internal static IEnumerator ConvertAnythingToIterator(object o)
{
IEnumerator iter = null;
if (o is IDictionary)
{
iter = ((IDictionary) o).Values.GetEnumerator();
}
else if (o is ICollection)
{
iter = ((ICollection) o).GetEnumerator();
}
else if (o is IEnumerator)
{
iter = (IEnumerator) o;
}
if (iter == null)
{
IList singleton = new StringTemplate.STAttributeList(1);
singleton.Add(o);
return singleton.GetEnumerator();
}
return iter;
}
// HELP ROUTINES CALLED BY EVALUATOR TREE WALKER
/// <summary>
/// For <names,phones:{n,p | ...}> treat the names, phones as lists
/// to be walked in lock step as n=names[i], p=phones[i].
/// </summary>
public virtual object ApplyTemplateToListOfAttributes(StringTemplate self, IList attributes, StringTemplate templateToApply)
{
if (attributes == null || templateToApply == null || attributes.Count == 0)
{
return null; // do not apply if missing templates or empty values
}
IDictionary argumentContext = null;
IList results = new StringTemplate.STAttributeList();
// convert all attributes to iterators even if just one value
for (int a = 0; a < attributes.Count; a++)
{
object o = (object) attributes[a];
if (o != null)
{
o = ConvertAnythingToIterator(o);
attributes[a] = o; // alter the list in place
}
}
int numAttributes = attributes.Count;
// ensure arguments line up
HashList formalArguments = (HashList) templateToApply.FormalArguments;
if (formalArguments == null || formalArguments.Count == 0)
{
self.Error("missing arguments in anonymous" + " template in context " + self.GetEnclosingInstanceStackString());
return null;
}
object[] formalArgumentNames = new object[formalArguments.Count];
formalArguments.Keys.CopyTo(formalArgumentNames, 0);
if (formalArgumentNames.Length != numAttributes)
{
self.Error("number of arguments " + formalArguments.Keys.ToString() + " mismatch between attribute list and anonymous" + " template in context " + self.GetEnclosingInstanceStackString());
// truncate arg list to match smaller size
int shorterSize = Math.Min(formalArgumentNames.Length, numAttributes);
numAttributes = shorterSize;
object[] newFormalArgumentNames = new object[shorterSize];
Array.Copy(formalArgumentNames, 0, newFormalArgumentNames, 0, shorterSize);
formalArgumentNames = newFormalArgumentNames;
}
// keep walking while at least one attribute has values
int i = 0; // iteration number from 0
while (true)
{
argumentContext = new Hashtable();
// get a value for each attribute in list; put into arg context
// to simulate template invocation of anonymous template
int numEmpty = 0;
for (int a = 0; a < numAttributes; a++)
{
IEnumerator it = (IEnumerator) attributes[a];
if ((it != null) && it.MoveNext())
{
string argName = (string) formalArgumentNames[a];
object iteratedValue = it.Current;
argumentContext[argName] = iteratedValue;
}
else
{
numEmpty++;
}
}
if (numEmpty == numAttributes)
{
break;
}
argumentContext[DEFAULT_INDEX_VARIABLE_NAME] = i+1;
argumentContext[DEFAULT_INDEX0_VARIABLE_NAME] = i;
StringTemplate embedded = templateToApply.GetInstanceOf();
embedded.EnclosingInstance = self;
embedded.ArgumentContext = argumentContext;
results.Add(embedded);
i++;
}
return results;
}
public virtual object ApplyListOfAlternatingTemplates(StringTemplate self, object attributeValue, IList templatesToApply)
{
if (attributeValue == null || templatesToApply == null || templatesToApply.Count == 0)
{
return null; // do not apply if missing templates or empty value
}
StringTemplate embedded = null;
IDictionary argumentContext = null;
// normalize collections and such to use iterators
// anything iteratable can be used for "APPLY"
// TODO: 2006-08-05 - Needed?: attributeValue = convertArrayToList(attributeValue);
attributeValue = ConvertAnythingIteratableToIterator(attributeValue);
bool isAnonymous;
bool hasFormalArgument;
if (attributeValue is IEnumerator)
{
// results can be treated list an attribute, indicate ST created list
IList resultVector = new StringTemplate.STAttributeList();
IEnumerator iter = (IEnumerator) attributeValue;
int i = 0;
while (iter.MoveNext())
{
object ithValue = iter.Current;
if (ithValue == null)
{
if (nullValue == null)
{
continue;
}
ithValue = nullValue;
}
int templateIndex = i % templatesToApply.Count; // rotate through
embedded = (StringTemplate) templatesToApply[templateIndex];
// template to apply is an actual StringTemplate (created in
// eval.g), but that is used as the examplar. We must create
// a new instance of the embedded template to apply each time
// to get new attribute sets etc...
StringTemplateAST args = embedded.ArgumentsAST;
embedded = embedded.GetInstanceOf(); // make new instance
embedded.EnclosingInstance = self;
embedded.ArgumentsAST = args;
argumentContext = new Hashtable();
isAnonymous = (embedded.Name == StringTemplate.ANONYMOUS_ST_NAME);
IDictionary formalArgs = embedded.FormalArguments;
SetSoleFormalArgumentToIthValue(embedded, argumentContext, ithValue);
hasFormalArgument = ((formalArgs != null) && (formalArgs.Count > 0));
// if it's an anonymous template with a formal arg, don't set it/attr
if ( !(isAnonymous && hasFormalArgument) )
{
argumentContext[DEFAULT_ATTRIBUTE_NAME] = ithValue;
argumentContext[DEFAULT_ATTRIBUTE_NAME_DEPRECATED] = ithValue;
}
argumentContext[DEFAULT_INDEX_VARIABLE_NAME] = (i + 1);
argumentContext[DEFAULT_INDEX0_VARIABLE_NAME] = i;
embedded.ArgumentContext = argumentContext;
EvaluateArguments(embedded);
/*
System.err.println("i="+i+": applyTemplate("+embedded.getName()+
", args="+argumentContext+
" to attribute value "+ithValue);
*/
resultVector.Add(embedded);
i++;
}
if (resultVector.Count == 0)
{
resultVector = null;
}
return resultVector;
}
else
{
/*
System.out.println("setting attribute "+DEFAULT_ATTRIBUTE_NAME+" in arg context of "+
embedded.getName()+
" to "+attributeValue);
*/
embedded = (StringTemplate) templatesToApply[0];
argumentContext = new Hashtable();
IDictionary formalArgs = embedded.FormalArguments;
SetSoleFormalArgumentToIthValue(embedded, argumentContext, attributeValue);
isAnonymous = (embedded.Name == StringTemplate.ANONYMOUS_ST_NAME);
hasFormalArgument = ((formalArgs != null) && (formalArgs.Count > 0));
// if it's an anonymous template with a formal arg, don't set it/attr
if ( !(isAnonymous && hasFormalArgument) )
{
argumentContext[DEFAULT_ATTRIBUTE_NAME] = attributeValue;
argumentContext[DEFAULT_ATTRIBUTE_NAME_DEPRECATED] = attributeValue;
}
argumentContext[DEFAULT_INDEX_VARIABLE_NAME] = 1;
argumentContext[DEFAULT_INDEX0_VARIABLE_NAME] = 0;
embedded.ArgumentContext = argumentContext;
EvaluateArguments(embedded);
return embedded;
}
}
/** <summary>
* For <names,phones:{n,p | ...}> treat the names, phones as lists
* to be walked in lock step as n=names[i], p=phones[i].
* </summary>
*/
public virtual object ApplyTemplateToListOfAttributes( StringTemplate self,
IList attributes,
StringTemplate templateToApply )
{
if ( attributes == null || templateToApply == null || attributes.Count == 0 )
{
return null; // do not apply if missing templates or empty values
}
Dictionary<string, object> argumentContext = null;
// indicate it's an ST-created list
var results = new StringTemplate.STAttributeList();
// convert all attributes to iterators even if just one value
for ( int a = 0; a < attributes.Count; a++ )
{
object o = attributes[a];
if ( o != null )
{
o = ConvertAnythingToIterator( o );
attributes[a] = o; // alter the list in place
}
}
int numAttributes = attributes.Count;
// ensure arguments line up
var formalArguments = templateToApply.FormalArguments;
if ( formalArguments == null || formalArguments.Count == 0 )
{
self.Error( "missing arguments in anonymous" +
" template in context " + self.GetEnclosingInstanceStackString() );
return null;
}
string[] formalArgumentNames = formalArguments.Select( fa => fa.name ).ToArray();
if ( formalArgumentNames.Length != numAttributes )
{
string formalArgumentsText = formalArguments.Select( fa => fa.name ).ToList().ToElementString();
self.Error( "number of arguments " + formalArgumentsText +
" mismatch between attribute list and anonymous" +
" template in context " + self.GetEnclosingInstanceStackString() );
// truncate arg list to match smaller size
int shorterSize = Math.Min( formalArgumentNames.Length, numAttributes );
numAttributes = shorterSize;
string[] newFormalArgumentNames = new string[shorterSize];
Array.Copy( formalArgumentNames, 0,
newFormalArgumentNames, 0,
shorterSize );
formalArgumentNames = newFormalArgumentNames;
}
// keep walking while at least one attribute has values
int i = 0; // iteration number from 0
for ( ; ; )
{
argumentContext = new Dictionary<string, object>();
// get a value for each attribute in list; put into arg context
// to simulate template invocation of anonymous template
int numEmpty = 0;
for ( int a = 0; a < numAttributes; a++ )
{
Iterator it = attributes[a] as Iterator;
if ( it != null && it.hasNext() )
{
string argName = formalArgumentNames[a];
object iteratedValue = it.next();
argumentContext[argName] = iteratedValue;
}
else
{
numEmpty++;
}
}
if ( numEmpty == numAttributes )
{
break;
}
argumentContext[DefaultIndexVariableName] = i + 1;
argumentContext[DefaultIndex0VariableName] = i;
StringTemplate embedded = templateToApply.GetInstanceOf();
embedded.EnclosingInstance = self;
embedded.ArgumentContext = argumentContext;
results.Add( embedded );
i++;
}
return results;
}
public virtual object ApplyListOfAlternatingTemplates( StringTemplate self,
object attributeValue,
IList<StringTemplate> templatesToApply )
{
if ( attributeValue == null || templatesToApply == null || templatesToApply.Count == 0 )
{
return null; // do not apply if missing templates or empty value
}
StringTemplate embedded = null;
Dictionary<string, object> argumentContext = null;
// normalize collections and such to use iterators
// anything iteratable can be used for "APPLY"
attributeValue = ConvertArrayToList( attributeValue );
attributeValue = ConvertAnythingIteratableToIterator( attributeValue );
Iterator iter = attributeValue as Iterator;
if ( iter != null )
{
// results can be treated list an attribute, indicate ST created list
var resultVector = new StringTemplate.STAttributeList();
int i = 0;
while ( iter.hasNext() )
{
object ithValue = iter.next();
if ( ithValue == null )
{
if ( _nullValue == null )
{
continue;
}
ithValue = _nullValue;
}
int templateIndex = i % templatesToApply.Count; // rotate through
embedded = templatesToApply[templateIndex];
// template to apply is an actual StringTemplate (created in
// eval.g), but that is used as the examplar. We must create
// a new instance of the embedded template to apply each time
// to get new attribute sets etc...
StringTemplateAST args = embedded.ArgumentsAST;
embedded = embedded.GetInstanceOf(); // make new instance
embedded.EnclosingInstance = self;
embedded.ArgumentsAST = args;
argumentContext = new Dictionary<string, object>();
var formalArgs = embedded.FormalArguments;
bool isAnonymous =
embedded.Name == StringTemplate.ANONYMOUS_ST_NAME;
SetSoleFormalArgumentToIthValue( embedded, argumentContext, ithValue );
// if it's an anonymous template with a formal arg, don't set it/attr
if ( !( isAnonymous && formalArgs != null && formalArgs.Count > 0 ) )
{
argumentContext[DefaultAttributeName] = ithValue;
argumentContext[DefaultAttributeNameDeprecated] = ithValue;
}
argumentContext[DefaultIndexVariableName] = i + 1;
argumentContext[DefaultIndex0VariableName] = i;
embedded.ArgumentContext = argumentContext;
EvaluateArguments( embedded );
/*
System.err.println("i="+i+": applyTemplate("+embedded.getName()+
", args="+argumentContext+
" to attribute value "+ithValue);
*/
resultVector.Add( embedded );
i++;
}
if ( resultVector.Count == 0 )
{
resultVector = null;
}
return resultVector;
}
else
{
/*
System.out.println("setting attribute "+DEFAULT_ATTRIBUTE_NAME+" in arg context of "+
embedded.getName()+
" to "+attributeValue);
*/
embedded = templatesToApply[0];
argumentContext = new Dictionary<string, object>();
var formalArgs = embedded.FormalArguments;
StringTemplateAST args = embedded.ArgumentsAST;
SetSoleFormalArgumentToIthValue( embedded, argumentContext, attributeValue );
bool isAnonymous =
embedded.Name == StringTemplate.ANONYMOUS_ST_NAME;
// if it's an anonymous template with a formal arg, don't set it/attr
if ( !( isAnonymous && formalArgs != null && formalArgs.Count > 0 ) )
{
argumentContext[DefaultAttributeName] = attributeValue;
argumentContext[DefaultAttributeNameDeprecated] = attributeValue;
}
argumentContext[DefaultIndexVariableName] = 1;
argumentContext[DefaultIndex0VariableName] = 0;
embedded.ArgumentContext = argumentContext;
EvaluateArguments( embedded );
return embedded;
}
}
protected static Iterator ConvertAnythingToIterator( object o )
{
o = ConvertAnythingIteratableToIterator( o );
Iterator iter = o as Iterator;
if ( iter != null )
return iter;
var singleton = new StringTemplate.STAttributeList( 1 );
singleton.Add( o );
return singleton.iterator();
}