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/* FIXME: finer imports. */
import java.util.*;
import kodkod.ast.*;
import kodkod.instance.*;
public class VariableManager
{
private final Map<String, Expression> from_string;
private final Map<String, TaggedVariable> tagged_variables;
private int next_id;
public VariableManager (final String var_prefix)
{
from_string = new HashMap<String, Expression>();
tagged_variables = new HashMap<String, TaggedVariable>();
}
private String generate_new_anonymous_variable_name ()
{
final String result;
result = "_var" + next_id;
next_id += 1;
return result;
}
public void add_tag
(
final String var_name,
final String var_type,
final String tag_name
)
throws Exception
{
final TaggedVariable tg;
System.out.println("[D] Skolemizing: " + var_name);
if (from_string.containsKey(var_name))
{
throw
new Exception
(
"[F] Invalid property: the variable name \""
+ var_name
+ "\" is bound multiple times in the \"tag_existing\""
+ " operator."
);
}
tg = new TaggedVariable(var_name, var_type, tag_name);
from_string.put(var_name, tg.as_relation);
tagged_variables.put(var_name, tg);
}
public Variable add_variable (final String var_name)
throws Exception
{
final Variable result;
if (from_string.containsKey(var_name))
{
throw
new Exception
(
"[F] Invalid property: the variable name \""
+ var_name
+ "\" is declared multiple times."
);
}
result = Variable.unary(var_name);
from_string.put(var_name, result);
return result;
}
public Expression get_variable (final String var_name)
throws Exception
{
final Expression result;
result = from_string.get(var_name);
if (result == null)
{
throw
new Exception
(
"[F] Variable \""
+ var_name
+ "\" is used, but not declared."
);
}
return result;
}
public Variable generate_new_anonymous_variable ()
{
return Variable.unary(generate_new_anonymous_variable_name());
}
public void add_tagged_variables_to_bounds
(
final Bounds b,
final TupleFactory f
)
{
for (final TaggedVariable tg: tagged_variables.values())
{
b.bound
(
tg.as_relation,
f.setOf(new Object[0]),
f.setOf
(
Main.get_model().get_type
(
tg.type
).get_all_members_as_atoms().toArray()
)
);
}
}
public Formula generate_tagged_variable_constraints ()
{
Formula result;
result = Formula.TRUE;
for (final TaggedVariable tg: tagged_variables.values())
{
result = result.and(tg.as_relation.one());
}
return result;
}
private static class TaggedVariable
{
private final String name;
private final String type;
private final String tag;
private final Relation as_relation;
private TaggedVariable
(
final String name,
final String type,
final String tag
)
{
this.name = name;
this.type = type;
this.tag = tag;
as_relation = Relation.unary(name);
}
}
}
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