/*
* 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 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.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.jar.Attributes;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.jar.Manifest;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.namespace.QName;
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.contribution.Artifact;
import org.apache.tuscany.sca.contribution.ContributionFactory;
import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
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.core.UtilityExtensionPoint;
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.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.implementation.spring.xml.SpringXMLBeanDefinitionLoader;
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.Intent;
import org.apache.tuscany.sca.policy.PolicyFactory;
import org.apache.tuscany.sca.policy.PolicySet;
/**
* Introspects a Spring XML application-context configuration file to create <implementation-spring../>
* component type information.
*
* @version $Rev$ $Date$
*/
public class SpringXMLComponentTypeLoader {
private final static Logger log = Logger.getLogger(SpringXMLComponentTypeLoader.class.getName());
private ExtensionPointRegistry registry;
private ContributionFactory contributionFactory;
private AssemblyFactory assemblyFactory;
private PolicyFactory policyFactory;
private JavaInterfaceFactory javaFactory;
private SpringBeanIntrospector beanIntrospector;
private SpringXMLBeanDefinitionLoader xmlBeanDefinitionLoader;
public SpringXMLComponentTypeLoader(ExtensionPointRegistry registry) {
super();
this.registry = registry;
FactoryExtensionPoint factories = registry.getExtensionPoint(FactoryExtensionPoint.class);
this.assemblyFactory = factories.getFactory(AssemblyFactory.class);
this.policyFactory = factories.getFactory(PolicyFactory.class);
this.javaFactory = factories.getFactory(JavaInterfaceFactory.class);
this.contributionFactory = factories.getFactory(ContributionFactory.class);
this.xmlBeanDefinitionLoader =
registry.getExtensionPoint(UtilityExtensionPoint.class).getUtility(SpringXMLBeanDefinitionLoader.class);
}
/**
* Report a error.
*
* @param problems
* @param message
* @param model
*/
private void error(Monitor monitor, 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);
}
}
/**
* Report a error.
*
* @param problems
* @param message
* @param model
*/
private void warning(Monitor monitor, String message, Object model, Object... messageParameters) {
if (monitor != null) {
Problem problem =
monitor.createProblem(this.getClass().getName(),
"impl-spring-validation-messages",
Severity.WARNING,
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 {
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());
List<SpringBeanElement> appCxtBeans = new ArrayList<SpringBeanElement>();
List<SpringSCAServiceElement> appCxtServices = new ArrayList<SpringSCAServiceElement>();
List<SpringSCAReferenceElement> appCxtReferences = new ArrayList<SpringSCAReferenceElement>();
List<SpringSCAPropertyElement> appCxtProperties = new ArrayList<SpringSCAPropertyElement>();
if (xmlBeanDefinitionLoader != null) {
xmlBeanDefinitionLoader.load(contextResources,
appCxtServices,
appCxtReferences,
appCxtProperties,
appCxtBeans,
context);
populatePolicies(appCxtServices, appCxtReferences);
}
// Validate the beans from individual application context for uniqueness
validateBeans(appCxtBeans, appCxtServices, appCxtReferences, appCxtProperties, context.getMonitor());
// Add all the validated beans to the generic list
beans.addAll(appCxtBeans);
services.addAll(appCxtServices);
references.addAll(appCxtReferences);
scaproperties.addAll(appCxtProperties);
} catch (Throwable 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
public void populatePolicies(List<SpringSCAServiceElement> appCxtServices,
List<SpringSCAReferenceElement> appCxtReferences) {
for (SpringSCAReferenceElement e : appCxtReferences) {
for (QName qn : e.getIntentNames()) {
Intent intent = policyFactory.createIntent();
intent.setName(qn);
e.getRequiredIntents().add(intent);
}
for (QName qn : e.getPolicySetNames()) {
PolicySet ps = policyFactory.createPolicySet();
ps.setName(qn);
e.getPolicySets().add(ps);
}
}
for (SpringSCAServiceElement e : appCxtServices) {
for (QName qn : e.getIntentNames()) {
Intent intent = policyFactory.createIntent();
intent.setName(qn);
e.getRequiredIntents().add(intent);
}
for (QName qn : e.getPolicySetNames()) {
PolicySet ps = policyFactory.createPolicySet();
ps.setName(qn);
e.getPolicySets().add(ps);
}
}
}
private URL resolveLocation(ModelResolver resolver, String contextPath, ProcessorContext context)
throws MalformedURLException, ContributionReadException {
URL resource = null;
URI uri = URI.create(contextPath);
if (!uri.isAbsolute()) {
Artifact parent = context.getArtifact();
if (parent != null && parent.getURI() != null) {
URI base = URI.create("/" + parent.getURI());
uri = base.resolve(uri);
// Remove the leading / to make artifact resolver happy
if (uri.toString().startsWith("/")) {
uri = URI.create(uri.toString().substring(1));
}
}
Artifact artifact = contributionFactory.createArtifact();
artifact.setUnresolved(true);
artifact.setURI(uri.toString());
artifact = resolver.resolveModel(Artifact.class, artifact, context);
if (!artifact.isUnresolved()) {
resource = new URL(artifact.getLocation());
} else {
// The resource can be out of scope of the contribution root
if (parent != null && parent.getLocation() != null) {
resource = new URL(new URL(parent.getLocation()), contextPath);
return resource;
}
throw new ContributionReadException("Location cannot be resloved: " + contextPath);
}
} else {
resource = new URL(contextPath);
}
return resource;
}
/**
* 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();
boolean found = false;
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);
found = true;
break;
}
}
} // end for
if (!found) {
// REVIEW: Adding a SpringBeanElement "proxy" so that the bean id can be used at runtime to look
// up the bean instance from the parent context
implementation.setBeanForService(theService,
new SpringBeanElement(serviceElement.getTarget(), null));
}
} // 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;
}
try {
// 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);
}
} catch (Throwable e) {
// [rfeng] FIXME: Some Spring beans have constructors that take pararemters injected by Spring and
// Tuscany is not happy with that during the introspection
log.log(Level.SEVERE, e.getMessage(), e);
}
} // end while
} // end if
itb = beans.iterator();
while (itb.hasNext()) {
SpringBeanElement beanElement = itb.next();
// If its not a valid bean for service, ignore it
if (!isValidBeanForService(beanElement)) {
continue;
}
// Ignore if the bean has no properties and constructor arguments
if (beanElement.getProperties().isEmpty() && beanElement.getCustructorArgs().isEmpty())
continue;
ComponentType beanComponentType = assemblyFactory.createComponentType();
try {
Class<?> beanClass = resolveClass(resolver, beanElement.getClassName(), context);
// Introspect the bean
beanIntrospector = new SpringBeanIntrospector(registry, beanElement.getCustructorArgs());
javaImplementation = beanIntrospector.introspectBean(beanClass, beanComponentType);
} catch (Exception e) {
// [rfeng] FIXME: Some Spring beans have constructors that take pararemters injected by Spring and
// Tuscany is not happy with that during the introspection
log.log(Level.SEVERE, e.getMessage(), e);
continue;
}
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();
Set<String> excludedNames = new HashSet<String>();
Iterator<SpringPropertyElement> itp = beanElement.getProperties().iterator();
while (itp.hasNext()) {
SpringPropertyElement propertyElement = itp.next();
// Exclude the reference that is also known as a spring property
excludedNames.add(propertyElement.getName());
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);
break;
} // 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);
break;
} // 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()))) {
// [rfeng] Commenting out the following code as the constructor parameter based SCA
// references are added already
/*
if (parameter.getClassifer() == org.oasisopen.sca.annotation.Reference.class) {
Reference theReference = createReference(interfaze, constructorArgRef);
componentType.getReferences().add(theReference);
}
*/
if (parameter.getClassifer() == org.oasisopen.sca.annotation.Property.class) {
// 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
// [rfeng] Add the remaining introspected references (w/ @Reference but without Spring property ref)
for (Reference ref : beanReferences) {
if (!excludedNames.contains(ref.getName()) && componentType.getReference(ref.getName()) == null) {
// Only add the ones that not listed by sca:reference
componentType.getReferences().add(ref);
}
}
} // 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);
} // 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,
Monitor monitor) 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) {
// REVIEW: [rfeng] The target bean can exist in the parent Spring application context which we don't know
// until runtime
warning(monitor, "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(monitor, "DefaultBeanDoesNotExist", beans);
if (!isUniqueReferenceName)
error(monitor, "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(monitor, "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