ListInterp.java 

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package blog.distrib;

import java.util.*;
import blog.AbstractFunctionInterp;
An interpretation for a Boolean function symbol, specified by a list of tuples for which the function returns true. The first parameter to ListInterp is the arity of the tuples, i.e., the number of arguments to the function. If the arity is k, then the remaining parameters are interpreted in groups of k, as k-tuples for which the function returns true. The function returns false for all other tuples. 


public class ListInterp extends AbstractFunctionInterp {
Creates a new ListInterp object with an empty list of tuples on which the function returns true. 


    public ListInterp(int arity) {
	this.arity = arity;
    }
Creates a new ListInterp object with a specified list of tuples on which the function returns true. whose remaining elements are interpreted in groups of k, as tuples of function arguments.

Parameters: 
params - List whose first element is an Integer k, and


    public ListInterp(List params) {
	if (params.isEmpty() || !(params.get(0) instanceof Integer)) {
	    throw new IllegalArgumentException
		("First parameter to ListInterp must be an integer "
		 + "specifying the number of elements in each tuple.");
	}
	arity = ((Integer) params.get(0)).intValue();

	if (arity <= 0) {
	    throw new IllegalArgumentException
		("Function specified by ListInterp must take at least 1 "
		 + "argument, not " + arity + ".  (For zero-ary functions, "
		 + "just use, e.g., \"nonrandom Integer C = 17;\", with no "
		 + "parentheses after C.)");
	}

	if ((params.size() - 1) % arity != 0) {
	    throw new IllegalArgumentException
		("ListInterp initialized with arity " + arity  
		 + ", but number of remaining parameters is not a "
		 + "multiple of " + arity);
	}

	for (int i = 1; i < params.size(); i += arity) {
	    List args = params.subList(i, i + arity);
	    //System.out.println(args);
	    tuples.add(args);
	}
    }
Adds the given argument tuple to the list of tuples on which the function returns true. Does nothing if the tuple is already in the list. does not equal the arity passed to this object's constructor

Throws:  IllegalArgumentException if the size of args 


    public void add(List args) {
	if (args.size() != arity) {
	    throw new IllegalArgumentException
		("Extension of relation with arity " + arity 
		 + " can't include argument tuple: " + args);
	}
	tuples.add(args);
    }

    public Object getValue(List args) {
	if (args.size() != arity) {
	    throw new IllegalArgumentException
		("ListInterp expected argument tuples of arity " + arity 
		 + ", got one of arity " + args.size());
	}
	return Boolean.valueOf(tuples.contains(args));
    }

    public Set getInverseTuples(Object value) {
	if ((value instanceof Boolean) && ((Boolean) value).booleanValue()) {
	    return Collections.unmodifiableSet(tuples);
	}
	return null;
    }

    private int arity;
    private Set tuples = new HashSet(); // of List
}

This file was generated on Tue Jun 08 17:53:47 PDT 2010 from file ListInterp.java
by the ilog.language.tools.Hilite Java tool written by Hassan Aït-Kaci