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Commons FileUpload example source code file (FileItemStream.java)

This example Commons FileUpload source code file (FileItemStream.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons FileUpload tags/keywords

fileitemheaderssupport, fileitemheaderssupport, fileitemstream, fileitemstream, inputstream, io, ioexception, ioexception, itemskippedexception, string, string

The Commons FileUpload FileItemStream.java source code

/*
 * 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.commons.fileupload;

import java.io.IOException;
import java.io.InputStream;


/**
 * <p> This interface provides access to a file or form item that was
 * received within a <code>multipart/form-data POST request.
 * The items contents are retrieved by calling {@link #openStream()}.</p>
 * <p>Instances of this class are created by accessing the
 * iterator, returned by
 * {@link FileUploadBase#getItemIterator(RequestContext)}.</p>
 * <p>Note: There is an interaction between the iterator and
 * its associated instances of {@link FileItemStream}: By invoking
 * {@link java.util.Iterator#hasNext()} on the iterator, you discard all data,
 * which hasn't been read so far from the previous data.</p>
 */
public interface FileItemStream extends FileItemHeadersSupport {
    /**
     * This exception is thrown, if an attempt is made to read
     * data from the {@link InputStream}, which has been returned
     * by {@link FileItemStream#openStream()}, after
     * {@link java.util.Iterator#hasNext()} has been invoked on the
     * iterator, which created the {@link FileItemStream}.
     */
    public static class ItemSkippedException extends IOException {
        /**
         * The exceptions serial version UID, which is being used
         * when serializing an exception instance.
         */
        private static final long serialVersionUID = -7280778431581963740L;
    }

    /** Creates an {@link InputStream}, which allows to read the
     * items contents.
     * @return The input stream, from which the items data may
     *   be read.
     * @throws IllegalStateException The method was already invoked on
     * this item. It is not possible to recreate the data stream.
     * @throws IOException An I/O error occurred.
     * @see ItemSkippedException
     */
    InputStream openStream() throws IOException;

    /**
     * Returns the content type passed by the browser or <code>null if
     * not defined.
     *
     * @return The content type passed by the browser or <code>null if
     *         not defined.
     */
    String getContentType();

    /**
     * Returns the original filename in the client's filesystem, as provided by
     * the browser (or other client software). In most cases, this will be the
     * base file name, without path information. However, some clients, such as
     * the Opera browser, do include path information.
     *
     * @return The original filename in the client's filesystem.
     */
    String getName();

    /**
     * Returns the name of the field in the multipart form corresponding to
     * this file item.
     *
     * @return The name of the form field.
     */
    String getFieldName();

    /**
     * Determines whether or not a <code>FileItem instance represents
     * a simple form field.
     *
     * @return <code>true if the instance represents a simple form
     *         field; <code>false if it represents an uploaded file.
     */
    boolean isFormField();
}

Other Commons FileUpload examples (source code examples)

Here is a short list of links related to this Commons FileUpload FileItemStream.java source code file:

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