/**
* @see parser.IDLParserVisitor#visit(ASTcasex, Object)
*/
public Object visit(ASTcasex node, Object data) {
if (!(data is UnionBuildInfo)) {
throw new InternalCompilerException("invalid parameter in visit ASTswitch_body");
}
UnionBuildInfo buildInfo = (UnionBuildInfo)data;
// REFACTORING possiblity: replace direct use of values by using the Literals
// case node consists of one or more case-labels followed by an element spec
// collect the data for this switch-case
object[] discriminatorValues = CollectDiscriminatorValuesForCase(node,
buildInfo.GetGenerationHelper().DiscriminatorType,
buildInfo);
ASTelement_spec elemSpec = (ASTelement_spec)node.jjtGetChild(node.jjtGetNumChildren() - 1);
ASTtype_spec typeSpecNode = (ASTtype_spec)elemSpec.jjtGetChild(0);
TypeContainer elemType = (TypeContainer)typeSpecNode.jjtAccept(this, buildInfo);
if (elemType == null) {
throw new InvalidIdlException(
String.Format("union elem type not defined for {0}",
node.GetIdentification()));
}
elemType = ReplaceByCustomMappedIfNeeded(elemType);
Node elemDecl = elemSpec.jjtGetChild(1);
string elemDeclIdent =
DetermineTypeAndNameForDeclarator((ASTdeclarator)elemDecl, data,
ref elemType);
// generate the methods/field for this switch-case
buildInfo.GetGenerationHelper().GenerateSwitchCase(elemType, elemDeclIdent, discriminatorValues);
return null;
}
/// <summary>helper methods to collect discriminator values for casex node; checks if const-type is ok</summary>
private object[] CollectDiscriminatorValuesForCase(ASTcasex node, TypeContainer discrType,
BuildInfo unionInfo) {
object[] result = new object[node.jjtGetNumChildren() - 1];
for (int i = 0; i < node.jjtGetNumChildren() - 1; i++) {
if (!((ASTcase_label)node.jjtGetChild(i)).isDefault()) {
Literal litVal = ((Literal)node.jjtGetChild(i).jjtAccept(this, unionInfo));
if (litVal == null) {
throw new InvalidIdlException(
String.Format("invalid {0}, discrimitator value for case not retrievable",
node.GetIdentification()));
}
// check if val ok ...
CheckDiscrValAssignableToDiscrType(litVal, discrType);
result[i] = litVal.GetValue();
} else {
// default case
result[i] = UnionGenerationHelper.DefaultCaseDiscriminator;
}
}
return result;
}