diff options
Diffstat (limited to 'java/sca/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/JAXBContextHelper.java')
| -rw-r--r-- | java/sca/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/JAXBContextHelper.java | 482 |
1 files changed, 0 insertions, 482 deletions
diff --git a/java/sca/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/JAXBContextHelper.java b/java/sca/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/JAXBContextHelper.java deleted file mode 100644 index c68456e733..0000000000 --- a/java/sca/modules/databinding-jaxb/src/main/java/org/apache/tuscany/sca/databinding/jaxb/JAXBContextHelper.java +++ /dev/null @@ -1,482 +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.sca.databinding.jaxb; - -import java.lang.reflect.GenericArrayType; -import java.lang.reflect.ParameterizedType; -import java.lang.reflect.Type; -import java.lang.reflect.TypeVariable; -import java.lang.reflect.WildcardType; -import java.util.ArrayList; -import java.util.HashSet; -import java.util.List; -import java.util.Set; - -import javax.xml.bind.JAXBContext; -import javax.xml.bind.JAXBElement; -import javax.xml.bind.JAXBException; -import javax.xml.bind.JAXBIntrospector; -import javax.xml.bind.Marshaller; -import javax.xml.bind.Unmarshaller; -import javax.xml.bind.annotation.XmlEnum; -import javax.xml.bind.annotation.XmlRootElement; -import javax.xml.bind.annotation.XmlSchema; -import javax.xml.bind.annotation.XmlSeeAlso; -import javax.xml.bind.annotation.XmlType; -import javax.xml.namespace.QName; - -import org.apache.tuscany.sca.core.ExtensionPointRegistry; -import org.apache.tuscany.sca.core.UtilityExtensionPoint; -import org.apache.tuscany.sca.databinding.SimpleTypeMapper; -import org.apache.tuscany.sca.databinding.TransformationContext; -import org.apache.tuscany.sca.databinding.TransformationException; -import org.apache.tuscany.sca.databinding.impl.SimpleTypeMapperImpl; -import org.apache.tuscany.sca.databinding.util.LRUCache; -import org.apache.tuscany.sca.interfacedef.DataType; -import org.apache.tuscany.sca.interfacedef.Interface; -import org.apache.tuscany.sca.interfacedef.Operation; -import org.apache.tuscany.sca.interfacedef.impl.DataTypeImpl; -import org.apache.tuscany.sca.interfacedef.java.JavaInterface; -import org.apache.tuscany.sca.interfacedef.util.WrapperInfo; -import org.apache.tuscany.sca.interfacedef.util.XMLType; - -/** - * - * @version $Rev$ $Date$ - */ -// FIXME: [rfeng] We probably should turn this into a pluggable system service -public final class JAXBContextHelper { - private final JAXBContextCache cache; - private final static SimpleTypeMapper SIMPLE_TYPE_MAPPER = new SimpleTypeMapperImpl(); - - public JAXBContextHelper(ExtensionPointRegistry registry) { - cache = new JAXBContextCache(registry); - } - - public static JAXBContextHelper getInstance(ExtensionPointRegistry registry) { - UtilityExtensionPoint utilityExtensionPoint = registry.getExtensionPoint(UtilityExtensionPoint.class); - return utilityExtensionPoint.getUtility(JAXBContextHelper.class); - } - - /** - * Create a JAXBContext for a given class - * @param cls - * @return - * @throws JAXBException - */ - public JAXBContext createJAXBContext(Class<?> cls) throws JAXBException { - return cache.getJAXBContext(cls); - } - - public JAXBContext createJAXBContext(TransformationContext tContext, boolean source) throws JAXBException { - if (tContext == null) - throw new TransformationException("JAXB context is not set for the transformation."); - - // TODO: [rfeng] Need to figure out what's the best granularity to create the JAXBContext - // per interface, operation or parameter - Operation op = source ? tContext.getSourceOperation() : tContext.getTargetOperation(); - if (op != null) { - synchronized (op) { - JAXBContext context = op.getInputType().getMetaData(JAXBContext.class); - if (context == null) { - context = createJAXBContext(getDataTypes(op, true)); - op.getInputType().setMetaData(JAXBContext.class, context); - } - return context; - } - } - - // For property transformation, the operation can be null - DataType<?> dataType = source ? tContext.getSourceDataType() : tContext.getTargetDataType(); - return createJAXBContext(dataType); - - } - - private static Class<?>[] getSeeAlso(Class<?> interfaze) { - if (interfaze == null) { - return null; - } - XmlSeeAlso seeAlso = interfaze.getAnnotation(XmlSeeAlso.class); - if (seeAlso == null) { - return null; - } else { - return seeAlso.value(); - } - } - - public JAXBContext createJAXBContext(DataType dataType) throws JAXBException { - return createJAXBContext(findClasses(dataType)); - } - - public Unmarshaller getUnmarshaller(JAXBContext context) throws JAXBException { - return cache.getUnmarshaller(context); - } - - public void releaseJAXBUnmarshaller(JAXBContext context, Unmarshaller unmarshaller) { - cache.releaseJAXBUnmarshaller(context, unmarshaller); - } - - public Marshaller getMarshaller(JAXBContext context) throws JAXBException { - return cache.getMarshaller(context); - } - - public void releaseJAXBMarshaller(JAXBContext context, Marshaller marshaller) { - cache.releaseJAXBMarshaller(context, marshaller); - } - - @SuppressWarnings("unchecked") - public static Object createJAXBElement(JAXBContext context, DataType dataType, Object value) { - Class<?> type = dataType == null ? value.getClass() : dataType.getPhysical(); - QName name = JAXBDataBinding.ROOT_ELEMENT; - if (context != null) { - Object logical = dataType == null ? null : dataType.getLogical(); - if (logical instanceof XMLType) { - XMLType xmlType = (XMLType)logical; - if (xmlType.isElement()) { - name = xmlType.getElementName(); - } else { - /** - * Set the declared type to Object.class so that xsi:type - * will be produced - */ - type = Object.class; - } - } else { - type = Object.class; - } - } - - JAXBIntrospector introspector = context.createJAXBIntrospector(); - Object element = null; - if (value != null && introspector.isElement(value)) { - // NOTE: [rfeng] We cannot wrap an element in a JAXBElement - element = value; - } - if (element == null) { - // For local elements, we still have to produce xsi:type - element = new JAXBElement(name, Object.class, value); - } - return element; - } - - @SuppressWarnings("unchecked") - public static Object createReturnValue(JAXBContext context, DataType dataType, Object value) { - Class<?> cls = getJavaType(dataType); - if (cls == JAXBElement.class) { - return createJAXBElement(context, dataType, value); - } else { - if (value instanceof JAXBElement) { - return ((JAXBElement)value).getValue(); - } else { - return value; - } - } - } - - /** - * Create a JAXContext for an array of classes - * @param classes - * @return - * @throws JAXBException - */ - public JAXBContext createJAXBContext(Class<?>[] classes) throws JAXBException { - return cache.getJAXBContext(classes); - } - - public JAXBContext createJAXBContext(Set<Class<?>> classes) throws JAXBException { - return cache.getJAXBContext(classes); - } - - /** - * Create a JAXBContext for a given java interface - * @param intf - * @return - * @throws JAXBException - */ - public JAXBContext createJAXBContext(Interface intf, boolean useWrapper) throws JAXBException { - synchronized (cache) { - LRUCache<Object, JAXBContext> map = cache.getCache(); - Integer key = new Integer(System.identityHashCode(intf)); - JAXBContext context = map.get(key); - if (context != null) { - return context; - } - List<DataType> dataTypes = getDataTypes(intf, useWrapper); - context = createJAXBContext(dataTypes); - map.put(key, context); - return context; - } - } - - public JAXBContext createJAXBContext(List<DataType> dataTypes) throws JAXBException { - JAXBContext context; - Set<Class<?>> classes = new HashSet<Class<?>>(); - Set<Type> visited = new HashSet<Type>(); - for (DataType d : dataTypes) { - findClasses(d, classes, visited); - } - - context = createJAXBContext(classes); - return context; - } - - private static Set<Class<?>> findClasses(DataType d) { - Set<Class<?>> classes = new HashSet<Class<?>>(); - Set<Type> visited = new HashSet<Type>(); - findClasses(d, classes, visited); - return classes; - } - - private static void findClasses(DataType d, Set<Class<?>> classes, Set<Type> visited) { - if (d == null) { - return; - } - String db = d.getDataBinding(); - if (JAXBDataBinding.NAME.equals(db) || (db != null && db.startsWith("java:")) || db == null) { - if (!d.getPhysical().isInterface() && !JAXBElement.class.isAssignableFrom(d.getPhysical())) { - classes.add(d.getPhysical()); - } - } - if (d.getPhysical() != d.getGenericType()) { - findClasses(d.getGenericType(), classes, visited); - } - } - - /** - * Find referenced classes in the generic type - * @param type - * @param classSet - * @param visited - */ - private static void findClasses(Type type, Set<Class<?>> classSet, Set<Type> visited) { - if (visited.contains(type) || type == null) { - return; - } - visited.add(type); - if (type instanceof Class) { - Class<?> cls = (Class<?>)type; - if (!cls.isInterface()) { - classSet.add(cls); - } - return; - } else if (type instanceof ParameterizedType) { - ParameterizedType pType = (ParameterizedType)type; - findClasses(pType.getRawType(), classSet, visited); - for (Type t : pType.getActualTypeArguments()) { - findClasses(t, classSet, visited); - } - } else if (type instanceof TypeVariable) { - TypeVariable<?> tv = (TypeVariable<?>)type; - for (Type t : tv.getBounds()) { - findClasses(t, classSet, visited); - } - } else if (type instanceof GenericArrayType) { - GenericArrayType gType = (GenericArrayType)type; - findClasses(gType.getGenericComponentType(), classSet, visited); - } else if (type instanceof WildcardType) { - WildcardType wType = (WildcardType)type; - for (Type t : wType.getLowerBounds()) { - findClasses(t, classSet, visited); - } - for (Type t : wType.getUpperBounds()) { - findClasses(t, classSet, visited); - } - } - } - - public JAXBContext createJAXBContext(Interface intf) throws JAXBException { - return createJAXBContext(intf, true); - } - - /** - * @param intf - * @param useWrapper Use wrapper classes? - * @return - */ - private static List<DataType> getDataTypes(Interface intf, boolean useWrapper) { - List<DataType> dataTypes = new ArrayList<DataType>(); - for (Operation op : intf.getOperations()) { - getDataTypes(dataTypes, op, useWrapper); - } - return dataTypes; - } - - private static List<DataType> getDataTypes(Operation op, boolean useWrapper) { - List<DataType> dataTypes = new ArrayList<DataType>(); - getDataTypes(dataTypes, op, useWrapper); - // Adding classes referenced by @XmlSeeAlso in the java interface - Interface interface1 = op.getInterface(); - if (interface1 instanceof JavaInterface) { - JavaInterface javaInterface = (JavaInterface)interface1; - Class<?>[] seeAlso = getSeeAlso(javaInterface.getJavaClass()); - if (seeAlso != null) { - for (Class<?> cls : seeAlso) { - dataTypes.add(new DataTypeImpl<XMLType>(JAXBDataBinding.NAME, cls, XMLType.UNKNOWN)); - } - } - seeAlso = getSeeAlso(javaInterface.getCallbackClass()); - if (seeAlso != null) { - for (Class<?> cls : seeAlso) { - dataTypes.add(new DataTypeImpl<XMLType>(JAXBDataBinding.NAME, cls, XMLType.UNKNOWN)); - } - } - } - return dataTypes; - } - - private static void getDataTypes(List<DataType> dataTypes, Operation op, boolean useWrapper) { - WrapperInfo wrapper = op.getWrapper(); - if (useWrapper && wrapper != null) { - DataType dt1 = wrapper.getInputWrapperType(); - if (dt1 != null) { - dataTypes.add(dt1); - } - DataType dt2 = wrapper.getOutputWrapperType(); - if (dt2 != null) { - dataTypes.add(dt2); - } - } - // FIXME: [rfeng] We may need to find the referenced classes in the child types - // else - { - for (DataType dt1 : op.getInputType().getLogical()) { - dataTypes.add(dt1); - } - DataType dt2 = op.getOutputType(); - if (dt2 != null) { - dataTypes.add(dt2); - } - } - for (DataType<DataType> dt3 : op.getFaultTypes()) { - DataType dt4 = dt3.getLogical(); - if (dt4 != null) { - dataTypes.add(dt4); - } - } - } - - public static Class<?> getJavaType(DataType<?> dataType) { - if (dataType == null) { - return null; - } - Class type = dataType.getPhysical(); - if (JAXBElement.class.isAssignableFrom(type)) { - Type generic = dataType.getGenericType(); - type = Object.class; - } - if (type == Object.class && dataType.getLogical() instanceof XMLType) { - XMLType xType = (XMLType)dataType.getLogical(); - Class javaType = SIMPLE_TYPE_MAPPER.getJavaType(xType.getTypeName()); - if (javaType != null) { - type = javaType; - } - } - return type; - } - - public static XMLType getXmlTypeName(Class<?> javaType) { - if (javaType.isInterface()) { - // JAXB doesn't support interfaces - return null; - } - String namespace = null; - String name = null; - Package pkg = javaType.getPackage(); - if (pkg != null) { - XmlSchema schema = pkg.getAnnotation(XmlSchema.class); - if (schema != null) { - namespace = schema.namespace(); - } - } - - QName elementQName = null; - QName typeQName = null; - XmlRootElement rootElement = javaType.getAnnotation(XmlRootElement.class); - if (rootElement != null) { - String elementName = rootElement.name(); - String elementNamespace = rootElement.namespace(); - if (elementNamespace.equals("##default")) { - elementNamespace = namespace; - } - if (elementName.equals("##default")) { - elementName = jaxbDecapitalize(javaType.getSimpleName()); - } - elementQName = new QName(elementNamespace, elementName); - } - XmlType type = javaType.getAnnotation(XmlType.class); - if (type != null) { - String typeNamespace = type.namespace(); - String typeName = type.name(); - - if (typeNamespace.equals("##default")) { - // namespace is from the package - typeNamespace = namespace; - } - - if (typeName.equals("##default")) { - typeName = jaxbDecapitalize(javaType.getSimpleName()); - } - typeQName = new QName(typeNamespace, typeName); - } else { - XmlEnum xmlEnum = javaType.getAnnotation(XmlEnum.class); - // POJO can have the @XmlSchema on the package-info too - if (xmlEnum != null || namespace != null) { - name = jaxbDecapitalize(javaType.getSimpleName()); - typeQName = new QName(namespace, name); - } - } - if (elementQName == null && typeQName == null) { - return null; - } - return new XMLType(elementQName, typeQName); - } - - /** - * The JAXB RI doesn't implement the decapitalization algorithm in the - * JAXB spec. See Sun bug 6505643 for details. This means that instead - * of calling java.beans.Introspector.decapitalize() as the JAXB spec says, - * Tuscany needs to mimic the incorrect JAXB RI algorithm. - */ - public static String jaxbDecapitalize(String name) { - // find first lower case char in name - int lower = name.length(); - for (int i = 0; i < name.length(); i++) { - if (Character.isLowerCase(name.charAt(i))) { - lower = i; - break; - } - } - - int decap; - if (name.length() == 0) { - decap = 0; // empty string: nothing to do - } else if (lower == 0) { - decap = 0; // first char is lower case: nothing to do - } else if (lower == 1) { - decap = 1; // one upper followed by lower: decapitalize 1 char - } else if (lower < name.length()) { - decap = lower - 1; // n uppers followed by at least one lower: decapitalize n-1 chars - } else { - decap = name.length(); // all upper case: decapitalize all chars - } - - return name.substring(0, decap).toLowerCase() + name.substring(decap); - } - -} |