tvbrowser.ui.settings.channel.ChannelFilter.java Source code

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Here is the source code for tvbrowser.ui.settings.channel.ChannelFilter.java

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/*
 * TV-Browser
 * Copyright (C) 04-2003 Martin Oberhauser (darras@users.sourceforge.net)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * CVS information:
 *  $RCSfile$
 *   $Source$
 *     $Date: 2010-01-30 17:12:46 +0100 (Sat, 30 Jan 2010) $
 *   $Author: bananeweizen $
 * $Revision: 6426 $
 */
package tvbrowser.ui.settings.channel;

import org.apache.commons.lang.StringUtils;

import devplugin.Channel;

/**
 * Filters for a specific Country, Category and/or Channelname
 */
public class ChannelFilter {
    private static final String[] NORMALIZE_REPLACE = new String[] { "o", "a", "u", "s", "o", "a", "u", "s" };

    private static final String[] NORMALIZE_SEARCH = new String[] { "", "", "", "", "oe", "ae", "ue", "ss" };

    private String mCountry;

    private int[] mCategories;

    private String[] mChannelName;

    /**
     * Creates an empty Filter
     */
    public ChannelFilter() {
        setFilter(null, new int[] { Integer.MAX_VALUE }, null);
    }

    /**
     * Creates the Filter
     * @param country Country to use or NULL
     * @param categories Category to use, if < 0 use exact category, if MAX_INT don't use category
     * @param name Name to search for. This is an "and" Search. Search-Terms are separated by Whitespace
     */
    public ChannelFilter(String country, int categories, String name) {
        setFilter(country, new int[] { categories }, name);
    }

    /**
     * Set the Values in the Filter
     * @param country
     * @param category
     * @param name
     */
    public void setFilter(String country, int category, String name) {
        setFilter(country, new int[] { category }, name);
    }

    /**
     * Set the Values in the Filter
     * @param country
     * @param categories
     * @param name
     */
    public void setFilter(String country, int[] categories, String name) {
        mCountry = country;
        mCategories = categories.clone();
        if ((mChannelName != null) && (StringUtils.isNotBlank(name))) {
            mChannelName = name.trim().split("\\s");
            for (int i = 0; i < mChannelName.length; i++) {
                mChannelName[i] = normalizeCharacters(mChannelName[i]);
            }
        } else {
            mChannelName = new String[] {};
        }
    }

    /**
     * @param channel Channel to check
     * @return True if Channel is accepted by this Filter
     */
    public boolean accept(Channel channel) {
        if (mCountry != null) {
            String country = channel.getCountry();
            if (country != null) {
                if (!country.equalsIgnoreCase(mCountry)) {
                    return false;
                }
            } else {
                return false;
            }
        }

        if (mChannelName.length > 0) {
            String channelName = normalizeCharacters(channel.getName());
            for (String name : mChannelName) {
                if (!channelName.contains(name)) {
                    return false;
                }
            }
        }

        boolean categoryTest = false;
        int i = 0;
        int max = mCategories.length;

        while (i < max && !categoryTest) {
            int category = mCategories[i];

            if (category != Integer.MAX_VALUE) {
                if ((category < 0)) {
                    category *= -1;
                    if (channel.getCategories() == category) {
                        categoryTest = true;
                    }
                } else if (category == 0) {
                    if (channel.getCategories() == 0) {
                        categoryTest = true;
                    }
                } else if ((channel.getCategories() & category) != 0) {
                    categoryTest = true;
                }
            } else {
                categoryTest = true;
            }

            i++;
        }

        if (!categoryTest) {
            return false;
        }

        return true;
    }

    /**
     * Normalizes the Text for better Search results
     *
     * @param text Text to normalize
     * @return normalized Text
     */
    private String normalizeCharacters(String text) {
        return StringUtils.replaceEach(text.toLowerCase().trim(), NORMALIZE_SEARCH, NORMALIZE_REPLACE);
    }

}