/**
 * Copyright (C) 2011 BonitaSoft S.A.
 * BonitaSoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * 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 2.0 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, see <http://www.gnu.org/licenses/>.
 */
package org.bonitasoft.web.toolkit.client.ui.utils;

import java.util.ArrayList;
import java.util.List;

/**
 * @author Séverin Moussel
 * 
 */
public class ListUtils {

    public static void removeFromListByClass(final List<?> list, final String className) {
        removeFromListByClass(list, className, false);
    }

    public static void removeFromListByClass(final List<?> list, final String className, final boolean firstOnly) {
        for (int i = 0; i < list.size(); i++) {
            final Object o = list.get(i);
            if (o.getClass().getName().equals(className)) {
                list.remove(i);
                if (firstOnly) {
                    return;
                }
                i--;
            }
        }
    }

    public static Object getFromListByClass(final List<?> list, final String className) {
        for (final Object o : list) {
            if (o.getClass().getName().equals(className)) {
                return o;
            }
        }

        return null;
    }

    public static String join(final List<?> list, final String separator) {
        return join(list, separator, separator, "", "");
    }

    public static String join(final List<?> list, final String separator, final String lastSeparator) {
        return join(list, separator, lastSeparator, "", "");
    }

    public static String join(final List<?> list, final String separator, final String lastSeparator, final String itemPrefix, final String itemSuffix) {
        if (list == null || list.isEmpty()) {
            return "";
        }

        final StringBuilder result = new StringBuilder();
        for (int i = 0; i < list.size(); i++) {
            final Object item = list.get(i);
            if (item != null) {
                if (i == list.size() - 1 && list.size() > 1) {
                    result.append(lastSeparator);
                } else if (i > 0) {
                    result.append(separator);
                }
                if (itemPrefix != null) {
                    result.append(itemPrefix);
                }
                result.append(item.toString());
                if (itemSuffix != null) {
                    result.append(itemSuffix);
                }
            }
        }

        return result.toString();
    }

    public static abstract class Transformer<E, O> {

        public abstract O transform(E entry);
    }

    public static <E, O> List<O> transform(List<E> list, Transformer<E, O> transformer) {
        List<O> newList = new ArrayList<O>();
        for (E entry : list) {
            newList.add(transformer.transform(entry));
        }
        return newList;
    }
}