package net.toodarkpark.util.comparison;

import java.util.*;
import org.apache.commons.collections.Predicate;

/*
 * Combine multiple Predicates into one.
 */

public class AndPredicate implements Predicate
{
    protected Collection qualifiers;
    
    private AndPredicate()
    {
        super();
        qualifiers = null;
    }
    
    public AndPredicate( Collection list )
    {
        this();
        qualifiers = list;
    }
    
    public boolean evaluate( Object obj )
    {
        Iterator iterator = qualifiers.iterator();
        
        while( iterator.hasNext() )
        {
            Predicate currentQualif = (Predicate)iterator.next();
            
            // keep comparing until we get a false return value.
            if( currentQualif.evaluate( obj ) == false )
            {
                return false;
            }
        }
        
        // we're done comparing; the objects match!
        return true;
    }
}