org.richfaces.component.AbstractFileUpload Maven / Gradle / Ivy
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*
* This is free software; you can redistribute it and/or modify it
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* This software is distributed in the hope that it will be useful,
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* Lesser General Public License for more details.
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*/
package org.richfaces.component;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import javax.el.MethodExpression;
import javax.faces.component.UIComponentBase;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.ComponentSystemEvent;
import javax.faces.event.FacesEvent;
import javax.faces.event.ListenerFor;
import javax.faces.event.PostAddToViewEvent;
import org.richfaces.cdk.annotations.Attribute;
import org.richfaces.cdk.annotations.EventName;
import org.richfaces.cdk.annotations.JsfComponent;
import org.richfaces.cdk.annotations.JsfRenderer;
import org.richfaces.cdk.annotations.Tag;
import org.richfaces.component.attribute.AjaxProps;
import org.richfaces.component.attribute.CoreProps;
import org.richfaces.component.attribute.DisabledProps;
import org.richfaces.component.attribute.ErrorProps;
import org.richfaces.component.attribute.EventsKeyProps;
import org.richfaces.component.attribute.EventsMouseProps;
import org.richfaces.component.attribute.I18nProps;
import org.richfaces.event.FileUploadEvent;
import org.richfaces.event.FileUploadListener;
import org.richfaces.model.UploadedFile;
import org.richfaces.view.facelets.FileUploadHandler;
/**
*
* The <rich:fileUpload> component allows the user to upload files to a server. It features multiple uploads, progress
* bars, restrictions on file types, and restrictions on sizes of the files to be uploaded.
*
*
* @author Konstantin Mishin
* @author Lukas Fryc
* @author Simone Cinti
*/
@JsfComponent(tag = @Tag(generate = false, handlerClass = FileUploadHandler.class), renderer = @JsfRenderer(type = "org.richfaces.FileUploadRenderer"))
@ListenerFor(systemEventClass = PostAddToViewEvent.class)
public abstract class AbstractFileUpload extends UIComponentBase implements AjaxProps, CoreProps, DisabledProps,
EventsKeyProps, EventsMouseProps, ErrorProps, I18nProps {
public static final String COMPONENT_TYPE = "org.richfaces.FileUpload";
public static final String COMPONENT_FAMILY = "org.richfaces.FileUpload";
private static final String QUEUED_FILE_UPLOAD_EVENTS_ATTR = "queuedFileUploadEvents";
/**
* Defines comma separated list of file extensions accepted by component. The format of the file extension can be "png" or
* ".png", the second format will filter extensions in the dialog window. The component does not provide any feedback when
* rejecting file. For introducing feedback for rejection, use ontyperejected parameter.
*/
@Attribute
public abstract String getAcceptedTypes();
/**
* Defines maximum number of files allowed to be uploaded. After a number of files in the list equals to the value of this
* attribute, "Add" button disappears and nothing could be uploaded even if you clear the whole list. In order to upload
* files again you should rerender the component. (Negative numbers means no limits; default value -1).
*/
@Attribute(defaultValue = "-1")
public abstract Integer getMaxFilesQuantity();
/**
* Defines the maximum allowed size of a file. Files exceeding the size will not be added in the component.
* Default value is 0 (no limit).
*/
@Attribute(defaultValue = "0L")
public abstract long getMaxFileSize();
/**
*
* If "true" duplicate file uploads are prevented
*
*
* Default is "false"
*
*/
@Attribute(defaultValue = "false")
public abstract boolean isNoDuplicate();
/**
*
* If "true" upload stats immediately after file selection
*
*
* Default is "false"
*
*/
@Attribute(defaultValue = "false")
public abstract boolean isImmediateUpload();
/**
* Javascript code executed when a file is selected
*/
@Attribute(events = @EventName("fileselect"))
public abstract String getOnfileselect();
/**
* Javascript code executed when a file is submitted
*/
@Attribute(events = @EventName("filesubmit"))
public abstract String getOnfilesubmit();
/**
* Javascript code executed when a file does not meet the conditions stated by acceptedTypes parameter.
*/
@Attribute(events = @EventName("typerejected"))
public abstract String getOntyperejected();
/**
* Javascript code executed when a file exceeds the allowed size defined by maxFileSize parameter.
*/
@Attribute(events = @EventName("sizerejected"))
public abstract String getOnsizerejected();
/**
* Javascript code executed when a file upload is complete
*/
@Attribute(events = @EventName("uploadcomplete"))
public abstract String getOnuploadcomplete();
/**
* Javascript code executed when a file is cleared
*/
@Attribute(events = @EventName("clear"))
public abstract String getOnclear();
/**
* The client-side script method to be called when an error has occurred during Ajax communications
*/
@Attribute(events = @EventName("error"))
public abstract String getOnerror();
/**
* The label for the Add button.
*/
@Attribute
public abstract String getAddLabel();
/**
* The label for the Upload button.
*/
@Attribute
public abstract String getUploadLabel();
/**
* The label for the Clear button.
*/
@Attribute
public abstract String getClearAllLabel();
/**
* The label displayed when a file is successfully uploaded.
*/
@Attribute
public abstract String getDoneLabel();
/**
* The label displayed when a file exceeds the size limit.
*/
@Attribute
public abstract String getSizeExceededLabel();
/**
* The label displayed when a file upload fails due to a server error.
*/
@Attribute
public abstract String getServerErrorLabel();
/**
* The label displayed for the Clear link
*/
@Attribute
public abstract String getClearLabel();
/**
* The label displayed for the Delete link
*/
@Attribute
public abstract String getDeleteLabel();
/**
*
* Defines height of file list.
*
*
* Default value is "210px".
*
*/
@Attribute(defaultValue = "210px")
public abstract String getListHeight();
@Override
public void processEvent(ComponentSystemEvent event) throws AbortProcessingException {
super.processEvent(event);
if (event.getSource() == this) {
if (event instanceof PostAddToViewEvent) {
this.getAttributes().put("queuedFileUploadEvents", new AtomicInteger(0));
}
}
}
/**
* A listener function on the server side after each file is uploaded. The listener should process files as required, such
* as storing them in the session/db/filesystem/ directory. The component itself does not store uploaded files, so if the
* listener is not implemented they are not stored anywhere
*/
@Attribute
public abstract MethodExpression getFileUploadListener();
/**
*
* Add a new {@link FileUploadListener} to the set of listeners interested in being notified when
* {@link org.richfaces.event.FileUploadEvent}s occur.
*
*
* @param listener The {@link FileUploadListener} to be added
* @throws NullPointerException if listener is null
*/
public void addFileUploadListener(FileUploadListener listener) {
addFacesListener(listener);
}
/**
*
* Return the set of registered {@link FileUploadListener}s for this {@link AbstractFileUpload} instance. If there are no
* registered listeners, a zero-length array is returned.
*
*/
public FileUploadListener[] getFileUploadListeners() {
return (FileUploadListener[]) getFacesListeners(FileUploadListener.class);
}
/**
*
* Remove an existing {@link FileUploadListener} (if any) from the set of listeners interested in being notified when
* {@link FileUploadListener}s occur.
*
*
* @param listener The {@link FileUploadListener} to be removed
* @throws NullPointerException if listener is null
*/
public void removeFileUploadListener(FileUploadListener listener) {
removeFacesListener(listener);
}
/**
* Get a list of accepted types from {@link #getAcceptedTypes()} attribute.
*/
public List getAcceptedTypesList() {
String acceptedTypes = this.getAcceptedTypes();
if (acceptedTypes == null || acceptedTypes.isEmpty()) {
return Collections.emptyList();
} else {
return Arrays.asList(acceptedTypes.toLowerCase().replaceAll("\\.", "").split("\\s*,\\s*"));
}
}
/**
* Checks whether this component can accept given {@link UploadedFile}..
*
* First, the number of enqueued {@link FileUploadEvent} events can't exceed {@link #getMaxFilesQuantity()}.
*
* Then, the file extension of uploaded file needs to be acceptable by this component (see {@link #getAcceptedTypes()}).
*/
public boolean acceptsFile(UploadedFile file) {
final String clientId = this.getClientId();
final int maxFilesQuantity = this.getMaxFilesQuantity();
final List acceptedTypes = this.getAcceptedTypesList();
if ((maxFilesQuantity > 0) && (queuedFileUploadEvents().get() >= maxFilesQuantity)) {
return false;
}
if (clientId.equals(file.getParameterName())) {
if (acceptedTypes.isEmpty()) {
return true;
}
if (acceptedTypes.contains(file.getFileExtension().toLowerCase())) {
return true;
}
}
return false;
}
/**
* Increments number of {@link FileUploadEvent} which were queued
*/
@Override
public void queueEvent(FacesEvent event) {
if (event instanceof FileUploadEvent) {
queuedFileUploadEvents().addAndGet(1);
}
super.queueEvent(event);
}
/**
* Returns a number of {@link FileUploadEvent} which were already queued for this component
*/
private AtomicInteger queuedFileUploadEvents() {
AtomicInteger i = (AtomicInteger) this.getAttributes().get(QUEUED_FILE_UPLOAD_EVENTS_ATTR);
return i;
}
}
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