Example usage for javax.servlet.http Part getClass

Introduction

In this page you can find the example usage for javax.servlet.http Part getClass.

Prototype

@HotSpotIntrinsicCandidate
public final native Class<?> getClass();

Source Link

Document

Returns the runtime class of this Object .

Usage

From source file:org.nuxeo.ecm.platform.ui.web.util.files.FileUtils.java

/**
 * Creates a Blob from a {@link Part}.//from  www. ja v a  2 s . c o  m
 * <p>
 * Attempts to capture the underlying temporary file, if one exists. This needs to use reflection to avoid having
 * dependencies on the application server.
 *
 * @param part the servlet part
 * @return the blob
 * @since 7.2
 */
public static Blob createBlob(Part part) throws IOException {
    Blob blob = null;
    try {
        // part : org.apache.catalina.core.ApplicationPart
        // part.fileItem : org.apache.tomcat.util.http.fileupload.disk.DiskFileItem
        // part.fileItem.isInMemory() : false if on disk
        // part.fileItem.getStoreLocation() : java.io.File
        Field fileItemField = part.getClass().getDeclaredField("fileItem");
        fileItemField.setAccessible(true);
        Object fileItem = fileItemField.get(part);
        if (fileItem != null) {
            Method isInMemoryMethod = fileItem.getClass().getDeclaredMethod("isInMemory");
            boolean inMemory = ((Boolean) isInMemoryMethod.invoke(fileItem)).booleanValue();
            if (!inMemory) {
                Method getStoreLocationMethod = fileItem.getClass().getDeclaredMethod("getStoreLocation");
                File file = (File) getStoreLocationMethod.invoke(fileItem);
                if (file != null) {
                    // move the file to a temporary blob we own
                    blob = Blobs.createBlobWithExtension(null);
                    Files.move(file.toPath(), blob.getFile().toPath(), StandardCopyOption.REPLACE_EXISTING);
                }
            }
        }
    } catch (ReflectiveOperationException | SecurityException | IllegalArgumentException e) {
        // unknown Part implementation
    }
    if (blob == null) {
        // if we couldn't get to the file, use the InputStream
        blob = Blobs.createBlob(part.getInputStream());
    }
    blob.setMimeType(part.getContentType());
    blob.setFilename(retrieveFilename(part));
    return blob;
}

---