/*
 * 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.*;
import common.Multiset;

public class CardinalitySpec extends ArgSpec {
    

    public CardinalitySpec(ImplicitSetSpec setSpec) {
	this.setSpec = setSpec;
    }

    public ImplicitSetSpec getSetSpec() {
	return setSpec;
    }

    public Object evaluate(EvalContext context) {
	context.pushEvaluee(this);

	// Note that we don't evaluate the underlying ImplicitSetSpec, 
	// because that requires the elements of the set to be determined.  
	// We only care about the size of the set.  
	ObjectSet set = (ObjectSet) setSpec.getSatisfierSpec()
	    .elementSet(context);
	Integer result = null;
	if (set.canDetermineSize()) {
	    result = new Integer(set.size());
	}

	context.popEvaluee();
	return result;
    }

    public boolean containsRandomSymbol() {
	return true; // the type symbol
    }

    public boolean checkTypesAndScope(Model model, Map scope) {
	return setSpec.checkTypesAndScope(model, scope);
    }

    

    public int compile(LinkedHashSet callStack) {
	callStack.add(this);
	int errors = setSpec.compile(callStack);
	callStack.remove(this);
	return errors;
    }

    public boolean isNumeric() {
	return true;
    }

    public Collection getSubExprs() {
	return Collections.singletonList(setSpec);
    }

    public ArgSpec getSubstResult(Substitution subst, 
				  Set<LogicalVar> boundVars) {
	return new CardinalitySpec
	    ((ImplicitSetSpec) setSpec.getSubstResult(subst, boundVars));
    }

    public boolean equals(Object o) {
	if (o instanceof CardinalitySpec) {
	    CardinalitySpec other = (CardinalitySpec) o;
	    return setSpec.equals(other.getSetSpec());
	}
	return false;
    }

    public int hashCode() {
	return setSpec.hashCode();
    }

    public String toString() {
	return ("#" + setSpec);
    }

    private ImplicitSetSpec setSpec;
}

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