ilarkesto.form.DropdownFormField.java Source code

Introduction

Here is the source code for ilarkesto.form.DropdownFormField.java

Source

/*
 * Copyright 2011 Witoslaw Koczewsi <wi@koczewski.de>, Artjom Kochtchi
 * 
 * This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public
 * License as published by the Free Software Foundation, either version 3 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 Affero 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 ilarkesto.form;

import ilarkesto.base.Str;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;

import org.apache.commons.fileupload.FileItem;

public class DropdownFormField<E> extends AFormField {

    private E value;
    private SortedMap<String, E> selectableItems;
    private boolean localizeItems;

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

    public DropdownFormField<E> setLocalizeItems(boolean localizeItems) {
        this.localizeItems = localizeItems;
        return this;
    }

    public boolean isLocalizeItems() {
        return localizeItems;
    }

    public DropdownFormField<E> setSelectableItems(Collection<E> items) {
        List<E> itemList = (List<E>) (items instanceof List ? items : new ArrayList<E>(items));
        if (!itemList.isEmpty() && itemList.get(0) instanceof Comparable)
            Collections.sort((List) itemList);
        this.selectableItems = new TreeMap<String, E>();
        int i = 0;
        for (E item : itemList) {
            String key = Str.fillUpLeft(String.valueOf(i++), "0", 4);
            selectableItems.put(key, item);
        }
        return this;
    }

    public Map<String, E> getSelectableItems() {
        return selectableItems;
    }

    public DropdownFormField<E> setValue(E value) {
        this.value = value;
        return this;
    }

    public E getValue() {
        return value;
    }

    public String getValueAsString() {
        return value == null ? null : value.toString();
    }

    public void update(Map<String, String> data, Collection<FileItem> uploadedFiles) {
        value = selectableItems.get(data.get(getName()));
    }

    public void validate() throws ValidationException {
        if (value == null && isRequired())
            throw new ValidationException("Eingabe erforderlich.");
    }

}