// HTMLParser Library $Name: v1_6_20060319 $ - A java-based parser for HTML
// http://sourceforge.org/projects/htmlparser
// Copyright (C) 2003 Derrick Oswald
//
// Revision Control Information
//
// $Source: /cvsroot/htmlparser/htmlparser/src/org/htmlparser/filters/AndFilter.java,v $
// $Author: derrickoswald $
// $Date: 2005/06/14 10:37:33 $
// $Revision: 1.4 $
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
package org.htmlparser.filters;
import org.htmlparser.Node;
import org.htmlparser.NodeFilter;
/**
* Accepts nodes matching all of it's predicate filters (AND operation).
*/
public class AndFilter
implements
NodeFilter
{
/**
* The predicates that are to be and'ed together;
*/
protected NodeFilter[] mPredicates;
/**
* Creates a new instance of an AndFilter.
* With no predicates, this would always answer <code>true</code>
* to {@link #accept}.
* @see #setPredicates
*/
public AndFilter ()
{
setPredicates (null);
}
/**
* Creates an AndFilter that accepts nodes acceptable to both filters.
* @param left One filter.
* @param right The other filter.
*/
public AndFilter (NodeFilter left, NodeFilter right)
{
NodeFilter[] predicates;
predicates = new NodeFilter[2];
predicates[0] = left;
predicates[1] = right;
setPredicates (predicates);
}
/**
* Get the predicates used by this AndFilter.
* @return The predicates currently in use.
*/
public NodeFilter[] getPredicates ()
{
return (mPredicates);
}
/**
* Set the predicates for this AndFilter.
* @param predicates The list of predidcates to use in {@link #accept}.
*/
public void setPredicates (NodeFilter[] predicates)
{
if (null == predicates)
predicates = new NodeFilter[0];
mPredicates = predicates;
}
//
// NodeFilter interface
//
/**
* Accept nodes that are acceptable to all of it's predicate filters.
* @param node The node to check.
* @return <code>true</code> if all the predicate filters find the node
* is acceptable, <code>false</code> otherwise.
*/
public boolean accept (Node node)
{
boolean ret;
ret = true;
for (int i = 0; ret && (i < mPredicates.length); i++)
if (!mPredicates[i].accept (node))
ret = false;
return (ret);
}
}