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org.apache.cxf.configuration.blueprint.AbstractBPBeanDefinitionParser Maven / Gradle / Ivy
/**
* 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.cxf.configuration.blueprint;
import java.io.StringReader;
import java.io.StringWriter;
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.Unmarshaller;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.apache.aries.blueprint.ComponentDefinitionRegistry;
import org.apache.aries.blueprint.ParserContext;
import org.apache.aries.blueprint.PassThroughMetadata;
import org.apache.aries.blueprint.mutable.MutableBeanMetadata;
import org.apache.aries.blueprint.mutable.MutableCollectionMetadata;
import org.apache.aries.blueprint.mutable.MutablePassThroughMetadata;
import org.apache.aries.blueprint.mutable.MutableRefMetadata;
import org.apache.aries.blueprint.mutable.MutableValueMetadata;
import org.apache.cxf.bus.blueprint.BlueprintBus;
import org.apache.cxf.common.jaxb.JAXBContextCache;
import org.apache.cxf.common.jaxb.JAXBContextCache.CachedContextAndSchemas;
import org.apache.cxf.common.util.PackageUtils;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.helpers.DOMUtils;
import org.apache.cxf.staxutils.StaxUtils;
import org.osgi.framework.Bundle;
import org.osgi.service.blueprint.reflect.BeanMetadata;
import org.osgi.service.blueprint.reflect.CollectionMetadata;
import org.osgi.service.blueprint.reflect.ComponentMetadata;
import org.osgi.service.blueprint.reflect.MapMetadata;
import org.osgi.service.blueprint.reflect.Metadata;
import org.osgi.service.blueprint.reflect.RefMetadata;
import org.osgi.service.blueprint.reflect.ValueMetadata;
public abstract class AbstractBPBeanDefinitionParser {
private static final String XMLNS_BLUEPRINT = "http://www.osgi.org/xmlns/blueprint/v1.0.0";
private static final String COMPONENT_ID = "component-id";
private JAXBContext jaxbContext;
private Set> jaxbClasses;
protected boolean hasBusProperty() {
return false;
}
public Metadata createValue(ParserContext context, QName qName) {
MutableBeanMetadata v = context.createMetadata(MutableBeanMetadata.class);
v.setRuntimeClass(QName.class);
v.addArgument(createValue(context, qName.getNamespaceURI()), null, 0);
v.addArgument(createValue(context, qName.getLocalPart()), null, 1);
return v;
}
protected Metadata parseListData(ParserContext context,
ComponentMetadata enclosingComponent,
Element element) {
MutableCollectionMetadata m
= (MutableCollectionMetadata) context.parseElement(CollectionMetadata.class,
enclosingComponent, element);
m.setCollectionClass(List.class);
return m;
}
protected Metadata parseMapData(ParserContext context,
ComponentMetadata enclosingComponent,
Element element) {
return context.parseElement(MapMetadata.class, enclosingComponent, element);
}
protected void setFirstChildAsProperty(Element element,
ParserContext ctx,
MutableBeanMetadata bean,
String propertyName) {
Element first = DOMUtils.getFirstElement(element);
if (first == null) {
throw new IllegalStateException(propertyName + " property must have child elements!");
}
String id;
if (first.getNamespaceURI().equals(XMLNS_BLUEPRINT)) {
String name = first.getLocalName();
if ("ref".equals(name)) {
id = first.getAttribute(COMPONENT_ID);
if (id == null) {
throw new IllegalStateException("[ elements must have a \"component-id\" attribute!");
}
bean.addProperty(propertyName, createRef(ctx, id));
} else {
//Rely on BP to handle these ones.
bean.addProperty(propertyName, ctx.parseElement(Metadata.class, bean, first));
}
} else {
bean.addProperty(propertyName, ctx.parseElement(Metadata.class, bean, first));
}
}
public QName parseQName(Element element, String t) {
String t1 = t;
String ns = null;
String pre = null;
String local = null;
if (t1.startsWith("{")) {
int i = t1.indexOf('}');
if (i == -1) {
throw new RuntimeException("Namespace bracket '{' must having a closing bracket '}'.");
}
ns = t1.substring(1, i);
t1 = t1.substring(i + 1);
}
int colIdx = t1.indexOf(':');
if (colIdx == -1) {
local = t1;
pre = "";
ns = DOMUtils.getNamespace(element, "");
} else {
pre = t1.substring(0, colIdx);
local = t1.substring(colIdx + 1);
ns = DOMUtils.getNamespace(element, pre);
}
return new QName(ns, local, pre);
}
protected boolean parseAttributes(Element element, ParserContext ctx, MutableBeanMetadata bean) {
NamedNodeMap atts = element.getAttributes();
boolean setBus = false;
for (int i = 0; i < atts.getLength(); i++) {
Attr node = (Attr) atts.item(i);
String val = node.getValue();
String pre = node.getPrefix();
String name = node.getLocalName();
String prefix = node.getPrefix();
// Don't process namespaces
if (isNamespace(name, prefix)) {
continue;
}
if ("createdFromAPI".equals(name) || "abstract".equals(name)) {
bean.setScope(BeanMetadata.SCOPE_PROTOTYPE);
} else {
if ("depends-on".equals(name)) {
bean.addDependsOn(val);
} else if ("name".equals(name)) {
processNameAttribute(element, ctx, bean, val);
} else if ("bus".equals(name)) {
processBusAttribute(element, ctx, bean, val);
} else if (!"id".equals(name) && isAttribute(pre, name)) {
mapAttribute(bean, element, name, val, ctx);
}
}
}
return setBus;
}
protected void processBusAttribute(Element element, ParserContext ctx,
MutableBeanMetadata bean, String val) {
if (this.hasBusProperty()) {
bean.addProperty("bus", getBusRef(ctx, val));
} else {
bean.addArgument(getBusRef(ctx, val), null, 0);
}
}
protected void processNameAttribute(Element element,
ParserContext ctx,
MutableBeanMetadata bean,
String val) {
//nothing
}
protected void mapAttribute(MutableBeanMetadata bean, Element e,
String name, String val, ParserContext context) {
mapToProperty(bean, name, val, context);
}
protected boolean isAttribute(String pre, String name) {
return !"xmlns".equals(name) && (pre == null || !pre.equals("xmlns"))
&& !"abstract".equals(name) && !"lazy-init".equals(name)
&& !"id".equals(name);
}
protected boolean isNamespace(String name, String prefix) {
return "xmlns".equals(prefix) || prefix == null && "xmlns".equals(name);
}
protected void mapElement(ParserContext ctx, MutableBeanMetadata bean, Element el, String name) {
}
protected void mapToProperty(MutableBeanMetadata bean,
String propertyName,
String val,
ParserContext context) {
if ("id".equals(propertyName)) {
return;
}
if (!StringUtils.isEmpty(val)) {
if (val.startsWith("#")) {
bean.addProperty(propertyName, createRef(context, val.substring(1)));
} else {
bean.addProperty(propertyName, createValue(context, val));
}
}
}
public static ValueMetadata createValue(ParserContext context, String value) {
MutableValueMetadata v = context.createMetadata(MutableValueMetadata.class);
v.setStringValue(value);
return v;
}
public static RefMetadata createRef(ParserContext context, String value) {
MutableRefMetadata r = context.createMetadata(MutableRefMetadata.class);
r.setComponentId(value);
return r;
}
public static PassThroughMetadata createPassThrough(ParserContext context, Object value) {
MutablePassThroughMetadata v = context.createMetadata(MutablePassThroughMetadata.class);
v.setObject(value);
return v;
}
public static MutableBeanMetadata createObjectOfClass(ParserContext context, String value) {
MutableBeanMetadata v = context.createMetadata(MutableBeanMetadata.class);
v.setClassName(value);
return v;
}
protected MutableBeanMetadata getBus(ParserContext context, String name) {
ComponentDefinitionRegistry cdr = context.getComponentDefinitionRegistry();
ComponentMetadata meta = cdr.getComponentDefinition("blueprintBundle");
Bundle blueprintBundle = null;
if (meta instanceof PassThroughMetadata) {
blueprintBundle = (Bundle) ((PassThroughMetadata) meta).getObject();
}
if (!cdr.containsComponentDefinition(InterceptorTypeConverter.class.getName())) {
MutablePassThroughMetadata md = context.createMetadata(MutablePassThroughMetadata.class);
md.setObject(new InterceptorTypeConverter());
md.setId(InterceptorTypeConverter.class.getName());
context.getComponentDefinitionRegistry().registerTypeConverter(md);
}
if (blueprintBundle != null && !cdr.containsComponentDefinition(name)) {
//Create a bus
MutableBeanMetadata bus = context.createMetadata(MutableBeanMetadata.class);
bus.setId(name);
bus.setRuntimeClass(BlueprintBus.class);
bus.addProperty("bundleContext", createRef(context, "blueprintBundleContext"));
bus.addProperty("blueprintContainer", createRef(context, "blueprintContainer"));
bus.setDestroyMethod("shutdown");
bus.setInitMethod("initialize");
context.getComponentDefinitionRegistry().registerComponentDefinition(bus);
return bus;
}
return (MutableBeanMetadata) cdr.getComponentDefinition(name);
}
protected RefMetadata getBusRef(ParserContext context, String name) {
if ("cxf".equals(name)) {
getBus(context, name);
}
return createRef(context, name);
}
protected void parseChildElements(Element element, ParserContext ctx, MutableBeanMetadata bean) {
Element el = DOMUtils.getFirstElement(element);
while (el != null) {
String name = el.getLocalName();
mapElement(ctx, bean, el, name);
el = DOMUtils.getNextElement(el);
}
}
protected void mapElementToJaxbProperty(ParserContext ctx,
MutableBeanMetadata bean, Element parent,
QName name,
String propertyName,
Class c) {
Element data = DOMUtils.getFirstChildWithName(parent, name);
if (data == null) {
return;
}
mapElementToJaxbProperty(ctx, bean, data, propertyName, c);
}
public static class JAXBBeanFactory {
final JAXBContext ctx;
final Class cls;
public JAXBBeanFactory(JAXBContext c, Class c2) {
ctx = c;
cls = c2;
}
public Object createJAXBBean(String v) {
XMLStreamReader reader = StaxUtils.createXMLStreamReader(new StringReader(v));
try {
Object o = ctx.createUnmarshaller().unmarshal(reader, cls);
if (o instanceof JAXBElement) {
JAXBElement el = (JAXBElement)o;
o = el.getValue();
}
return o;
} catch (JAXBException e) {
throw new RuntimeException(e);
} finally {
try {
reader.close();
} catch (XMLStreamException e) {
//ignore
}
}
}
}
protected void mapElementToJaxbProperty(ParserContext ctx,
MutableBeanMetadata bean,
Element data,
String propertyName,
Class c) {
try {
XMLStreamWriter xmlWriter = null;
try {
StringWriter writer = new StringWriter();
xmlWriter = StaxUtils.createXMLStreamWriter(writer);
StaxUtils.copy(data, xmlWriter);
xmlWriter.flush();
MutableBeanMetadata factory = ctx.createMetadata(MutableBeanMetadata.class);
factory.setClassName(c.getName());
factory.setFactoryComponent(createPassThrough(ctx, new JAXBBeanFactory(getContext(c), c)));
factory.setFactoryMethod("createJAXBBean");
factory.addArgument(createValue(ctx, writer.toString()), String.class.getName(), 0);
bean.addProperty(propertyName, factory);
} catch (Exception ex) {
Unmarshaller u = getContext(c).createUnmarshaller();
Object obj;
if (c != null) {
obj = u.unmarshal(data, c);
} else {
obj = u.unmarshal(data);
}
if (obj instanceof JAXBElement) {
JAXBElement el = (JAXBElement)obj;
obj = el.getValue();
}
if (obj != null) {
MutablePassThroughMetadata value = ctx.createMetadata(MutablePassThroughMetadata.class);
value.setObject(obj);
bean.addProperty(propertyName, value);
}
} finally {
StaxUtils.close(xmlWriter);
}
} catch (JAXBException e) {
throw new RuntimeException("Could not parse configuration.", e);
}
}
protected synchronized JAXBContext getContext(Class cls) {
if (jaxbContext == null || jaxbClasses == null || !jaxbClasses.contains(cls)) {
try {
Set]> tmp = new HashSet>();
if (jaxbClasses != null) {
tmp.addAll(jaxbClasses);
}
JAXBContextCache.addPackage(tmp, PackageUtils.getPackageName(cls),
cls == null
? getClass().getClassLoader()
: cls.getClassLoader());
if (cls != null) {
boolean hasOf = false;
for (Class c : tmp) {
if (c.getPackage() == cls.getPackage()
&& "ObjectFactory".equals(c.getSimpleName())) {
hasOf = true;
}
}
if (!hasOf) {
tmp.add(cls);
}
}
JAXBContextCache.scanPackages(tmp);
CachedContextAndSchemas ccs
= JAXBContextCache.getCachedContextAndSchemas(tmp, null, null, null, false);
jaxbClasses = ccs.getClasses();
jaxbContext = ccs.getContext();
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}
return jaxbContext;
}
}
