OSGI expose An "ClassNotFoundException: org.w3c.dom.***" Error when release - osgi

Question

I only wrote the following codes in Activator.start() function
public void start(BundleContext bundleContext) throws Exception {
Activator.context = bundleContext;
Node node = new Node() {
#Override
public Object setUserData(String arg0, Object arg1, UserDataHandler arg2) {
// TODO Auto-generated method stub
return null;
}
#Override
public void setTextContent(String arg0) throws DOMException {
// TODO Auto-generated method stub
}
#Override
public void setPrefix(String arg0) throws DOMException {
// TODO Auto-generated method stub
}
#Override
public void setNodeValue(String arg0) throws DOMException {
// TODO Auto-generated method stub
}
#Override
public Node replaceChild(Node arg0, Node arg1) throws DOMException {
// TODO Auto-generated method stub
return null;
}
#Override
public Node removeChild(Node arg0) throws DOMException {
// TODO Auto-generated method stub
return null;
}
#Override
public void normalize() {
// TODO Auto-generated method stub
System.out.println("normalize 方法调用");
}
#Override
public String lookupPrefix(String arg0) {
// TODO Auto-generated method stub
return null;
}
#Override
public String lookupNamespaceURI(String arg0) {
// TODO Auto-generated method stub
return null;
}
#Override
public boolean isSupported(String arg0, String arg1) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean isSameNode(Node arg0) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean isEqualNode(Node arg0) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean isDefaultNamespace(String arg0) {
// TODO Auto-generated method stub
return false;
}
#Override
public Node insertBefore(Node arg0, Node arg1) throws DOMException {
// TODO Auto-generated method stub
return null;
}
#Override
public boolean hasChildNodes() {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean hasAttributes() {
// TODO Auto-generated method stub
return false;
}
#Override
public Object getUserData(String arg0) {
// TODO Auto-generated method stub
return null;
}
#Override
public String getTextContent() throws DOMException {
// TODO Auto-generated method stub
return null;
}
#Override
public Node getPreviousSibling() {
// TODO Auto-generated method stub
return null;
}
#Override
public String getPrefix() {
// TODO Auto-generated method stub
return null;
}
#Override
public Node getParentNode() {
// TODO Auto-generated method stub
return null;
}
#Override
public Document getOwnerDocument() {
// TODO Auto-generated method stub
return null;
}
#Override
public String getNodeValue() throws DOMException {
// TODO Auto-generated method stub
return null;
}
#Override
public short getNodeType() {
// TODO Auto-generated method stub
return 0;
}
#Override
public String getNodeName() {
// TODO Auto-generated method stub
return null;
}
#Override
public Node getNextSibling() {
// TODO Auto-generated method stub
return null;
}
#Override
public String getNamespaceURI() {
// TODO Auto-generated method stub
return null;
}
#Override
public String getLocalName() {
// TODO Auto-generated method stub
return null;
}
#Override
public Node getLastChild() {
// TODO Auto-generated method stub
return null;
}
#Override
public Node getFirstChild() {
// TODO Auto-generated method stub
return null;
}
#Override
public Object getFeature(String arg0, String arg1) {
// TODO Auto-generated method stub
return null;
}
#Override
public NodeList getChildNodes() {
// TODO Auto-generated method stub
return null;
}
#Override
public String getBaseURI() {
// TODO Auto-generated method stub
return null;
}
#Override
public NamedNodeMap getAttributes() {
// TODO Auto-generated method stub
return null;
}
#Override
public short compareDocumentPosition(Node arg0) throws DOMException {
// TODO Auto-generated method stub
return 0;
}
#Override
public Node cloneNode(boolean arg0) {
// TODO Auto-generated method stub
return null;
}
#Override
public Node appendChild(Node arg0) throws DOMException {
// TODO Auto-generated method stub
return null;
}
};
node.normalize();
}
Everything goes well when run in eclipse environment, but, when release the product, ERRORS in log when runs:
Root exception:
java.lang.NoClassDefFoundError: org/w3c/dom/Node
Caused by: java.lang.ClassNotFoundException: org.w3c.dom.Node
Anyone can give some help?

Answer 1

OSGi gives access to system packages but only java.* packages by default, this does not include other packages like: javax.net , javax.xml , com.sun
Thus it is necessary to specify any of such packages for OSGi framework to export them through the system bundle making them accessible to other bundles that import them.
To do that you need to set a configuration property with the additional packages required by your bundles, try setting it as a system property before starting the OSGi framework such that it picks up this property when it first starts.
Assuming you are on OSGi 4.2, that property would be configured like:
org.osgi.framework.system.packages.extra=org.w3c.dom
You may want to check the Apache Felix Framework Configuration Properties for more details, though this property is part of the OSGi spec and thus should be available in other implementations as well

Answer 2

Please update your question to include the bundle's MANIFEST.MF
It looks like org.w3c.dom is not implicitly provided in your production. Check the Import-Package header, may be you don't have Import-Package: org.w3c.dom

Answer 3

If you are using Equinox, you can edit the config.ini and add "org.w3c.dom" to org.osgi.framework.system.packages key and import the same packages in your MANIFEST.MF

Answer 4

in my case adding
org.osgi.framework.bootdelegation=xx...xxx,org.w3c.dom
solved my problem.