src/main/java/org/apache/sling/thumbnails/OutputFileFormat.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.sling.thumbnails;

import com.google.common.net.MediaType;

import org.apache.commons.lang3.StringUtils;
import org.apache.sling.api.SlingHttpServletRequest;
import org.jetbrains.annotations.NotNull;
import org.osgi.annotation.versioning.ProviderType;

/**
 * Enumeration of the valid output formats for the thumbnail generator.
 */
@ProviderType
public enum OutputFileFormat {
    GIF(MediaType.GIF.toString()), JPEG(MediaType.JPEG.toString()), PNG(MediaType.PNG.toString());

    /**
     * Loads the output format requested in the specified request suffix.
     * 
     * @param request the current request from which to get the suffix
     * @return the format for the suffix
     */
    public static OutputFileFormat forRequest(SlingHttpServletRequest request) {
        return forValue(StringUtils.substringAfterLast(request.getRequestPathInfo().getSuffix(), "."));

    }

    /**
     * Loads the output format
     * 
     * @param request the requested format
     * @return the format requested
     */
    public static OutputFileFormat forValue(@NotNull String format) {
        format = format.toUpperCase();
        if ("JPG".equals(format)) {
            format = "JPEG";
        }
        try {
            return Enum.valueOf(OutputFileFormat.class, format);
        } catch (IllegalArgumentException | NullPointerException e) {
            throw new BadRequestException("Could not get valid extension from: " + format);
        }
    }

    private String mimeType;

    private OutputFileFormat(String mimeType) {
        this.mimeType = mimeType;
    }

    public String getMimeType() {
        return mimeType;
    }
}