com.sun.mail.handlers.image_gif Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2021 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.mail.handlers;
import jakarta.activation.ActivationDataFlavor;
import jakarta.activation.DataSource;
import java.awt.Image;
import java.awt.Toolkit;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* DataContentHandler for image/gif.
*/
public class image_gif extends handler_base {
private static ActivationDataFlavor[] myDF = {
new ActivationDataFlavor(Image.class, "image/gif", "GIF Image")
};
/**
* Creates a default {@code image_gif}.
*/
public image_gif() {
}
@Override
protected ActivationDataFlavor[] getDataFlavors() {
return myDF;
}
@Override
public Object getContent(DataSource ds) throws IOException {
InputStream is = ds.getInputStream();
int pos = 0;
int count;
byte buf[] = new byte[1024];
while ((count = is.read(buf, pos, buf.length - pos)) != -1) {
pos += count;
if (pos >= buf.length) {
int size = buf.length;
if (size < 256*1024)
size += size;
else
size += 256*1024;
byte tbuf[] = new byte[size];
System.arraycopy(buf, 0, tbuf, 0, pos);
buf = tbuf;
}
}
Toolkit tk = Toolkit.getDefaultToolkit();
return tk.createImage(buf, 0, pos);
}
/**
* Write the object to the output stream, using the specified MIME type.
*/
@Override
public void writeTo(Object obj, String type, OutputStream os)
throws IOException {
if (!(obj instanceof Image))
throw new IOException("\"" + getDataFlavors()[0].getMimeType() +
"\" DataContentHandler requires Image object, " +
"was given object of type " + obj.getClass().toString());
throw new IOException(getDataFlavors()[0].getMimeType() +
" encoding not supported");
}
}