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JAXRPC Reference Implementation
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package com.sun.xml.rpc.client.dii;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.rmi.RemoteException;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.xml.rpc.Call;
import javax.xml.rpc.Stub;
import javax.xml.rpc.holders.Holder;
import com.sun.xml.rpc.client.StubPropertyConstants;
import com.sun.xml.rpc.soap.streaming.SOAPNamespaceConstants;
import com.sun.xml.rpc.util.Holders;
import com.sun.xml.rpc.util.exception.LocalizableExceptionAdapter;
/**
* @author JAX-RPC Development Team
*/
public class CallInvocationHandler implements InvocationHandler, Stub {
private static final Set recognizedProperties;
private Map callMap = new HashMap();
private Map properties = new HashMap();
private Class portInterface;
static {
Set temp = new HashSet();
temp.add(USERNAME_PROPERTY);
temp.add(PASSWORD_PROPERTY);
temp.add(ENDPOINT_ADDRESS_PROPERTY);
temp.add(SESSION_MAINTAIN_PROPERTY);
temp.add(StubPropertyConstants.HTTP_COOKIE_JAR);
recognizedProperties = Collections.unmodifiableSet(temp);
}
//InvocationHandler for the Dynamic Proxy
CallInvocationHandler(Class portInterface) {
this.portInterface = portInterface;
}
//add the call and store in the call map keyed by Method
public void addCall(Method key, Call call) {
callMap.put(key, call);
}
public Call getCall(Method key) {
return (Call) callMap.get(key);
}
//does a sanity check and makes sure configured call actually
//exists in the java methods declaring class
public Object invoke(Object proxy, Method method, Object[] args)
throws Exception {
if (portInterface.equals(method.getDeclaringClass())) {
Call call = getCall(method);
if (call == null) {
String knownMethodNames = "";
Iterator eachKnownMethod = callMap.keySet().iterator();
while (eachKnownMethod.hasNext()) {
Method knownMethod = (Method) eachKnownMethod.next();
knownMethodNames += "\n" + knownMethod.getName();
}
throw new DynamicInvocationException("dii.dynamicproxy.method.unrecognized",
new Object[]{
method != null ? method.getName() : null,
knownMethodNames});
}
//good it checks out ok do it
return doCall(call, args);
} else {
//this method isn't in the port interface
//invoke anyway
return doNonPort(method, args);
}
}
protected Object doCall(Call call, Object[] args) throws RemoteException {
//if no args just make Object so we don't get NPE
if (args == null) {
args = new Object[0];
}
//process holders
Holder[] holders = new Holder[args.length];
int[] holderLocations = new int[args.length];
int lastHolderIndex = 0;
for (int i = 0; i < args.length; i++) {
Object arg = args[i];
if (arg instanceof Holder) {
Holder holderArg = (Holder) arg;
//get the holder arg location
holderLocations[lastHolderIndex] = i;
//save the holder argument
holders[lastHolderIndex] = holderArg;
//get the value of the holder and
//set as argument
args[i] = Holders.getValue(holderArg);
++lastHolderIndex;
}
}
//invoke BasicCall.invoke(args)
Object returnValue = call.invoke(args);
//we got the return value, let's get other out values
//and set the appropriate holder with the returned value
if (lastHolderIndex > 0) {
List outputValues = call.getOutputValues();
Iterator eachOutputValue = outputValues.iterator();
int holderIndex = 0;
while (eachOutputValue.hasNext()) {
Object outParameter = eachOutputValue.next();
int holderLocation = holderLocations[holderIndex];
Holder holder = holders[holderIndex];
Holders.setValue(holder, outParameter);
args[holderLocation] = holder;
++holderIndex;
}
}
return returnValue;
}
protected Object doNonPort(Method method, Object[] args) {
//use reflection to invoke this unknown method
try {
return method.invoke(this, args);
} catch (Exception e) {
throw new DynamicInvocationException("dii.exception.nested",
new LocalizableExceptionAdapter(e));
}
}
public void _setProperty(String name, Object value) {
if (!recognizedProperties.contains(name)) {
throw new IllegalArgumentException("Call object does not recognize property: " + name);
}
properties.put(name, value);
setPropertyOnCallObjects(name, value);
}
public Object _getProperty(String name) {
return properties.get(name);
}
public Iterator _getPropertyNames() {
return properties.keySet().iterator();
}
private void setPropertyOnCallObjects(String propertyName, Object value) {
for (Iterator eachCall = callMap.values().iterator();
eachCall.hasNext();
) {
Call call = (Call) eachCall.next();
if (Stub.ENDPOINT_ADDRESS_PROPERTY.equals(propertyName)) {
call.setTargetEndpointAddress((String) value);
} else {
call.setProperty(propertyName, value);
}
}
}
//used by streaming sender and callInvokerImpl during invocation
// - do not remove
public String _getDefaultEnvelopeEncodingStyle() {
return null;
}
public String _getImplicitEnvelopeEncodingStyle() {
return "";
}
public String _getEncodingStyle() {
return SOAPNamespaceConstants.ENCODING;
}
public void _setEncodingStyle(String encodingStyle) {
throw new UnsupportedOperationException("cannot set encoding style");
}
}
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