com.sun.webui.jsf.component.Upload Maven / Gradle / Ivy
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package com.sun.webui.jsf.component;
import com.sun.faces.annotation.Component;
import com.sun.faces.annotation.Property;
import com.sun.webui.jsf.model.UploadedFile;
import com.sun.webui.jsf.util.ThemeUtilities;
import java.io.InputStream;
import java.io.Serializable;
import javax.el.ValueExpression;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.FacesException;
import org.apache.commons.fileupload.FileItem;
/**
* The Upload component is used to create an input tag with its type
* field set to "file".
*/
@Component(type = "com.sun.webui.jsf.Upload", family = "com.sun.webui.jsf.Upload", displayName = "File Upload",
instanceName = "fileUpload", tagName = "upload", isContainer = false,
helpKey = "projrave_ui_elements_palette_wdstk-jsf1.2_file_upload",
propertiesHelpKey = "projrave_ui_elements_palette_wdstk-jsf1.2_propsheets_upload_props")
public class Upload extends Field implements Serializable {
private static final long serialVersionUID = -8352221221756513893L;
/**
* A string concatenated with the component ID to form the ID and
* name of the HTML input element.
*/
public static final String INPUT_ID = "_com.sun.webui.jsf.upload"; //NOI18N
public static final String INPUT_PARAM_ID = "_com.sun.webui.jsf.uploadParam"; //NOI18N
public static final String SCRIPT_ID = "_script";
public static final String SCRIPT_FACET = "script";
public static final String TEXT_ID = "_text";
public static final String LENGTH_EXCEEDED = "length_exceeded";
public static final String UPLOAD_ERROR_KEY = "upload_error_key";
public static final String FILE_SIZE_KEY = "file_size_key";
private static final boolean DEBUG = false;
/**
* Default constructor.
*/
public Upload() {
super();
setRendererType("com.sun.webui.jsf.Upload");
}
/**
* Return the family for this component.
*/
@Override
public String getFamily() {
return "com.sun.webui.jsf.Upload";
}
/**
* Log an error - only used during development time.
*/
@Override
protected void log(String s) {
System.out.println(this.getClass().getName() + "::" + s); //NOI18N
}
/**
* Converts the submitted value. Returns an object of type
* UploadedFile.
* @param context The FacesContext
* @param value An object representing the submitted value
* @return An Object representation of the value (a
* java.lang.String or a java.io.File, depending on how the
* component is configured
*/
@Override
public Object getConvertedValue(FacesContext context, Object value) {
if (DEBUG) {
log("getConvertedValue");
}
UploadedFileImpl uf = new UploadedFileImpl(value, context);
if (DEBUG) {
log("\tSize is " + String.valueOf(uf.getSize()));
log("\tName is " + uf.getOriginalName());
log("\tValue is required " + String.valueOf(isRequired()));
}
if (isRequired() && uf.getSize() == 0) {
String name = uf.getOriginalName();
if (name == null || name.trim().length() == 0) {
if (DEBUG) {
log("No file specified");
}
setValue("");
if (DEBUG) {
log("Set value to empty string");
}
return "";
//FacesMessage msg = new FacesMessage("Enter a file to upload");
//throw new ConverterException(msg);
}
}
return uf;
}
/**
* Return the value to be rendered when the component is
* rendered as a String. For the FileUpload, we never
* render the file name in the textfield, so we return null.
* @param context FacesContext for the current request
* @return A String value of the component
*/
@Override
public String getValueAsString(FacesContext context) {
return null;
}
/**
* Return the value to be rendered as a string when the
* component is readOnly. This method overrides the default
* behaviour by returning a String "No file uploaded" if
* getValueAsString() returns null.
* @param context FacesContext for the current request
* @return A String value of the component
*/
@Override
public String getReadOnlyValueString(FacesContext context) {
String valueString = null;
Object value = getValue();
if (value != null & value instanceof UploadedFile) {
try {
valueString = ((UploadedFile) value).getOriginalName();
} catch (Exception ex) {
// We have somehow lost the underlying file representation.
// We do nothing in this case.
}
}
if (valueString == null) {
valueString = ThemeUtilities.getTheme(context).getMessage("FileUpload.noFile");
}
return valueString;
}
/**
* Overrides getType in the FileInput class, to always return
* "file"
* @return "file"
*/
public String getType() {
return "file";
}
/**
* This method overrides getText() in Field. It always returns null.
*/
private Object _getText() {
return null;
}
/**
* This method overrides setText() in Field. It is a noop.
*/
@Override
public void setText(Object text) {
// do nothing
}
@Override
public int getColumns() {
int columns = _getColumns();
if (columns < 1) {
columns = 40;
setColumns(40);
}
return columns;
}
// Overrides the method in Field.java as a workaround for an
// apparent compiler problem (?). The renderer (for Upload as well
// as TextField etc) casts the component to Field. It invokes
// Field.getPrimaryElementID, and even though this.getClass()
// returns Upload, this.INPUT_ID returns Field.INPUT_ID and
// not Upload.INPUT_ID.
/**
* Retrieves the DOM ID for the HTML input element. To be used by
* Label component as a value for the "for" attribute.
* @deprecated
* @see #getLabeledElementId
*/
@Override
public String getPrimaryElementID(FacesContext context) {
String clntId = this.getClientId(context);
UIComponent labelComp = getLabelComponent(context, null);
if (labelComp == null) {
return clntId;
} else {
return clntId.concat(INPUT_ID);
}
}
// Overrides the method in Field.java as a workaround for an
// apparent compiler problem (?). The renderer (for Upload as well
// as TextField etc) casts the component to Field. It invokes
// Field.getPrimaryElementID, and even though this.getClass()
// returns Upload, this.INPUT_ID returns Field.INPUT_ID and
// not Upload.INPUT_ID.
/**
* Returns the ID of an HTML element suitable to use as the value
* of an HTML LABEL element's for attribute.
*
* @param context The FacesContext used for the request
* @return The id of the HTML element
*/
@Override
public String getLabeledElementId(FacesContext context) {
// If this component has a label either as a facet or
// an attribute, return the id of the input element
// that will have the "INPUT_ID" suffix. IF there is no
// label, then the input element id will be the component's
// client id.
//
// If it is read only then return null
//
if (isReadOnly()) {
return null;
}
// To ensure we get the right answer call getLabelComponent.
// This checks for a developer facet or the private label facet.
// It also checks the label attribute. This is better than
// relying on "getLabeledComponent" having been called
// like this method used to do.
//
String clntId = this.getClientId(context);
UIComponent labelComp = getLabelComponent(context, null);
if (labelComp == null) {
return clntId;
} else {
return clntId.concat(INPUT_ID);
}
}
/**
* Returns the id of an HTML element suitable to
* receive the focus.
*
* @param context The FacesContext used for the request
*/
@Override
public String getFocusElementId(FacesContext context) {
return getLabeledElementId(context);
}
// Obtain the FileItem in the constructor, based on the
// arguments. The original code attemtped to get the
// object repeatedly from the request parameters. But the
// instance may live longer that this current request thereby
// potentially returning a different FileItem. Also there was
// originally a transient attribute member. If the instance
// was serialized and restored the attribute member would be
// null causing the exception to be thrown.
// Originally the assumption was that the attribute member would
// never be null, otherwise getConvertedValue
// would not have been called and an instance of this class would
// not have been created.
//
// In addition, creator made changes that allows the FileItem
// to not exist in the request map. This means that the instance
// returned does not represent a valid FileItem. Originally this
// would have thrown an exception. But with the creator changes
// an exception is only thrown if the object found in the request
// map is not a FileItem object, and null is acceptable.
//
// This behavior may be different since the application will
// receive an instance of this class when there is no file
// when previously an exception would have been thrown.
//
class UploadedFileImpl implements UploadedFile {
private static final long serialVersionUID = -8806211528277303445L;
transient FileItem fileItemObject = null;
/** Creates a new instance of UploadedFileImpl */
UploadedFileImpl(Object attribute, FacesContext context) {
// Allow null
//
try {
this.fileItemObject = (FileItem) context.getExternalContext().getRequestMap().get(attribute);
} catch (Exception e) {
String message =
"File not uploaded. Is the upload filter installed ?";
throw new FacesException(message, e);
}
}
/**
* Write the contents of the uploaded file to a file on the
* server host. Note that writing files outside of the web
* server's tmp directory must be explicitly permitted through
* configuration of the server's security policy.
*
* This method is not guaranteed to succeed if called more
* than once for the same item.
* @param file The File where the contents should
* be written
*
* @exception Exception the
*/
public void write(java.io.File file) throws Exception {
if (fileItemObject != null) {
fileItemObject.write(file);
}
}
/**
* The size of the file in bytes.
* If there is no fileItemObject, return 0.
*
* @return The size of the file in bytes.
*/
public long getSize() {
if (fileItemObject != null) {
return fileItemObject.getSize();
} else {
return 0;
}
}
/**
* Use this method to retrieve the name that the file has on the web
* application user's local system.
* If the fileItemObject is null, return null;
*
* @return the name of the file on the web app user's system
*/
public String getOriginalName() {
if (fileItemObject != null) {
return fileItemObject.getName();
} else {
return null;
}
}
/**
* Returns a {@link java.io.InputStream InputStream} for
* reading the file.
* Returns null if fileItemObject is null.
*
* @return An {@link java.io.InputStream InputStream} for
* reading the file.
*
* @exception IOException if there is a problem while reading
* the file
*/
public java.io.InputStream getInputStream() throws java.io.IOException {
if (fileItemObject != null) {
return fileItemObject.getInputStream();
} else {
return null;
}
}
/**
* Get the content-type that the browser communicated with the
* request that included the uploaded file. If the browser did
* not specify a content-type, this method returns null.
* Returns null if fileItemObject is null.
*
* @return the content-type that the browser communicated
* with the request that included the uploaded file
*/
public String getContentType() {
if (fileItemObject != null) {
return fileItemObject.getContentType();
} else {
return null;
}
}
/**
* Use this method to retrieve the contents of the file as an
* array of bytes.
* Returns null if fileItemObject is null.
*
* @return The contents of the file as a byte array
*/
public byte[] getBytes() {
if (fileItemObject != null) {
return fileItemObject.get();
} else {
return null;
}
}
/**
* Use this method to retrieve the contents of the file as a
* String
* Returns null if fileItemObject is null.
*
* @return the contents of the file as a String
*/
public String getAsString() {
if (fileItemObject != null) {
return fileItemObject.getString();
} else {
return null;
}
}
/**
* Dispose of the resources associated with the file upload
* (this will happen automatically when the resource is
* garbage collected).
*/
public void dispose() {
if (fileItemObject != null) {
fileItemObject.delete();
}
}
}
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Tag attribute methods
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* Flag indicating that an input value for this field is mandatory, and
* failure to provide one will trigger a validation error.
*/
@Property(name = "required")
@Override
public void setRequired(boolean required) {
super.setRequired(required);
}
/**
* Return the ValueExpression stored for the
* specified name (if any), respecting any property aliases.
*
* @param name Name of value binding expression to retrieve
*/
@Override
public ValueExpression getValueExpression(String name) {
if (name.equals("uploadedFile")) {
return super.getValueExpression("value");
}
return super.getValueExpression(name);
}
/**
* Set the ValueExpression stored for the
* specified name (if any), respecting any property
* aliases.
*
* @param name Name of value binding to set
* @param binding ValueExpression to set, or null to remove
*/
@Override
public void setValueExpression(String name, ValueExpression binding) {
if (name.equals("uploadedFile")) {
super.setValueExpression("value", binding);
return;
}
super.setValueExpression(name, binding);
}
/**
* The converter attribute is used to specify a method to translate native
* property values to String and back for this component. The converter
* attribute value must be one of the following:
*
* - a JavaServer Faces EL expression that resolves to a
* backing bean or bean property that implements the
*
javax.faces.converter.Converter interface; or
* - the ID of a registered converter (a String).
*/
@Property(name = "converter", isHidden = true, isAttribute = true)
@Override
public Converter getConverter() {
return super.getConverter();
}
/**
* The maximum number of characters that can be entered for this field.
*/
@Property(name = "maxLength", isHidden = true, isAttribute = true)
@Override
public int getMaxLength() {
return super.getMaxLength();
}
// Hide trim
@Property(name = "trim", isHidden = true, isAttribute = false)
@Override
public boolean isTrim() {
return super.isTrim();
}
// Hide text
@Property(name = "text", isHidden = true, isAttribute = false)
@Override
public Object getText() {
return _getText();
}
/**
* Number of character character columns used to render this
* field. The default is 40.
*/
@Property(name = "columns", displayName = "Columns", category = "Appearance",
editorClassName = "com.sun.rave.propertyeditors.IntegerPropertyEditor")
private int columns = Integer.MIN_VALUE;
private boolean columns_set = false;
/**
* Number of character character columns used to render this
* field. The default is 40.
*/
private int _getColumns() {
if (this.columns_set) {
return this.columns;
}
ValueExpression _vb = getValueExpression("columns");
if (_vb != null) {
Object _result = _vb.getValue(getFacesContext().getELContext());
if (_result == null) {
return Integer.MIN_VALUE;
} else {
return ((Integer) _result).intValue();
}
}
return 40;
}
/**
* Number of character character columns used to render this
* field. The default is 40.
* @see #getColumns()
*/
@Override
public void setColumns(int columns) {
this.columns = columns;
this.columns_set = true;
}
/**
* The value of this attribute must be a JSF EL expression, and
* it must resolve to an object of type
* com.sun.webui.jsf.model.UploadedFile. See the JavaDoc for
* this class for details.
*/
@Property(name = "uploadedFile", displayName = "Uploaded File", category = "Data",
editorClassName = "com.sun.rave.propertyeditors.binding.ValueBindingPropertyEditor")
/**
* The value of this attribute must be a JSF EL expression, and
* it must resolve to an object of type
* com.sun.webui.jsf.model.UploadedFile. See the JavaDoc for
* this class for details.
*/
public com.sun.webui.jsf.model.UploadedFile getUploadedFile() {
return (com.sun.webui.jsf.model.UploadedFile) getValue();
}
/**
* The value of this attribute must be a JSF EL expression, and
* it must resolve to an object of type
* com.sun.webui.jsf.model.UploadedFile. See the JavaDoc for
* this class for details.
* @see #getUploadedFile()
*/
public void setUploadedFile(com.sun.webui.jsf.model.UploadedFile uploadedFile) {
setValue((Object) uploadedFile);
}
/**
* Restore the state of this component.
*/
@Override
public void restoreState(FacesContext _context, Object _state) {
Object _values[] = (Object[]) _state;
super.restoreState(_context, _values[0]);
this.columns = ((Integer) _values[1]).intValue();
this.columns_set = ((Boolean) _values[2]).booleanValue();
}
/**
* Save the state of this component.
*/
@Override
public Object saveState(FacesContext _context) {
Object _values[] = new Object[3];
_values[0] = super.saveState(_context);
_values[1] = new Integer(this.columns);
_values[2] = this.columns_set ? Boolean.TRUE : Boolean.FALSE;
return _values;
}
}