/// <summary>
/// invokes the method on the object passed in
/// </summary>
public override Object Execute(Object o, IInternalContextAdapter context)
{
bool isString = o.GetType() == typeof(string);
bool isDecimal = o.GetType() == typeof(decimal);
bool isPrimitive = o.GetType().IsPrimitive;
if (identifier == "to_quote" && (isString || isPrimitive || isDecimal))
{
return string.Format("\"{0}\"", EscapeDoubleQuote(o.ToString()));
}
else if (identifier == "to_squote" && (isString || isPrimitive || isDecimal))
{
return string.Format("'{0}'", EscapeSingleQuote(o.ToString()));
}
IDuck duck = o as IDuck;
if (duck != null)
{
return duck.GetInvoke(identifier);
}
IVelPropertyGet velPropertyGet = null;
try
{
Type c = o.GetType();
// first, see if we have this information cached.
IntrospectionCacheData introspectionCacheData = context.ICacheGet(this);
// if we have the cache data and the class of the object we are
// invoked with is the same as that in the cache, then we must
// be all-right. The last 'variable' is the method name, and
// that is fixed in the template :)
if (introspectionCacheData != null && introspectionCacheData.ContextData == c)
{
velPropertyGet = (IVelPropertyGet) introspectionCacheData.Thingy;
}
else
{
// otherwise, do the introspection, and cache it
velPropertyGet = runtimeServices.Uberspect.GetPropertyGet(o, identifier, uberInfo);
if (velPropertyGet != null && velPropertyGet.Cacheable)
{
introspectionCacheData = new IntrospectionCacheData(c, velPropertyGet);
context.ICachePut(this, introspectionCacheData);
}
}
}
catch(Exception e)
{
runtimeServices.Error(string.Format("ASTIdentifier.execute() : identifier = {0} : {1}", identifier, e));
}
// we have no executor... punt...
if (velPropertyGet == null)
return null;
// now try and execute. If we get a TargetInvocationException,
// throw that as the app wants to get these. If not, log and punt.
try
{
return velPropertyGet.Invoke(o);
}
catch(TargetInvocationException targetInvocationException)
{
EventCartridge ec = context.EventCartridge;
// if we have an event cartridge, see if it wants to veto
// also, let non-Exception Throwables go...
if (ec == null)
{
// no event cartridge to override. Just throw
String message = String.Format(
"Invocation of method '{0}' in {1}, template {2} Line {3} Column {4} threw an exception",
velPropertyGet.MethodName, o != null ? o.GetType().FullName : string.Empty,
uberInfo.TemplateName, uberInfo.Line, uberInfo.Column);
throw new MethodInvocationException(message, targetInvocationException.InnerException, velPropertyGet.MethodName);
}
else
{
try
{
return ec.HandleMethodException(o.GetType(), velPropertyGet.MethodName, targetInvocationException.InnerException);
}
catch(Exception)
{
String message = String.Format(
"Invocation of method '{0}' in {1}, template {2} Line {3} Column {4} threw an exception",
velPropertyGet.MethodName, o != null ? o.GetType().FullName : string.Empty,
uberInfo.TemplateName, uberInfo.Line, uberInfo.Column);
throw new MethodInvocationException(message, targetInvocationException.InnerException, velPropertyGet.MethodName);
}
}
}
catch(ArgumentException)
{
return null;
}
catch(Exception e)
{
runtimeServices.Error(
string.Format("ASTIdentifier() : exception invoking method for identifier '{0}' in {1} : {2}", identifier,
o.GetType(), e));
}
return null;
}
/// <summary>
/// returns an Iterator to the collection in the #foreach()
/// </summary>
/// <param name="context"> current context </param>
/// <param name="node"> AST node </param>
/// <returns>Iterator to do the dataset </returns>
private IEnumerator GetIterator(IInternalContextAdapter context, INode node)
{
// get our list object, and punt if it's null.
Object listObject = node.GetChild(2).Value(context);
// if we have an event cartridge, get a new value object
NVelocity.App.Events.EventCartridge eventCartridge = context.EventCartridge;
if (eventCartridge != null)
{
listObject = eventCartridge.ReferenceInsert(new Stack(), node.GetChild(2).Literal, listObject);
}
if (listObject == null)
{
return(null);
}
// See if we already know what type this is.
// Use the introspection cache
EnumType type = EnumType.Unknown;
IntrospectionCacheData introspectionCacheData = context.ICacheGet(this);
Type c = listObject.GetType();
// if we have an entry in the cache, and the Class we have
// cached is the same as the Class of the data object
// then we are ok
if (introspectionCacheData != null && introspectionCacheData.ContextData == c)
{
// dig the type out of the data object
type = ((EnumType)introspectionCacheData.Thingy);
}
// If we still don't know what this is,
// figure out what type of object the list
// element is, and get the iterator for it
if (type == EnumType.Unknown)
{
if (listObject.GetType().IsArray)
{
type = EnumType.Array;
}
else if (listObject is IDictionary)
{
type = EnumType.Dictionary;
}
else if (listObject is ICollection)
{
type = EnumType.Collection;
}
else if (listObject is IEnumerable)
{
type = EnumType.Enumerable;
}
else if (listObject is IEnumerator)
{
type = EnumType.Enumeration;
}
// if we did figure it out, cache it
if (type != EnumType.Unknown)
{
introspectionCacheData = new IntrospectionCacheData(c, type);
context.ICachePut(this, introspectionCacheData);
}
}
// now based on the type from either cache or examination...
switch (type)
{
case EnumType.Collection:
return(((ICollection)listObject).GetEnumerator());
case EnumType.Enumerable:
return(((IEnumerable)listObject).GetEnumerator());
case EnumType.Enumeration:
runtimeServices.Warn(
string.Format(
"Warning! The reference {0} is an Enumeration in the #foreach() loop at [{1},{2}] in template {3}. Because it's not resetable, if used in more than once, this may lead to unexpected results.",
node.GetChild(2).FirstToken.Image, Line, Column, context.CurrentTemplateName));
return((IEnumerator)listObject);
case EnumType.Array:
return(((Array)listObject).GetEnumerator());
case EnumType.Dictionary:
return(((IDictionary)listObject).GetEnumerator());
default:
/* we have no clue what this is */
runtimeServices.Warn(
string.Format(
"Could not determine type of enumerator ({0}) in #foreach loop for {1} at [{2},{3}] in template {4}",
listObject.GetType().Name, node.GetChild(2).FirstToken.Image, Line, Column, context.CurrentTemplateName));
return(null);
}
}
/// <summary>
/// invokes the method. Returns null if a problem, the
/// actual return if the method returns something, or
/// an empty string "" if the method returns void
/// </summary>
public override Object Execute(Object o, IInternalContextAdapter context)
{
IDuck duck = o as IDuck;
object[] parameters = new object[paramCount];
if (duck != null)
{
EvalParameters(parameters, context);
return duck.Invoke(methodName, parameters);
}
/*
* new strategy (strategy!) for introspection. Since we want
* to be thread- as well as context-safe, we *must* do it now,
* at execution time. There can be no in-node caching,
* but if we are careful, we can do it in the context.
*/
MethodInfo method = null;
PropertyInfo property = null;
bool preparedAlready = false;
object[] methodArguments = new object[paramCount];
try
{
/*
* check the cache
*/
IntrospectionCacheData introspectionCacheData = context.ICacheGet(this);
Type c = o.GetType();
/*
* like ASTIdentifier, if we have cache information, and the
* Class of Object o is the same as that in the cache, we are
* safe.
*/
EvalParameters(parameters, context);
if (introspectionCacheData != null && introspectionCacheData.ContextData == c)
{
preparedAlready = true;
/*
* and get the method from the cache
*/
if (introspectionCacheData.Thingy is MethodInfo)
{
method = (MethodInfo) introspectionCacheData.Thingy;
methodArguments = BuildMethodArgs(method, parameters, paramArrayIndex);
}
if (introspectionCacheData.Thingy is PropertyInfo)
{
property = (PropertyInfo) introspectionCacheData.Thingy;
}
}
else
{
/*
* otherwise, do the introspection, and then
* cache it
*/
Object obj = PerformIntrospection(context, c, parameters);
if (obj is MethodInfo)
{
method = (MethodInfo) obj;
}
if (obj is PropertyInfo)
{
property = (PropertyInfo) obj;
}
if (obj != null)
{
introspectionCacheData = new IntrospectionCacheData();
introspectionCacheData.ContextData = c;
introspectionCacheData.Thingy = obj;
context.ICachePut(this, introspectionCacheData);
}
}
/*
* if we still haven't gotten the method, either we are calling
* a method that doesn't exist (which is fine...) or I screwed
* it up.
*/
if (method == null && property == null)
{
return null;
}
}
catch(Exception ex)
{
runtimeServices.Error(string.Format("ASTMethod.execute() : exception from introspection : {0}", ex));
throw new RuntimeException(
String.Format(
"Error during object introspection. Check inner exception for details. Node literal {0} Line {1} Column {2}",
base.Literal, Line, Column), ex);
}
try
{
/*
* get the returned object. It may be null, and that is
* valid for something declared with a void return type.
* Since the caller is expecting something to be returned,
* as long as things are peachy, we can return an empty
* String so ASTReference() correctly figures out that
* all is well.
*/
Object obj;
if (method == null)
{
obj = property.GetValue(o, null);
}
else
{
if (!preparedAlready)
{
methodArguments = BuildMethodArgs(method, parameters);
}
obj = method.Invoke(o, methodArguments);
if (obj == null && method.ReturnType == typeof(void))
{
obj = String.Empty;
}
}
return obj;
}
catch(TargetInvocationException targetInvocationException)
{
/*
* In the event that the invocation of the method
* itself throws an exception, we want to catch that
* wrap it, and throw. We don't log here as we want to figure
* out which reference threw the exception, so do that
* above
*/
EventCartridge eventCartridge = context.EventCartridge;
/*
* if we have an event cartridge, see if it wants to veto
* also, let non-Exception Throwables go...
*/
if (eventCartridge == null)
{
/*
* no event cartridge to override. Just throw
*/
throw new MethodInvocationException(
string.Format("Invocation of method '{0}' in {1} threw exception {2} : {3}", methodName, o.GetType(),
targetInvocationException.GetBaseException().GetType(),
targetInvocationException.GetBaseException().Message), targetInvocationException.GetBaseException(),
methodName);
}
else
{
try
{
return eventCartridge.HandleMethodException(o.GetType(), methodName, targetInvocationException.GetBaseException());
}
catch(Exception e)
{
throw new MethodInvocationException(
string.Format("Invocation of method '{0}' in {1} threw exception {2} : {3}", methodName, o.GetType(),
e.GetType(), e.Message), e, methodName);
}
}
}
catch(Exception e)
{
runtimeServices.Error(
string.Format("ASTMethod.execute() : exception invoking method '{0}' in {1} : {2}", methodName, o.GetType(), e));
throw e;
}
}
/// <summary>
/// returns an Iterator to the collection in the #foreach()
/// </summary>
/// <param name="context"> current context </param>
/// <param name="node"> AST node </param>
/// <returns>Iterator to do the dataset </returns>
private IEnumerator GetIterator(IInternalContextAdapter context, INode node)
{
// get our list object, and punt if it's null.
Object listObject = node.GetChild(2).Value(context);
// if we have an event cartridge, get a new value object
NVelocity.App.Events.EventCartridge eventCartridge = context.EventCartridge;
if (eventCartridge != null)
{
listObject = eventCartridge.ReferenceInsert(new Stack(), node.GetChild(2).Literal, listObject);
}
if (listObject == null)
{
return null;
}
// See if we already know what type this is.
// Use the introspection cache
EnumType type = EnumType.Unknown;
IntrospectionCacheData introspectionCacheData = context.ICacheGet(this);
Type c = listObject.GetType();
// if we have an entry in the cache, and the Class we have
// cached is the same as the Class of the data object
// then we are ok
if (introspectionCacheData != null && introspectionCacheData.ContextData == c)
{
// dig the type out of the data object
type = ((EnumType)introspectionCacheData.Thingy);
}
// If we still don't know what this is,
// figure out what type of object the list
// element is, and get the iterator for it
if (type == EnumType.Unknown)
{
if (listObject.GetType().IsArray)
{
type = EnumType.Array;
}
else if (listObject is IDictionary)
{
type = EnumType.Dictionary;
}
else if (listObject is ICollection)
{
type = EnumType.Collection;
}
else if (listObject is IEnumerable)
{
type = EnumType.Enumerable;
}
else if (listObject is IEnumerator)
{
type = EnumType.Enumeration;
}
// if we did figure it out, cache it
if (type != EnumType.Unknown)
{
introspectionCacheData = new IntrospectionCacheData(c, type);
context.ICachePut(this, introspectionCacheData);
}
}
// now based on the type from either cache or examination...
switch (type)
{
case EnumType.Collection:
return ((ICollection)listObject).GetEnumerator();
case EnumType.Enumerable:
return ((IEnumerable)listObject).GetEnumerator();
case EnumType.Enumeration:
runtimeServices.Warn(
string.Format(
"Warning! The reference {0} is an Enumeration in the #foreach() loop at [{1},{2}] in template {3}. Because it's not resetable, if used in more than once, this may lead to unexpected results.",
node.GetChild(2).FirstToken.Image, Line, Column, context.CurrentTemplateName));
return (IEnumerator)listObject;
case EnumType.Array:
return ((Array)listObject).GetEnumerator();
case EnumType.Dictionary:
return ((IDictionary)listObject).GetEnumerator();
default:
/* we have no clue what this is */
runtimeServices.Warn(
string.Format(
"Could not determine type of enumerator ({0}) in #foreach loop for {1} at [{2},{3}] in template {4}",
listObject.GetType().Name, node.GetChild(2).FirstToken.Image, Line, Column, context.CurrentTemplateName));
return null;
}
}
/// <summary>
/// invokes the method. Returns null if a problem, the
/// actual return if the method returns something, or
/// an empty string "" if the method returns void
/// </summary>
public override Object Execute(Object o, IInternalContextAdapter context)
{
IDuck duck = o as IDuck;
object[] parameters = new object[paramCount];
if (duck != null)
{
EvalParameters(parameters, context);
return(duck.Invoke(methodName, parameters));
}
/*
* new strategy (strategy!) for introspection. Since we want
* to be thread- as well as context-safe, we *must* do it now,
* at execution time. There can be no in-node caching,
* but if we are careful, we can do it in the context.
*/
MethodInfo method = null;
PropertyInfo property = null;
bool preparedAlready = false;
object[] methodArguments = new object[paramCount];
try
{
/*
* check the cache
*/
IntrospectionCacheData introspectionCacheData = context.ICacheGet(this);
Type c = o.GetType();
/*
* like ASTIdentifier, if we have cache information, and the
* Class of Object o is the same as that in the cache, we are
* safe.
*/
EvalParameters(parameters, context);
if (introspectionCacheData != null && introspectionCacheData.ContextData == c)
{
preparedAlready = true;
/*
* and get the method from the cache
*/
if (introspectionCacheData.Thingy is MethodInfo)
{
method = (MethodInfo)introspectionCacheData.Thingy;
methodArguments = BuildMethodArgs(method, parameters, paramArrayIndex);
}
if (introspectionCacheData.Thingy is PropertyInfo)
{
property = (PropertyInfo)introspectionCacheData.Thingy;
}
}
else
{
/*
* otherwise, do the introspection, and then
* cache it
*/
Object obj = PerformIntrospection(context, c, parameters);
if (obj is MethodInfo)
{
method = (MethodInfo)obj;
}
if (obj is PropertyInfo)
{
property = (PropertyInfo)obj;
}
if (obj != null)
{
introspectionCacheData = new IntrospectionCacheData();
introspectionCacheData.ContextData = c;
introspectionCacheData.Thingy = obj;
context.ICachePut(this, introspectionCacheData);
}
}
/*
* if we still haven't gotten the method, either we are calling
* a method that doesn't exist (which is fine...) or I screwed
* it up.
*/
if (method == null && property == null)
{
return(null);
}
}
catch (Exception ex)
{
runtimeServices.Error(string.Format("ASTMethod.execute() : exception from introspection : {0}", ex));
throw new RuntimeException(
String.Format(
"Error during object introspection. Check inner exception for details. Node literal {0} Line {1} Column {2}",
base.Literal, Line, Column), ex);
}
try
{
/*
* get the returned object. It may be null, and that is
* valid for something declared with a void return type.
* Since the caller is expecting something to be returned,
* as long as things are peachy, we can return an empty
* String so ASTReference() correctly figures out that
* all is well.
*/
Object obj;
if (method == null)
{
obj = property.GetValue(o, null);
}
else
{
if (!preparedAlready)
{
methodArguments = BuildMethodArgs(method, parameters);
}
obj = method.Invoke(o, methodArguments);
if (obj == null && method.ReturnType == typeof(void))
{
obj = String.Empty;
}
}
return(obj);
}
catch (TargetInvocationException targetInvocationException)
{
/*
* In the event that the invocation of the method
* itself throws an exception, we want to catch that
* wrap it, and throw. We don't log here as we want to figure
* out which reference threw the exception, so do that
* above
*/
EventCartridge eventCartridge = context.EventCartridge;
/*
* if we have an event cartridge, see if it wants to veto
* also, let non-Exception Throwables go...
*/
if (eventCartridge == null)
{
/*
* no event cartridge to override. Just throw
*/
throw new MethodInvocationException(
string.Format("Invocation of method '{0}' in {1} threw exception {2} : {3}", methodName, o.GetType(),
targetInvocationException.GetBaseException().GetType(),
targetInvocationException.GetBaseException().Message), targetInvocationException,
methodName);
}
else
{
try
{
return(eventCartridge.HandleMethodException(o.GetType(), methodName, targetInvocationException));
}
catch (Exception e)
{
throw new MethodInvocationException(
string.Format("Invocation of method '{0}' in {1} threw exception {2} : {3}", methodName, o.GetType(),
e.GetType(), e.Message), e, methodName);
}
}
}
catch (Exception e)
{
runtimeServices.Error(
string.Format("ASTMethod.execute() : exception invoking method '{0}' in {1} : {2}", methodName, o.GetType(), e));
throw;
}
}
public override object Execute(object o, IInternalContextAdapter context)
{
MethodInfo methodInfo = null;
PropertyInfo propertyInfo = null;
bool flag = false;
object[] array = this.parameters;
object result;
try
{
IntrospectionCacheData introspectionCacheData = context.ICacheGet(this);
Type type = o.GetType();
if (introspectionCacheData != null && introspectionCacheData.ContextData == type)
{
for (int i = 0; i < this.paramCount; i++)
{
this.parameters[i] = base.GetChild(i + 1).Value(context);
}
flag = true;
if (introspectionCacheData.Thingy is MethodInfo)
{
methodInfo = (MethodInfo)introspectionCacheData.Thingy;
array = this.BuildMethodArgs(methodInfo, this.paramArrayIndex);
}
if (introspectionCacheData.Thingy is PropertyInfo)
{
propertyInfo = (PropertyInfo)introspectionCacheData.Thingy;
}
}
else
{
object obj = this.doIntrospection(context, type);
if (obj is MethodInfo)
{
methodInfo = (MethodInfo)obj;
}
if (obj is PropertyInfo)
{
propertyInfo = (PropertyInfo)obj;
}
if (obj != null)
{
context.ICachePut(this, new IntrospectionCacheData
{
ContextData = type,
Thingy = obj
});
}
}
if (methodInfo == null && propertyInfo == null)
{
result = null;
return(result);
}
}
catch (System.Exception ex)
{
this.rsvc.Error("ASTMethod.execute() : exception from introspection : " + ex);
throw new RuntimeException(string.Format("Error during object instrospection. Check inner exception for details. Node literal {0} Line {1} Column {2}", base.Literal, base.Line, base.Column), ex);
}
try
{
object obj;
if (methodInfo != null)
{
if (!flag)
{
array = this.BuildMethodArgs(methodInfo);
}
obj = methodInfo.Invoke(o, array);
if (obj == null && methodInfo.ReturnType == typeof(void))
{
obj = string.Empty;
}
}
else
{
obj = propertyInfo.GetValue(o, null);
}
result = obj;
}
catch (TargetInvocationException ex2)
{
EventCartridge eventCartridge = context.EventCartridge;
if (eventCartridge != null)
{
try
{
result = eventCartridge.HandleMethodException(o.GetType(), this.methodName, ex2.GetBaseException());
return(result);
}
catch (System.Exception ex3)
{
throw new MethodInvocationException(string.Concat(new object[]
{
"Invocation of method '",
this.methodName,
"' in ",
o.GetType(),
" threw exception ",
ex3.GetType(),
" : ",
ex3.Message
}), ex3, this.methodName);
}
}
throw new MethodInvocationException(string.Concat(new object[]
{
"Invocation of method '",
this.methodName,
"' in ",
o.GetType(),
" threw exception ",
ex2.GetBaseException().GetType(),
" : ",
ex2.GetBaseException().Message
}), ex2.GetBaseException(), this.methodName);
}
catch (System.Exception ex3)
{
this.rsvc.Error(string.Concat(new object[]
{
"ASTMethod.execute() : exception invoking method '",
this.methodName,
"' in ",
o.GetType(),
" : ",
ex3
}));
throw ex3;
}
return(result);
}
/// <summary>
/// invokes the method on the object passed in
/// </summary>
public override Object Execute(Object o, IInternalContextAdapter context)
{
bool isString = o.GetType() == typeof(string);
bool isDecimal = o.GetType() == typeof(decimal);
bool isPrimitive = o.GetType().IsPrimitive;
if (identifier == "to_quote" && (isString || isPrimitive || isDecimal))
{
return(string.Format("\"{0}\"", EscapeDoubleQuote(o.ToString())));
}
else if (identifier == "to_squote" && (isString || isPrimitive || isDecimal))
{
return(string.Format("'{0}'", EscapeSingleQuote(o.ToString())));
}
IDuck duck = o as IDuck;
if (duck != null)
{
return(duck.GetInvoke(identifier));
}
IVelPropertyGet velPropertyGet = null;
try
{
Type c = o.GetType();
// first, see if we have this information cached.
IntrospectionCacheData introspectionCacheData = context.ICacheGet(this);
// if we have the cache data and the class of the object we are
// invoked with is the same as that in the cache, then we must
// be all-right. The last 'variable' is the method name, and
// that is fixed in the template :)
if (introspectionCacheData != null && introspectionCacheData.ContextData == c)
{
velPropertyGet = (IVelPropertyGet)introspectionCacheData.Thingy;
}
else
{
// otherwise, do the introspection, and cache it
velPropertyGet = runtimeServices.Uberspect.GetPropertyGet(o, identifier, uberInfo);
if (velPropertyGet != null && velPropertyGet.Cacheable)
{
introspectionCacheData = new IntrospectionCacheData(c, velPropertyGet);
context.ICachePut(this, introspectionCacheData);
}
}
}
catch (Exception e)
{
runtimeServices.Error(string.Format("ASTIdentifier.execute() : identifier = {0} : {1}", identifier, e));
}
// we have no executor... punt...
if (velPropertyGet == null)
{
return(null);
}
// now try and execute. If we get a TargetInvocationException,
// throw that as the app wants to get these. If not, log and punt.
try
{
return(velPropertyGet.Invoke(o));
}
catch (TargetInvocationException targetInvocationException)
{
EventCartridge ec = context.EventCartridge;
// if we have an event cartridge, see if it wants to veto
// also, let non-Exception Throwables go...
if (ec == null)
{
// no event cartridge to override. Just throw
String message = String.Format(
"Invocation of method '{0}' in {1}, template {2} Line {3} Column {4} threw an exception",
velPropertyGet.MethodName, o != null ? o.GetType().FullName : string.Empty,
uberInfo.TemplateName, uberInfo.Line, uberInfo.Column);
throw new MethodInvocationException(message, targetInvocationException.InnerException, velPropertyGet.MethodName);
}
else
{
try
{
return(ec.HandleMethodException(o.GetType(), velPropertyGet.MethodName, targetInvocationException.InnerException));
}
catch (Exception)
{
String message = String.Format(
"Invocation of method '{0}' in {1}, template {2} Line {3} Column {4} threw an exception",
velPropertyGet.MethodName, o != null ? o.GetType().FullName : string.Empty,
uberInfo.TemplateName, uberInfo.Line, uberInfo.Column);
throw new MethodInvocationException(message, targetInvocationException.InnerException, velPropertyGet.MethodName);
}
}
}
catch (ArgumentException)
{
return(null);
}
catch (Exception e)
{
runtimeServices.Error(
string.Format("ASTIdentifier() : exception invoking method for identifier '{0}' in {1} : {2}", identifier,
o.GetType(), e));
}
return(null);
}
/// <summary> invokes the method. Returns null if a problem, the
/// parameters return if the method returns something, or
/// an empty string "" if the method returns void
/// </summary>
/// <param name="instance">
/// </param>
/// <param name="context">
/// </param>
/// <returns> Result or null.
/// </returns>
/// <throws> MethodInvocationException </throws>
public override object Execute(object o, IInternalContextAdapter context)
{
/*
* new strategy (strategery!) for introspection. Since we want
* to be thread- as well as context-safe, we *must* do it now,
* at execution time. There can be no in-node caching,
* but if we are careful, we can do it in the context.
*/
IVelMethod method = null;
object[] params_Renamed = new object[paramCount];
try
{
/*
* sadly, we do need recalc the values of the args, as this can
* change from visit to visit
*/
System.Type[] paramClasses = paramCount > 0 ? new System.Type[paramCount] : new System.Collections.Generic.List <Type>().ToArray();
for (int j = 0; j < paramCount; j++)
{
params_Renamed[j] = GetChild(j + 1).Value(context);
if (params_Renamed[j] != null)
{
paramClasses[j] = params_Renamed[j].GetType();
}
}
/*
* check the cache
*/
MethodCacheKey mck = new MethodCacheKey(methodName, paramClasses);
IntrospectionCacheData icd = context.ICacheGet(mck);
/*
* like ASTIdentifier, if we have cache information, and the
* Class of Object instance is the same as that in the cache, we are
* safe.
*/
if (icd != null && (o != null && icd.ContextData == o.GetType()))
{
/*
* Get the method from the cache
*/
method = (IVelMethod)icd.Thingy;
}
else
{
/*
* otherwise, do the introspection, and then
* cache it
*/
method = rsvc.Uberspect.GetMethod(o, methodName, params_Renamed, new Info(TemplateName, Line, Column));
if ((method != null) && (o != null))
{
icd = new IntrospectionCacheData();
icd.ContextData = o.GetType();
icd.Thingy = method;
context.ICachePut(mck, icd);
}
}
/*
* if we still haven't gotten the method, either we are calling
* a method that doesn't exist (which is fine...) or I screwed
* it up.
*/
if (method == null)
{
if (strictRef)
{
// Create a parameter list for the exception Error message
System.Text.StringBuilder plist = new System.Text.StringBuilder();
for (int i = 0; i < params_Renamed.Length; i++)
{
System.Type param = paramClasses[i];
plist.Append(param == null ? "null" : param.FullName);
if (i < params_Renamed.Length - 1)
{
plist.Append(", ");
}
}
throw new MethodInvocationException("Object '" + o.GetType().FullName + "' does not contain method " + methodName + "(" + plist + ")", null, methodName, uberInfo.TemplateName, uberInfo.Line, uberInfo.Column);
}
else
{
return(null);
}
}
}
catch (MethodInvocationException mie)
{
/*
* this can come from the doIntrospection(), as the arg values
* are evaluated to find the right method signature. We just
* want to propogate it here, not do anything fancy
*/
throw mie;
}
/**
* pass through application level runtime exceptions
*/
catch (System.SystemException e)
{
throw e;
}
catch (System.Exception e)
{
/*
* can come from the doIntropection() also, from Introspector
*/
string msg = "ASTMethod.Execute() : exception from introspection";
log.Error(msg, e);
throw new VelocityException(msg, e);
}
try
{
/*
* Get the returned object. It may be null, and that is
* valid for something declared with a void return type.
* Since the caller is expecting something to be returned,
* as long as things are peachy, we can return an empty
* String so ASTReference() correctly figures out that
* all is well.
*/
object obj = method.Invoke(o, params_Renamed);
if (obj == null)
{
if (method.ReturnType == System.Type.GetType("System.Void"))
{
return("");
}
}
return(obj);
}
catch (System.Reflection.TargetInvocationException ite)
{
return(HandleInvocationException(o, context, ite.GetBaseException()));
}
/** Can also be thrown by method invocation **/
catch (System.ArgumentException t)
{
return(HandleInvocationException(o, context, t));
}
/**
* pass through application level runtime exceptions
*/
catch (System.SystemException e)
{
throw e;
}
catch (System.Exception e)
{
string msg = "ASTMethod.Execute() : exception invoking method '" + methodName + "' in " + o.GetType();
log.Error(msg, e);
throw new VelocityException(msg, e);
}
}
public IntrospectionCacheData ICacheGet(Object key)
{
return(innerContext.ICacheGet(key));
}
public IntrospectionCacheData ICacheGet(object key)
{
return(context.ICacheGet(key));
}
/// <summary>
/// invokes the method on the object passed in
/// </summary>
public override Object Execute(Object o, IInternalContextAdapter context)
{
if (identifier == "to_quote" && (o.GetType() == typeof(string) ||
o.GetType().IsPrimitive || o.GetType() == typeof(decimal)))
{
return "\"" + EscapeDoubleQuote(o.ToString()) + "\"";
}
else if (identifier == "to_squote" && (o.GetType() == typeof(string) ||
o.GetType().IsPrimitive || o.GetType() == typeof(decimal)))
{
return "'" + EscapeSingleQuote(o.ToString()) + "'";
}
IDuck duck = o as IDuck;
if (duck != null)
{
return duck.GetInvoke(identifier);
}
IVelPropertyGet vg = null;
try
{
Type c = o.GetType();
// first, see if we have this information cached.
IntrospectionCacheData icd = context.ICacheGet(this);
// if we have the cache data and the class of the object we are
// invoked with is the same as that in the cache, then we must
// be allright. The last 'variable' is the method name, and
// that is fixed in the template :)
if (icd != null && icd.ContextData == c)
{
vg = (IVelPropertyGet) icd.Thingy;
}
else
{
// otherwise, do the introspection, and cache it
vg = rsvc.Uberspect.GetPropertyGet(o, identifier, uberInfo);
if (vg != null && vg.Cacheable)
{
icd = new IntrospectionCacheData(c, vg);
context.ICachePut(this, icd);
}
}
}
catch(Exception e)
{
rsvc.Error("ASTIdentifier.execute() : identifier = " + identifier + " : " + e);
}
// we have no executor... punt...
if (vg == null)
return null;
// now try and execute. If we get a TargetInvocationException,
// throw that as the app wants to get these. If not, log and punt.
try
{
return vg.Invoke(o);
}
catch(TargetInvocationException ite)
{
EventCartridge ec = context.EventCartridge;
// if we have an event cartridge, see if it wants to veto
// also, let non-Exception Throwables go...
if (ec != null)
{
try
{
return ec.HandleMethodException(o.GetType(), vg.MethodName, ite.InnerException);
}
catch(Exception)
{
String message = String.Format(
"Invocation of method '{0}' in {1}, template {2} Line {3} Column {4} threw an exception",
vg.MethodName, o != null ? o.GetType().FullName : "",
uberInfo.TemplateName, uberInfo.Line, uberInfo.Column);
throw new MethodInvocationException(message, ite.InnerException, vg.MethodName);
}
}
else
{
// no event cartridge to override. Just throw
String message = String.Format(
"Invocation of method '{0}' in {1}, template {2} Line {3} Column {4} threw an exception",
vg.MethodName, o != null ? o.GetType().FullName : "",
uberInfo.TemplateName, uberInfo.Line, uberInfo.Column);
throw new MethodInvocationException(message, ite.InnerException, vg.MethodName);
}
}
catch(ArgumentException)
{
return null;
}
catch(Exception e)
{
rsvc.Error("ASTIdentifier() : exception invoking method "
+ "for identifier '" + identifier + "' in "
+ o.GetType() + " : " + e);
}
return null;
}
public override object Execute(object o, IInternalContextAdapter context)
{
IVelPropertyGet velPropertyGet = null;
try
{
Type type = o.GetType();
IntrospectionCacheData introspectionCacheData = context.ICacheGet(this);
if (introspectionCacheData != null && introspectionCacheData.ContextData == type)
{
velPropertyGet = (IVelPropertyGet)introspectionCacheData.Thingy;
}
else
{
velPropertyGet = this.rsvc.Uberspect.GetPropertyGet(o, this.identifier, this.uberInfo);
if (velPropertyGet != null && velPropertyGet.Cacheable)
{
introspectionCacheData = new IntrospectionCacheData(type, velPropertyGet);
context.ICachePut(this, introspectionCacheData);
}
}
}
catch (System.Exception ex)
{
this.rsvc.Error(string.Concat(new object[]
{
"ASTIdentifier.execute() : identifier = ",
this.identifier,
" : ",
ex
}));
}
object result;
if (velPropertyGet == null)
{
result = null;
}
else
{
try
{
result = velPropertyGet.Invoke(o);
return(result);
}
catch (TargetInvocationException ex2)
{
EventCartridge eventCartridge = context.EventCartridge;
string message;
if (eventCartridge != null)
{
try
{
result = eventCartridge.HandleMethodException(o.GetType(), velPropertyGet.MethodName, ex2.InnerException);
return(result);
}
catch (System.Exception)
{
message = string.Format("Invocation of method '{0}' in {1}, template {2} Line {3} Column {4} threw an exception", new object[]
{
velPropertyGet.MethodName,
(o != null) ? o.GetType().FullName : "",
this.uberInfo.TemplateName,
this.uberInfo.Line,
this.uberInfo.Column
});
throw new MethodInvocationException(message, ex2.InnerException, velPropertyGet.MethodName);
}
}
message = string.Format("Invocation of method '{0}' in {1}, template {2} Line {3} Column {4} threw an exception", new object[]
{
velPropertyGet.MethodName,
(o != null) ? o.GetType().FullName : "",
this.uberInfo.TemplateName,
this.uberInfo.Line,
this.uberInfo.Column
});
throw new MethodInvocationException(message, ex2.InnerException, velPropertyGet.MethodName);
}
catch (ArgumentException)
{
result = null;
return(result);
}
catch (System.Exception ex)
{
this.rsvc.Error(string.Concat(new object[]
{
"ASTIdentifier() : exception invoking method for identifier '",
this.identifier,
"' in ",
o.GetType(),
" : ",
ex
}));
}
result = null;
}
return(result);
}
/// <seealso cref="NVelocity.Runtime.Paser.Node.SimpleNode.Execute(java.lang.Object, org.apache.velocity.context.InternalContextAdapter)">
/// </seealso>
public override object Execute(object o, IInternalContextAdapter context)
{
IVelPropertyGet vg = null;
try
{
/*
* first, see if we have this information cached.
*/
IntrospectionCacheData icd = context.ICacheGet(this);
/*
* if we have the cache data and the class of the object we are
* invoked with is the same as that in the cache, then we must
* be allright. The last 'variable' is the method name, and
* that is fixed in the template :)
*/
if (icd != null && (o != null) && (icd.ContextData == o.GetType()))
{
vg = (IVelPropertyGet)icd.Thingy;
}
else
{
/*
* otherwise, do the introspection, and cache it. Use the
* uberspector
*/
vg = rsvc.Uberspect.GetPropertyGet(o, identifier, uberInfo);
if (vg != null && vg.Cacheable && (o != null))
{
icd = new IntrospectionCacheData();
icd.ContextData = o.GetType();
icd.Thingy = vg;
context.ICachePut(this, icd);
}
}
}
/**
* pass through application level runtime exceptions
*/
catch (System.SystemException e)
{
throw e;
}
catch (System.Exception e)
{
string msg = "ASTIdentifier.Execute() : identifier = " + identifier;
log.Error(msg, e);
throw new VelocityException(msg, e);
}
/*
* we have no getter... punt...
*/
if (vg == null)
{
if (strictRef)
{
throw new MethodInvocationException("Object '" + o.GetType().FullName + "' does not contain property '" + identifier + "'", null, identifier, uberInfo.TemplateName, uberInfo.Line, uberInfo.Column);
}
else
{
return(null);
}
}
/*
* now try and Execute. If we Get a MIE, throw that
* as the app wants to Get these. If not, Log and punt.
*/
try
{
return(vg.Invoke(o));
}
catch (System.Reflection.TargetInvocationException ite)
{
/*
* if we have an event cartridge, see if it wants to veto
* also, let non-Exception Throwables go...
*/
System.Exception t = ite.GetBaseException();
if (t is System.Exception)
{
try
{
return(EventHandlerUtil.MethodException(rsvc, context, o.GetType(), vg.MethodName, (System.Exception)t));
}
/**
* If the event handler throws an exception, then wrap it
* in a MethodInvocationException. Don't pass through RuntimeExceptions like other
* similar catchall code blocks.
*/
catch (System.Exception)
{
throw new MethodInvocationException("Invocation of method '" + vg.MethodName + "'" + " in " + o.GetType() + " threw exception " + ite.GetBaseException().ToString(), ite.GetBaseException(), vg.MethodName, TemplateName, this.Line, this.Column);
}
}
else
{
/*
* no event cartridge to override. Just throw
*/
throw new MethodInvocationException("Invocation of method '" + vg.MethodName + "'" + " in " + o.GetType() + " threw exception " + ite.GetBaseException().ToString(), ite.GetBaseException(), vg.MethodName, TemplateName, this.Line, this.Column);
}
}
catch (System.ArgumentException)
{
return(null);
}
/**
* pass through application level runtime exceptions
*/
catch (System.SystemException e)
{
throw e;
}
catch (System.Exception e)
{
string msg = "ASTIdentifier() : exception invoking method " + "for identifier '" + identifier + "' in " + o.GetType();
log.Error(msg, e);
throw new VelocityException(msg, e);
}
}
private IEnumerator GetIterator(IInternalContextAdapter context, INode node)
{
object obj = node.GetChild(2).Value(context);
IEnumerator result;
if (obj == null)
{
result = null;
}
else
{
Foreach.EnumType enumType = Foreach.EnumType.Unknown;
IntrospectionCacheData introspectionCacheData = context.ICacheGet(this);
Type type = obj.GetType();
if (introspectionCacheData != null && introspectionCacheData.ContextData == type)
{
enumType = (Foreach.EnumType)introspectionCacheData.Thingy;
}
if (enumType == Foreach.EnumType.Unknown)
{
if (obj.GetType().IsArray)
{
enumType = Foreach.EnumType.Array;
}
else if (obj is IDictionary)
{
enumType = Foreach.EnumType.Dictionary;
}
else if (obj is ICollection)
{
enumType = Foreach.EnumType.Collection;
}
else if (obj is IEnumerable)
{
enumType = Foreach.EnumType.Enumerable;
}
else if (obj is IEnumerator)
{
enumType = Foreach.EnumType.Enumeration;
}
if (enumType != Foreach.EnumType.Unknown)
{
introspectionCacheData = new IntrospectionCacheData(type, enumType);
context.ICachePut(this, introspectionCacheData);
}
}
switch (enumType)
{
case Foreach.EnumType.Array:
result = ((Array)obj).GetEnumerator();
return(result);
case Foreach.EnumType.Dictionary:
result = ((IDictionary)obj).GetEnumerator();
return(result);
case Foreach.EnumType.Collection:
result = ((ICollection)obj).GetEnumerator();
return(result);
case Foreach.EnumType.Enumeration:
this.rsvc.Warn(string.Concat(new object[]
{
"Warning! The reference ",
node.GetChild(2).FirstToken.Image,
" is an Enumeration in the #foreach() loop at [",
base.Line,
",",
base.Column,
"] in template ",
context.CurrentTemplateName,
". Because it's not resetable, if used in more than once, this may lead to unexpected results."
}));
result = (IEnumerator)obj;
return(result);
case Foreach.EnumType.Enumerable:
result = ((IEnumerable)obj).GetEnumerator();
return(result);
}
this.rsvc.Warn(string.Concat(new object[]
{
"Could not determine type of enumerator (",
obj.GetType().Name,
") in #foreach loop for ",
node.GetChild(2).FirstToken.Image,
" at [",
base.Line,
",",
base.Column,
"] in template ",
context.CurrentTemplateName
}));
result = null;
}
return(result);
}
/// <seealso cref="org.apache.velocity.context.InternalHousekeepingContext.icacheGet(java.lang.Object)">
/// </seealso>
public virtual IntrospectionCacheData ICacheGet(object key)
{
return(innerContext.ICacheGet(key));
}
/// <summary>
/// returns an Iterator to the collection in the #foreach()
/// </summary>
/// <param name="context"> current context </param>
/// <param name="node"> AST node </param>
/// <returns>Iterator to do the dataset </returns>
private IEnumerator GetIterator(IInternalContextAdapter context, INode node)
{
// get our list object, and punt if it's null.
Object listObject = node.GetChild(2).Value(context);
if (listObject == null)
return null;
// See if we already know what type this is.
// Use the introspection cache
EnumType type = EnumType.Unknown;
IntrospectionCacheData icd = context.ICacheGet(this);
Type c = listObject.GetType();
// if we have an entry in the cache, and the Class we have
// cached is the same as the Class of the data object
// then we are ok
if (icd != null && icd.ContextData == c)
{
// dig the type out of the cata object
type = ((EnumType) icd.Thingy);
}
// If we still don't know what this is,
// figure out what type of object the list
// element is, and get the iterator for it
if (type == EnumType.Unknown)
{
if (listObject.GetType().IsArray)
type = EnumType.Array;
else if (listObject is IDictionary)
type = EnumType.Dictionary;
else if (listObject is ICollection)
type = EnumType.Collection;
else if (listObject is IEnumerable)
type = EnumType.Enumerable;
else if (listObject is IEnumerator)
type = EnumType.Enumeration;
// if we did figure it out, cache it
if (type != EnumType.Unknown)
{
icd = new IntrospectionCacheData(c, type);
context.ICachePut(this, icd);
}
}
// now based on the type from either cache or examination...
switch(type)
{
case EnumType.Collection:
return ((ICollection) listObject).GetEnumerator();
case EnumType.Enumerable:
return ((IEnumerable) listObject).GetEnumerator();
case EnumType.Enumeration:
rsvc.Warn("Warning! The reference " + node.GetChild(2).FirstToken.Image +
" is an Enumeration in the #foreach() loop at [" + Line + "," + Column + "]" + " in template " +
context.CurrentTemplateName + ". Because it's not resetable," +
" if used in more than once, this may lead to" + " unexpected results.");
return (IEnumerator) listObject;
case EnumType.Array:
return ((Array) listObject).GetEnumerator();
case EnumType.Dictionary:
return ((IDictionary) listObject).GetEnumerator();
default:
/* we have no clue what this is */
rsvc.Warn("Could not determine type of enumerator (" + listObject.GetType().Name + ") in " + "#foreach loop for " +
node.GetChild(2).FirstToken.Image + " at [" + Line + "," + Column + "]" + " in template " +
context.CurrentTemplateName);
return null;
}
}