package org.apache.maven.shared.dependency.tree.filter;

/*
 * 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.
 */

import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.apache.maven.shared.dependency.tree.DependencyNode;

/**
 * A dependency node filter that logically ANDs together a number of other dependency node filters.
 * 
 * @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a>
 * @version $Id$
 * @since 1.1
 */
public class AndDependencyNodeFilter implements DependencyNodeFilter
{
    // fields -----------------------------------------------------------------

    /**
     * The dependency node filters that this filter ANDs together.
     */
    private final List filters;

    // constructors -----------------------------------------------------------

    /**
     * Creates a dependency node filter that logically ANDs together the two specified dependency node filters.
     * 
     * @param filter1
     *            the first dependency node filter to logically AND together
     * @param filter2
     *            the second dependency node filter to logically AND together
     */
    public AndDependencyNodeFilter( DependencyNodeFilter filter1, DependencyNodeFilter filter2 )
    {
        this( Arrays.asList( new DependencyNodeFilter[] { filter1, filter2 } ) );
    }

    /**
     * Creates a dependency node filter that logically ANDs together the specified dependency node filters.
     * 
     * @param filters
     *            the list of dependency node filters to logically AND together
     */
    public AndDependencyNodeFilter( List filters )
    {
        this.filters = Collections.unmodifiableList( filters );
    }

    // DependencyNodeFilter methods -------------------------------------------

    /**
     * {@inheritDoc}
     */
    public boolean accept( DependencyNode node )
    {
        boolean accept = true;

        for ( Iterator iterator = filters.iterator(); accept && iterator.hasNext(); )
        {
            DependencyNodeFilter filter = (DependencyNodeFilter) iterator.next();

            accept = filter.accept( node );
        }

        return accept;
    }

    // public methods ---------------------------------------------------------

    /**
     * Gets the list of dependency node filters that this filter ANDs together.
     * 
     * @return the dependency node filters that this filter ANDs together
     */
    public List getDependencyNodeFilters()
    {
        return filters;
    }
}