/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
package org.apache.tools.ant.types.resources.selectors;

import java.util.Iterator;

import org.apache.tools.ant.types.Resource;

/**
 * None ResourceSelector.
 * @since Ant 1.7
 */
public class None
    extends ResourceSelectorContainer implements ResourceSelector {

    /**
     * Default constructor.
     */
    public None() {
    }

    /**
     * Convenience constructor.
     * @param r the ResourceSelector[] to add.
     */
    public None(ResourceSelector[] r) {
        super(r);
    }

    /**
     * Return true if this Resource is selected.
     * @param r the Resource to check.
     * @return whether the Resource was selected.
     */
    public boolean isSelected(Resource r) {
        boolean none = true;
        for (Iterator i = getSelectors(); none && i.hasNext();) {
            none = !((ResourceSelector) i.next()).isSelected(r);
        }
        return none;
    }

}