cdi-extra/src/main/java/org/apache/aries/cdi/extra/propertytypes/HttpWhiteboardServletMultipart.java

/*
 * Copyright (c) OSGi Alliance (2017, 2019). All Rights Reserved.
 *
 * Licensed 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.aries.cdi.extra.propertytypes;

import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import javax.enterprise.util.AnnotationLiteral;

import org.osgi.service.cdi.annotations.BeanPropertyType;

/**
 * Component Property Type for the
 * {@code osgi.http.whiteboard.servlet.multipart.enabled},
 * {@code osgi.http.whiteboard.servlet.multipart.fileSizeThreshold},
 * {@code osgi.http.whiteboard.servlet.multipart.location},
 * {@code osgi.http.whiteboard.servlet.multipart.maxFileSize}, and
 * {@code osgi.http.whiteboard.servlet.multipart.maxRequestSize} service
 * properties.
 * <p>
 * This annotation can be used on a {@link javax.servlet.Servlet} to declare the
 * values of the
 * {@link org.osgi.service.http.whiteboard.HttpWhiteboardConstants#HTTP_WHITEBOARD_SERVLET_MULTIPART_ENABLED
 * HTTP_WHITEBOARD_SERVLET_MULTIPART_ENABLED},
 * {@link org.osgi.service.http.whiteboard.HttpWhiteboardConstants#HTTP_WHITEBOARD_SERVLET_MULTIPART_FILESIZETHRESHOLD
 * HTTP_WHITEBOARD_SERVLET_MULTIPART_FILESIZETHRESHOLD},
 * {@link org.osgi.service.http.whiteboard.HttpWhiteboardConstants#HTTP_WHITEBOARD_SERVLET_MULTIPART_LOCATION
 * HTTP_WHITEBOARD_SERVLET_MULTIPART_LOCATION},
 * {@link org.osgi.service.http.whiteboard.HttpWhiteboardConstants#HTTP_WHITEBOARD_SERVLET_MULTIPART_MAXFILESIZE
 * HTTP_WHITEBOARD_SERVLET_MULTIPART_MAXFILESIZE}, and
 * {@link org.osgi.service.http.whiteboard.HttpWhiteboardConstants#HTTP_WHITEBOARD_SERVLET_MULTIPART_MAXREQUESTSIZE
 * HTTP_WHITEBOARD_SERVLET_MULTIPART_MAXREQUESTSIZE} service properties.
 */
@BeanPropertyType
@Retention(RUNTIME)
@Target({FIELD, METHOD, TYPE})
public @interface HttpWhiteboardServletMultipart {

	public static final class Literal extends AnnotationLiteral<HttpWhiteboardServletMultipart> implements HttpWhiteboardServletMultipart {

		private static final long serialVersionUID = 1L;

		public static final Literal of(
				boolean enabled,
				int fileSizeThreshold,
				String location,
				long maxFileSize,
				long maxRequestSize) {

			return new Literal(enabled, fileSizeThreshold, location, maxFileSize, maxRequestSize);
		}

		public Literal(
			boolean enabled,
			int fileSizeThreshold,
			String location,
			long maxFileSize,
			long maxRequestSize) {

			_enabled = enabled;
			_fileSizeThreshold = fileSizeThreshold;
			_location = location;
			_maxFileSize = maxFileSize;
			_maxRequestSize = maxRequestSize;
		}

		@Override
		public boolean enabled() {
			return _enabled;
		}

		@Override
		public int fileSizeThreshold() {
			return _fileSizeThreshold;
		}

		@Override
		public String location() {
			return _location;
		}

		@Override
		public long maxFileSize() {
			return _maxFileSize;
		}

		@Override
		public long maxRequestSize() {
			return _maxRequestSize;
		}

		private final boolean _enabled;
		private final int _fileSizeThreshold;
		private final String _location;
		private final long _maxFileSize;
		private final long _maxRequestSize;
	}

	/**
	 * Prefix for the property name. This value is prepended to each property
	 * name.
	 */
	String PREFIX_ = "osgi.http.whiteboard.servlet.multipart.";

	/**
	 * Service property identifying the multipart handling of a servlet.
	 *
	 * @return Whether the servlet supports multipart handling.
	 * @see org.osgi.service.http.whiteboard.HttpWhiteboardConstants#HTTP_WHITEBOARD_SERVLET_MULTIPART_ENABLED
	 *      HTTP_WHITEBOARD_SERVLET_MULTIPART_ENABLED
	 */
	boolean enabled() default true;

	/**
	 * Service property identifying the file size threshold for a multipart
	 * request handled by a servlet.
	 *
	 * @return The file size threshold for a multipart request..
	 * @see org.osgi.service.http.whiteboard.HttpWhiteboardConstants#HTTP_WHITEBOARD_SERVLET_MULTIPART_FILESIZETHRESHOLD
	 *      HTTP_WHITEBOARD_SERVLET_MULTIPART_FILESIZETHRESHOLD
	 */
	int fileSizeThreshold() default 0;

	/**
	 * Service property identifying the location for a multipart request handled
	 * by a servlet.
	 *
	 * @return The location for a multipart request..
	 * @see org.osgi.service.http.whiteboard.HttpWhiteboardConstants#HTTP_WHITEBOARD_SERVLET_MULTIPART_LOCATION
	 *      HTTP_WHITEBOARD_SERVLET_MULTIPART_LOCATION
	 */
	String location() default "";

	/**
	 * Service property identifying the max file size for a multipart request
	 * handled by a servlet.
	 *
	 * @return The max file size for a multipart request..
	 * @see org.osgi.service.http.whiteboard.HttpWhiteboardConstants#HTTP_WHITEBOARD_SERVLET_MULTIPART_MAXFILESIZE
	 *      HTTP_WHITEBOARD_SERVLET_MULTIPART_MAXFILESIZE
	 */
	long maxFileSize() default -1;

	/**
	 * Service property identifying the max request size for a multipart request
	 * handled by a servlet.
	 *
	 * @return The max request size for a multipart request..
	 * @see org.osgi.service.http.whiteboard.HttpWhiteboardConstants#HTTP_WHITEBOARD_SERVLET_MULTIPART_MAXREQUESTSIZE
	 *      HTTP_WHITEBOARD_SERVLET_MULTIPART_MAXREQUESTSIZE
	 */
	long maxRequestSize() default -1;
}