpringImplementationConstants.LIST_ELEMENT.equals(reader.getName())) { + completed = true; + break; + } else if (SpringImplementationConstants.SET_ELEMENT.equals(reader.getName())) { + completed = true; + break; + } else if (SpringImplementationConstants.MAP_ELEMENT.equals(reader.getName())) { + completed = true; + break; + } // end if + } // end switch + } // end while + } catch (XMLStreamException e) { + throw new ContributionReadException(e); + } + } + + /** + * Generates the Spring implementation component type from the configuration contained in the + * lists of beans, services, references and scaproperties derived from the application context + */ + private void generateComponentType(SpringImplementation implementation, + ModelResolver resolver, + List<SpringBeanElement> beans, + List<SpringSCAServiceElement> services, + List<SpringSCAReferenceElement> references, + List<SpringSCAPropertyElement> scaproperties, + ProcessorContext context) throws ContributionReadException { + /* + * 1. Each sca:service becomes a service in the component type + * 2. Each sca:reference becomes a reference in the component type + * 3. Each sca:property becomes a property in the component type + * 4. IF there are no explicit service elements, each bean becomes a service + * 5. Each bean property which is a reference not pointing at another bean in the + * application context becomes a reference unless it is pointing at one of the references + * 6. Each bean property which is not a reference and which is not pointing + * at another bean in the application context becomes a property in the component type + */ + + JavaImplementation javaImplementation = null; + ComponentType componentType = implementation.getComponentType(); + + try { + // Deal with the services first.... + Iterator<SpringSCAServiceElement> its = services.iterator(); + while (its.hasNext()) { + SpringSCAServiceElement serviceElement = its.next(); + Class<?> interfaze = resolveClass(resolver, serviceElement.getType(), context); + Service theService = createService(interfaze, serviceElement.getName()); + // Spring allows duplication of bean definitions in multiple context scenario, + // in such cases, the latest bean definition overrides the older ones, hence + // we will remove any older definition and use the latest. + Service duplicate = null; + for (Service service : componentType.getServices()) { + if (service.getName().equals(theService.getName())) + duplicate = service; + } + if (duplicate != null) + componentType.getServices().remove(duplicate); + + componentType.getServices().add(theService); + // Add this service to the Service / Bean map + String beanName = serviceElement.getTarget(); + for (SpringBeanElement beanElement : beans) { + if (beanName.equals(beanElement.getId())) { + if (isvalidBeanForService(beanElement)) { + // add the required intents and policySets for the service + theService.getRequiredIntents().addAll(serviceElement.getRequiredIntents()); + theService.getPolicySets().addAll(serviceElement.getPolicySets()); + implementation.setBeanForService(theService, beanElement); + } + } + } // end for + } // end while + + // Next handle the references + Iterator<SpringSCAReferenceElement> itr = references.iterator(); + while (itr.hasNext()) { + SpringSCAReferenceElement referenceElement = itr.next(); + Class<?> interfaze = resolveClass(resolver, referenceElement.getType(), context); + Reference theReference = createReference(interfaze, referenceElement.getName()); + // Override the older bean definition with the latest ones + // for the duplicate definitions found. + Reference duplicate = null; + for (Reference reference : componentType.getReferences()) { + if (reference.getName().equals(theReference.getName())) + duplicate = reference; + } + if (duplicate != null) + componentType.getReferences().remove(duplicate); + + // add the required intents and policySets for this reference + theReference.getRequiredIntents().addAll(referenceElement.getRequiredIntents()); + theReference.getPolicySets().addAll(referenceElement.getPolicySets()); + componentType.getReferences().add(theReference); + } // end while + + // Next handle the properties + Iterator<SpringSCAPropertyElement> itsp = scaproperties.iterator(); + while (itsp.hasNext()) { + SpringSCAPropertyElement scaproperty = itsp.next(); + // Create a component type property if the SCA property element has a name + // and a type declared... + if (scaproperty.getType() != null && scaproperty.getName() != null) { + Property theProperty = assemblyFactory.createProperty(); + theProperty.setName(scaproperty.getName()); + // Get the Java class and then an XSD element type for the property + Class<?> propType = Class.forName(scaproperty.getType()); + theProperty.setXSDType(JavaXMLMapper.getXMLType(propType)); + // Override the older bean definition with the latest ones + // for the duplicate definitions found. + Property duplicate = null; + for (Property property : componentType.getProperties()) { + if (property.getName().equals(theProperty.getName())) + duplicate = property; + } + if (duplicate != null) + componentType.getProperties().remove(duplicate); + + componentType.getProperties().add(theProperty); + // Remember the Java Class (ie the type) for this property + implementation.setPropertyClass(theProperty.getName(), propType); + } // end if + } // end while + + // Finally deal with the beans + Iterator<SpringBeanElement> itb; + // If there are no explicit service elements, then expose all the beans + if (services.isEmpty()) { + itb = beans.iterator(); + // Loop through all the beans found + while (itb.hasNext()) { + SpringBeanElement beanElement = itb.next(); + // If its not a valid bean for service, ignore it + if (!isvalidBeanForService(beanElement)) continue; + // Load the Spring bean class + Class<?> beanClass = resolveClass(resolver, beanElement.getClassName(), context); + // Introspect the bean + beanIntrospector = + new SpringBeanIntrospector(registry, beanElement.getCustructorArgs()); + ComponentType beanComponentType = assemblyFactory.createComponentType(); + javaImplementation = beanIntrospector.introspectBean(beanClass, beanComponentType); + // Set the service name as bean name + for (Service componentService : beanComponentType.getServices()) + componentService.setName(beanElement.getId()); + // Get the service interface defined by this Spring Bean and add to + // the component type of the Spring Assembly + List<Service> beanServices = beanComponentType.getServices(); + componentType.getServices().addAll(beanServices); + // Add these services to the Service / Bean map + for (Service beanService : beanServices) { + implementation.setBeanForService(beanService, beanElement); + } + } // end while + } // end if + + itb = beans.iterator(); + while (itb.hasNext()) { + SpringBeanElement beanElement = itb.next(); + // Ignore if the bean has no properties and constructor arguments + if (beanElement.getProperties().isEmpty() && beanElement.getCustructorArgs().isEmpty()) + continue; + + Class<?> beanClass = resolveClass(resolver, beanElement.getClassName(), context); + // Introspect the bean + beanIntrospector = + new SpringBeanIntrospector(registry, beanElement.getCustructorArgs()); + ComponentType beanComponentType = assemblyFactory.createComponentType(); + javaImplementation = beanIntrospector.introspectBean(beanClass, beanComponentType); + Map<String, JavaElementImpl> propertyMap = javaImplementation.getPropertyMembers(); + JavaConstructorImpl constructor = javaImplementation.getConstructor(); + // Get the references by this Spring Bean and add the unresolved ones to + // the component type of the Spring Assembly + List<Reference> beanReferences = beanComponentType.getReferences(); + List<Property> beanProperties = beanComponentType.getProperties(); + + Iterator<SpringPropertyElement> itp = beanElement.getProperties().iterator(); + while (itp.hasNext()) { + SpringPropertyElement propertyElement = itp.next(); + for (String propertyRef : propertyElement.getRefs()) { + if (propertyRefUnresolved(propertyRef, beans, references, scaproperties)) { + // This means an unresolved reference from the spring bean... + for (Reference reference : beanReferences) { + if (propertyElement.getName().equals(reference.getName())) { + // The name of the reference in this case is the string in + // the @ref attribute of the Spring property element, NOT the + // name of the field in the Spring bean.... + reference.setName(propertyRef); + componentType.getReferences().add(reference); + } // end if + } // end for + + // Store the unresolved references as unresolvedBeanRef in the Spring Implementation type + for (Property scaproperty : beanProperties) { + if (propertyElement.getName().equals(scaproperty.getName())) { + // The name of the reference in this case is the string in + // the @ref attribute of the Spring property element, NOT the + // name of the field in the Spring bean.... + Class<?> interfaze = resolveClass(resolver, (propertyMap.get(propertyElement.getName()).getType()).getName(), context); + Reference theReference = createReference(interfaze, propertyRef); + implementation.setUnresolvedBeanRef(propertyRef, theReference); + } // end if + } // end for + } // end if + } // end for + } // end while + + Iterator<SpringConstructorArgElement> itcr = beanElement.getCustructorArgs().iterator(); + while (itcr.hasNext()) { + SpringConstructorArgElement conArgElement = itcr.next(); + for (String constructorArgRef : conArgElement.getRefs()) { + if (propertyRefUnresolved(constructorArgRef, beans, references, scaproperties)) { + for (JavaParameterImpl parameter : constructor.getParameters()) { + String paramType = parameter.getType().getName(); + Class<?> interfaze = resolveClass(resolver, paramType, context); + // Create a component type reference/property if the constructor-arg element has a + // type attribute OR index attribute declared... + if ((conArgElement.getType() != null && paramType.equals(conArgElement.getType())) || + (conArgElement.getIndex() != -1 && (conArgElement.getIndex() == parameter.getIndex()))) + { + if (parameter.getClassifer().getName().equals("org.osoa.sca.annotations.Reference")) { + Reference theReference = createReference(interfaze, constructorArgRef); + componentType.getReferences().add(theReference); + } + if (parameter.getClassifer().getName().equals("org.osoa.sca.annotations.Property")) { + // Store the unresolved references as unresolvedBeanRef in the Spring Implementation type + // we might need to verify with the component definition later. + Reference theReference = createReference(interfaze, constructorArgRef); + implementation.setUnresolvedBeanRef(constructorArgRef, theReference); + } + } + } // end for + } // end if + } // end for + } // end while + + } // end while + + } catch (ClassNotFoundException e) { + // Means that either an interface class, property class or a bean was not found + throw new ContributionReadException(e); + } catch (InvalidInterfaceException e) { + throw new ContributionReadException(e); + } catch (ContributionResolveException e) { + + } // end try + + // If we get here, the Spring assembly component type is resolved + componentType.setUnresolved(false); + implementation.setComponentType(componentType); + return; + } // end method generateComponentType + + /* + * Determines whether a reference attribute of a Spring property element is resolved either + * by a bean in the application context or by an SCA reference element or by an SCA property + * element + * @param ref - a String containing the name of the reference - may be null + * @param beans - a List of SpringBean elements + * @param references - a List of SCA reference elements + * @return true if the property is not resolved, false if it is resolved + */ + private boolean propertyRefUnresolved(String ref, + List<SpringBeanElement> beans, + List<SpringSCAReferenceElement> references, + List<SpringSCAPropertyElement> scaproperties) { + boolean unresolved = true; + + if (ref != null) { + // Scan over the beans looking for a match + Iterator<SpringBeanElement> itb = beans.iterator(); + while (itb.hasNext()) { + SpringBeanElement beanElement = itb.next(); + // Does the bean name match the ref? + if (ref.equals(beanElement.getId())) { + unresolved = false; + break; + } // end if + } // end while + // Scan over the SCA reference elements looking for a match + if (unresolved) { + Iterator<SpringSCAReferenceElement> itr = references.iterator(); + while (itr.hasNext()) { + SpringSCAReferenceElement referenceElement = itr.next(); + if (ref.equals(referenceElement.getName())) { + unresolved = false; + break; + } // end if + } // end while + } // end if + // Scan over the SCA property elements looking for a match + if (unresolved) { + Iterator<SpringSCAPropertyElement> itsp = scaproperties.iterator(); + while (itsp.hasNext()) { + SpringSCAPropertyElement propertyElement = itsp.next(); + if (ref.equals(propertyElement.getName())) { + unresolved = false; + break; + } // end if + } // end while + } // end if + } else { + // In the case where ref = null, the property is not going to be a reference of any + // kind and can be ignored + unresolved = false; + } // end if + + return unresolved; + + } // end method propertyRefUnresolved + + /** + * Validates whether the <sca:service>, <sca:reference> and <sca:property> elements + * has unique names within the application context. + */ + private void validateBeans(List<SpringBeanElement> beans, + List<SpringSCAServiceElement> services, + List<SpringSCAReferenceElement> references, + List<SpringSCAPropertyElement> scaproperties) throws ContributionReadException { + + // The @target attribute of a <service/> subelement of a <beans/> element + // MUST have the value of the @name attribute of one of the <bean/> + // subelements of the <beans/> element. + Iterator<SpringSCAServiceElement> its = services.iterator(); + while (its.hasNext()) { + SpringSCAServiceElement serviceElement = its.next(); + boolean targetBeanExists = false; + Iterator<SpringBeanElement> itb = beans.iterator(); + while (itb.hasNext()) { + SpringBeanElement beanElement = itb.next(); + if (serviceElement.getTarget().equals(beanElement.getId())) + targetBeanExists = true; + } + if (!targetBeanExists) + error("TargetBeanDoesNotExist", beans); + } // end while + + // The value of the @name attribute of an <sca:reference/> subelement of a <beans/> + // element MUST be unique amongst the @name attributes of the <sca:property/> + // subelements and the <bean/> subelements of the <beans/> element. + // AND + // The @default attribute of a <sca:reference/> subelement of a <beans/> + // element MUST have the value of the @name attribute of one of the <bean/> + // subelements of the <beans/> element. + Iterator<SpringSCAReferenceElement> itr = references.iterator(); + while (itr.hasNext()) { + SpringSCAReferenceElement referenceElement = itr.next(); + boolean defaultBeanExists = true; + boolean isUniqueReferenceName = true; + Iterator<SpringBeanElement> itb = beans.iterator(); + while (itb.hasNext()) { + SpringBeanElement beanElement = itb.next(); + if (referenceElement.getDefaultBean() != null) + if (referenceElement.getDefaultBean().equals(beanElement.getId())) + defaultBeanExists = false; + if (referenceElement.getName().equals(beanElement.getId())) + isUniqueReferenceName = false; + } + Iterator<SpringSCAPropertyElement> itp = scaproperties.iterator(); + while (itp.hasNext()) { + SpringSCAPropertyElement propertyElement = itp.next(); + if (referenceElement.getName().equals(propertyElement.getName())) + isUniqueReferenceName = false; + } + if (!defaultBeanExists) + error("DefaultBeanDoesNotExist", beans); + if (!isUniqueReferenceName) + error("ScaReferenceNameNotUnique", beans); + } // end while + + // The value of the @name attribute of an <sca:property/> subelement of a <beans/> + // element MUST be unique amongst the @name attributes of the <sca:reference/> + // subelements and the <bean/> subelements of the <beans/> element. + Iterator<SpringSCAPropertyElement> itp = scaproperties.iterator(); + while (itp.hasNext()) { + SpringSCAPropertyElement propertyElement = itp.next(); + boolean isUniquePropertyName = true; + Iterator<SpringBeanElement> itb = beans.iterator(); + while (itb.hasNext()) { + SpringBeanElement beanElement = itb.next(); + if (propertyElement.getName().equals(beanElement.getId())) + isUniquePropertyName = false; + } + Iterator<SpringSCAReferenceElement> itrp = references.iterator(); + while (itrp.hasNext()) { + SpringSCAReferenceElement referenceElement = itrp.next(); + if (propertyElement.getName().equals(referenceElement.getName())) + isUniquePropertyName = false; + } + if (!isUniquePropertyName) + error("ScaPropertyNameNotUnique", beans); + } // end while + } + + /** + * Validates whether a bean definition is valid for exposing as service. + */ + private boolean isvalidBeanForService(SpringBeanElement beanElement) { + + if (beanElement.isInnerBean()) + return false; + if (beanElement.hasParentAttribute()) + return false; + if (beanElement.hasFactoryMethodAttribute()) + return false; + if (beanElement.hasFactoryBeanAttribute()) + return false; + if (beanElement.getClassName() == null) + return false; + if (beanElement.getClassName().startsWith("org.springframework")) + return false; + // return true otherwise + return true; + } + + + /** + * Gets hold of the application-context.xml file as a Spring resource + * @param locationAttr - the location attribute from the <implementation.spring../> element + * @param cl - the ClassLoader for the Spring implementation + */ + protected List<URL> getApplicationContextResource(URL url) + throws ContributionReadException { + File manifestFile = null; + File appXmlFile; + File appXmlFolder; + File locationFile = null; + List<URL> appCtxResources = new ArrayList<URL>(); + + if (url != null) { + String path = url.getPath(); + locationFile = new File(path); + } else { + throw new ContributionReadException("SpringXMLComponentTypeLoader getApplicationContextResource: " + + "unable to find resource file " + url); + } + + if (locationFile.isDirectory()) { + try { + manifestFile = new File(locationFile, "META-INF"+ File.separator +"MANIFEST.MF"); + if (manifestFile.exists()) { + Manifest mf = new Manifest(new FileInputStream(manifestFile)); + Attributes mainAttrs = mf.getMainAttributes(); + String appCtxPath = mainAttrs.getValue("Spring-Context"); + if (appCtxPath != null) { + String[] cxtPaths = appCtxPath.split(";"); + for (String path : cxtPaths) { + appXmlFile = new File(locationFile, path.trim()); + if (appXmlFile.exists()) { + appCtxResources.add(appXmlFile.toURI().toURL()); + } + } + return appCtxResources; + } + } + // No MANIFEST.MF file OR no manifest-specified Spring context , then read all the + // xml files available in the META-INF/spring folder. + appXmlFolder = new File(locationFile, "META-INF" + File.separator + "spring"); + if (appXmlFolder.exists()) { + File[] files = appXmlFolder.listFiles(); + for (File appFile: files) { + if (appFile.getName().endsWith(".xml")) { + appCtxResources.add(appFile.toURI().toURL()); + } + } + return appCtxResources; + } + } catch (IOException e) { + throw new ContributionReadException("Error reading manifest " + manifestFile); + } + } else { + if (locationFile.isFile() && locationFile.getName().endsWith(".jar")) { + try { + JarFile jf = new JarFile(locationFile); + JarEntry je; + Manifest mf = jf.getManifest(); + if (mf != null) { + Attributes mainAttrs = mf.getMainAttributes(); + String appCtxPath = mainAttrs.getValue("Spring-Context"); + if (appCtxPath != null) { + String[] cxtPaths = appCtxPath.split(";"); + for (String path : cxtPaths) { + je = jf.getJarEntry(path.trim()); + if (je != null) + appCtxResources.add(new URL("jar:" + locationFile.toURI().toURL() + "!/" + appCtxPath)); + } + return appCtxResources; + } + } + // No MANIFEST.MF file OR no manifest-specified Spring context , then read all the + // .xml files available in the META-INF/spring folder. + Enumeration<JarEntry> entries = jf.entries(); + while (entries.hasMoreElements()) { + je = entries.nextElement(); + if (je.getName().startsWith("META-INF/spring/") && je.getName().endsWith(".xml")) { + appCtxResources.add(new URL("jar:" + locationFile.toURI().toURL() + "!/" + je.getName())); + } + } + return appCtxResources; + } catch (IOException e) { + // TODO: create a more appropriate exception type + throw new ContributionReadException("SpringXMLComponentTypeLoader getApplicationContextResource: " + + " IO exception reading context file.", e); + } + } + else { + if (locationFile.getName().endsWith(".xml")) { + appCtxResources.add(url); + return appCtxResources; + } + else { + // Deal with the directory inside a jar file, in case the contribution itself is a JAR file. + try { + if (locationFile.getPath().indexOf(".jar") > 0) { + String jarPath = url.getPath().substring(5, url.getPath().indexOf("!")); + JarFile jf = new JarFile(jarPath); + JarEntry je = jf.getJarEntry(url.getPath().substring(url.getPath().indexOf("!/")+2) + + "/" + "META-INF" + "/" + "MANIFEST.MF"); + if (je != null) { + Manifest mf = new Manifest(jf.getInputStream(je)); + Attributes mainAttrs = mf.getMainAttributes(); + String appCtxPath = mainAttrs.getValue("Spring-Context"); + if (appCtxPath != null) { + String[] cxtPaths = appCtxPath.split(";"); + for (String path : cxtPaths) { + je = jf.getJarEntry(url.getPath().substring(url.getPath().indexOf("!/")+2) + "/" + path.trim()); + if (je != null) { + appCtxResources.add(new URL("jar:" + url.getPath() + "/" + path.trim())); + } + } + return appCtxResources; + } + } + // No MANIFEST.MF file OR no manifest-specified Spring context , then read all the + // .xml files available in the META-INF/spring folder. + Enumeration<JarEntry> entries = jf.entries(); + while (entries.hasMoreElements()) { + je = entries.nextElement(); + if (je.getName().startsWith("META-INF/spring/") && je.getName().endsWith(".xml")) { + appCtxResources.add(new URL("jar:" + url.getPath() + "/" + je.getName())); + } + } + return appCtxResources; + } + } catch (IOException e) { + throw new ContributionReadException("Error reading manifest " + manifestFile); + } + } + } + } + + throw new ContributionReadException("SpringXMLComponentTypeLoader getApplicationContextResource: " + + "unable to read resource file " + url); + } // end method getApplicationContextResource + + /** + * Creates a Service for the component type based on its name and Java interface + */ + public Service createService(Class<?> interfaze, String name) throws InvalidInterfaceException { + Service service = assemblyFactory.createService(); + JavaInterfaceContract interfaceContract = javaFactory.createJavaInterfaceContract(); + service.setInterfaceContract(interfaceContract); + + // Set the name for the service + service.setName(name); + + // Set the call interface and, if present, the callback interface + JavaInterface callInterface = javaFactory.createJavaInterface(interfaze); + service.getInterfaceContract().setInterface(callInterface); + if (callInterface.getCallbackClass() != null) { + JavaInterface callbackInterface = javaFactory.createJavaInterface(callInterface.getCallbackClass()); + service.getInterfaceContract().setCallbackInterface(callbackInterface); + } + return service; + } // end method createService + + /** + * Creates a Reference for the component type based on its name and Java interface + */ + private org.apache.tuscany.sca.assembly.Reference createReference(Class<?> interfaze, String name) + throws InvalidInterfaceException { + org.apache.tuscany.sca.assembly.Reference reference = assemblyFactory.createReference(); + JavaInterfaceContract interfaceContract = javaFactory.createJavaInterfaceContract(); + reference.setInterfaceContract(interfaceContract); + + // Set the name of the reference to the supplied name and the multiplicity of the reference + // to 1..1 - for Spring implementations, this is the only multiplicity supported + reference.setName(name); + reference.setMultiplicity(Multiplicity.ONE_ONE); + + // Set the call interface and, if present, the callback interface + JavaInterface callInterface = javaFactory.createJavaInterface(interfaze); + reference.getInterfaceContract().setInterface(callInterface); + if (callInterface.getCallbackClass() != null) { + JavaInterface callbackInterface = javaFactory.createJavaInterface(callInterface.getCallbackClass()); + reference.getInterfaceContract().setCallbackInterface(callbackInterface); + } + + return reference; + } + + private class ContextClassLoader extends ClassLoader { + public ContextClassLoader(ModelResolver resolver, ProcessorContext context) { + super(); + this.resolver = resolver; + this.context = context; + } + + private ModelResolver resolver; + private ProcessorContext context; + + @Override + protected Class<?> findClass(String name) throws ClassNotFoundException { + return SpringXMLComponentTypeLoader.this.resolveClass(resolver, name, context); + } + + @Override + protected URL findResource(String name) { + try { + return resolveLocation(resolver, name, context); + } catch (Exception e) { + return null; + } + } + + @Override + protected Enumeration<URL> findResources(String name) throws IOException { + URL url = findResource(name); + if (url != null) { + return Collections.enumeration(Arrays.asList(url)); + } else { + Collection<URL> urls = Collections.emptyList(); + return Collections.enumeration(urls); + } + } + } +} // end class SpringXMLComponentTypeLoader
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