SkolemConstant.java 

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package blog;

import java.util.*;
Represents a skolem constant -- a constant introduced by symbol evidence statements.

See also:  SymbolEvidenceStatement 


public class SkolemConstant extends RandomFunction {
Creates a new SkolemConstant with the given name and return type. The dependency model is created automatically. this SkolemConstant's value is chosen listed earlier in the same symbol evidence statement

Parameters: 
name - String representation of the SkolemConstant
setSpec - specification for set of objects from which
predecessors - List of SkolemConstant objects that are


    public SkolemConstant(String name, ImplicitSetSpec setSpec, 
			  List predecessors){
	super(name, Collections.EMPTY_LIST, setSpec.getType(), null);
        
	// Create formula that excludes objects denoted by the predecessors 
	// from the set of eligible objects
	LogicalVar x = setSpec.getGenericSetElt();
	Formula cond = setSpec.getCond();
	for (Iterator iter = predecessors.iterator(); iter.hasNext(); ) {
	    SkolemConstant pred = (SkolemConstant) iter.next();
	    Term predTerm = new FuncAppTerm(pred, Collections.EMPTY_LIST);
	    Formula eq = new EqualityFormula(x, predTerm);
	    cond = new ConjFormula(cond, new NegFormula(eq));
	}

	// Create dependency model that selects uniformly from objects 
	// that satisfy this new formula

	ImplicitSetSpec newSetSpec = new ImplicitSetSpec(x, cond);
	List cpdArgs = new ArrayList();
	cpdArgs.add(newSetSpec);

	Clause clause = new Clause(TrueFormula.TRUE, 
				   new blog.distrib.UniformChoice(),
				   cpdArgs);
	List clauseList = new ArrayList();
	clauseList.add(clause);

	setArgVars(Collections.EMPTY_LIST); // no arguments
	setDepModel(new DependencyModel(clauseList, setSpec.getType(), 
					Model.NULL));
    }
}

This file was generated on Tue Jun 08 17:53:36 PDT 2010 from file SkolemConstant.java
by the ilog.language.tools.Hilite Java tool written by Hassan Aït-Kaci