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package org.glassfish.jersey.media.multipart.file;

import java.io.InputStream;
import java.text.MessageFormat;

import javax.ws.rs.core.MediaType;

import org.glassfish.jersey.media.multipart.FormDataBodyPart;
import org.glassfish.jersey.media.multipart.FormDataContentDisposition;

/**
 * Represents an {@link InputStream} based file submission as a part of the
 * multipart/form-data.
 * 

* It sets the {@link InputStream} as a body part with the default * {@link MediaType#APPLICATION_OCTET_STREAM_TYPE} (if not specified by the * user). *

* Note: The MIME type of the entity cannot be automatically predicted as in case * of {@link FileDataBodyPart}. *

* The filename of the attachment is set by the user or defaults to the part's * name. * * @author Pedro Kowalski (pallipp at gmail.com) * @author Michal Gajdos * * @see FileDataBodyPart */ public class StreamDataBodyPart extends FormDataBodyPart { /** * Underlying input stream entity to be sent. */ private InputStream streamEntity; /** * Filename of the attachment (stream) set by the user. */ private String filename; /** * Default constructor which forces user to manually set * the required ({@code name} and {@code streamEntity}) * properties. *

* {@link StreamDataBodyPart#setFilename(String)} can be used to set * user-specified attachment filename instead of the default one. * * @see FormDataBodyPart#setName(String) * @see StreamDataBodyPart#setStreamEntity(InputStream, MediaType) */ public StreamDataBodyPart() { } /** * Convenience constructor which assumes the defaults for: * {@code filename} (part's name) and {@code mediaType} ( * {@link MediaType#APPLICATION_OCTET_STREAM_TYPE}). *

* It builds the requested body part and makes the part ready for * submission. * * @param name name of the form-data field. * @param streamEntity entity to be set as a body part. */ public StreamDataBodyPart(final String name, final InputStream streamEntity) { this(name, streamEntity, null, null); } /** * Convenience constructor which assumes the defaults for the * {@code mediaType} ({@link MediaType#APPLICATION_OCTET_STREAM_TYPE}). *

* It builds the requested body part and makes the part ready for * submission. * * @param name name of the form-data field. * @param streamEntity entity to be set as a body part. * @param filename filename of the sent attachment (to be set as a part of * {@code content-disposition}). */ public StreamDataBodyPart(final String name, final InputStream streamEntity, final String filename) { this(name, streamEntity, filename, null); } /** * All-arguments constructor with all requested parameters set by the * caller. *

* It builds the requested body part and makes the part ready for * submission. * * @param name name of the form-data field. * @param streamEntity entity to be set as a body part. * @param filename filename of the sent attachment (to be set as a part of * {@code content-disposition}). * @param mediaType MIME type of the {@code streamEntity} attachment. * @throws IllegalArgumentException if {@code name} or {@code streamEntity} are {@code null}. */ public StreamDataBodyPart(final String name, final InputStream streamEntity, final String filename, final MediaType mediaType) { // Not allowed in non-default constructor invocation. if (name == null || streamEntity == null) { MessageFormat msg = new MessageFormat( "Neither the \"name\" nor \"streamEntity\" can be null. Passed values: \"{0}\" \"{1}\""); throw new IllegalArgumentException(msg.format(new Object[] {name, streamEntity})); } setFilename(filename); // Be sure to hit the parent (non-overloaded) method. super.setName(name); if (mediaType != null) { setStreamEntity(streamEntity, mediaType); } else { setStreamEntity(streamEntity, getDefaultMediaType()); } } /** * This operation is not supported from this implementation. * * @throws java.lang.UnsupportedOperationException Operation not supported. * * @see StreamDataBodyPart#setStreamEntity(InputStream, MediaType) */ @Override public void setValue(final MediaType mediaType, final Object value) throws UnsupportedOperationException { throw new UnsupportedOperationException("It is unsupported, please use setStreamEntity(-) instead!"); } /** * This operation is not supported from this implementation. * * @throws java.lang.UnsupportedOperationException Operation not supported. * * @see StreamDataBodyPart#setStreamEntity(InputStream) */ @Override public void setValue(final String value) { throw new UnsupportedOperationException("It is unsupported, please use setStreamEntity(-) instead!"); } /** * This operation is not supported from this implementation. * * @throws java.lang.UnsupportedOperationException Operation not supported. * * @see StreamDataBodyPart#setStreamEntity(InputStream, MediaType) */ @Override public void setEntity(final Object entity) throws UnsupportedOperationException { throw new UnsupportedOperationException("It is unsupported, please use setStreamEntity(-) instead!"); } /** * Allows to explicitly set the body part entity. This method assumes the * default {@link MediaType#APPLICATION_OCTET_STREAM} MIME type and doesn't * have to be invoked if one of the non-default constructors was already * called. *

* Either this method or {@link StreamDataBodyPart#setStreamEntity(InputStream, MediaType)} * must be invoked if the default constructor was called. * * @param streamEntity entity to be set as a body part. */ public void setStreamEntity(final InputStream streamEntity) { this.setStreamEntity(streamEntity, getDefaultMediaType()); } /** * Allows to explicitly set the value and the MIME type of the body part * entity. This method doesn't have to be invoked if one of the non-default * constructors was already called. *

* Either this method or {@link StreamDataBodyPart#setStreamEntity(InputStream)} * must be invoked if the default constructor was called. * * @param streamEntity entity to be set as a body part. * @param mediaType MIME type of the {@code streamEntity} attachment. */ public void setStreamEntity(final InputStream streamEntity, MediaType mediaType) { if (streamEntity == null) { throw new IllegalArgumentException("Stream body part entity cannot be null."); } if (mediaType == null) { mediaType = getDefaultMediaType(); } this.streamEntity = streamEntity; // Be sure to hit the parent (non-overloaded) method. super.setMediaType(mediaType); super.setEntity(streamEntity); setFormDataContentDisposition(buildContentDisposition()); } /** * Builds the body part content-disposition header which the specified * filename (or the default one if unspecified). * * @return ready to use content-disposition header. */ protected FormDataContentDisposition buildContentDisposition() { FormDataContentDisposition.FormDataContentDispositionBuilder builder = FormDataContentDisposition.name(getName()); if (filename != null) { builder.fileName(filename); } else { // Default is to set the name of the file as a form-field name. builder.fileName(getName()); } return builder.build(); } /** * Gets the default {@link MediaType} to be used if the user didn't specify * any. * * @return default {@link MediaType} for this body part entity. */ protected static MediaType getDefaultMediaType() { return MediaType.APPLICATION_OCTET_STREAM_TYPE; } /** * Sets the body part entity filename value to be used in the * content-disposition header. * * @param filename name to be used. */ public void setFilename(final String filename) { this.filename = filename; } /** * Gets the underlying stream entity which will form the body part entity. * * @return underlying stream. */ public InputStream getStreamEntity() { return streamEntity; } /** * Gets the filename value which is to be used in the content-disposition * header of this body part entity. * * @return filename. */ public String getFilename() { return filename; } }





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