001    package org.gwtbootstrap3.client.ui.base.helper;
002    
003    /*
004     * #%L
005     * GwtBootstrap3
006     * %%
007     * Copyright (C) 2013 GwtBootstrap3
008     * %%
009     * Licensed under the Apache License, Version 2.0 (the "License");
010     * you may not use this file except in compliance with the License.
011     * You may obtain a copy of the License at
012     * 
013     *      http://www.apache.org/licenses/LICENSE-2.0
014     * 
015     * Unless required by applicable law or agreed to in writing, software
016     * distributed under the License is distributed on an "AS IS" BASIS,
017     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018     * See the License for the specific language governing permissions and
019     * limitations under the License.
020     * #L%
021     */
022    
023    import com.google.gwt.dom.client.Style;
024    
025    /**
026     * @author Sven Jacobs
027     */
028    public final class EnumHelper {
029    
030        /**
031         * Returns first enum constant found in at space-separated list of style names.
032         *
033         * @param styleName    Space-separated list of styles
034         * @param enumClass    Type of enum
035         * @param defaultValue Default value of no match was found
036         * @param <E>
037         * @return First enum constant found or default value
038         */
039        @SuppressWarnings("unchecked")
040        public static <E extends Enum<? extends Style.HasCssName>> E fromStyleName(final String styleName,
041                                                                                   final Class<E> enumClass,
042                                                                                   final E defaultValue) {
043    
044            if (styleName == null || enumClass == null) {
045                return defaultValue;
046            }
047    
048            for (final Enum<? extends Style.HasCssName> constant : enumClass.getEnumConstants()) {
049                final Style.HasCssName anEnum = (Style.HasCssName) constant;
050                final String cssClass = anEnum.getCssName();
051    
052                if (cssClass != null && StyleHelper.containsStyle(styleName, cssClass)) {
053                    return (E) anEnum;
054                }
055            }
056    
057            return defaultValue;
058        }
059    
060        private EnumHelper() {
061        }
062    }