@Override
public String intercept(ActionInvocation invocation) throws Exception {
ActionConfig config = invocation.getProxy().getConfig();
ActionContext ac = invocation.getInvocationContext();
Object action = invocation.getAction();
// get the action's parameters
final Map<String, String> parameters = config.getParams();
if (parameters.containsKey(aliasesKey)) {
String aliasExpression = parameters.get(aliasesKey);
ValueStack stack = ac.getValueStack();
Object obj = stack.findValue(aliasExpression);
if (obj != null && obj instanceof Map) {
// get secure stack
ValueStack newStack = valueStackFactory.createValueStack(stack);
boolean clearableStack = newStack instanceof ClearableValueStack;
if (clearableStack) {
// if the stack's context can be cleared, do that to prevent OGNL
// from having access to objects in the stack, see XW-641
((ClearableValueStack) newStack).clearContextValues();
Map<String, Object> context = newStack.getContext();
ReflectionContextState.setCreatingNullObjects(context, true);
ReflectionContextState.setDenyMethodExecution(context, true);
ReflectionContextState.setReportingConversionErrors(context, true);
// keep locale from original context
context.put(ActionContext.LOCALE, stack.getContext().get(ActionContext.LOCALE));
}
// override
Map aliases = (Map) obj;
for (Object o : aliases.entrySet()) {
Map.Entry entry = (Map.Entry) o;
String name = entry.getKey().toString();
String alias = (String) entry.getValue();
Object value = stack.findValue(name);
if (null == value) {
// workaround
Map<String, Object> contextParameters = ActionContext.getContext().getParameters();
if (null != contextParameters) {
value = contextParameters.get(name);
}
}
if (null != value) {
try {
newStack.setValue(alias, value);
} catch (RuntimeException e) {
if (devMode) {
String developerNotification =
LocalizedTextUtil.findText(
ParametersInterceptor.class,
"devmode.notification",
ActionContext.getContext().getLocale(),
"Developer Notification:\n{0}",
new Object[] {
"Unexpected Exception caught setting '"
+ entry.getKey()
+ "' on '"
+ action.getClass()
+ ": "
+ e.getMessage()
});
LOG.error(developerNotification);
if (action instanceof ValidationAware) {
((ValidationAware) action).addActionMessage(developerNotification);
}
}
}
}
}
if (clearableStack && (stack.getContext() != null) && (newStack.getContext() != null))
stack
.getContext()
.put(
ActionContext.CONVERSION_ERRORS,
newStack.getContext().get(ActionContext.CONVERSION_ERRORS));
} else {
LOG.debug("invalid alias expression:" + aliasesKey);
}
}
return invocation.invoke();
}
protected void setParameters(
Object action, ValueStack stack, final Map<String, Object> parameters) {
ParameterNameAware parameterNameAware =
(action instanceof ParameterNameAware) ? (ParameterNameAware) action : null;
Map<String, Object> params;
Map<String, Object> acceptableParameters;
if (ordered) {
params = new TreeMap<String, Object>(getOrderedComparator());
acceptableParameters = new TreeMap<String, Object>(getOrderedComparator());
params.putAll(parameters);
} else {
params = new TreeMap<String, Object>(parameters);
acceptableParameters = new TreeMap<String, Object>();
}
for (Map.Entry<String, Object> entry : params.entrySet()) {
String name = entry.getKey();
boolean acceptableName =
acceptableName(name)
&& (parameterNameAware == null || parameterNameAware.acceptableParameterName(name));
if (acceptableName) {
acceptableParameters.put(name, entry.getValue());
}
}
ValueStack newStack = valueStackFactory.createValueStack(stack);
boolean clearableStack = newStack instanceof ClearableValueStack;
if (clearableStack) {
// if the stack's context can be cleared, do that to prevent OGNL
// from having access to objects in the stack, see XW-641
((ClearableValueStack) newStack).clearContextValues();
Map<String, Object> context = newStack.getContext();
ReflectionContextState.setCreatingNullObjects(context, true);
ReflectionContextState.setDenyMethodExecution(context, true);
ReflectionContextState.setReportingConversionErrors(context, true);
// keep locale from original context
context.put(ActionContext.LOCALE, stack.getContext().get(ActionContext.LOCALE));
}
boolean memberAccessStack = newStack instanceof MemberAccessValueStack;
if (memberAccessStack) {
// block or allow access to properties
// see WW-2761 for more details
MemberAccessValueStack accessValueStack = (MemberAccessValueStack) newStack;
accessValueStack.setAcceptProperties(acceptParams);
accessValueStack.setExcludeProperties(excludeParams);
}
for (Map.Entry<String, Object> entry : acceptableParameters.entrySet()) {
String name = entry.getKey();
Object value = entry.getValue();
try {
newStack.setValue(name, value);
} catch (RuntimeException e) {
if (devMode) {
String developerNotification =
LocalizedTextUtil.findText(
ParametersInterceptor.class,
"devmode.notification",
ActionContext.getContext().getLocale(),
"Developer Notification:\n{0}",
new Object[] {
"Unexpected Exception caught setting '"
+ name
+ "' on '"
+ action.getClass()
+ ": "
+ e.getMessage()
});
LOG.error(developerNotification);
if (action instanceof ValidationAware) {
((ValidationAware) action).addActionMessage(developerNotification);
}
}
}
}
if (clearableStack && (stack.getContext() != null) && (newStack.getContext() != null))
stack
.getContext()
.put(
ActionContext.CONVERSION_ERRORS,
newStack.getContext().get(ActionContext.CONVERSION_ERRORS));
addParametersToContext(ActionContext.getContext(), acceptableParameters);
}