/* ====================================================================
   Copyright 2003-2004   Apache Software Foundation

   Licensed 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.poi.poifs.eventfilesystem;

import junit.framework.*;

import java.util.*;

import org.apache.poi.poifs.filesystem.POIFSDocumentPath;

/**
 * Class to test POIFSReaderRegistry functionality
 *
 * @author Marc Johnson
 */

public class TestPOIFSReaderRegistry
    extends TestCase
{
    private POIFSReaderListener[] listeners =
    {
        new Listener(), new Listener(), new Listener(), new Listener()
    };
    private POIFSDocumentPath[]   paths     =
    {
        new POIFSDocumentPath(), new POIFSDocumentPath(new String[]
        {
            "a"
        }), new POIFSDocumentPath(new String[]
        {
            "b"
        }), new POIFSDocumentPath(new String[]
        {
            "c"
        })
    };
    private String[]              names     =
    {
        "a0", "a1", "a2", "a3"
    };

    /**
     * Constructor TestPOIFSReaderRegistry
     *
     * @param name
     */

    public TestPOIFSReaderRegistry(String name)
    {
        super(name);
    }

    /**
     * Test empty registry
     */

    public void testEmptyRegistry()
    {
        POIFSReaderRegistry registry = new POIFSReaderRegistry();

        for (int j = 0; j < paths.length; j++)
        {
            for (int k = 0; k < names.length; k++)
            {
                Iterator listeners = registry.getListeners(paths[ j ],
                                                           names[ k ]);

                assertTrue(!listeners.hasNext());
            }
        }
    }

    /**
     * Test mixed registration operations
     */

    public void testMixedRegistrationOperations()
    {
        POIFSReaderRegistry registry = new POIFSReaderRegistry();

        for (int j = 0; j < listeners.length; j++)
        {
            for (int k = 0; k < paths.length; k++)
            {
                for (int n = 0; n < names.length; n++)
                {
                    if ((j != k) && (k != n))
                    {
                        registry.registerListener(listeners[ j ], paths[ k ],
                                                  names[ n ]);
                    }
                }
            }
        }
        for (int k = 0; k < paths.length; k++)
        {
            for (int n = 0; n < names.length; n++)
            {
                Iterator listeners = registry.getListeners(paths[ k ],
                                                           names[ n ]);

                if (k == n)
                {
                    assertTrue(!listeners.hasNext());
                }
                else
                {
                    Set registeredListeners = new HashSet();

                    while (listeners.hasNext())
                    {
                        registeredListeners.add(listeners.next());
                    }
                    assertEquals(this.listeners.length - 1,
                                 registeredListeners.size());
                    for (int j = 0; j < this.listeners.length; j++)
                    {
                        if (j == k)
                        {
                            assertTrue(!registeredListeners
                                .contains(this.listeners[ j ]));
                        }
                        else
                        {
                            assertTrue(registeredListeners
                                .contains(this.listeners[ j ]));
                        }
                    }
                }
            }
        }
        for (int j = 0; j < listeners.length; j++)
        {
            registry.registerListener(listeners[ j ]);
        }
        for (int k = 0; k < paths.length; k++)
        {
            for (int n = 0; n < names.length; n++)
            {
                Iterator listeners           =
                    registry.getListeners(paths[ k ], names[ n ]);
                Set      registeredListeners = new HashSet();

                while (listeners.hasNext())
                {
                    registeredListeners.add(listeners.next());
                }
                assertEquals(this.listeners.length,
                             registeredListeners.size());
                for (int j = 0; j < this.listeners.length; j++)
                {
                    assertTrue(registeredListeners
                        .contains(this.listeners[ j ]));
                }
            }
        }
    }

    /**
     * main method to run the unit tests
     *
     * @param ignored_args
     */

    public static void main(String [] ignored_args)
    {
        System.out.println(
            "Testing org.apache.poi.poifs.eventfilesystem.POIFSReaderRegistry");
        junit.textui.TestRunner.run(TestPOIFSReaderRegistry.class);
    }
}
