AbstractFunctionInterp.java 

/*
 * Copyright (c) 2005, Regents of the University of California
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.  
 *
 * * Neither the name of the University of California, Berkeley nor
 *   the names of its contributors may be used to endorse or promote
 *   products derived from this software without specific prior 
 *   written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package blog;

import java.util.*;
Abstract implementation of FunctionInterp including a getInverseTuples method that always returns null. 


public abstract class AbstractFunctionInterp implements FunctionInterp {
Returns the set of argument tuples that yield the given value, if this set is finite and can be computed easily. Otherwise returns null.

This default implementation just returns null.

Returns:  Set of List of objects 


    public Set getInverseTuples(Object value) {
	return null;
    }
Returns the set of values for argument argIndex that, in combination with the given values for the other arguments, yield the given function value. If this set cannot be computed straightforwardly, returns null.

This default implementation calls getInverseTuples(value), and if it gets a non-null result, it searches the resulting set for tuples that match args except on argIndex. It returns a set consisting of the values at index argIndex in those tuples. is ignored be returned

Parameters: 
args - tuple of arguments; the entry at argIndex
argIndex - index of argument whose possible values are to
argType - type of the argument at index argIndex
value - value of this function


    public Set getInverseArgs(List args, int argIndex, Type argType, 
			      Object value) {
	Set inverseTuples = getInverseTuples(value);
	if (inverseTuples == null) {
	    return null;
	}

	Set inverseArgs = new HashSet();
	for (Iterator iter = inverseTuples.iterator(); iter.hasNext(); ) {
	    List tuple = (List) iter.next();
	    if (tuple.subList(0, argIndex).equals(args.subList(0, argIndex))
		&& (tuple.subList(argIndex + 1, tuple.size())
		    .equals(args.subList(argIndex + 1, args.size())))) {
		inverseArgs.add(tuple.get(argIndex));
	    }
	}
	return inverseArgs;
    }
}

This file was generated on Tue Jun 08 17:53:35 PDT 2010 from file AbstractFunctionInterp.java
by the ilog.language.tools.Hilite Java tool written by Hassan Aït-Kaci