com.sun.mail.handlers.image_gif Maven / Gradle / Ivy
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package com.sun.mail.handlers;
import java.io.*;
import java.awt.*;
import java.awt.datatransfer.DataFlavor;
import javax.activation.*;
import javax.mail.internet.*;
/**
* DataContentHandler for image/gif.
*/
public class image_gif implements DataContentHandler {
private static ActivationDataFlavor myDF = new ActivationDataFlavor(
java.awt.Image.class,
"image/gif",
"GIF Image");
protected ActivationDataFlavor getDF() {
return myDF;
}
/**
* Return the DataFlavors for this DataContentHandler.
*
* @return The DataFlavors
*/
public DataFlavor[] getTransferDataFlavors() { // throws Exception;
return new DataFlavor[] { getDF() };
}
/**
* Return the Transfer Data of type DataFlavor from InputStream.
*
* @param df The DataFlavor
* @param ds The DataSource corresponding to the data
* @return String object
*/
public Object getTransferData(DataFlavor df, DataSource ds)
throws IOException {
// use myDF.equals to be sure to get ActivationDataFlavor.equals,
// which properly ignores Content-Type parameters in comparison
if (getDF().equals(df))
return getContent(ds);
else
return null;
}
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.
*/
public void writeTo(Object obj, String type, OutputStream os)
throws IOException {
if (!(obj instanceof Image))
throw new IOException("\"" + getDF().getMimeType() +
"\" DataContentHandler requires Image object, " +
"was given object of type " + obj.getClass().toString());
throw new IOException(getDF().getMimeType() + " encoding not supported");
}
}