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/* *************************************************************************
IT Mill Toolkit
Development of Browser User Intarfaces Made Easy
Copyright (C) 2000-2006 IT Mill Ltd
*************************************************************************
This product is distributed under commercial license that can be found
from the product package on license/license.txt. Use of this product might
require purchasing a commercial license from IT Mill Ltd. For guidelines
on usage, see license/licensing-guidelines.html
*************************************************************************
For more information, contact:
IT Mill Ltd phone: +358 2 4802 7180
Ruukinkatu 2-4 fax: +358 2 4802 7181
20540, Turku email: info@itmill.com
Finland company www: www.itmill.com
Primary source for information and releases: www.itmill.com
********************************************************************** */
package com.itmill.toolkit.terminal;
import com.itmill.toolkit.Application;
import com.itmill.toolkit.service.FileTypeResolver;
/** Class resource is a named resource accessed with the class loader.
*
* This can be used to access resources such as icons, files, etc.
* @see java.lang.Class#getResource(java.lang.String)
*
* @author IT Mill Ltd.
* @version @VERSION@
* @since 3.0
*/
public class ClassResource implements ApplicationResource {
/** Default buffer size for this stream resource */
private int bufferSize = 0;
/** Default cache time for this stream resource */
private long cacheTime = DEFAULT_CACHETIME;
/** Associated class used for indetifying the source of the resource */
private Class associatedClass;
/** Name of the resource is relative to the associated class */
private String resourceName;
/** Application used for serving the class */
private Application application;
/** Create new application resource instance.
* The resource id is relative to the location of the application class.
*
* @param resourceName Unique identifier of the resource within the application.
* @param application The application this resource will be added to.
* */
public ClassResource(String resourceName, Application application) {
this.associatedClass = application.getClass();
this.resourceName = resourceName;
this.application = application;
if (resourceName == null)
throw new NullPointerException();
application.addResource(this);
}
/** Create new application resource instance.
*
* @param associatedClass The class of the which the resource is associated.
* @param resourceName Unique identifier of the resource within the application.
* @param application The application this resource will be added to.
* */
public ClassResource(
Class associatedClass,
String resourceName,
Application application) {
this.associatedClass = associatedClass;
this.resourceName = resourceName;
this.application = application;
if (resourceName == null || associatedClass == null)
throw new NullPointerException();
application.addResource(this);
}
public String getMIMEType() {
return FileTypeResolver.getMIMEType(this.resourceName);
}
public Application getApplication() {
return application;
}
public String getFilename() {
int index = 0;
int next = 0;
while ((next = resourceName.indexOf('/', index)) > 0
&& next + 1 < resourceName.length())
index = next + 1;
return resourceName.substring(index);
}
public DownloadStream getStream() {
DownloadStream ds = new DownloadStream(
associatedClass.getResourceAsStream(resourceName),
getMIMEType(),
getFilename());
ds.setBufferSize(getBufferSize());
ds.setCacheTime(cacheTime);
return ds;
}
/* documented in superclass */
public int getBufferSize() {
return bufferSize;
}
/** Set the size of the download buffer used for this resource.
* @param bufferSize The size of the buffer in bytes.
*/
public void setBufferSize(int bufferSize) {
this.bufferSize = bufferSize;
}
/* documented in superclass */
public long getCacheTime() {
return cacheTime;
}
/** Set lenght of cache expiracy time.
*
* <p>This gives the adapter the possibility cache streams sent to the
* client. The caching may be made in adapter or at the client if the
* client supports caching. Zero or negavive value disbales the
* caching of this stream.</p>
*
* @param cacheTime The cache time in milliseconds.
*
*/
public void setCacheTime(long cacheTime) {
this.cacheTime = cacheTime;
}
}
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