/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed 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.cocoon.woody.formmodel;
import java.util.Locale;
import java.util.StringTokenizer;
import org.apache.cocoon.servlet.multipart.Part;
import org.apache.cocoon.woody.Constants;
import org.apache.cocoon.woody.FormContext;
import org.apache.cocoon.woody.validation.ValidationError;
import org.apache.cocoon.woody.util.I18nMessage;
import org.apache.cocoon.woody.validation.ValidationErrorAware;
import org.apache.cocoon.xml.AttributesImpl;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* A file-uploading Widget. This widget gives access via Woody, to Cocoon's
* file upload functionality.
*
* @author <a href="mailto:uv@upaya.co.uk">Upayavira</a>
* @author <a href="http://www.apache.org/~sylvain/">Sylvain Wallez</a>
* @version CVS $Id: Upload.java,v 1.8 2004/03/09 13:53:56 reinhard Exp $
*/
public class Upload extends AbstractWidget implements ValidationErrorAware {
private UploadDefinition uploadDefinition;
private Part part;
private ValidationError validationError;
public Upload(UploadDefinition uploadDefinition) {
this.uploadDefinition = uploadDefinition;
this.setDefinition(uploadDefinition);
setLocation(uploadDefinition.getLocation());
}
public UploadDefinition getUploadDefinition() {
return this.uploadDefinition;
}
public String getId() {
return definition.getId();
}
public Object getValue() {
return this.part;
}
public void setValue(Object object) {
throw new RuntimeException("Cannot manually set the value of an upload widget for field \"" + getFullyQualifiedId() + "\"");
}
public void readFromRequest(FormContext formContext) {
Object obj = formContext.getRequest().get(getFullyQualifiedId());
// If the request object is a Part, keep it
if (obj instanceof Part) {
Part requestPart = (Part)obj;
if (this.part != null) {
// Replace the current part
this.part.dispose();
}
// Keep the request part
requestPart.setDisposeWithRequest(false);
this.part = requestPart;
this.validationError = null;
// If it's not a part and not null, clear any existing value
// We also check if we're the submit widget, as a result of clicking the "..." button
} else if (obj != null || getForm().getSubmitWidget() == this){
// Clear the part, if any
if (this.part != null) {
this.part.dispose();
this.part = null;
}
this.validationError = null;
}
// And keep the current state if the parameter doesn't exist or is null
}
public boolean validate(FormContext formContext) {
if (this.part == null) {
if (this.uploadDefinition.isRequired()) {
this.validationError = new ValidationError(new I18nMessage("general.field-required", Constants.I18N_CATALOGUE));
}
} else {
String mimeTypes = this.uploadDefinition.getMimeTypes();
if (mimeTypes != null) {
StringTokenizer tok = new StringTokenizer(this.uploadDefinition.getMimeTypes(), ", ");
this.validationError = new ValidationError(new I18nMessage("upload.invalid-type", Constants.I18N_CATALOGUE));
String contentType = this.part.getMimeType();
while (tok.hasMoreTokens()) {
if (tok.nextToken().equals(contentType)) {
this.validationError = null;
}
}
} else {
this.validationError = null;
}
}
return validationError == null ? super.validate(formContext) : false;
}
/**
* Returns the validation error, if any. There will always be a validation error in case the
* {@link #validate(FormContext)} method returned false.
*/
public ValidationError getValidationError() {
return validationError;
}
/**
* Set a validation error on this field. This allows fields to be externally marked as invalid by
* application logic.
*
* @param error the validation error
*/
public void setValidationError(ValidationError error) {
this.validationError = error;
}
private static final String FIELD_EL = "upload";
private static final String VALUE_EL = "value";
private static final String VALIDATION_MSG_EL = "validation-message";
public void generateSaxFragment(ContentHandler contentHandler, Locale locale) throws SAXException {
AttributesImpl fieldAttrs = new AttributesImpl();
fieldAttrs.addCDATAAttribute("id", getFullyQualifiedId());
fieldAttrs.addCDATAAttribute("required", String.valueOf(uploadDefinition.isRequired()));
if (uploadDefinition.getMimeTypes() != null) {
fieldAttrs.addCDATAAttribute("mime-types", uploadDefinition.getMimeTypes());
}
contentHandler.startElement(Constants.WI_NS, FIELD_EL, Constants.WI_PREFIX_COLON + FIELD_EL, fieldAttrs);
if (this.part != null) {
String name = (String)this.part.getHeaders().get("filename");
contentHandler.startElement(Constants.WI_NS, VALUE_EL, Constants.WI_PREFIX_COLON + VALUE_EL, Constants.EMPTY_ATTRS);
contentHandler.characters(name.toCharArray(), 0, name.length());
contentHandler.endElement(Constants.WI_NS, VALUE_EL, Constants.WI_PREFIX_COLON + VALUE_EL);
}
// validation message element: only present if the value is not valid
if (validationError != null) {
contentHandler.startElement(Constants.WI_NS, VALIDATION_MSG_EL, Constants.WI_PREFIX_COLON + VALIDATION_MSG_EL, Constants.EMPTY_ATTRS);
validationError.generateSaxFragment(contentHandler);
contentHandler.endElement(Constants.WI_NS, VALIDATION_MSG_EL, Constants.WI_PREFIX_COLON + VALIDATION_MSG_EL);
}
// the display data
this.definition.generateDisplayData(contentHandler);
contentHandler.endElement(Constants.WI_NS, FIELD_EL, Constants.WI_PREFIX_COLON + FIELD_EL);
}
public void generateLabel(ContentHandler contentHandler) throws SAXException {
definition.generateLabel(contentHandler);
}
}