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Jersey Multipart entity providers support module.
/*
* Copyright (c) 2012, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.jersey.media.multipart;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import jakarta.ws.rs.core.MediaType;
/**
* Utility for creating boundary parameters.
*
* @author Paul Sandoz
* @author Michal Gajdos
*/
public final class Boundary {
public static final String BOUNDARY_PARAMETER = "boundary";
private static final AtomicInteger boundaryCounter = new AtomicInteger();
/**
* Transforms a media type and add a boundary parameter with a unique value
* if one is not already present.
*
* @param mediaType if {@code null} then a media type of "multipart/mixed" with a boundary parameter will be returned.
* @return the media type with a boundary parameter.
*/
public static MediaType addBoundary(MediaType mediaType) {
if (mediaType == null) {
return MultiPartMediaTypes.createMixed();
}
if (!mediaType.getParameters().containsKey(BOUNDARY_PARAMETER)) {
final Map parameters = new HashMap(
mediaType.getParameters());
parameters.put(BOUNDARY_PARAMETER, createBoundary());
return new MediaType(mediaType.getType(), mediaType.getSubtype(),
parameters);
}
return mediaType;
}
/**
* Creates a unique boundary.
*
* @return the boundary.
*/
public static String createBoundary() {
return new StringBuilder("Boundary_")
.append(boundaryCounter.incrementAndGet())
.append('_')
.append(new Object().hashCode())
.append('_')
.append(System.currentTimeMillis())
.toString();
}
}